User Manual Moseley PCL-6000
User Manual
Moseley PCL-6000
Doc. 602-13375-01
May 2003
Moseley PCL6000
WARRANTY
All equipment designed and manufactured by Moseley Associates, Inc., is warranted against
defects in workmanship and material that develop under normal use within a period of (2) years from the
date of original shipment, and is also warranted to meet any specifications represented in writing by
Moseley Associates, Inc., so long as the purchaser is not in default under his contract of purchase and
subject to the following additional conditions and limitations:
1.
The sole responsibility of Moseley Associates, Inc., for any equipment not conforming to
this Warranty shall be, at its option:
A.
to repair or replace such equipment or otherwise cause it to meet the represented
specifications either at the purchaser's installation or upon the return thereof f.o.b. Santa Barbara,
California, as directed by Moseley Associates, Inc.; or
B.
to accept the return thereof f.o.b. Santa Barbara, California, credit the purchaser's account
for the unpaid portion, if any, of the purchase price, and refund to the purchaser, without interest,
any portion of the purchase price theretofore paid; or
C.
to demonstrate that the equipment has no defect in workmanship or material and that it
meets the represented specification, in which event all expenses reasonably incurred by Moseley
Associates, Inc., in so demonstrating, including but not limited to costs of travel to and from the
purchaser's installation, and subsistence, shall be paid by purchaser to Moseley Associates, Inc.
2.
In case of any equipment thought to be defective, the purchaser shall promptly notify
Moseley Associates, Inc., in writing, giving full particulars as to the defects. Upon receipt of such notice,
Moseley Associates, Inc. will give instructions respecting the shipment of the equipment or such other
manner as it elects to service this Warranty as above provided.
3.
This Warranty extends only to the original purchaser and is not assignable or transferable,
does not extend to any shipment which has been subjected to abuse, misuse, physical damage, alteration,
operation under improper conditions or improper installation, use or maintenance, and does not extend to
equipment or parts not manufactured by Moseley Associates, Inc., and such equipment and parts are
subject to only adjustments as are available from the manufacturer thereof.
4.
NO OTHER WARRANTIES, EXPRESS OR IMPLIED, SHALL BE APPLICABLE TO
ANY EQUIPMENT SOLD BY MOSELEY ASSOCIATES, INC., AND NO REPRESENTATIVE OR
OTHER PERSON IS AUTHORIZED BY MOSELEY ASSOCIATES, INC., TO ASSUME FOR IT ANY
LIABILITY OR OBLIGATION WITH RESPECT TO THE CONDITION OR PERFORMANCE OF ANY
EQUIPMENT SOLD BY IT, EXCEPT AS PROVIDED IN THIS WARRANTY. THIS WARRANTY
PROVIDES FOR THE SOLE RIGHT AND REMEDY OF THE PURCHASER AND MOSELEY
ASSOCIATES, INC. SHALL IN NO EVENT HAVE ANY LIABILITY FOR CONSEQUENTIAL
DAMAGES OR FOR LOSS, DAMAGE OR EXPENSE DIRECTLY OR INDIRECTLY ARISING FROM
THE USE OF EQUIPMENT PURCHASED FROM MOSELEY ASSOCIATES, INC.
PCL6000
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Moseley PCL6000
FCC Notice
Note: This equipment has been tested and found to comply with the limits
for a Class A digital device, pursuant to part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely
to cause harmful interference in which case the user will be required to
correct the interference at his own expense.
Any external data or audio connection to this equipment must use
shielded cables.
PCL6000 Manual Dwg # 602-13375-01; Revision Levels:
SECTION
DWG
REV
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A
ECO
REVISED/
RELEASED
PCL6000
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Moseley PCL6000
Table of Contents
1
SYSTEM CHARACTERISTICS ..................................................................................... 1-1
1.1
Introduction................................................................................................................................................... 1-1
1.2
System Features ............................................................................................................................................ 1-1
1.3
System Specifications .................................................................................................................................. 1-2
1.3.1
PCL6020, PCL6030, PCL6060 Composite System.........................................................................1-2
1.3.2
PCL6020, PCL6030, PCL6060 Monaural System...........................................................................1-3
1.3.3
PCL6010 Transmitter Specifications..................................................................................................1-3
1.3.4
1.3.4 PCL6020, PCL6030, PCL6060 Receiver Specifications.......................................................1-4
1.4
System Description....................................................................................................................................... 1-5
1.4.1
PCL6010 Transmitter ............................................................................................................................1-5
1.4.2
PCL6020, PCL6030, PCL6060 Receivers .........................................................................................1-8
2
2.1
INSTALLATION ........................................................................................................... 2-1
Unpacking....................................................................................................................................................... 2-1
2.2
Power ............................................................................................................................................................... 2-1
2.2.1
AC Line Voltage Selection...................................................................................................................2-1
2.2.2
DC Option................................................................................................................................................2-3
2.3
Pre-installation Checkout........................................................................................................................... 2-3
2.4
Rack Installation........................................................................................................................................... 2-5
2.5
Antenna Installation .................................................................................................................................... 2-6
2.6
Transmission Cables.................................................................................................................................... 2-7
2.7
Program and Multiplex Installation — Transmitter.......................................................................... 2-9
2.8
Program and Multiplex Installation — Receiver ..............................................................................2-12
2.9
Main/Standby Interconnect.....................................................................................................................2-13
2.9.1
Transmitter Interconnect.....................................................................................................................2-14
2.9.2
Receiver Interconnect — Other STL Receivers..............................................................................2-17
2.9.3
Receiver Interconnect — PCL6000/606/600 Composite ..............................................................2-18
2.9.4
Receiver Interconnect — PCL6000/606/600 Mono.......................................................................2-19
2.10
Remote Control of the STL Transmitter .............................................................................................2-19
2.11
Multichannel Remote Interconnect (Option) .....................................................................................2-21
3
3.1
OPERATION ................................................................................................................ 3-1
Introduction................................................................................................................................................... 3-1
3.2
Transmitter Operational Controls .......................................................................................................... 3-1
3.2.1
Transmitter Front Panel.........................................................................................................................3-1
3.2.2
Transmitter Rear Panel..........................................................................................................................3-2
3.2.3
Multichannel Transmitter Operation...................................................................................................3-3
3.3
Receiver Operational Controls ................................................................................................................. 3-4
3.3.1
Receiver Front Panel..............................................................................................................................3-4
3.3.2
Receiver Rear Panel...............................................................................................................................3-7
3.3.3
Multichannel Receiver Operation........................................................................................................3-8
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Moseley PCL6000
4
4.1
MODULE CHARACTERISTICS ..................................................................................... 4-1
Introduction................................................................................................................................................... 4-1
4.2
Transmitter Theory of Operation............................................................................................................ 4-1
4.2.1
Transmitter Audio/Power Supply ........................................................................................................4-1
4.2.2
Transmitter RF Module .........................................................................................................................4-3
4.2.3
RF Amplifier ...........................................................................................................................................4-8
4.2.4
Channel Control Board (Multichannel Option)...............................................................................4-10
4.3
Receiver Theory of Operation ................................................................................................................4-12
4.3.1
Receiver Audio/Power Supply ...........................................................................................................4-12
4.3.2
Receiver RF Module ............................................................................................................................4-14
4.3.3
Preamp/1st Mixer (950 MHz, PCL6060).........................................................................................4-17
4.3.4
IF Demod (PCL6020)..........................................................................................................................4-17
4.3.5
Double Converter/LO3 (PCL6030/6060).........................................................................................4-18
4.3.6
FM Demod (PCL6030/6060) .............................................................................................................4-18
4.3.7
Adjacent Channel Filter (PCL6060) .................................................................................................4-19
4.3.8
Channel Control Board (Multichannel Option)...............................................................................4-20
5
ALIGNMENT ................................................................................................................ 5-1
5.1
Introduction................................................................................................................................................... 5-1
5.2
Test Equipment............................................................................................................................................. 5-1
5.3
Alignment Procedures................................................................................................................................. 5-3
5.3.1
STL Frequency Alignment ...................................................................................................................5-3
5.3.2
Receiver Sensitivity ...............................................................................................................................5-5
5.3.3
Receiver Selectivity ...............................................................................................................................5-7
5.3.4
Transmitter Deviation and Receiver Output Level Calibration......................................................5-8
5.3.5
Ultimate Signal-to-Noise Ratio ..........................................................................................................5-13
5.3.6
Distortion Alignment ...........................................................................................................................5-14
5.3.7
Stereo Separation and Stereo Signal-to-Noise Ratio ......................................................................5-17
5.3.8
Stereo Crosstalk ....................................................................................................................................5-21
5.3.9
STL Frequency Change.......................................................................................................................5-23
5.3.10
FMO Adjustment..................................................................................................................................5-31
5.3.11
Transmitter Troubleshooting Procedure...........................................................................................5-33
5.4
Module Adjustments Information.........................................................................................................5-34
5.4.1
Transmitter Audio/Power Supply ......................................................................................................5-34
5.4.2
Transmitter RF Module .......................................................................................................................5-36
5.4.3
Doubler Assembly (1.7 GHz).............................................................................................................5-37
5.4.4
RF Amplifier .........................................................................................................................................5-37
5.4.5
Receiver Audio/Power Supply ...........................................................................................................5-38
5.4.6
Receiver RF Module ............................................................................................................................5-40
5.4.7
IF Demod (PCL6020)..........................................................................................................................5-41
5.4.8
Double Converter/LO3 (PCL6030/6060).........................................................................................5-42
5.4.9
Preamp/1st Mixer (950 MHz, PCL6060).........................................................................................5-42
5.4.10
FM Demod (PCL6030/6060) .............................................................................................................5-42
5.4.11
Adjacent Channel Filter (PCL6060) .................................................................................................5-43
5.4.12
Channel Control Board (Multichannel Option)...............................................................................5-43
5.5
6
6.1
Test Fixture Diagrams ..............................................................................................................................5-45
CUSTOMER SERVICE ................................................................................................. 6-1
Introduction................................................................................................................................................... 6-1
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Moseley PCL6000
6.2
Technical Consultation ............................................................................................................................... 6-1
6.3
Factory Service.............................................................................................................................................. 6-2
6.4
Field Repair ................................................................................................................................................... 6-2
7
SCHEMATICS AND ASSEM BLY DRAWINGS............................................................... 7-1
7.1
PCL 6000-220 STD (602-10300-71 Rev A) ............................................................................................ 7-1
7.2
PCL 6000-330/450 STD (602-10301-71 Rev A)...................................................................................7-32
7.3
PCL 6000-950 STD 602-10299-71 Rev A .............................................................................................7-66
7.4
PCL 6000-1.7 GHz Standard System..................................................................................................7-103
PCL6000
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Moseley PCL6000
List of Figures
Figure 1-1a,b: PCL6010 Transmitter Block and Level................................................. 1-12,13
Figure 1-2a,b: PCL6020 Receiver Block and Level..................................................... 1-14,15
Figure 1-3a,b: PCL6030 Receiver Block and Level..................................................... 1-16,17
Figure 1-4a,b: PCL6060 Receiver Block and Level..................................................... 1-18,19
Figure 2-1 Line Filter/Fuse Holder Programming (Detail shows 100 VAC operation selected)
................................................................................................................................... 2-2
Figure 2-2 Typical Bench Test Setup................................................................................. 2-4
Figure 2-3 Typical PCL6000 Site Installation ..................................................................... 2-8
Figure 2-4 Transmitter PGM and MUX Interconnect — Composite.................................... 2-9
Figure 2-5 Transmitter PGM and MUX Interconnect — Mono.......................................... 2-11
Figure 2-6 Receiver PGM and MUX Interconnect — Composite...................................... 2-12
Figure 2-7 Receiver PGM and MUX Interconnect — Mono.............................................. 2-13
Figure 2-8 Main/Standby Transmitter Interconnect — Composite.................................... 2-15
Figure 2-9 Main/Standby Transmitter Interconnect — Mono............................................ 2-16
Figure 2-10 Main/Standby Receiver Interconnect — Other STL Receivers...................... 2-17
Figure 2-11 Main/Standby Receiver Interconnect — PCL6000 Composite....................... 2-18
Figure 2-12 Main/Standby Receiver Interconnect — PCL6000 Mono............................... 2-19
Figure 2-13 Transmitter I/O Remote Connector Pin-Out (Rev. A) .................................... 2-20
Figure 2-14 Transmitter I/O Remote Connector Pin-Out (Rev. B or Later) ....................... 2-20
Figure 2-15 Transmitter Channel Control Connector Pin-Out........................................... 2-21
Figure 3-1 PCL6010 Transmitter Front Panel (Standard)................................................... 3-1
Figure 3-2 PCL6010 Transmitter Rear Panel..................................................................... 3-3
Figure 3-3 PCL6010 Transmitter Rear Panel (DC Option) ................................................. 3-3
Figure 3-4 PCL6010 Transmitter Front Panel (Multichannel Option) .................................. 3-3
Figure 3-5 PCL6020 Receiver Front Panel (Standard)....................................................... 3-5
Figure 3-6 PCL6030 Receiver Front Panel (Standard)....................................................... 3-5
Figure 3-7 PCL6060 Receiver Front Panel (Standard)....................................................... 3-5
Figure 3-8 Typical SNR Curves ......................................................................................... 3-7
Figure 3-9 PCL6000 Receiver Rear Panel......................................................................... 3-7
Figure 3-10 PCL6000 Receiver Rear Panel (DC Option)................................................... 3-8
Figure 3-11 PCL6020 Receiver Front Panel (Multichannel Option) .................................... 3-8
Figure 5-1 Test Setup for Frequency Alignment................................................................. 5-4
Figure 5-2 Sensitivity Test Setup ....................................................................................... 5-5
Figure 5-3 Selectivity Test Setup ....................................................................................... 5-7
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Figure 5-4 Test Setup For Deviation Alignment ................................................................. 5-9
Figure 5-5a Bessel Null Function Waveform.................................................................... 5-10
Figure 5-6 Test Setup for MUX Channel Alignment ......................................................... 5-12
Figure 5-7 Test Setup For Signal-To-Noise Ratio Measurement...................................... 5-14
Figure 5-8 Test Setup for Distortion Alignment ................................................................ 5-15
Figure 5-9 Stereo Separation Test Setup......................................................................... 5-17
Figure 5-10 Swept Separation Waveform........................................................................ 5-19
Figure 5-11 Stereo Crosstalk Setup................................................................................. 5-21
Figure 5-12a Nonlinear Crosstalk, Main to Sub................................................................ 5-23
Figure 5-13 Test Setup for FMO Adjustment.................................................................... 5-31
Figure 5-14 50 Hz High-Pass Filter.................................................................................. 5-45
Figure 5-15 75 µs De-Emphasis with 30 Hz High-Pass Filter........................................... 5-45
PCL6000
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List of Tables
Table 2-1 Transmitter and Receiver Fuse Settings........................................................... 2-2
Table 2-2 Transmitter and Receiver Standard DC Fuse Values........................................ 2-3
Table 2-3 Remote Connector Wiring Guide .................................................................... 2-14
Table 2-4 Channel Control Remote Interface Logic ........................................................ 2-22
Table 3-1 Transmitter Meter Functions and Scales........................................................... 3-2
Table 3-2 Receiver Meter Functions and Scales................................................................ 3-6
Table 4-1 Transmitter Channel 0 Programming ............................................................... 4-11
Table 4-2 Receiver Channel 0 Programming ................................................................. 4-20
Table 5-1 Recommended Test Equipment........................................................................ 5-1
Table 5-2 Frequency Selection Chart – 950 MHz band.................................................... 5-24
Table 5-3 Synthesizer Frequency Selection Switch Settings........................................... 5-30
PCL6000
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Moseley PCL6000
Glossary
AFC
Automatic Frequency Control
AM
Amplitude Modulation
AGC
Automatic Gain Control
BB
Baseband
BCD
Binary Coded Decimal
BPF
Band Pass Filter
BW
Bandwidth
Comp
Composite
dB
Decibel
dBc
Decibel Relative to Carrier
dBm
Decibel Relative to 1 mW
DP
Decimal Point
DVM
Digital Voltmeter
EMI
Electromagnetic Interference
EPROM
Erasable Programmable Read-Only Memory
ESD
Electrostatic Discharge, Electrostatic Damage
FCC
Federal Communications Commission
FET
Field Effect Transistor
FM
Frequency Modulation
FMO
Frequency Modulation Oscillator
FSK
Frequency Shift Keying
GHz
Gigahertz
HF
High Frequency
HPF
High Pass Filter
IC
Integrated Circuit
IEC
International Electrotechnical Commission
IF
Intermediate Frequency
IMD
Intermodulation Distortion
I/O
Input/Output
IPA
Intermediate Power Amplifier
kHz
Kilohertz
LED
Light-Emitting Diode
LF
Low Frequency
LO
Local Oscillator
PCL6000
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Moseley PCL6000
LPF
Low Pass Filter
MHz
Megahertz
MAI
Moseley Associates, Inc.
Mono
Monaural
ms
Millisecond
mW
Milliwatt
PCL6000
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Moseley PCL6000
1-1
1 System Characteristics
1.1 Introduction
The PCL6000 Studio-to-Transmitter Link (STL) is designed to convey FM program material from
a studio site to a transmitter site. The PCL6000 also simultaneously conveys control and
secondary programming subcarriers. This equipment may also be used to provide high-quality
program transmission in intercity relay service.
The PCL6000 series is a family of equipment that can operate in several bands from 150 MHz
through 1.7 GHz. This operating manual covers the 220 MHz, 330 MHz, 450 MHz, 950 MHz, and
1.7 GHz bands of operation and the various configurations in those bands.
1.2 System Features
In addition to establishing a new industry standard for performance, the PCL6000 incorporates
many new and innovative features to aid in the installation, operation, and maintenance of a
system. Some of the features are:
§
Very low distortion ceramic IF filters offering unprecedented selectivity.
§
Peak reading meter for all major functions.
§
Two-decade logarithmic true signal strength meter.
§
Important status functions implemented with bi-color LED indicators.
§
Designed to have a minimum of adjustments for trouble-free operation.
§
Modular construction that provides excellent shielding and at the same time allows easy
access to components.
§
Multichannel Option: Up to sixteen pre-programmed channels available with remote
operation capabilities.
NOTE: Please study the manual at least through Section 5 before attempting to install the
system.
PCL6000
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1-2
System Characteristics
1.3 System Specifications
1.3.1 PCL6020, PCL6030, PCL6060 Composite System
Frequency Range:
148–174 MHz
215–240 MHz
300–330 MHz
440–470 MHz
890–960 MHz
1.5–1.7 GHz
Channel Spacing:
Frequency Response:
100–500 kHz (500 kHz standard)
± 0.2 dB or better, 30 Hz–53 kHz
± 0.3 dB or better, 30 kHz–75 kHz
Distortion (THD and IMD)
PCL6020:
0.2% or less, 30 Hz–7.5kHz
(typically better than 0.15% at 1 kHz)
Convolved stereo demodulation products greater than 50 dB
below the 100% modulation reference level (400 Hz) from
7.5 kHz–15 kHz
PCL6030/6060:
0.1% or less, 30 Hz–7.5 kHz
(typically better than 0.1% at 1 kHz)
Convolved stereo demodulation products greater than 50 dB
below the 100% modulation reference level (400 Hz) from
7.5 kHz–15 kHz
Stereo Separation
PCL6020:
50 dB or better, 50 Hz–15 kHz
(typically 55 dB or better)
PCL6030/6060:
51 dB or better, 50 Hz–15 kHz
(typically 55 dB or better)
Nonlinear Crosstalk
PCL6020:
50 dB or better (Sub to Main Channel)
PCL6030/6060:
51 dB or better (Main to Sub Channel)
Signal-to-Noise Ratio
PCL6020:
PCL6030/6060:
Emission:
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72 dB or better (typically 75 dB)
Demodulated,de-emphasized (left or right)
Referenced to 100% modulation
75 dB or better (typically 77 dB)
Demodulated, de-emphasized (left or right)
Referenced to 100% modulation
500F9
Moseley PCL6000
1-3
1.3.2 PCL6020, PCL6030, PCL6060 Monaural System
Frequency Range:
148–174 MHz
215–240 MHz
300–330 MHz
440–470 MHz
890–960 MHz
1.5–1.7 GHz
Frequency Response:
± 0.3 dB or better, 30 Hz–15 kHz
Distortion (THD and IMD)
PCL6020:
PCL6030/6060:
Signal-to-Noise Ratio
PCL6020:
PCL6030/6060:
0.2% or less, 30 Hz–15 kHz
(typically better than 0.15% at 1 kHz)
0.1% or less, 30 Hz–15 kHz
(typically better than 0.10% at 1 kHz)
72 dB or better (typically 75 dB)
Referenced to 100% modulation
75 dB or better (typically 77 dB)
Referenced to 100% modulation
Operating Temperature:
-20°C to +70°C
Emission:
110F3 (no subcarrier)
110F9 (with 26 kHz control subcarrier)
230F9 (with 67 kHz program subcarrier)
1.3.3 PCL6010 Transmitter Specifications
Type:
Solid state
Direct FM
Frequency synthesized
Crystal referenced
RF Power Output
800–960 MHz:
148–470 MHz:
1.5–1.7 GHz:
RF Output Connector:
6 watts minimum, 8 watts maximum
10 watts minimum, 15 watts maximum
5 watts minimum, 7 watts maximum
Type N Female, 50 ohm
Deviation (100% Modulation)
Composite:
Monaural:
± 50 kHz
± 40 kHz
Frequency Stability:
Better than 0.00025% (2.5 ppm) from 0°C to 50°C
Spurious & Harmonic Emission:
More than 60 dB below carrier level
Modulation Capability:
One program and two subcarrier channels
Modulation Inputs
Composite:
3.5 Vp-p @ 6 Kilohms, unbalanced
Frequency range: 30 Hz –80 kHz
(1 BNC connector)
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1-4
System Characteristics
Monaural:
MUX 1:
MUX 2:
+10 dBm @ 600 ohms, balanced, floating
Frequency range: 30 Hz –15 kHz
(Barrier strip connector)
1.5 Vp-p @ 4 Kilohms, unbalanced
Frequency range: 85–200 kHz
(1 BNC connector)
1.5 Vp-p @ 4 Kilohms, unbalanced
Frequency range: 85–200 kHz
(1 BNC connector)
Power, AC:
100/120/220/240 VAC (±10%), 50/60 Hz, 70 watts
Power, DC Options
Isolated ground (factory standard)
Chassis negative ground (user selectable)
10–20 VDC, 70 watts
18–36 VDC, 70 watts
36–72 VDC, 70 watts
12 VDC:
24 VDC:
48 VDC:
Dimensions:
3.5" (8.9 cm) high
19.0" (48.3 cm) wide
16.5" (41.9 cm) deep
Shipping Weight:
12.7 kg (28 lb) domestic
1.3.4 PCL6020, PCL6030, PCL6060 Receiver Specifications
RF Input Connector:
Type N female, 50 ohm
Sensitivity
PCL6020 Composite:
120 mV or less required for 60 dB SNR;
left or right channel de-emphasized, demodulated
PCL6020 Monaural:
PCL6030/6060 Composite:
20 mV or less required for 60 dB SNR
100 mV or less required for 60 dB SNR;
left or right channel de-emphasized, demodulated
PCL6030/6060 Monaural:
20 mV or less required for 60 dB SNR
Selectivity
Composite:
Monaural:
Spectral Efficient Composite:
Adjacent Channel Level
(to degrade SNR by 3 dB)
PCL6020:
PCL6030/6060:
3 dB IF bandwidth: ± 125 kHz
80 dB IF bandwidth: ± 1.2 MHz
3 dB IF bandwidth: ± 90 kHz
80 dB IF bandwidth: ± 1.2 MHz
3 dB IF bandwidth: ± 100 kHz
80 dB IF bandwidth: ± 1.0 MHz
+10 dBc
wide band: +20 dBc
narrow band: +10 dBc
Modulation Outputs
Composite:
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3.5 Vp-p @ 200 ohm, unbalanced
Frequency range: 30 Hz –80 kHz
Moseley PCL6000
1-5
(2 BNC connectors, parallel connection)
Monaural:
MUX:
+10 dBm @ 600 ohms, balanced
Frequency range: 30 Hz –15 kHz
(Barrier strip connector)
1.5 Vp-p @ 100 ohm, unbalanced
Frequency range: 85–200 kHz
(2 BNC connectors, parallel connection)
Power, AC:
100/120/220/240 VAC (±10%), 50/60 Hz, 30 Watts
Power, DC Options
Isolated ground (factory standard)
Chassis negative ground (user selectable)
10–20 VDC, 30 watts
18–36 VDC, 30 watts
36–72 VDC, 30 watts
12 VDC:
24 VDC:
48 VDC:
Dimensions:
3.5" (8.9 cm) high
19.0" (48.3 cm) wide
16.5" (41.9 cm) deep
Shipping Weight:
12.7 kg (28 lb) domestic
1.4 System Description
1.4.1 PCL6010 Transmitter
The PCL6010 Transmitter is a high-fidelity broadband FM transmitter with a power output of 5–15
watts (depending on frequency and system configuration). It is capable of transmitting the
program signal and two multiplex subcarriers with little degradation of signal quality over one link.
The linearity and FM noise characteristics of the direct FM oscillator are exceptional. The
transmitter is modular in construction and operation, and the system description given below
follows the signal flow through the various modules.
Refer to Figures 1-1a and 1-1b, PCL6010 Transmitter Block and Level Diagram. Assembly
drawings and schematics for the complete transmitter system and for its modules are located in
Section 7.
Audio Processor
The Audio Processor is located in the TX Audio/Power Supply board. Three signal inputs are
provided to the Audio Processor module—one audio (composite or monaural) signal and two
multiplex signals. The composite input level is 3.5 Vp-p (5.7 kohms), mono input level is +10 dBm
(600 ohms, selectable), mux input level is 1.5 Vp-p. 75 µs pre-emphasis is selectable. The board is
jumper-programmable for composite, mono, or digital input operation and level adjustments are
provided for all functions. Summing amplifiers combine the inputs into a single baseband signal
that is passed on to the FMO Synthesizer in the RF module.
FMO Synthesizer
The baseband signal from the Audio Processor modulates the frequency modulated oscillator
(FMO) in the RF module. The FMO consists of a 60–80 MHz ultralinear, very low noise VCO
which is phase locked to a crystal-controlled reference oscillator. The phase lock loop contains
the frequency programming switches which allow the synthesizer to be changed in frequency
steps of 25 kHz. The RF output of the FMO is filtered to attenuate any harmonics. With 100%
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1-6
System Characteristics
modulation, the RF signal will deviate ±50 kHz (composite) or ±40 kHz (monaural) from the
carrier. The output power of the FMO is approximately 1 mW.
1st Local Oscillator (950 MHz)
The 1st Local Oscillator (LO1) section of the RF module consists of an oven controlled crystal
oscillator, a doubler, and a step recovery diode (SRD) multiplier. The oscillator operates at 102
MHz (nominal). The resultant multiplication factor of the LO is X10. The output (1020 MHz) is
filtered and attenuated before being applied to the upconverter mixer. A level detector provides
front panel metering information. The output power is approximately +10 dBm.
1st Local Oscillator (330/450 MHz)
The 1st Local Oscillator (LO1) section of the RF module consists of an oven controlled crystal
oscillator, a doubler, and a step recovery diode (SRD) multiplier. The oscillator operates at 96.25
MHz (nominal). The resultant multiplication factor of the LO is X4. The output (385 MHz) is
externally filtered and then attenuated before being applied to the upconverter mixer. A level
detector provides front panel metering information. The output power is approximately +10 dBm.
1st Local Oscillator (220 MHz)
The 1st Local Oscillator (LO1) section of the RF module consists of an oven controlled crystal
oscillator and a step recovery diode (SRD) multiplier. The oscillator operates at 97 MHz
(nominal). The resultant multiplication factor of the LO is X3. The output (291 MHz) is externally
filtered and then attenuated before being applied to the upconverter mixer. A level detector
provides front panel metering information. The output power is approximately +10 dBm.
1st Local Oscillator (1.7 GHz)
The TX RF module output frequency (850 MHz, nominal) is multiplied (X2) in the Doubler
Assembly to achieve the desired carrier frequency (1.7 GHz, nominal). Therefore, the operating
frequency of the 1st LO is nearly identical to the 950 MHz band configuration. The 1st LO (LO1)
section of the RF module consists of an oven controlled crystal oscillator, a doubler, and a step
recovery diode (SRD) multiplier. The oscillator operates at 92 MHz (nominal). The resultant
multiplication factor of the LO is X10. The output (920 MHz) is filtered and attenuated before
being applied to the upconverter mixer. A level detector provides front panel metering information.
The output power is approximately +10 dBm.
Up Converter
To preserve the low noise and low distortion characteristics of the FMO, the RF signal is upconverted to the required carrier frequency through the use of a double-balanced mixer and the
1st Local Oscillator (LO1). The appropriate mix product is selected with a bandpass filter. The
Intermediate Power Amplifier (IPA) amplifies the signal to a level high enough to drive the RF
power amplifier (RFA) or the Doubler Assembly in the 1.7 GHz system. The Upconverter/IPA is
located in the RF module.
RF Amplifier (950 MHz)
The RF Amplifier module internally consists of a three-stage hybrid amplifier, which amplifies the
input signal (40 mW, typical) to the nominal 6-watt transmitter output. The output is filtered to
attenuate all higher order harmonics to a level of at least -60 dBc. The output is sampled via a
dual directional coupler with detectors that provide an indication of the forward and reflected
power of the RF amplifier. The final stage current is sampled and metered in this module.
RF Amplifier (450 MHz)
The RF Amplifier module internally consists of a three-stage hybrid amplifier, which amplifies the
input signal (100 mW, typical) to the nominal 10-watt transmitter output. The output is filtered to
attenuate all higher order harmonics to a level of at least -60 dBc. The output is sampled via a
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Moseley PCL6000
1-7
dual directional coupler with detectors that provide an indication of the forward and reflected
power of the RF amplifier. The final stage current is sampled and metered in this module.
RF Amplifier (330 MHz)
The RF Amplifier module internally consists of a three-stage discrete design, which amplifies the
input signal (100 mW, typical) to the nominal 10-watt transmitter output. The output is filtered to
attenuate all higher order harmonics to a level of at least -60 dBc. The output is sampled via a
dual directional coupler with detectors that provide an indication of the forward and reflected
power of the RF amplifier. The final stage current is sampled and metered in this module.
RF Amplifier (220 MHz)
The RF Amplifier module internally consists of a two-stage discrete design, which amplifies the
input signal (100 mW, typical) to the nominal 10-watt transmitter output. The output is filtered to
attenuate all higher order harmonics to a level of at least -60 dBc. The output is sampled via a
dual directional coupler with detectors that provide an indication of the forward and reflected
power of the RF amplifier. The final stage current is sampled and metered in this module.
Doubler Assembly (1.7 GHz)
The output frequency of the TX RF module is one-half the desired carrier frequency (850 MHz,
nominal). The output is applied to the Doubler Assembly which multiplies the signal (X2) and is
filtered before being amplified by the RFA (1.7 GHz, nominal).
RF Amplifier (1.7 GHz)
The RF Amplifier module internally consists of a four-stage discrete design, which amplifies the
input signal (1 mW, typical) to the nominal 5-watt transmitter output. The output is filtered to
attenuate all higher order harmonics to a level of at least -60 dBc. The output is sampled via a
dual directional coupler with detectors that provide an indication of the forward and reflected
power of the RF amplifier. The final stage current is sampled and metered in this module.
Transmitter Control
The Transmitter Control section of the Audio/Power Supply board has several functions. One of
these is to sense the AFC LOCK detect signal from the RF module. If this module goes out of
lock, then the radiate control logic circuit provides a signal to the power supply to turn off the
+12.5 VDC supply (+22 VDC for 1.7 GHz) to the IPA and RFA, causing the transmitter to stop
radiating. Remote control functions are implemented in this circuitry.
Metering and Status
The Metering and Status circuitry on the Audio/Power Supply board conditions the various
system parameter samples for accurate meter indications, and drives the status LEDs on the
front panel. Remote status indications are also provided by this circuitry.
Power Supply (AC)
The Power Supply section of the Audio/Power Supply board converts any of four AC input
voltages (100, 120, 220, 240 VAC) into the five regulated DC voltages required for the operation
of the transmitter. The outputs are +15, -15, and +5 VDC for most of the system electronics. A
high current +12.5 VDC (+22 VDC for 1.7 GHz) supplies the RFA. A regulated -12 VDC supply
powers the crystal ovens in the 1st LO and the FMO/Synthesizer.
Power Supply (DC Option)
Transmitters configured for DC operation only (±12, ±24, and ±48 VDC) have internal switching
power supplies to provide the system voltages. These supplies can be isolated from chassis
ground to allow negative DC source operation. The RFA supply may be powered directly from the
battery, depending on the primary DC source.
PCL6000
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System Characteristics
Multichannel Operation (Option)
The Channel Control board is pre-programmed to select the transmitter carrier frequency by
controlling the FMO/synthesizer (in the RF module) and the modulation compensation circuitry
(located on board). This board has facilities for over-ride of the pre-programmed channel
frequencies (Channel 0 operation). Remote control of the channel selection is also provided on
this board through access to the back panel. Channel selection and display is accessed by the
user through the front panel. The Channel Control board connects to the RF module via a 25-pin
D ribbon cable. The RF module must be compatible for multichannel operation. Please contact
the factory for field retrofit of the system.
1.4.2 PCL6020, PCL6030, PCL6060 Receivers
The PCL6000 System has three receivers which are designed for different RF environments. The
PCL6060 and PCL6030 are triple-conversion receivers which provide maximum out-of-band and
adjacent channel protection. The PCL6060 exhibits superior front end performance in the
presence of extremely strong RF fields, as it uses modules from the time-proven Moseley
PCL606 STL. The PCL6020 is a dual-conversion receiver that provides maximum performance in
all but the most demanding environments. Both systems are switchable to support mono or
composite operation. The receivers are modular in construction and operation, and the system
description given below follows the signal flow through the various modules.
Refer to Figures 1-2a/b, 1-3a/b, and 1-4a/b, Receiver Block and Level Diagrams. Assembly
drawings and schematics for the complete receiver systems and for their modules are located in
Section 7.
Preselector/Preamplifier (950 MHz, PCL6020/6030)
The Preselector/Preamplifier is located in the RF module. The antenna input signal is first passed
through the preselector filter, which is a pcb-mounted helical bandpass filter with very low
insertion loss. The output of the preselector filter is fed to the preamplifier providing low-noise
gain. The postselector filter provides further filtering as well as image noise rejection.
Preselector Filter (950 MHz, PCL6060)
The antenna input signal is first passed through the Preselector Filter, which is a five-element,
interdigital bandpass filter with a 20 MHz bandwidth and maximum insertion loss of 1.5 db. This
filter has superior rejection due to its mechanical implementation.
Preamp/1st Mixer (950 MHz, PCL6060)
The output of the Preselector Filter is fed to the Preamp/1st Mixer module. This module
incorporates an adjustable PIN diode attenuator for user-adjustable front end protection. The lownoise, high-intercept point preamplifier is followed by the image noise filter. The 1st Mixer downconverts the carrier to the first IF (70 MHz) by mixing with the 1st LO and is buffered for
transmission to the Double Converter/LO3 module.
Preselector Filter (220–450 MHz)
The antenna input signal is first passed through the Preselector Filter, which is a three-element,
helical bandpass filter with an 8 MHz bandwidth and maximum insertion loss of 1.5 db. This filter
has superior rejection due to its mechanical implementation.
Preselector Filter (1.7 GHz)
The antenna input signal is first passed through the Preselector Filter, which is a five-element,
interdigital bandpass filter with a 20 MHz bandwidth and maximum insertion loss of 1.5 db. This
filter has superior rejection due to its mechanical implementation.
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1-9
Mixer (PCL6020/6030)
The Mixer is located in the RF module when configured as a PCL6020 or PCL6030. The carrier
frequency is mixed with the 1st Local Oscillator (LO1) signal to provide down conversion to the
first intermediate frequency (IF) of 70 MHz (nominal). The IF signal is buffered to overcome mixer
conversion loss.
1st Local Oscillator (950 MHz)
The receiver 1st LO is identical to the transmitter 1st LO referenced in section 1.4.1.
1st Local Oscillator (330/450 MHz)
The receiver 1st LO is identical to the transmitter 1st LO referenced in section 1.4.1.
1st Local Oscillator (220 MHz)
The receiver 1st LO is identical to the transmitter 1st LO referenced in section 1.4.1.
1st Local Oscillator (1.7 GHz)
The 1st Local Oscillator (LO1) section of the RF module consists of an oven controlled crystal
oscillator, a doubler, and a step recovery diode (SRD) multiplier. The oscillator operates at 102
MHz (nominal). The resultant multiplication factor of the LO is X16. The output (1632 MHz) is
externally filtered and then attenuated before being applied to the upconverter mixer. A level
detector provides front panel metering information. The output power is approximately +10 dBm.
2nd Local Oscillator
The 2nd Local Oscillator (LO2) is located in the RF module and is identical to the transmitter FMO
except for operating frequency and modulation capability. LO2 consists of a 70–90 MHz
ultralinear, very low noise VCO which is phase locked to a crystal-controlled reference oscillator.
The phase lock loop contains the frequency programming switches which allow the synthesizer to
be changed in frequency steps of 25 kHz. The RF output of LO2 is filtered to attenuate any
harmonics. The output level is approximately +7 dBm.
Double Converter/LO3 (PCL6030/6060)
The Double Converter/LO3 module provides the second and third down-conversions of the IF
signal and establishes the selectivity characteristics of the receiver. The second IF is at 10.7 MHz
and two phase-linear ceramic filters are used to provide system selectivity (composite or
monaural). The second of these two filters is switch-selectable to allow the user to minimize
distortion in those situations where the added selectivity is not necessary.
The 3rd Local Oscillator (LO3) is located in the Double Converter/LO3 module and is used for the
third down-conversion to 3 MHz. LO3 is a crystal oscillator operating at 13.7 MHz. The output
level is +7 dBm.
FM Demod (PCL6030/6060)
The FM Demod module has three major functions. One is to extract the baseband information
from the FM carrier. The second function is to generate the RF signal strength voltage that is
applied to the meter in the RF LEVEL position, and the third is to establish the mute or squelch
threshold of the receiver. The signal is first passed through a 3 MHz IF amplifier and a phaselinear 3 MHz bandpass filter. At this point, the signal is split and sent to both the FM demodulator
and the log IF amplifier.
For FM demodulation, the signal runs through a four-stage limiting IF amplifier, the output of
which passes on to the ultra-linear pulse-counting FM demodulator. This demodulator is
extremely wideband and adjustment free. The output of the FM demodulator is low-pass filtered
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System Characteristics
and sent to a low noise baseband amplifier, which raises the signal level to a useful system level.
The output is then sent to the Audio/Power Supply board.
IF Demod (PCL6020)
The IF Demod module provides down conversion to the second IF (10.7 MHz), sets system
selectivity in the second IF, extracts the baseband information from the carrier, provides the
logarithmic RF signal strength voltage for metering, and establishes the mute threshold point of
the receiver.
Baseband Processor
The main functions of the Baseband Processor circuitry on the Audio/Power Supply board are to
split the baseband signal into two frequency bands: 30 Hz to 80 kHz for composite, and 85 kHz to
200 kHz for MUX. In the extended baseband version of the PCL6000, the composite band spans
30 Hz to 110 kHz, and the MUX passband extends from 120 kHz to 200 kHz. For mono, the split
is 30 Hz to 15 kHz for audio and 28–85 kHz for MUX. This module also contains the FET mute
switch, which is controlled by the mute comparator output of the Mute and Transfer circuitry. The
signal is then passed through a high-frequency amplitude corrector, which compensates for the
baseband high-frequency roll-off caused by the 10.7 MHz IF bandpass filters, to restore proper
amplitude response to the baseband signal.
The signal is then fed to an audio amplifier and an 80 kHz (composite) or 15 kHz (mono) lowpass filter. The output of this filter passes through an active group delay equalizer, which
compensates for the group delay variations of the low-pass filter. This signal is then buffered by
an output amplifier that provides 3.5 Vp-p output for 100% modulation. The output of the highfrequency amplitude corrector is also passed to a MUX high-pass filter (80 kHz composite, 22
kHz mono) and then goes to the MUX amplifier. The output of this amplifier drives a MUX lowpass filter (200 kHz composite, 85 kHz mono) which is then buffered to yield the MUX nominal
output of 1.5 Vp-p.
Mute and Transfer
The Mute and Transfer circuitry located in the Audio/Power Supply board mutes the audio signal
during periods of insufficient RF signal strength or for transferring operation to another receiver.
Metering and Status
The Metering and Status circuitry, located in the Audio/Power Supply board, conditions the
metering samples and drives the status LED on the front panel and the front-panel meter.
Remote status functions are also provided.
Power Supply (AC)
The Power Supply section of the Audio/Power Supply board converts any of four AC input
voltages (100, 120, 220, 240 VAC) into the four regulated DC voltages required for the operation
of the receiver. The outputs are +15, -15, and +5 VDC for the most of the system electronics. A
regulated -12 VDC supply powers the crystal ovens in the 1st and 2nd LO.
Power Supply (DC Option)
Receivers configured for DC operation only (±12, ±24, and ±48 VDC), have internal switching
power supplies to provide the system voltages. These supplies can be isolated from chassis
ground to allow negative DC source operation.
Multichannel Operation (Option)
The Multichannel Control board is pre-programmed to select the receiver frequency selection by
controlling the LO2/synthesizer (in the RF module). This Control board has facilities for over-ride
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Moseley PCL6000
1-11
of the pre-programmed channel frequencies (Channel 0 operation). Remote control of the
channel selection is also provided on this board through access to the back panel.
Channel selection and display is accessed by the user through the front panel. The Channel
Control board connects to the RF module via a 25-pin D ribbon cable. The RF module must be
compatible for multichannel operation. Please contact the factory for field retrofit of the system.
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System Characteristics
Figure 1-1a PCL6010 Transmitter Block and Level (92A1319 R: A Sheet 1 of 2)
PCL6000
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Moseley PCL6000
1-13
Figure 1-1b PCL6010 Transmitter Block and Level (92A1319 R: A Sheet 2 of 2)
PCL6000
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System Characteristics
Figure 1-2a PCL6020 Receiver Block and Level (92A1320 R: A Sheet 1 of 2)
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Moseley PCL6000
1-15
Figure 1-2b PCL6020 Receiver Block and Level (92A1320 R: A Sheet 2 of 2)
PCL6000
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System Characteristics
Figure 1-3a PCL6030 Receiver Block and Level (92A1327 R: A Sheet 1 of 2)
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Moseley PCL6000
1-17
Figure 1-3b PCL6030 Receiver Block and Level (92A1327 R: A Sheet 2 of 2)
PCL6000
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System Characteristics
Figure 1-4a PCL6060 Receiver Block and Level (92A1331 R: A Sheet 1 of 2)
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1-19
Figure 1-4b PCL6060 Receiver Block and Level (92A1331 R: A Sheet 2 of 2)
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System Characteristics
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2-1
2 Installation
2.1 Unpacking
The PCL6000 transmitter and receiver should be carefully unpacked and inspected for shipping
damage. Should inspection reveal any shipping damage, visible or hidden, immediately file a
claim with the carrier. Keep all packing materials at least until the performance of the system is
confirmed. If possible, save all packing materials in case the unit must be shipped in the future.
We recommend removal of the top covers of both the transmitter and receiver for a brief
inspection of the internal components. Verify that assemblies and cables are mechanically
secure. Check also for socketed components that may have been jarred loose or partially
dismounted. This is a good time to familiarize yourself with the various assemblies and modules,
using the Block and Level diagrams (Figures 1-2 through 1-4) and the drawings of Section 7.
After the internal inspection, replace the top covers.
CAUTION:
Do not attempt any adjustments of any kind until the nature of each adjustment is understood.
Do not apply power to the receiver until the procedure in Section 2.2.1 is completed.
Do not apply power to the transmitter until the procedure in Section 2.2.1 is completed and a
proper load is connected to the RF output.
Do not remove the covers on the transmitter RF Amplifier module.
2.2 Power
2.2.1 AC Line Voltage Selection
WARNING
Failure to ground the third lead of the input power cord may result in hazardous
shocks to personnel.
The transmitter and receiver each have the capability of operating at one of four nominal AC
power source voltages: 100, 120, 220, or 240 VAC, 50–60 Hz. The units are shipped for 120 VAC
operation, unless otherwise specified.
Select the operating voltage by programming the line filter/fuse holder on the back panel as
shown in Figure 2-1. The desired voltage should be visible when the voltage selection card is
inserted. If operating voltage is changed, change the fuse in accordance with Table 2-1.
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Installation
Figure 2-1
Line Filter/Fuse Holder Programming
(Detail shows 100 VAC operation selected)
Table 2-1
Transmitter and Receiver Fuse Settings
Transmitter Fuse
Receiver Fuse
(Slow Blow)
(Slow Blow)
100 VAC
2A
1A
120 VAC
2A
1A
220 VAC
1A
0.5 A
240 VAC
1A
0.5 A
Line Voltage
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2-3
2.2.2 DC Option
For DC operation, verify the correct fuse is installed. Table 2-2 applies to most DC units. Due to
possible technical issues at the factory, ALWAYS replace the fuse with the same type and rating
of fuse installed by the factory.
Table 2-2
Transmitter and Receiver Standard DC Fuse Values
Transmitter Fuse
Receiver Fuse
(Slow Blow)
(Slow Blow)
±12 VDC
5A
3A
±24 VDC
2A
2A
±48 VDC
1A
1A
Input Voltage
2.3 Pre-installation Checkout
While the user has both the transmitter and receiver at the same location, we suggest that a preinstallation checkout of the system be performed before mounting the equipment in racks
separated by many miles. Figure 2-2 shows one of the several possible bench test setups.
Minimum Equipment to Perform Bench Test
Instrument Type
Suggested Model
Critical Specifications
RF Wattmeter
Bird 43 or equivalent
measurement range 5–15 watts
Fixed Attenuator
Philco 662A-30 or
Sierra 661A-30
30 dB, 1 GHz
50 Ohms, 20 Watts
Adjustable Attenuator
Kay Elemetrics
Model 432D
0–100 dB
Audio Signal Generator
Tektronix SG505
or equivalent
low-distortion
Audio Distortion Analyzer
Tektronix AA501
or equivalent
PCL6000
602-13375-01
2-4
Installation
MONO
(BALANCED)
AUDIO
GENERATOR
L
STEREO
R
COMP
GENERATOR
STL
RF
TRANSMITTER
SUBCARRIER
GENERATOR
RF
MUX
WATTMETER
50 OHM
DUMMY LOAD
&
ATTENUATOR
MONO
(BALANCED)
AUDIO
ANALYZER
L
R
STEREO
COMP
VARIABLE
ATTENUATOR
DEMODULATOR
STL
RECEIVER
SUBCARRIER
DEMODULATOR
MUX
(MD1024)
Figure 2-2
Typical Bench Test Setup
More extensive testing can be accomplished using a stereo generator and demodulator
combination and/or a sub-carrier generator and demodulator combination.
CAUTION
Always operate the transmitter terminated into a proper 50-ohm load.
Always attenuate the signal into the receiver to less than 3000 µV (Approximately 75 dB
attenuation between the transmitter and receiver).
Observe these precautions when performing any bench test. Otherwise the transmitter
final transistor may be destroyed or the receiver preamplifier transistors may be
damaged.
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Moseley PCL6000
2-5
Bench Test Procedure
With the wattmeter and dummy load connected to the transmitter, apply AC power to the receiver.
The OPERATE LED will be red, indicating that there is no RF.
Apply AC power to the transmitter and place the OPERATE/STANDBY switch in the OPERATE
position. “AFC LOCK” and “RADIATE” will be red for several seconds and then turn green.
Observe that the wattmeter will indicate between 5 to 15 watts (depending on the frequency band
of operation) and that the transmitter meter will provide readings of FWD PWR. A brief period
after “RADIATE” becomes green, “OPERATE” on the receiver will change from red to green. The
RF LEVEL meter position on the receiver may be selected to determine the strength of the RF
signal applied to the receiver. Adjust the variable attenuator until an input signal strength of
approximately 1000 µV is indicated. It should be mentioned that in any bench testing where the
transmitter and receiver are in close proximity, there can be sufficient RF leakage from the cables
to render computations of applied signal strength impractical based upon power and attenuation
data.
Apply a 3.5 Vp-p signal (1.237 VRMS) from the audio signal generator at 400 Hz to the composite
input of the transmitter. “PGM LEVEL” at the transmitter and receiver meters may be selected
and should indicate 0 on the dB scale. The output voltage from a composite output of the receiver
can be fed to an audio analyzer. The output voltage should be approximately 3.5 Vp-p (1.237
VRMS). The audio input signal may be removed and the broadband signal-to-noise ratio (SNR)
determined:
SNR = 20log
(RMS voltage with modulation )
(RMS voltage without modulation )
(Note: Demodulated stereo SNR will be approximately 12 dB greater than broadband SNR.)
While this concludes the basic bench test of the units, the user may want to run further
experiments to become familiar with the system. Sections 3, 4, and 5 should be consulted for a
thorough understanding of the STL system before proceeding with any higher level testing. It
must be noted that any testing for stereo performance must be accomplished with a very high
quality stereo generator and stereo demodulator combination. The stereo generator and
demodulator combination should be tested back-to-back to determine their performance
independently of the STL link.
2.4 Rack Installation
The PCL6000 units are designed for mounting in standard rack cabinets, preferably between
waist and shoulder height. The transmitter and receiver have mounting holes for Chassis Trak C300-5-1-14 chassis rack slides. If the rack will accept chassis rack slides, their use is
recommended. If chassis rack slides are used, be sure to leave at least a 15-inch service loop in
all cables to the equipment.
When mounting the transmitter or receiver in a rack, the unit must have an unobstructed free flow
of cooling air across the rear panel. Continued operation in a confined environment can cause the
ambient temperature to exceed specification, resulting in reduced life or catastrophic failure.
When a PCL6000 Receiver is used with a PCL606, PCL600, PCL505 or PCL303 receiver, a
transfer panel (such as a TPR-2) must be used to accomplish automatic switchover, and should
be mounted between the two receivers. Receiver automatic switchover interconnections are
detailed in Section 2.9 (Main/Standby Interconnect).
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Installation
When two transmitters are in a system at a site, an automatic transfer panel such as the TPT-2
should be mounted between them. The TPT-2 will allow interconnection of a PCL6000 with
another PCL6000, PCL600, PCL606, PCL505, or PCL303 transmitter and can provide automatic
switchover in the event of a detectable failure in the transmitter as shown in Section 2.9.1
(Transmitter Interconnect).
2.5 Antenna Installation
The installation of the antennas and associated feed lines determines to a large extent the longterm reliable operation of the STL. Experience has indicated that a reasonably clear path having
a 0.6 Fresnel zone clearance along with good feed-line installation results in a highly predictable
signal level at the receiver. The appendix contains a series of instructions, calculation sheets,
typical gain and loss characteristics, and nomographs to enable the received signal level to be
predicted. Since the PCL6000 has a signal strength meter, it is possible to determine the quality
of the antenna installation and path compared to the calculations.
Experience at 960 MHz has indicated that for reliable year-round operation with a predominantly
overland path and 0.6 Fresnel zone clearance, a 20 dB fade margin should be used. At least a 25
dB fade margin should be allowed if the path is over water or flat terrain with little vegetation.
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Moseley PCL6000
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2.6 Transmission Cables
The transmission cable between antenna and transmitter or receiver should be coaxial cable
whose loss characteristics are known. Typical quality low-loss foam dielectric lines such as
Andrew LDF4-50, a 0.5 inch diameter cable, has a 2.4 dB loss per 100 feet at 950 MHz. This
cable will generally be adequate where the total cable run (at both transmitter and receiver) is
less than 300 feet and there is a good transmission path of less than 10 miles.
When the total transmission cable length exceeds 300 feet, an obstructed or grazing path occurs,
or the path length exceeds 10 miles, a lower loss cable such as Andrew LDF5-50, a 7/8 inch
diameter cable with a loss of 1.4 dB per 100 feet, is recommended.
To reduce system losses, it is important to select type N connectors that are designed for the type
of transmission cable used in the system. The connectors must be installed in accordance with
the manufacturer's recommendations. It may take only one improperly installed connector to
reduce the received signal strength sufficiently to provide only marginal system performance.
Reasonable care should be exercised during the installation of the transmission cable. Never put
a sharper bend radius in the cable than recommended by the manufacturer. Too sharp a bend
can cause internal cable damage that is not observable on the outside of the cable. This damage
can result in excessive loss in the cable. Since the higher quality transmission cables are
relatively inflexible, Moseley Associates has several short “pigtail” assemblies available. These
pigtails are designed to attach to the ends of the transmission cable and allow movement of the
equipment or antenna with less chance of damaging the transmission cable or the connectors on
the equipment. These pigtails and appropriate connectors are available in installation kits for the
more popular types of transmission cable.
Should it be desired to mount the antenna on a series-fed standard broadcast tower, the required
isolation can be obtained with the installation of a Moseley Associates Isocoupler at the base of
the series-fed antenna. Isolation at standard broadcast frequencies is high, and the isocoupler
introduces only approximately 1.5 dB loss at the STL frequency.
Figure 2-3 shows details of a typical PCL6000 site installation.
PCL6000
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Installation
Figure 2-3
Typical PCL6000 Site Installation
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2-9
2.7 Program and Multiplex Installation —
Transmitter
Figure 2-4 depicts the typical interconnection of a PCL6000 as would normally be found at the
studio. The left and right program material is first passed through an automatic gain control (AGC)
unit to establish the nominal system levels. This is followed by a frequency-conscious audio
limiter to prevent over-modulation of the system as the result of the normal pre-emphasis curve
used in FM broadcasts.
It is highly desirable that the gain control or limiting units for each channel be interconnected so
that any processing that occurs on one channel is performed in the same manner on the other
channel.
Figure 2-4
Transmitter PGM and MUX Interconnect — Composite
PCL6000
602-13375-01
2-10
Installation
The limiter outputs are then fed to a stereo generator for conversion of the left and right channels
into the standard FM composite baseband signal. The composite signal is then fed into the
composite input of the PCL6000. The standard composite signal is unbalanced, 3.5 Vp-p for 100
percent modulation. BNC connectors with type RG-58 A/U coaxial cable are generally used for
the interconnection.
CAUTION Never over-modulate the STL transmitter, as this will cause increased distortion in the
received signal and, possibly, interference to other users in the STL band.
The secondary program audio is generally passed through an AGC stage and/or a frequency
conscious limiter into a subcarrier generator with a center frequency of 185 kHz (67 kHz for
mono). The subcarrier for the secondary program audio is fed to the PCL6000 MUX 2 subcarrier
input with an unbalanced shielded cable (RG-58 A/U typical) with BNC connectors. An input level
of 1.5 Vp-p corresponds to a main carrier deviation of 7.5 kHz (6 kHz mono) by the MUX 2
subcarrier.
Where a control subcarrier is desired, a subcarrier frequency of 110 kHz (26 kHz for mono) is
typically used. The modulated subcarrier may be generated internally in the remote control
equipment as in the case of the Moseley MRC series. In any case, the control subcarrier is
applied to the MUX 1 input on the PCL6010 transmitter at 1.5 Vp-p using BNC connectors on
coaxial cable (RG-58 A/U typical). This signal will produce a main carrier deviation of 5 kHz (4
kHz mono) by the MUX 1 subcarrier.
The composite and multiplex inputs into the PCL6010 transmitter are wideband inputs. It is
assumed that the equipment supplying signals to be fed into the transmitter contain the band
limiting filters necessary to limit the signals to the spectrum for the intended use, i.e., 53 kHz for
stereo composite, 110 kHz for control subcarrier (26 kHz ±3 mono), and 185 kHz (67 kHz ±1.10
mono) for secondary program audio.
If the external equipment generates any spurious signals, these signals will be accepted by the
transmitter and passed to the receiver. Any spurious signals may cause intermodulation among
the composite and subcarrier information, and may increase the occupied bandwidth to the extent
that interference will be experienced by neighboring users in the STL band.
PCL6000
602-13375-01
Moseley PCL6000
2-11
Figure 2-5 shows the connections for a mono setup. The same cautions and considerations apply
as for composite. The mono input has a selectable low-pass filter for bandwidth limiting.
Figure 2-5
Transmitter PGM and MUX Interconnect — Mono
PCL6000
602-13375-01
2-12
Installation
2.8 Program and Multiplex Installation — Receiver
At the outputs of the PCL6000 receivers, the baseband output of the IF demod is split and filtered
into two bands. The audio outputs are from 30 Hz to approximately 85 kHz (15 kHz mono). The
multiplex outputs are bandpass filtered to pass the frequency range of 100 kHz to 200 kHz (22
kHz to 85 kHz mono).
Figures 2-6 and 2-7 depict a typical interconnection of a PCL6000 receiver at the remote
transmitter site. The unbalanced output (3.5 Vp-p composite, +10 dBm mono) is interconnected
to the wideband input of the transmitter with coaxial cable (RG-58 A/U typical) with BNC
connectors, or twisted shielded pair for mono.
Figure 2-6
Receiver PGM and MUX Interconnect — Composite
PCL6000
602-13375-01
Moseley PCL6000
2-13
Figure 2-7
Receiver PGM and MUX Interconnect — Mono
The secondary program audio (on the STL 185 kHz subcarrier) is fed to the subcarrier
demodulator. The baseband audio is passed to a subcarrier generator at 67 kHz, the normal SCA
program carrier, which in turn is fed to the main transmitter multiplex input. The multiplex outputs
may also be fed to the control subcarrier demodulator for use by the control system. Some control
systems, such as the Moseley MRC series, have their own internal subcarrier demodulation
capability, and an external demodulator is not required. Note that since both multiplex outputs
contain the same 85 kHz to 200 kHz (20 kHz to 85 kHz mono) spectrum, the subcarrier
demodulators are required to further filter the spectrum as required for their individual purposes.
2.9 Main/Standby Interconnect
The PCL6000 transmitter and receiver can be interfaced with other PCL6000, PCL606, PCL505,
or PCL303 systems to form a redundant backup system that provides for automatic changeover
between equipment in the event a detectable failure occurs. The Moseley model TPT-2 is used to
accomplish automatic switchover for transmitters in all combinations. The model TPR-2 (Transfer
Panel Receiver) is required on certain receiver combinations.
PCL6000
602-13375-01
2-14
Installation
2.9.1 Transmitter Interconnect
When two transmitters are interconnected with a TPT-2 to form a main/standby pair, the
composite and subcarrier generator output is routed to each transmitter in parallel. The RF output
of each transmitter is routed to the respective RF input on the TPT-2. The transmission cable to
the antenna is connected to the antenna type N connector of the TPT-2. Figures 2-8 and 2-9
detail the interconnection of these signals. The remote connector between the transmitters and
the TPT-2 should be wired as shown in Table 2-3. Section 2.10 gives pin assignments for for the
Transmitter I/O Remote Connector.
NOTE
For proper operation with a TPT-2, both transmitter RADIATE/ STANDBY switches should be in
the STANDBY position.
Table 2-3
Remote Connector Wiring Guide
PCL6010*
TPT-2
PCL606
PCL505
PCL303
9-pin D
9-pin round
A
J1-2
B
A10-J1-B
J1-B
J403-F
B
J1-4
D
A10-J1-D
J1-D
J403-C
C
J1-3
C
A10-J1-C
J1-C
J403-D
GND
J1-1
A
A10-J1-A
J1-A
J403-A
∗ “9-pin D” and “9-pin round” refer to two types of rear panel TX RMT connectors. These are
shown in Figure 2-13. The current standard is the 9-pin D connector. Older PCL6010’s have the
9-pin round connector. An appropriate mating connector is included with all units when shipped.
PCL6000
602-13375-01
Moseley PCL6000
2-15
Figure 2-8
Main/Standby Transmitter Interconnect — Composite
PCL6000
602-13375-01
2-16
Installation
Figure 2-9
Main/Standby Transmitter Interconnect — Mono
PCL6000
602-13375-01
Moseley PCL6000
2-17
2.9.2 Receiver Interconnect — Other STL Receivers
The PCL6000 receivers may be used with other Moseley STL receivers, such as the PCL505 and
PCL303, may be used in a main/standby configuration, provided that a TPR-2 is used to perform
the switching between the two receivers. A typical installation is detailed in Figure 2-10. Note that
only one multiplex output can be used from the receivers; however, there are two parallel
multiplex outputs on the TPR-2 to provide the control and secondary audio multiplex outputs.
Figure 2-10
Main/Standby Receiver Interconnect — Other STL Receivers
PCL6000
602-13375-01
2-18
Installation
2.9.3 Receiver Interconnect — PCL6000/606/600 Composite
PCL6000, PCL606, and PCL600 receivers used in a main/standby configuration can be
interconnected to perform automatic switchover if detectable failure occurs in the on-line
receivers. As shown in Figure 2-11, the antenna is routed to each receiver through a power
divider such as the Moseley model PD-1000. The use of a power divider is recommended so that
the impedance as seen by each receiver is approximately 50 ohms.
Figure 2-11
Main/Standby Receiver Interconnect — PCL6000 Composite
The composite and mux outputs are paralleled using a BNC Tee connector. This is permissible
since the outputs are switched internal to the receiver. Only one of the receivers at a time will
have any output. The interlock control is achieved by first interconnecting the ground (GND) on
the two receivers. The XF R IN of each receiver is wired to XFR OUT of the other receiver. GND,
XFR IN, and XFR OUT are located on the barrier strip on the rear of the receivers.
PCL6000
602-13375-01
Moseley PCL6000
2-19
2.9.4 Receiver Interconnect — PCL6000/606/600 Mono
PCL6000, PCL606, and PCL600 receivers used in a main/standby configuration can be
interconnected to perform automatic switchover if a detectable failure occurs in the on-line
receivers. As shown in Figure 2-12, the antenna is routed to each receiver through a power
divider such as the Moseley model PD-1000. The use of a power divider is recommended so that
the impedance as seen by each receiver is approximately 50 ohms.
The mono and mux outputs are paralleled using a BNC Tee connector. This is permissible since
the mono and multiplex outputs are switched internal to the receiver. Only one of the receivers at
a time will have any output. The interlock control is achieved by first interconnecting the ground
(GND) on the two receivers. Then, XFR IN of each receiver is wired to XFR OUT of the other
receiver. GND, XFR IN, and XFR OUT are located on the barrier strip on the rear of the receivers.
Figure 2-12
Main/Standby Receiver Interconnect — PCL6000 Mono
2.10
Remote Control of the STL Transmitter
The PCL6010 transmitter has been designed to be operated by remote control. Radiate/standby
control capability, as well as metering outputs for power and AFC, are built in. Figure 2-13 shows
PCL6000
602-13375-01
2-20
Installation
the back panel I/O connector schematic that is required for remote control interface with the
transmitter. Figure 2-13a is the pin-out for revision A transmitters using the circular 9-pin
connector. Figure 2-13b is the pin-out for revision B and later transmitters using the 9-pin D
(female) connector.
Figure 2-13a
Transmitter I/O Remote Connector Pin-Out (Rev. A)
"TX RMT"
1 GND
2 RMT FWD PWR(1)
3 RMT MODE
4 RMT RADIATE CTL
5 GND
6 RMT FWD PWR(2)
1
2
3
4
5
7 GND
6
7
8
9
8 RMT AFC LVL
9 RMT RADIATE OVERIDE
(MD1113)
Figure 2-13b
Transmitter I/O Remote Connector Pin-Out (Rev. B or Later)
PCL6000
602-13375-01
Moseley PCL6000
2.11
2-21
Multichannel Remote Interconnect (Option)
The PCL6000MC (Multichannel) is equipped with a CHA NNEL CONTROL connector located on
the back panel of both transmitter and receiver. The 9-pin D (male) connector pin-out is shown in
Figure 2-14.
Figure 2-14
Transmitter Channel Control Connector Pin-Out
The REMOTE ENABLE line requires a contact closure to GND or logic level 0 (low) to enable the
system for remote operation. The remote logic is ACTIVE HIGH with internal pull-up resistors and
follows a standard BCD input standard utilizing contact closure or TTL logic levels. Table 2-4
shows the truth table for channel selection.
PCL6000
602-13375-01
2-22
Installation
Complete operating instructions for the Multichannel System are found in Section 3.
Table 2-4
Channel Control Remote Interface Logic
REM
ENABLE
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
D3
D2
D1
D0
x
x
x
x
x
x
x
x
o
o
o
o
o
o
o
o
x
x
x
x
o
o
o
o
x
x
x
x
o
o
o
o
x
x
o
o
x
x
o
o
x
x
o
o
x
x
o
o
x
o
x
o
x
o
x
o
x
o
x
o
x
o
x
o
CHANNEL
o = open circuit; x = gnd contact closure
PCL6000
602-13375-01
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Moseley PCL6000
3-1
3 Operation
3.1 Introduction
This section describes the controls and adjustments of a PCL6000 system that the user will
encounter in normal operation and initial setup. Front panel metering and controls, as well as rear
panel connectors, are shown and described. Standard single channel STL and Multichannel
configurations are discussed and the appropriate panel diagrams can be found in the
corresponding figures.
3.2 Transmitter Operational Controls
3.2.1 Transmitter Front Panel
The PCL6010 transmitter front panel (standard) is depicted in Figure 3-1. The meter functions
and scales are described in Table 3-1. The top scale is calibrated in dB; below is a 0 to 25 linear
scale. On the bottom is a center arc for relative indications. The meter is an absolute value peakreading type with fast ballistics, since the purpose of the meter is to observe the peak values of
modulation which affect the deviation of the transmitter.
AFC LVL
PCL 6010 Aural STL Transmitter
OPERATE
LO LVL
5
10
AFC LOCK
20
3
5
0
STANDBY
10
IPA LVL
PA CURRENT
0
15
20
+5V
FWD PWR
+12V
REFL PWR
-15V
PGM LVL
+15V
MUX LVL
RADIATE
25
(MD1137)
Figure 3-1
PCL6010 Transmitter Front Panel (Standard)
The two transmitter status LEDs are red/green bi-color LEDs. “AFC LOCK” is green when the
FMO Synthesizer has achieved a lock condition. When “AFC LOCK” is red, it indicates that an
unlock condition exists. This inhibits any radiation of RF power, resulting in “RADIATE” being red.
When power is initially applied to the transmitter, it is normal for “AFC LOCK” to be red for several
seconds.
“RADIATE” will be green when the transmitter is supplying RF power and red when not supplying
RF power. “RADIATE” is controlled by the internal interlock controls, the RADIATE/STANDBY
switch, and any external logic associated with main/standby operation.
The OPERATE/STANDBY switch functions as an on/off switch for the RF power output. In the
OPERATE position, the RF power will be on, provided all of the internal interlocks are enabled. In
the STANDBY position, transmitter operation is controlled by external switching control and the
internal interlocks.
PCL6000
602-13375-01
3-2
Operation
Table 3-1
Transmitter Meter Functions and Scales
Function
Scale
Units
Notes
FWD PWR
dB
dB
RFA Forward Power in dB
0 dB = 100% power output
PGM LVL
dB
dB
Peak Program Meter
0 dB = 3.5 Vp-p @ 100% modulation
MUX LVL
Linear
kHz
Subcarrier deviation
REFL PWR
dB
dB
RFA Reflected Power in dB
0 dB = 100% reflected power
-10 dB to -20 dB = safe
AFC LVL
Center Arc
Relative
AFC voltage
(relative level–calibrated to center)
LO LVL
Center Arc
Relative
Local Oscillator
(relative level–calibrated to center)
IPA LVL
Center Arc
Relative
Intermediate Power Amplifier
(relative level–calibrated to center)
PA CURR
Linear
X 0.1 Amps
RFA final stage current
+5 V
Linear
Volts
Power Supply
+12 V
Linear
Volts
RFA supply, STBY = 1.5 VDC
+15 V
Linear
Volts
Power Supply
-15 V
Linear
Volts
Power Supply
3.2.2 Transmitter Rear Panel
The PCL6010 transmitter rear panel (standard AC power) is depicted in Figure 3-2. All of the
program inputs (COMP/MONO) and MUX inputs are shown. The RF power output is a type N
connector. TX REMOTE is used for external remote operation and standby/transfer
interconnections. CHNL REMOTE is used for the Multichannel option. All of the necessary
interconnections are found in Section 2. The fused AC input is line voltage programmable (see
Figure 2-1).
PCL6000
602-13375-01
Moseley PCL6000
COMP
+
MONO
3-3
-
TX REMOTE
MUX 2
CHNL REMOTE
FUSE
MUX 1
FCC ID: CSU9WKPCL6010
MOSELEY ASSOCIATES, INC.
ASSEMBLED IN USA
"This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions.
(1) This device may not cause harmful interference
(2) This device must accept any interference received
including interference that may cause undesired
operations."
(MD1138)
Figure 3-2
PCL6010 Transmitter Rear Panel
The PCL6010 transmitter rear panel (DC power option) is depicted in Figure 3-3. The DC input
panel is marked in the factory for the DC input voltage, the internal ground configuration (NEG
GND for positive DC input, ISO GND for negative or positive DC input), and fuse rating. See
Section 4.2 for further technical information concerning the internal DC configuration.
COMP
+
MONO
-
MUX 1
TX REMOTE
MUX 2
CHNL REMOTE
FCC ID: CSU9WKPCL6010
MOSELEY ASSOCIATES, INC.
ASSEMBLED IN USA
"This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions.
(1) This device may not cause harmful interference
(2) This device must accept any interference received
including interference that may cause undesired
operations."
FUS
SE
E
U
F ESUF
(MD1135)
Figure 3-3
PCL6010 Transmitter Rear Panel (DC Option)
3.2.3 Multichannel Transmitter Operation
The Multichannel transmitter is preprogrammed for up to 16 channels of operation. The
frequencies are predetermined by the customer and are factory set at time of manufacture. The
PCL6010 transmitter front panel for the Multichannel option is depicted in Figure 3-4. The front
panel display indicates the CHANNEL number that is currently active. A label on the rear panel
lists the particular channel assignment frequencies. The front panel SELECT knob enables the
user to change channels as necessary. The transmitter and receiver are matched with respect to
channel assignment.
AFC LVL
PCL 6010 Aural STL Transmitter
Multichannel System
OPERATE
LO LVL
5
10
3
0
STANDBY
10
RMT
0
20
5
IPA LVL
PA CURRENT
15
20
+5V
FWD PWR
+12V
REFL PWR
-15V
PGM LVL
+15V
MUX LVL
CHANNEL
SELECT
AFC LOCK
RADIATE
25
(MD1132)
Figure 3-4
PCL6010 Transmitter Front Panel (Multichannel Option)
PCL6000
602-13375-01
3-4
Operation
3.2.3.1 User Programmable “CHANNEL 0”
CHANNEL 0 is provided as a user-programmable channel for backup or testing purposes. This
channel is set in the factory to duplicate CHANNEL 1. To set a new channel frequency, see
section 5.3 (Alignment Procedures) or contact the Moseley Technical Services Department.
3.2.3.2 Remote Control Operation
The channel selection function of the Multichannel transmitter can be accessed via the back
panel CHNL CONTROL connector. The schematic diagram of the 9-pin D connector and the
required interface logic is shown in Figure 2-14 and Table 2-3. Additionally, the 5 position
INTERNAL REMOTE dip switch (SW6) on the Channel Control board must have all switches in
the “OPEN” or “1” position for proper remote control operation.
The front panel CHANNEL display will indicate the current remote control state of the transmitter
with a red light in the upper left corner (RMT). The displayed channel number represents the
actual channel the transmitter is operating in. The SELECT knob will have no effect on the
transmitter in this mode. But the position of the SELECT knob retains its memory. Changing the
knob position will change the channel that the transmitter will return to if the REMOTE ENABLE is
disabled.
3.2.3.3 Front Panel Control “LOCKOUT” Operation
To prevent unauthorized or accidental changing of the channel via the SELECT knob, the front
panel can be “locked out” by programming the 5 position INTERNAL REMOTE dip switch (SW6)
on the Channel Control board. This switch emulates the remote control function internally and the
unit will appear to be in remote control operation. Switching out the INT RMT ENABLE (S6) will
return the transmitter to front panel control.
3.3 Receiver Operational Controls
3.3.1 Receiver Front Panel
The operation of the receiver front panel controls is very similar to the transmitter controls.
Figures 3-5, 3-6, and 3-7 show the PCL6020, PCL6030, and PCL6060 receiver front panels
(standard). The meter functions and scales are described in Table 3-2 (below). The top scale is
calibrated in dB, followed by a four-decade logarithmic scale, below which is a 0 to 25 linear
scale. On the bottom is a center arc for relative indications. The meter is an absolute value peakreading type with fast ballistics, since the purpose of the meter is to observe the peak values of
program material.
Three bi-color status LEDs indicate the operational status of the receiver. “SIGNAL” is green
when there is sufficient RF signal to exceed a user-established threshold of RF signal that
correlates to the minimum SNR that is acceptable to the user. When “SIGNAL” is red, there is
insufficient signal to meet the minimum SNR requirements and the receiver is placed in a nonoperating muted condition, which is indicated when “OPERATE” is red. When the receiver is
operating properly, “OPERATE” is green. “AFC LOCK” indicates the condition of the synthesized
second LO. It is green when the PLL is locked.
PCL6000
602-13375-01
Moseley PCL6000
PCL 6020 Aural STL Receiver
3-5
5
10
TRANSFER
20
300
AFC LVL
+5V
L0 1 LVL
-15V
LO 2 LVL
AFC LOCK
10
15
20
0
SIGNAL
3
1K
10
5
MUX LVL
RF LVL
0
10 0
30
PGM LVL
25
OPERATE
+15V
(MD1140)
Figure 3-5
PCL6020 Receiver Front Panel (Standard)
5
PCL 6030 Aural STL Receiver
TRANSFER
10 0
30
300
AFC LVL
+5V
LO 1 LVL
-15V
LO 2 LVL
+15V
LO 3 LVL
AFC LOCK
10
15
20
0
SIGNAL
3
1K
10
5
MUX LVL
RF LVL
0
10
20
PGM LVL
25
OPERATE
(MD1133)
Figure 3-6
PCL6030 Receiver Front Panel (Standard)
5
PCL 6060 Aural STL Receiver
TRANSFER
30
10 0
300
10
5
0
OPERATE
MUX LVL
RF LVL
AFC LVL
+5V
LO 1 LVL
-15V
LO 2 LVL
+15V
LO 3 LVL
0
10
20
PGM LVL
10
15
3
1K
20
AFC LOCK
SIGNAL
25
(MD1139)
Figure 3-7
PCL6060 Receiver Front Panel (Standard)
PCL6000
602-13375-01
3-6
Operation
Table 3-2 Receiver Meter Functions and Scales
Function
Scale
Units
Notes
RF LVL
Logarithmic
Microvolts
RF signal level at receiver input
LO1 LVL
Center Arc
Relative
First Local Oscillator
(relative level–calibrated to center)
LO2 LVL
Center Arc
Relative
Second Local Oscillator
(relative level–calibrated to center)
LO3 LVL
Center Arc
Relative
PCL6030/6060 ONLY
Third Local Oscillator
(relative level–calibrated to center)
PGM LVL
dB
dB
Peak program meter
0 dB = 3.5 Vp-p @ 100% modulation
MUX LVL
Linear
kHz
Subcarrier deviation
AFC LVL
Center Arc
Relative
AFC voltage
(relative level–calibrated to center)
+5 V
Linear
Volts
Power Supply
+15 V
Linear
Volts
Power Supply
-15 V
Linear
Volts
Power Supply
Figure 3-8 depicts the basic shape of the SNR curve with and without high-level signals in the
band. It should be emphasized that it is not necessarily only high-level adjacent channels that can
cause interference. There are many combinations of signals that can give rise to intermodulation
distortion, which will cause the resultant product to fall within the desired passband.
PCL6000
602-13375-01
Moseley PCL6000
3-7
NO ADJACENT INTERFERENCE
80
70
SNR WITH HIGHLEVEL ADJACENT SIGNALS
S
N
60
R
(dB)
50
100
50
1000
300
30
10,000
3000
30,000
(MD1128)
Figure 3-8 Typical SNR Curves
3.3.2 Receiver Rear Panel
The PCL6000 receiver rear panel (standard AC power) is depicted in Figure 3-9. All of the
program outputs (COMP/MONO) and MUX outputs are shown. The RF signal input is a type N
connector. The other functions on the barrier strip panel are used for standby/transfer
interconnections. CHNL REMOTE is used for the Multichannel option. All of the necessary
interconnections are found in Section 2. The fused AC input is line voltage programmable (see
Figure 2-1).
ANTENNA
CHNL REMOTE
SQUELCH
ARM
N/C
N/O
XFER
OUT
MUT MTR
IN
IN
OUT
MONO
SPARES
+
GND
MUX OUT
COMPOSITE OUT
-
1
2
1
2
FUSE
"This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions.
(1) This device may not cause harmful interference
(2) This device must accept any interference received
including interference that may cause undesired
operations."
(MD1141)
Figure 3-9
PCL6000 Receiver Rear Panel
The PCL6000 receiver rear panel (DC power option) is depicted in Figure 3-10. The DC input
panel is marked in the factory for the DC input voltage, the internal ground configuration (NEG
GND for positive DC input, ISO GND for negative or positive DC input), and fuse rating. See
Section 4.3 for further technical information concerning the internal DC configuration.
PCL6000
602-13375-01
3-8
Operation
ANTENNA
CHNL REMOTE
SQUELCH
ARM
N/C
N/O
XFER
OUT
IN
MUT MTR
IN
OUT
MONO
SPARES
+
GND
MUX OUT
COMPOSITE OUT
-
1
2
1
EF
US US
F
E
FUS E
2
"This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions.
(1) This device may not cause harmful interference
(2) This device must accept any interference received
including interference that may cause undesired
operations."
(MD1136)
Figure 3-10
PCL6000 Receiver Rear Panel (DC Option)
3.3.3 Multichannel Receiver Operation
The Multichannel receiver is preprogrammed for up to 16 channels of operation. The frequencies
are predetermined by the customer and are factory set at time of manufacture. The PCL6020
receiver front panel for the Multichannel option is depicted in Figure 3-11. The front panel display
indicates the CHANNEL number that is currently active. A label on the rear panel lists the
particular channel assignment frequencies. The front panel SELECT knob enables the user to
change channels as necessary. The transmitter and receiver are matched with respect to channel
assignment.
PGM LVL
RF LVL
PCL 6020 Aural STL Receiver
Multichannel System
TRANSFER
5
10
20
30
0
OPERATE
RMT
AFC LVL
0
10 0
300
10
5
MUX LVL
10
15
3
1K
20
+5V
L 01 LVL
-15V
L O 2 LVL
CHANNEL
SELECT
AFC LOCK
SIGNAL
25
+15V
(MD1134)
Figure 3-11
PCL6020 Receiver Front Panel (Multichannel Option)
3.3.3.1 User Programmable “CHANNEL 0”
CHANNEL 0 is provided as a user-programmable channel for backup or testing purposes. This
channel is set in the factory to duplicate CHANNEL 1. To set a new channel frequency, see
Section 5.3 (Alignment Procedures) or contact the Moseley Technical Services Department.
3.3.3.2 Remote Control Operation
The channel selection function of the Multichannel receiver can be accessed via the back panel
connector marked “CHNL REMOTE”. The schematic diagram of the 9-pin D connector and the
required interface logic is shown in Figure 2-14 and Table 2-3. Additionally, the 5 position
INTERNAL REMOTE dip switch (SW6) on the Channel Control board must have all switches in
the “OPEN” or “1” position for proper remote control operation.
The front panel CHANNEL display will indicate the current remote control state of the transmitter
with a red light in the upper left corner (RMT). The displayed channel number represents the
actual channel the transmitter is operating in. The SELECT knob will have no effect on the
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3-9
transmitter in this mode. But the position of the SELECT knob retains its memory. Changing the
knob position will change the channel the transmitter will return to if the REMOTE ENABLE line is
disabled.
3.3.3.3 Front Panel Control “LOCKOUT” Operation
To prevent unauthorized or accidental changing of the channel via the SELECT knob, the front
panel can be “locked out” by programming the 5 position INT ERNAL REMOTE dip switch (SW6)
on the Channel Control board. This switch emulates the remote control function internally and the
unit will appear to be in remote control operation. Switching out the INT RMT ENABLE (S6) will
return the receiver to front panel control.
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Operation
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4-1
4 Module Characteristics
4.1 Introduction
This section provides theory of operation for the PCL6000 modules. Please refer to the listed
schematic and assembly drawings for the receiver configuration (PCL6020/6030/6060),
frequency band of operation (950, 450, 330, or 220 MHz, or 1.7 GHz), and Multichannel Option
that applies to your system. Due to the many different system configurations, your particular
drawing package has been supplied with the manual.
Figure numbers for referenced drawings can be found in the Table of Contents at the beginning
of Section 7, Schematic and Assembly Drawings.
4.2 Transmitter Theory of Operation
4.2.1 Transmitter Audio/Power Supply
4.2.1.1 Power Supply (AC)
The power supply consists of an AC power connector (P1), transformer, rectifier (CR1),
capacitive filters (C4, C5), and fixed linear regulators (VR1, VR2, VR3, VR4). The power supply
has four output voltages: +15, -15, +5, and -12 VDC. The RFA supply is adjustable (R6) and
factory set to +12.5 VDC when the transmitter is radiating. This voltage is reduced to +1.5 VDC if
the AFC loses lock or if the transmitter is placed in STANDBY (see section 4.2.1.3). The rectifier
and regulator for the +12.5 VDC supply are mounted on the RFA heat sink. Capacitive ripple
filters C6, C7, C8 are mounted on the board and accessed through connector P2. The regulated 12 VDC is used to power the crystal ovens for the 1st LO and FMO reference oscillator crystals.
WARNING
Failure to ground the third lead of the input power cord may result in hazardous shocks to
personnel.
The AC power connector includes an RF filter. The transformer primary windings support the four
selectable input voltage ranges (100, 120, 220, and 240 VAC). Operating voltage is selected by
programming the line filter/fuse holder on the rear panel as described in Section 2.2.1, AC Line
Voltage Selection.
4.2.1.2 Power Supply (DC Option)
The transmitter can be optionally configured as a DC input (only) system. All DC systems can be
input-isolated for negative DC operation. Jumper E1 on the DC Option Power Supply assembly
(PS1) selects negative chassis ground (factory standard) or isolated ground. The back panel has
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4-2
Module Characteristics
a barrier strip for the DC input and is fused. The value of the fuse and the system ground
configuration is listed on the back panel.
The Audio/Power Supply board is modified by bypassing the bridge rectifier (CR1) and the ±15
VDC regulators (VR1 and VR2). The DC input from the switching supplies enters the board at P1.
See notes 2 and 3 in the schematic for further details.
4.2.1.3 Radiate Control Logic
The Radiate Control Logic circuitry consists of Q3, S1, and U1. This circuit will allow the
transmitter to radiate when the following conditions are simultaneously met:
1. The OPERATE/STANDBY switch (S1) is in the OPERATE position, or the
OPERATE/STANDBY switch (S1) is in the STANDBY position and pin 4 (D) of the
transmitter I/O panel remote connector (RMT RAD) is at ground potential (see Figure
2-13).
2. The AFC LOCK signal from the RF module (P4-2) is HIGH (+5 VDC).
3. Pin 9 (K) of the back-panel remote connector (RMT OVRD) is floating (not connected
to ground). This will appear as +5 VDC on this pin (see Figure 2-13).
When all of the above conditions occur, the base of Q3 will go from +3 V to 0 V, enabling the
+12.5 VDC power supply. The IPA and RFA will operate thus allowing the transmitter to radiate.
The OPERATE/STANDBY switch (S1) on the front panel is a double-pole, double-throw switch
used to activate logic circuits within the transmitter and is connected through the harness to pin 3
(C) of the back-panel remote connector (RMT MODE) for remote indication of the
OPERATE/STANDBY mode.
For ±12, ±24, and ±48 VDC supply configuration, Q3 provides a logic level output to switch the
internal DC supply on and off according to the RADIATE status. The schematic references this
option.
4.2.1.4 PA Current Signal Conditioner
The voltage drop appearing across the PA current sampling resistor (in the RFA module) is
presented to the Audio/Power Supply board on P3-9 and P3-10. Amplifier U15 and FET Q1
provide a current sample for the meter that is independent of the RFA supply voltage. The
current-to-voltage conversion is different for the various frequency bands.
220–950 MHz
0.18 VDC per Ampere
1.7 GHz
0.16 VDC per Ampere
The sample voltage is measured at the input terminals of the RFA module.
4.2.1.5 Metering and Status
The Metering Functions are selected by the front panel meter switch (S2) and are calibrated by
potentiometers R151 (+15V), R153 (-15V), R155 (+12V), R157 (+5V), R166 (LO1), R165 (AFC
LVL), R164 (IPA LVL), R163 (PA CURRENT), R162 (FWD PWR), R161 (REFL PWR), R201
(COMP PGM MTRG), R202 (MONO PGM MTRG), R203 (DIG PGM MTRG). The signals are
processed by absolute value amplifier and peak detector U11. This output is followed by a buffer
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and meter ballistics amplifier U12. R131 (METER ZERO) is used to electrically zero the meter.
R286 (METER BALLISTICS) is used to adjust the meter acceleration and ballistics response.
The forward power sample from the RFA enters the Audio/Power Supply board on P3-1 and is
amplified by U13b. The output is fed to the meter circuit for front panel meter display. This output
also appears on P4-9 (RMT-FWD1) for remote metering and hot standby purposes. Output P4-10
(RMT-FWD2) is available after the TPT THRESHOLD (R138) adjustment to be used in
conjunction with the MOSELEY Transmitter Transfer Panel (TPT-2) to optimize the switchover
point in a hot standby configuration. The output of U13b is also fed to differential amplifier U14a,
where it is used to control the front panel radiate status indicator (CR21).
The reflected power sample from the RFA enters the board on P3-2 and is amplified by U13a to a
usable level for metering.
U10b buffers the RF module AFC LVL signal (P5-1) for remote metering (RMT-AFC) that appears
on pin 8 (J) of the back panel remote connector.
U14b is an LED driver for the AFC LOCK status indicator (CR20) on the front panel; the LED is
red when the AFC is out of lock, and green when locked.
4.2.1.6 Audio Processor
The audio processor supports either monaural or composite operation. The balanced monaural
input is converted to an unbalanced signal with the active balanced input amplifier (U9 and U8).
Jumper E6 enables the user to optimize the network for different nominal input impedance and
levels (see the table in the schematic). The second half of U8 is an active 75ms pre-emphasis
network (enabled by jumper E5). F1 (R77) and F2 (R78) adjust the low and high frequency break
points for optimum frequency response. The monaural signal is routed through a seven pole
active filter (U7, U6, and U5) with 15 kHz cut-off. Adjustments FA (R76), FB (R75), and FC (R49)
are used to tune the roll-off of the filter and align the phase linearity of a dual-mono STL link. LF
TILT (R47) compensates for low frequency tilt caused by IF filter non-linearities. LPF GAIN (R45)
sets the overall monaural low pass filter unity gain. Jumper E4 selects the active filter to be in or
out of the monaural audio processing path.
Jumper E3 selects either the monaural or composite input to the audio processor. U3a is a noninverting amplifier to set the program levels of the audio processor for all configurations: MONO
(R199), COMPOSITE (R28), and DIGITAL (R28). The MUX inputs are summed into U3b and the
levels are independently adjustable: MUX1 (R29) and MUX2 (R40). The PROGRAM and MUX
signals are summed into U2b and both levels are routed to the metering circuits at this point. U2a
is an inverter which is selectable (E2) to match the STL link audio phase when using different
receivers. The baseband output is at J1 which is applied to the transmitter RF module.
4.2.2 Transmitter RF Module
4.2.2.1 FMO Synthesizer
The FMO Synthesizer consists of three main subgroups: the RF group, the digital group, and the
loop filter. The RF group includes the frequency modulated oscillator (FMO), buffer, reference
oscillator, and low-pass filter. The digital group includes a dual modulus prescaler and an
integrated PLL IC that provides multiple functions to be described later.
These three groups provide an RF signal source that has good short-term stability, low noise, and
is tunable over a wide frequency range. Selecting the appropriate divide ratio synthesizes the
crystal-controlled reference oscillator and ensures long-term stability.
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Module Characteristics
The FMO consists of low-noise field effect transistor Q4 in an RF grounded base configuration.
The drain of Q4 is connected to the resonant circuit inductor and capacitors. The capacitance for
this circuit is provided by C35, C40 and C41, as well as the three switching networks that control
the capacitors C26, C30, and C34. The inductance consists of a stripline inductor on the PC
board. Feedback to cause oscillation is from the drain to the source consisting of C40 and C41.
The normal frequency range of the oscillator is 60 to 80 MHz.
If the Multichannel option is being utilized in the system, the modulation signal enters the RF
module at J11-25 from the programmed compensation circuit located on the Channel Control
board. The modulation gain varies at different frequency settings, therefore the gain must be
compensated for. If the RF module is being used as a stand-alone, the modulation signal enters
the RF module at J1. The signal is then applied to CR12, which is a variable capacitance diode.
CR12 is coupled to the resonant circuit by C39. R37 (VARICAP BIAS ADJUST) adjusts the bias
on CR12 and is set for minimum modulation distortion, usually approximately -5 V. R33
(MODULATION ADJUST) adjusts the amount of modulation on the bias voltage applied to CR12.
A 3.5 Vp-p input at J1 will produce 100% modulation (50 kHz deviation, composite).
The signal is buffered by U4 which drives the seven-section elliptical low-pass filter comprised of
C55, L6, C56, C57, L7, C58, C59, L8, C60, and C61. This sharp cut-off filter attenuates the
harmonics of the FMO. The output is buffered by the resistive attenuator (R78, R79, R80) to
provide a level at the mixer of -6 dBm.
R48 is used to sample the FMO output as feedback for the high speed dual-modulus prescaler
(U2). The prescaler divides the 70 MHz signal by 10 or 11, depending on the divide ratio selected
by the integrated PLL chip (U1). This technique enables one divider IC to be used for small step
sizes. The PLL chip contains programmable dividers (/N, /A, /R), a digital phase detector,
modulus control logic, and lock detect circuitry to reduce chip count and increase reliability in
synthesizer designs.
OSC1 is a temperature compensated crystal oscillator (TCXO) that provides a stable, low phase
noise reference oscillator for the phase lock loop. The internal phase detector compares the VCO
and reference oscillator inputs and delivers a series of pulses to the integrating loop filter.
Loop filter U3 is an integrating low-pass filter that removes most of the reference frequency
component of the phase comparator output. It also provides DC gain to decrease the very low
frequency noise of the FMO. Further filtering of the AFC voltage is then delivered to CR10 and
CR11 through R30, closing the AFC loop. The frequency stability of the FMO is maintained by
CR10 and CR11, which is attached to the stripline inductor through C62. A voltage generated by
the AFC circuitry changes the capacitance of CR10 and CR11, which is also part of the tuning of
the FMO resonant circuit. Depending upon which capacitors are switched into the resonant
circuit—F1 (C34), F2 (C30), or FIX (C26)—the AFC level adjustment is used to place the phaselocked loop in the center of its operating control range. This is indicated by a nominal +7 VDC
AFC level.
For Multichannel operation, different capacitors are switched in to maintain an AFC range
between 5–9 VDC for different channel frequencies. These switching networks are labeled F1,
F2, and FIX. A logic level of +5 VDC at the input of the buffers (Q3, Q2, Q1) will connect that
corresponding capacitor into the resonant circuit. If the Multichannel option is being utilized in the
system, these settings come from the Channel Control board's programmed inputs at J11-5, -18,
-6, and switch S4 must be disabled (open circuit). If the RF module is being used as a standalone, switch S4 is used to switch in the required capacitors. In either case, green LED indicators
CR6 (F1) and CR5 (F2) will light to indicate which setting is active. The FIX capacitor is normally
used to band-switch to a frequency far removed from the initial setting.
The lock detect signal at U1-28 is a series of pulses at the step size rate (25 kHz) when the loop
is locked. The low pass filter (R19 and C13) provide an average voltage at U3-5 of +5 VDC when
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the loop is locked. If the loop becomes unlocked, the average voltage drops to 2.5 VDC. This
causes the output of comparator U3 to change state which lights the red LOSS OF LOCK LED on
the module. Also, the voltage at FL2 drops from +5 to 0 VDC, causing the radiate control circuitry
to put the transmitter in STANDBY.
The output frequency of the FMO is determined by the divider values programmed into the PLL
chip U1. If the Multichannel option is being utilized in the system, these settings come from the
Channel Control board's parallel inputs at J11, and the internal switches S1, S2, S3, and S4-1
must be disabled (S4-1 open circuit and S1,2,3 set to “F”). If the RF module is being used as a
stand-alone, the frequency is set by the values of switches S1, S2, S3, and S4-1. The output
frequency is determined by adding the resultant frequency values set by each switch. S4-1 is a
one bit switch that sets 64 MHz. S1, S2, and S3 are four-bit switches set to a hex value
(0,1,2,3,4,5,6,7,8,9, A,B,C,D,E,F), where A–F corresponds to 10–15. The transmitter frequency
example below illustrates the math.
Transmitter frequency example:
1st LO
=
1020.000
Carrier Freq
=
- 950.500
FMO Freq
=
70.500
SWITCH SETTINGS:
MHz
MHz
S4-1
1
X
64
=
64.000
S1
1
X
4
=
4.000
S2
A
X
.25
=
2.500
S3
0
X
.025
=
0.000
70.500
MHz
MHz
(Note: See section 5.3.9 for changing the STL frequency in the field)
4.2.2.2 1st Local Oscillator (950 MHz/1.7 GHz)
The 1st LO signal is derived from crystal-controlled oscillator Q5. The fifth overtone crystal (Y1;
102.000 MHz for 950 MHz, 92 MHz for 1.7 GHz) is temperature stabilized by a 65°C
proportionally controlled oven (HR1). Oscillator buffers Q6 and AR1 isolate the oscillator and
amplify the signal, preventing frequency pulling when adjusting the multipliers.
The output of the buffer is doubled in an active push-push doubler. The single-ended input from
the buffer is split into two out-of-phase voltages in T1 and applied to the bases of Q7 and Q8. The
output of these two transistors is summed at their collectors.
The output of the doubler is tuned by C94 and L14 and is impedance matched to the steprecovery diode multiplier by C95 and C96. The diode self-bias current is determined by RT1. The
step-recovery diode (CR14) forms the heart of a X5 multiplier (C98, C99, and the 12 nH printed
inductor). The multiplier converts the input sinusoidal signal to a stream of impulses. These
impulses are fed to an LC output circuit (L16 and C101) which is tuned to the desired output
frequency. The three pole helical filter (FL10) is tuned to the LO output frequency (1020 MHz
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4-6
Module Characteristics
nominal for 950 MHz, 920 MHz nominal for 1.7 GHz). The output is terminated into a 3 dB
attenuator, reducing the output power to that required by the 1st mixer and providing a wideband
match for the filter. The undesired harmonics are suppressed at least 40 dB. The output power is
between +5 and +9 dBm.
4.2.2.3 1st Local Oscillator (220 MHz)
The 1st LO signal is derived from crystal-controlled oscillator Q5. The fifth overtone crystal (Y1,
97.000 MHz nominal) is temperature stabilized by a 65°C proportionally controlled oven.
Oscillator buffers Q6 and AR1 isolate the oscillator and amplify the signal, preventing frequency
pulling when adjusting the multipliers.
The output of the buffer is phase-shifted in T1 and applied to the base of Q7.
The output of the transistor is impedance-matched to the step-recovery diode multiplier by C95.
The step-recovery diode (CR14) and the 12 nH printed inductor form a X3 multiplier. The
multiplier converts the input sinusoidal signal to a stream of impulses. These impulses are fed to
an LC output circuit (L16 and C101) which is tuned to the desired output frequency. The multiplier
output is routed through an external three pole helical filter and is tuned to the LO output
frequency (291 MHz nominal). The output is terminated into a 3 dB attenuator, reducing the
output power to that required by the 1st mixer and providing a wideband match for the filter. The
undesired harmonics are suppressed at least 40 dB. The output power is between +5 and +9
dBm.
4.2.2.4 1st Local Oscillator (330/450 MHz)
The 1st LO signal is derived from crystal-controlled oscillator Q5. The fifth overtone crystal
(96.250 MHz nominal) is temperature stabilized by a 65°C proportionally controlled oven.
Oscillator buffers Q6 and AR1 isolate the oscillator and amplify the signal, preventing frequency
pulling when adjusting the multipliers.
The output of the buffer is doubled in an active push-push doubler. The single-ended input from
the buffer is split into two out-of-phase voltages in T1 and applied to the bases of Q7 and Q8. The
output of these two transistors is summed at their collectors.
The output of the doubler is tuned by C94 and L14 and is impedance matched to the steprecovery diode multiplier by C95 and C96. The diode self-bias current is determined by RT1. The
step-recovery diode (CR14) forms the heart of a X2 multiplier (C98, C99, and the 12 nH printed
inductor). The multiplier converts the input sinusoidal signal to a stream of impulses. These
impulses are fed to an LC output circuit (L16 and C101) which is tuned to the desired output
frequency. The multiplier output is routed through an external three pole helical filter and is tuned
to the LO output frequency (385 MHz nominal). The output is terminated into a 3 dB attenuator,
reducing the output power to that required by the 1st mixer and providing a wideband match for
the filter. The undesired harmonics are suppressed at least 40 dB. The output power is between
+5 and +9 dBm.
4.2.2.5 Up Converter Chain (950 MHz)
The Up Converter Chain consists of a mixer, high gain amplifier, and filters. The mixer (HY1)
translates the FMO signal (60–80 MHz) up to the carrier frequency (950 MHz). The mixer is
double-balanced for LO rejection and the conversion loss is 8 dB.
The Intermediate Power Amplifier (IPA) is a four stage broadband RF amplifier (AR2, AR3, AR4,
AR5) with 30 dB of gain and an output power of +16 dBm. FL12 is a two-pole helical filter that
prevents intermodulation in the IPA. FL11 is a three-pole helical filter that provides the necessary
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spurious rejection for the RF module. The output stage (AR5) operates in compression to
minimize any changes in gain over a wide temperature range.
An output power detector (C124, CR16, R85, C125) is provided for the IPA. Relative power is
detected and relayed to the Audio/Power Supply board. This voltage should be approximately 2
volts.
The output of the RF module is sent through an external three-pole helical filter before being
applied to the RFA to further reduce unwanted spurious emissions (see system block diagram in
Section 1).
4.2.2.6 Up Converter Chain (220–450 MHz)
The Up Converter Chain consists of a mixer, high gain amplifier, and filters. The mixer (HY1)
translates the FMO signal (60–80 MHz) up to the carrier frequency. The mixer is double-balanced
for LO rejection and the conversion loss is 8 dB.
The output of the mixer is sent to an external 3-pole helical filter and then routed back to the RF
module IPA. The Intermediate Power Amplifier (IPA) is a four-stage broadband RF amplifier
(AR2, AR3, AR4, AR5) with 30 dB of gain and an output power of +20 dBm. The output stage
(AR5) operates in compression to minimize any changes in gain over a wide temperature range.
An output power detector (C124, CR16, R85, C125) is provided for the IPA. Relative power is
detected and relayed to the Audio/Power Supply board for metering. This voltage should be
approximately 2 to 3 volts.
The output of the RF module is sent through an external three-pole helical filter before being
applied to the RFA to further reduce unwanted spurious emissions (see system block diagram in
Section 1).
4.2.2.7 Up Converter Chain/Doubler Assembly (1.7 GHz)
The 1.7 GHz PCL6010 utilizes a doubler to achieve the carrier frequency, therefore the
Upconverter is nearly identical to the 950 MHz band Up Converter. The Up Converter Chain
consists of a mixer, high gain amplifier, and filters. The mixer (HY1) translates the FMO signal
(60–80 MHz) up to the RF module output frequency (850 MHz). The mixer is double-balanced for
LO rejection and the conversion loss is 8 dB.
The Intermediate Power Amplifier (IPA) is a four-stage broadband RF amplifier (AR2, AR3, AR4,
AR5) with 30 dB of gain and an output power of +16 dBm. FL12 is a two-pole helical filter that
prevents intermodulation in the IPA. FL11 is a three-pole helical filter that provides the necessary
spurious rejection for the RF module. The output stage (AR5) operates in compression to
minimize any changes in gain over a wide temperature range.
An output power detector (C124, CR16, R85, C125) is provided for the IPA. Relative power is
detected and relayed to the Audio/Power Supply board. This voltage should be approximately 2
volts.
The output of the RF module is sent to the Doubler Assembly which multiplies the modulated
signal (X2) to bring the carrier to the 850 MHz (nominal) operating frequency. The output of the
doubler is filtered by an external 5-pole interdigital coupled resonator filter to select the
appropriate harmonic before being applied to the RFA (see system block diagram in Section 1).
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Module Characteristics
4.2.3 RF Amplifier
4.2.3.1 RF Amplifier (950 MHz)
The RF Amplifier module is a three-stage power amplifier designed to produce 6 watts nominal
output power over the 890–960 MHz band when driven with a +16 dBm nominal input signal. The
heart of the module is a high gain UHF power amplifier hybrid device (AR1) that exhibits excellent
stability and ruggedness. AR1 provides 22 dB of gain that is factory-set in the transmitter for 6
watts by adjustment of R1. Field adjustment of R1 is not recommended since other design
considerations will be compromised (i.e., DC power consumption, temperature stability,
efficiency, etc.).
CAUTION
Power must be limited to +19 dBm (80 mW) or permanent damage to the module may result.
The PA current sample is derived across R2 plus any additional line losses to provide 0.18
volt/amp sensitivity at the RFA input terminals (C701 and C702). This sample is fed to the
Audio/Power Supply board and a test point is provided for monitoring.
The seven-section low-pass filter following AR1 is realized in a semi-lumped configuration
utilizing microstripline inductors, open-circuited stubs and lumped capacitors C8 and C9. The filter
attenuates the harmonics of the final stage to better than -60 dBc per FCC requirements.
The dual-directional coupler is fabricated using stripline technology to provide high-directivity,
therefore assuring accurate forward and reflected power sampling. Detectors CR1 and CR2
provide DC meter samples for reflected and forward power, respectively. These sample voltages
are fed to the Audio/Power Supply board. The forward and reflected power sample is conditioned
and fed to the meter for monitoring. Forward power voltage level at C721 is approximately 2.5
VDC for the nominal 10 watts output. Reflected power voltage level at C722 is approximately 2.5
VDC for the 100% reflected power.
The RFA supply bridge diode (CR101) and regulator (Q101) are mounted to the heat sink of the
RFA.
4.2.3.2 RF Amplifier (450 MHz)
The RF Amplifier module is a three-stage power amplifier designed to produce 10 watts (nominal)
output power over the 440–470 MHz band when driven with a +20 dBm (nominal) input signal.
The heart of the module is a high gain UHF power amplifier hybrid device (AR1) that exhibits
excellent stability and ruggedness. AR1 provides 20 dB of gain and the power output is factoryset in the transmitter for 10 watts by adjustment of the +12.5 VDC supply on the Audio/Power
Supply board. Field adjustment of the power supply is not recommended since other design
considerations will be compromised (i.e., DC power consumption, temperature stability,
efficiency, etc.).
CAUTION:
Power must be limited to +23 dBm (200 mW) or permanent damage to the module may result.
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The PA current sample is derived across R2 plus any additional line losses to provide 0.18
volt/amp sensitivity at the RFA input terminals (C701 and C702). This sample is fed to the
Audio/Power Supply board and a test point is provided for monitoring.
The seven-section low-pass filter following AR1 is realized in a lumped element configuration
utilizing air-coil inductors (L3, L4, L5) and chip capacitors (C6, C7, C8, C9). The filter attenuates
the harmonics of the final stage to better than -60 dBc per FCC requirements.
The dual-directional coupler (DC1) is fabricated using a copper shielded twisted-pair coaxial line
to provide high-directivity, therefore assuring accurate forward and reflected power sampling.
Detectors CR2 and CR3 provide DC meter samples for reflected and forward power, respectively.
These sample voltages are fed to the Audio/Power Supply board. The forward and reflected
power sample is conditioned and fed to the meter for monitoring. Forward power voltage level at
C721 is approximately 2.5 VDC for the nominal 10 watts output. Reflected power voltage level at
C722 is approximately 2.5 VDC for the 100% reflected power.
The RFA supply bridge diode (CR101) and regulator (Q101) are mounted to the heat sink of the
RFA.
4.2.3.3 RF Amplifier (330 MHz)
The RFA module is a three-stage discrete bipolar amplifier utilizing lumped elements for
impedance matching and tuning. The amplifier provides 20 dB of gain to an output level of 10
watts.
The input applied at J1 is nominally +20 dBm (100 mW). The first stage (Q1) is operated class A
and its input matched by C5, C8, and L1. This stage provides 9 dB of gain. The output of the first
stage is tuned and matched to the input of the second stage by L2, C8, and C11. The second
stage is operated class C and provides 7 dB of gain. The output of the second stage is tuned and
matched to the input of the final stage by L4, C13, and C16. The final stage is operated class C
and provides 6 dB of gain. L5, L6, C18, and C17 match the final output impedance into the 5element low pass filter (C19, L7, C20, L8, C21). The filter attenuates harmonics of the final stage
to better than -60 dBc per FCC requirements. The output impedance of the filter is 50 ohms.
The dual directional coupler is composed of two coupled-line microstrip sections. The forward and
reflected power levels are rectified by diodes CR1 and CR2, respectively. These levels are
filtered with RC low-pass networks to reduce EMI in the meter sample output lines. The final
current sample (0.18 VDC/Amp) is provided by R5 and is metered (nominal 2.2 amp).
The RFA supply bridge diode (CR101) and regulator (Q101) are mounted to the heat sink of the
RFA.
4.2.3.4 RF Amplifier (220 MHz)
The RF Amplifier is a two-stage discrete bipolar amplifier utilizing lumped elements for impedance
matching and tuning. The amplifier provides 20 dB of gain to an output level of 10 watts.
The input applied at J1 is nominally +20 dBm (100 mW). The first stage (Q1) is operated class C
and its input matched by C1, C2, and L1. This stage provides 12 dB of gain. The output of the
first stage is tuned and matched to the input of the final stage by L3, C5, and C6. The final stage
is operated class C and provides 8 dB of gain. L6, L7, C11, and C10 match the final output
impedance into the 6-element low pass filter (L8, C12, L9, C13, L10, C14). The filter attenuates
harmonics of the final stage to better than -60 dBc per FCC requirements. The output impedance
of the filter is 50 ohms.
The dual directional coupler is composed of two coupled-line microstrip sections. The forward and
reflected power levels are rectified by diodes CR1 and CR2, respectively. These levels are
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Module Characteristics
filtered with RC low-pass networks to reduce EMI in the meter sample output lines. The final
current sample (0.18 VDC/Amp) is provided by R4 and is metered (nominal 2.2 amp).
The RFA supply bridge diode (CR101) and regulator (Q101) are mounted to the heat sink of the
RFA.
4.2.3.5 RF Amplifier (1.7 GHz)
The RFA module is a four-stage discrete amplifier utilizing microstrip matching elements for
impedance matching and tuning. The amplifier provides 38 dB of gain to an output level of 6
watts.
The input applied at J1 is nominally 0 dBm (1 mW). The first three stages are common-source
class A FET amplifier stages utilizing a bipolar DC bias scheme requiring the -15 VDC supply.
The gain of each stage is set by the gate bias adjustment. The final stage is a common-base
class C bipolar design that is matched directly into the 7-element low-pass filter. The filter
attenuates harmonics of the final stage to better than -60 dBc per FCC requirements. The output
impedance of the filter is 50 ohms.
The dual directional coupler is composed of two coupled-line microstrip sections. The forward and
reflected power levels are rectified by diodes D2 and D1, respectively. These levels are filtered
with RC low-pass networks to reduce EMI in the meter sample output lines. The final current
sample (0.16 VDC/Amp) is provided by R31 and is metered (nominal 2.0 amp).
The RFA supply bridge diode (CR101) and regulator (Q101) are mounted to the heat sink of the
RFA.
4.2.4 Channel Control Board (Multichannel Option)
The Channel Control Board is used to control the RF module frequency selection, provide front
panel display, and implement the remote control facilities for channel selection. The transmitter
version (-1) provides gain compensation for the FMO modulation sensitivity variation with
frequency change.
Mux IC (U4) selects either the front panel channel select switch (S1) or the CHANNEL REMOTE
INPUT (P1-1, -2, -3, -4), providing a BCD output to the address lines of the EPROMs (U1, U2,
and U3) for channels 0–15. The remote input is toggled active by the REM ENABLE line (P1-5)
which also controls the RMT LED on the display (DP, upper left corner). Board mounted
INTERNAL MODE switch (S6) emulates the remote input function for internal security lockout of
the front panel channel selection.
Logic IC (U5) decodes and detects channel address number 0 to toggle between EPROM control
(PROM ENABLE) and on-board manual programming control (CHNL 0 ENABLE) via switches
S2, S3, S4, and S5. The EPROM outputs (PROM PROGRAM) are buffered by bus drivers U7,
U8, and U9. The switch outputs are buffered by bus drivers U10, U11, and U12. The driver
outputs are parallel connected (PROGRAM OUTPUT BUS) and enable bank switching of the
outputs. When channel number 0 is selected, the switches take control and the RF module may
be programmed for a user-specified frequency. The programming bits are assigned as shown in
Table 4-1.
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Table 4-1
Transmitter Channel 0 Programming
Bit Name
Assignment
Comments
N8
64 MHz
N7
32 MHz
N6
16 MHz
N5
8 MHz
N4
4 MHz
N3
2 MHz
N2
1 MHz
N1
500 kHz
N0
250 kHz
A3
200 kHz
A2
100 kHz
A1
50 kHz
A3
200 kHz
C5
“FIX” CAP ACTIVE
RF Module Circuit
C4
“F2” CAP ACTIVE
RF Module Circuit
C3
“F1” CAP ACTIVE
RF Module Circuit
C2
“MOD1” ADJ ACTIVE
TX Only
C1
“MOD2” ADJ ACTIVE
TX Only
C0
“MOD3” ADJ ACTIVE
TX Only
The two digit display (DGT1, DGT2) is controlled by the EPROM outputs D0–D4. D0 controls the
10's digit and D1–D4 (BCD DISPLAY) are decoded by U13 to provide the 1's display. For
systems with less than 16 channels, the display will blank and no programming is available.
DGT1 may be tested by shorting jumper E1 (DGT1 TEST).
Analog switch IC (U6) is used to compensate for modulation gain variations with frequency in the
FMO (located in the transmitter RF Module). Each pot adjustment (R12, R13, and R14) operates
independent of each other and is factory set for each system configuration.
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Module Characteristics
4.3 Receiver Theory of Operation
4.3.1 Receiver Audio/Power Supply
4.3.1.1 Power Supply (AC)
The power supply consists of an AC power connector (P1), transformer, rectifier (CR1),
capacitive filters (C4, C5), and fixed linear regulators (VR1, VR2, VR3, VR4). The power supply
has four output voltages: +15, -15, +5, -12. The regulated -12 VDC is used to power the crystal
ovens for the 1st LO and 2nd LO crystals.
WARNING:
Failure to ground the third lead of the input power cord may result in hazardous
shocks to personnel.
The AC power connector includes an RF filter. The transformer primary windings support the four
selectable input voltage ranges (100, 120, 220, and 240 VAC). Operating voltage is selected by
programming the line filter/fuse holder on the rear panel as described in Section 2.2.1, AC Line
Voltage Selection.
4.3.1.2 Power Supply (DC Option)
The receiver can be optionally configured as a DC input (only) system. All DC systems can be
input-isolated for negative DC operation. Jumper E1 on the DC Option Power Supply assembly
(PS1) selects negative chassis ground (factory standard) or isolated ground. The back panel has
a barrier strip for the DC input and is fused. The value of the fuse and the system ground
configuration is listed on the back panel.
The Audio/Power Supply board is modified by bypassing the bridge rectifier (CR1) and the ±15
VDC regulators (VR1 and VR2). The DC input from the switching supplies enters the board at P1.
See the schematic for further details.
4.3.1.3 Mute and Transfer
The Mute and Transfer circuitry contains the necessary logic to squelch the receiver during
periods of insufficient RF signal strength. The receiver will mute whenever one or more of the
following conditions are present:
1. The signal mute line (SIGMUTE, P5-4) from the IF Demod module (PCL6020) or FM
Demod module (PCL6030/6060) is at a logic low level (0 VDC).
2. The rear panel remote mute input (MUTEIN, P2-8) is grounded.
3. The rear panel auto transfer input (XFERIN, P2-9) is at a logic high level (+5 VDC).
This signal will force the collector of Q1 to a logic low level.
4. The front panel momentary manual transfer switch (S1) is activated, also forcing the
collector of Q1 to a logic low level.
5. The AFC LOCK signal from the RF module (P3-6) is at a logic low level, indicating a
loss of lock condition in the 2nd LO.
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When one of the above conditions is present, pin 6 of U15a will go to a logic high level. This
signal activates the FET mute switch (U1). This signal is inverted by U15b to control the front
panel “OPERATE” status LED and activate the driver/inverter U16.
U16c is a high current relay driver for the mute relay (K1). When the receiver is muted, pin 6 of
U16 will go high and no current will flow through the relay coil. This condition is also true if power
to the receiver is lost. In the mute mode, K1 disconnects the program signal at P2-20
(composite), P2-18 (MONO+), P2-16 (MONO-), and P2-14 (MUX). The armature contacts of K1
are connected to the rear panel to activate alarms.
U16a and U16b form a non-inverting relay driver for remote transfer to another receiver in a hot
standby installation. This output (XFEROUT) appears at P2-7 and is routed to the rear I/O panel.
Refer to Section 2 of this manual for further information.
4.3.1.4 Metering and Status
The Metering Functions are selected by the front panel meter switch (S2) and are calibrated by
potentiometers R210 (+15V), R212 (-15V), R213 (+5V), R172 (SIG LVL), R171 (PGM LVL), R170
(MUX LVL), R169 (AFC LVL), R169 (LO1), R168 (LO2), R167 (LO3). The signals are processed
by absolute value amplifier and peak detector U19. This output is followed by a buffer and meter
ballistics amplifier U20. R186 (METER ZERO) is used to electrically zero the meter. R196
(METER BALLISTICS) is used to adjust the meter acceleration and ballistics response.
Amplifier U17b drives the “SIGNAL” LED (CR20) on the front panel. “SIGNAL” is red when a
carrier signal is not present, and green when a carrier signal is present.
Amplifier U17a drives the “AFC LOCK” LED (CR19) on the front panel. Green indicates the 2nd
LO/Synthesizer is properly locked. Red indicates a loss of lock.
Amplifier U18a drives the “OPERATE” LED (CR21) on the front panel. Green indicates the
receiver is not muted as determined from the Mute and Transfer circuitry. Red indicates a mute or
standby condition.
4.3.1.5 Audio Processor
The baseband input enters the Audio/Power Supply board at J1. U1 is a FET mute switch that is
controlled by the Mute and Transfer circuitry and prevents high level noise from entering the
audio processor under a mute condition. Amplifier U2 is configured as a high frequency tilt
compensation circuit for the IF filter nonlinearities. R7 (COMP HF TILT) is used for composite
operation and R208 (MONO HF TILT) is used for monaural operation. The output of U2 is split
into low-frequency audio and high-frequency mux signals.
Jumpers E1 and E6 select the composite high pass MUX filter or the monaural high pass MUX
filter and route the audio to the appropriate processing circuitry. The high-pass filtered mux signal
is buffered by U3, which has a MUX gain adjustment (R12, MUX LVL). Jumpers E7 and E8 select
the composite or monaural MUX low pass filters that improve selectivity performance in the MUX
channel. Buffer U4 drives the MUX output and provides a metering point.
The composite signal is processed by U5 where R61 (COMP LF TILT) is used to set the lowfrequency gain compensation. The seven pole elliptical composite low pass filter (C70–C76, L9–
L11) attenuates MUX signals and high frequency distortion products. Buffer U6b isolates and
controls the impedance as seen by the filter. U7 is an all-pass delay equalization circuit to correct
for IF response and optimize stereo separation. U6a is a summing amplifier for the delay
equalizer and R111 (DELAY EQ) optimizes the circuit for each receiver. The audio is monitored
at this point for metering. Jumper E9 bypasses the composite LPF and delay equalizer for digital
STL applications. Jumper E5 selects the audio for composite or monaural operation.
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Module Characteristics
The monaural signal is processed by U8 which is an active 75 ms de-emphasis network.
Adjustments F1 (R23) and F2 (R22) accurately set the de-emphasis curve for optimum response.
Jumper E2 enables (IN) or disables (OUT) de-emphasis. The mono signal is optionally routed
through a seven pole active filter (U9, U10, and U11) with a 15 kHz cut-off. Adjustments FA
(R30), FB (R78), and FC (R82) are used to tune the roll-off of the filter and align the phase
linearity of a dual-mono STL link. MONO LF TILT (R88) compensates for low frequency tilt
caused by IF filter non-linearities. LPF GAIN (R89) sets the overall mono low pass filter unity
gain. Jumper E3 selects the active filter to be in or out of the mono audio processing path.
Amplifier U12b enables monaural program level adjustment with R98 (MONO PGM LVL). The
program level is metered at this point and R90 (MONO PGM MTRG) compensates for level
changes between composite and monaural system switching. U13 and U14 comprise an active
balanced output driver stage capable of +10 dBm audio power.
4.3.2 Receiver RF Module
4.3.2.1 2nd LO/Synthesizer
The 2nd LO/Synthesizer consists of three main subgroups: the RF group, the digital group, and
the loop filter. The RF group includes the voltage controlled oscillator (VCO), buffer, reference
oscillator, and low-pass filter. The digital group includes a dual modulus prescaler and an
integrated PLL IC that provides multiple functions to be described later.
These three groups provide an RF signal source that has good short-term stability, low noise, and
is tunable over a wide frequency range. Selecting the appropriate divide ratio synthesizes the
crystal-controlled reference oscillator and ensures long-term stability.
The VCO consists of low-noise field effect transistor Q4 in an RF grounded base configuration.
The drain of Q4 is connected to the resonant circuit inductor and capacitors. The capacitance for
this circuit is provided by C35, C40, and C41, as well as the three switching networks that control
the capacitors C26, C30, and C34. The inductance consists of a stripline inductor on the PC
board. Feedback to cause oscillation is from the drain to the source consisting of C40 and C41.
The normal frequency range of the oscillator is 70.7 to 90.7 MHz.
The signal is buffered by U4, which drives the seven-section elliptical low-pass filter comprised of
C55, L6, C56, C57, L7, C58, C59, L8, C60, and C61. This sharp cut-off filter attenuates the
harmonics of the 2nd LO. The output is buffered by the resistive attenuator (R78, R79, R80) to
provide a level at the mixer of -6 dBm.
R48 is used to sample the VCO output as feedback for the high speed dual-modulus prescaler
(U2). The prescaler divides the 80.7 MHz signal by 10 or 11, depending on the divide ratio
selected by the integrated PLL chip (U1). This technique enables one divider IC to be used for
small step sizes. The PLL chip contains programmable dividers (/N, /A, /R), a digital phase
detector, modulus control logic, and lock detect circuitry to reduce chip count and increase
reliability in synthesizer designs.
OSC1 is a temperature compensated crystal oscillator (TCXO) that provides a stable, low phase
noise reference oscillator for the phase lock loop. The internal phase detector compares the VCO
and reference oscillator inputs and delivers a series of pulses to the integrating loop filter.
Loop filter U3 is an integrating low-pass filter that removes most of the reference frequency
component of the phase comparator output. It also provides DC gain to decrease the very low
frequency noise of the 2nd LO. Further filtering of the AFC voltage is then delivered to CR10 and
CR11 through R30, closing the AFC loop. The frequency stability of the 2nd LO is maintained by
CR10 and CR11, which is attached to the stripline inductor through C62. A voltage generated by
the AFC circuitry changes the capacitance of CR10 and CR11, which is also part of the tuning of
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the VCO resonant circuit. Depending upon which capacitors are switched into the resonant
circuit—F1 (C34), F2 (C30), or FIX (C26)—the AFC level adjustment is used to place the phaselocked loop in the center of its operating control range. This is indicated by a nominal +7 VDC
AFC level.
For Multichannel operation, different capacitors are switched in to maintain an AFC range
between 5–9 VDC for different channel frequencies. These switching networks are labeled F1,
F2, and FIX. A logic level of +5 VDC at the input of the buffers (Q3, Q2, Q1) will connect that
corresponding capacitor into the resonant circuit. If the Multichannel option is being utilized in the
system, these settings come from the Channel Control board's programmed inputs at J11-5, -18,
and -6, and switch S4 must be disabled (open circuit). If the RF module is being used as a standalone, switch S4 is used to switch in the required capacitors. In either case, green LED indicators
CR6 (F1) and CR5 (F2) will light to indicate which setting is active. The FIX capacitor is normally
used to band-switch to a frequency far removed from the initial setting.
The lock detect signal at U1-28 is a series of pulses at the step size rate (25 kHz) when the loop
is locked. The low pass filter (R19 and C13) provide an average voltage at U3-5 of +5 VDC when
the loop is locked. If the loop becomes unlocked, the average voltage drops to 2.5 VDC. This
causes the output of comparator U3 to change state which lights the red LOSS OF LOCK LED on
the module. Also, the voltage at FL2 drops from +5 to 0 VDC, causing the radiate control circuitry
to put the transmitter in STANDBY.
The output frequency of the 2nd LO is determined by the divider values programmed into the PLL
chip U1. If the Multichannel option is being utilized in the system, these settings come from the
Channel Control board's parallel inputs at J11, and the internal switches S1, S2, S3, and S4 must
be disabled (S4 open circuit and S1,2,3 set to “F”). If the RF module is being used as a standalone, the frequency is set by the values of switches S1, S2, S3, and S4. The output frequency is
determined by adding the resultant frequency values set by each switch. S4-1 is a one-bit switch
that sets 64 MHz. S1, S2, and S3 are four-bit switches set to a hex value (0,1,2,3,4,5,6,7,8,9,
A,B,C,D,E,F), where A–F corresponds to 10–15. The transmitter frequency example below
illustrates the math.
Receiver 2nd LO frequency example:
1st LO
Carrier Freq
1st IF Freq
=
=
=
1020.000
- 950.000
70.000
MHz
MHz
1st IF Freq
2nd IF Freq
2nd LO/Synth
SWITCH SETTINGS:
S4-1
S1
S2
S3
=
=
=
1
4
2
8
70.000
+ 10.700
80.700
X
X
X
X
64
4
.25
.025
MHz
MHz
MHz
=
=
=
=
64.000
16.000
.500
0.200
80.700
MHz
MHz
(Note: See section 5.3.9 for changing the STL frequency in the field)
4.3.2.2 1st Local Oscillator (950 MHz)
The receiver 1st LO is identical to the transmitter 1st LO circuit. See section 4.2.2.2 (TX RF
Module) for a detailed circuit description.
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Module Characteristics
4.3.2.3 1st Local Oscillator (220 MHz)
The receiver 1st LO is identical to the transmitter 1st LO circuit. See section 4.2.2.3 (TX RF
Module) for a detailed circuit description.
4.3.2.4 1st Local Oscillator (330/450 MHz)
The receiver 1st LO is identical to the transmitter 1st LO circuit. See section 4.2.2.4 (TX RF
Module) for a detailed circuit description.
4.3.2.5 1st Local Oscillator (1.7 GHz)
The 1st LO signal is derived from crystal-controlled oscillator Q5. The fifth overtone crystal (Y1,
102.000 MHz nominal) is temperature stabilized by a 65°C proportionally controlled oven (HR1).
Oscillator buffers Q6 and AR1 isolate the oscillator and amplify the signal, preventing frequency
pulling when adjusting the multipliers.
The output of the buffer is doubled in an active push-push doubler. The single-ended input from
the buffer is split into two out-of-phase voltages in T1 and applied to the bases of Q7 and Q8. The
output of these two transistors is summed at their collectors.
The output of the doubler is tuned by C94 and L14 and is impedance matched to the steprecovery diode multiplier by C95 and C96. The diode self-bias current is determined by RT1. The
step-recovery diode (CR14) forms the heart of a X8 multiplier (C98, C99, and a microstrip
element). The multiplier converts the input sinusoidal signal to a stream of impulses. These
impulses are fed to C101, which is tuned to the desired output frequency. The multiplier output is
routed through an external three pole helical filter and is tuned to the LO output frequency (1632
MHz nominal). The output is terminated into a 3 dB attenuator, reducing the output power to that
required by the 1st mixer and providing a wideband match for the filter. The undesired harmonics
are suppressed at least 40 dB. The output power is between +5 and +9 dBm.
4.3.2.6 Preselector/Preamplifier/1st Mixer (950 MHz, PCL6020/6030)
The receiver RF input passes through a two-pole helical filter (FL12) to protect the succeeding
low-noise preamp from high level carriers. The preamp (AR2) is a monolithic gain block with a
gain of 14 dB (NF = 2.8 dB). The three-pole helical filter (FL11) provides image frequency
rejection and front-end selectivity characteristics (BW = 20 MHz). Mixer HY1 performs the first
down-conversion, in conjunction with the 1st LO, to the 1st IF (60–80 MHz).
4.3.2.7 Preselector/Preamplifier/1st Mixer (950 MHz, PCL6060)
In order to accommodate the PCL6060 receiver, the RF module is configured differently. The
Preselector, Preamplifier, 1st Mixer and 1st IF amplifier are not installed and the 1st LO is routed
to the IF output connector (J2). See the description of the Preamp/1st Mixer module below.
4.3.2.8 Preselector/Preamplifier/1st Mixer (150–450 MHz)
The receiver RF input passes through an external three-pole helical filter to protect the
succeeding low-noise preamp from high level carriers and provide the front-end selectivity
characteristic (BW = 8 MHz). The preamp (AR2) is a monolithic gain block with a gain of 20 dB
(NF = 2.8 dB). Mixer HY1 performs the first down-conversion to the 60–80 MHz IF.
4.3.2.9 Preselector/Preamplifier/1st Mixer (1.7 GHz)
The receiver RF input passes through an external five-pole interdigital coupled resonator filter to
protect the succeeding low-noise preamp from high level carriers and provide the front-end
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selectivity characteristic (BW = 20 MHz). The preamp (AR2) is a monolithic gain block with a gain
of 14 dB (NF = 2.8 dB). Mixer HY1 performs the first down-conversion to the 60–80 MHz IF.
4.3.2.10
1st IF Amplifier (PCL6020/6030)
The IF output of the mixer (HY1) is terminated with a constant-impedance diplexer network
(C108, L18, R79, C109, L19) and wideband amplifier AR3 that has a high intercept point to
prevent interference intermodulation. The 1st IF amp also buffers the mixer output and provides
gain to overcome conversion losses.
4.3.3 Preamp/1st Mixer (950 MHz, PCL6060)
The Preamp/1st Mixer module has been designed to provide optimum service in the most hostile
RF environments. The active attenuator, low-noise preamplifier, 1st mixer, and 1st IF amplifier
are integrated in this module.
The input signal is applied to a PIN diode attenuator normally set to minimum loss (0.5 dB). By
adjusting the diode bias via R13 (RF ATTEN ADJ), the attenuator can be set to approximately 15
dB to prevent preamp overload in very high level RF environments.
The signal is split by a 3 dB hybrid coupler (microstrip design). The outputs are each applied to
low-noise amplifiers Q3 and Q4. Each amplifier employs active bias (Q2, Q5) to stabilize the best
low-noise bias conditions. The outputs are recombined by another hybrid coupler. This
configuration increases the third intercept point by 3 dB, providing an extremely robust front-end
preamp.
The signal passes through a microstrip image noise filter to be applied to the 1st mixer (U1). At
this point, the carrier signal is down-converted to the 1st IF (60–80 MHz) by mixing with the 1st
LO (1020 MHz).
The IF output is terminated with a constant-impedance diplexer network (C8, L4, R4, C7) and
tuned amplifier Q1 that has a high intercept point to prevent interference intermodulation. The 1st
IF amp also buffers the mixer output and provides gain to overcome conversion losses. C4 and
L3 tune the output of the amp to provide filtering.
4.3.4 IF Demod (PCL6020)
The IF Demod module incorporates several functions including the 1st IF bandpass filter, 2nd
mixer, 2nd IF filters, and FM demodulator.
The input signal at the 1st IF (60–80 MHz) enters at J2 and is amplified by Q3 to overcome the
succeeding filter losses. The nominal 70 MHz BPF is a 3-pole lumped element, synchronouslytuned, capacitively coupled design whose primary purpose is to reduce undesired signals to
levels that will not cause intermodulation in the 2nd mixer and IF amplifier. The 10 dB bandwidth
is 4 MHz. Jumper E1 can be used to access this filter for testing.
The 2nd mixer performs down conversion of the carrier to 10.7 MHz. The output is diplexed (L1–
L3, C1–C3, R4) to provide a constant impedance filter function and is amplified by Q1, Q2, and
associated circuitry.
The FM demodulator is comprised mainly of U2, a high performance integrated circuit designed
for wideband FM demodulation at 10.7 MHz and provides a low noise, low distortion output in
addition to providing a variety of internal functions. The input (pin 1) is preceded by the 1st IF
Filter (FL7) which is a linear phase, monolithic ceramic resonator. The signal is buffered and the
output (pin 2) is applied to the 2nd IF Filter (FL8). These filters set the selectivity of the receiver
and are adjusted for minimum distortion by C13 and C18. The signal is then fed to the IF limiter
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Module Characteristics
amplifier input (pin 5) and the quadrature detector circuit (pins 10 and 11). The quadrature tank
circuit (C26, C68, R16, L8, and L9) is singly tuned and U2 provides a distortion compensation
circuit internally to achieve this simpler approach to quadrature detection. The demodulated
baseband output (pin 15) is applied to amplifier U4 and the output is adjusted by R19. Baseband
level (TP2) may be used for monitoring. The IF limiter also provides a logarithmic meter output
(pin 8) which is proportional to signal strength. This output is fed to buffer amp U3 and is available
on the Audio/Power Supply board for metering. R18 (MUTE THRESHOLD ADJUST) provides
feedback to the mute circuit (pin 13) and sets the signal mute level. The mute output (pin 16) is
sent to the mute logic circuit located on the Audio/Power Supply board. The current in R17 is zero
when the quad tank is tuned to center frequency, therefore a demod balance voltage is available
(TP1) that should be 0 ± 0.5 volt when tuned properly. The test point is available on the
Audio/Power Supply board for metering.
4.3.5 Double Converter/LO3 (PCL6030/6060)
System selectivity of the receiver is provided by the Double Converter/LO3 module. The following
discussion will describe the signal flow.
The input signal is amplified by Q1 to overcome the insertion loss of the 70 MHz bandpass filter.
This amplifier also acts as an impedance transformer from the 50 ohm input impedance to the
3000 ohm impedance of the filter.
The primary purpose of the 70 MHz bandpass filter is to reduce undesired signals to levels that
will not cause intermodulation in the 2nd mixer and 2nd IF amplifiers. The 10 dB bandwidth of this
filter is 4 MHz. The output of the filter is impedance-transformed down to 50 ohms to match the
mixer. The output of the filter is applied to mixer U1 through test point E1 and the optional
attenuator at E6. This attenuator compensates for differing system gains of the PCL6030 and
PCL6060 receivers.
The signal input to mixer U1 is mixed with the 2nd LO signal to produce the 2nd IF signal at 10.7
MHz. The 2nd LO signal is provided by the synthesizer in the RF module. The mixer is double
balanced, and its IF port (10.7 MHz) is diplexed (L1, C1, C2, R1) and fed through a filter (L2, C3,
L3) to amplifier Q1. The output of the 1st 10.7 MHz amplifier (Q1) is buffered by emitter follower
Q2. The source impedance required by filter FL1 is set by R9.
The 1st 10.7 MHz IF filters FL1, FL2, and FL3 are linear phase monolithic ceramic filters that are
jumper-programmed for particular receiver configurations (MONO, WIDEBAND COMPOSITE, or
NARROWBAND COMPOSITE). C13, C14, and C15 allow a null adjustment of the filter distortion.
Amplifier U2 compensates for filter losses and buffers the impedance match between the 1st and
2nd IF filters.
In a similar fashion, the 2nd 10.7 MHz IF filters FL4 and FL5 are jumper-programmed for receiver
configurations (MONO or COMPOSITE). C21 and C22 allow a null adjustment of the filter
distortion. Amplifier U3 compensates for filter losses and buffers the impedance matching. L11
and C28 form a harmonic and noise filter for the 3rd mixer (U4).
The input to the 3rd mixer is mixed with the 13.7 MHz 3rd LO signal to produce the 3rd IF signal
at 3 MHz. The 3rd LO is comprised of crystal oscillator Q4 and buffer Q5. The 3rd mixer is also
double balanced and diplexed. The output signal is sent to the FM Demodulator module.
4.3.6 FM Demod (PCL6030/6060)
The FM Demod module performs three major functions:
1. Extraction of baseband information from the frequency modulated input signal
PCL6000
602-13375-01
Moseley PCL6000
4-19
2. Generation of DC metering signal proportional to the logarithm of the input RF carrier
over a three-decade range
3. Generation of a mute signal to squelch the receiver when the RF input signal is too
low for reliable operation
4.3.6.1 FM Demodulator
The 3 MHz RF signal at J3 is fed to a low-noise amplifier, U4, and its associated circuitry, where it
receives approximately 30 dB of voltage amplification. This signal passes through a 3 MHz
phase-linear bandpass filter (L8–L10 with C83 and C84). The output of this filter drives a highgain (60 dB) non-saturating symmetrical limiting amplifier U6. The amplitude-limited signal is then
fed to a precision charge count FM detector to extract the baseband information.
The FM detector operates as follows: Q15, Q16, and Q18 form a differential amplifier with Q13
and Q14 serving as constant-current collector loads. This amplifier has a gain in excess of 30 dB.
Q10 and Q17 in conjunction with diodes CR15 through CR17 form low-noise voltage clamps to
ensure non-saturating action of the differential amplifier transistors. The current outputs of the
differential amplifier alternately charge C62 and C63 through diodes CR12 and CR13. These
capacitors are then alternately discharged through Q11 and Q12, the total current being
proportional to the signal frequency. Q11 and Q12 serve as current-to-voltage converters whose
outputs are combined and integrated in a 500 kHz low-pass filter (L4 and L5 and associated
circuitry). The output from this filter contains the baseband information.
A two-stage low-noise amplifier (U5 and U1) then amplifies the baseband signal to a useful
system level. Jumper E1 sets the baseband gain to compensate for the differences in wideband
and narrowband transmitter deviation. Baseband Level Adjust R10 is set to deliver a 3.5 Vp-p
signal at J2 for an FM signal with 50 kHz (35 kHz in narrowband mode) deviation. This FM
detector is inherently wideband, linear, and adjustment free.
4.3.6.2 RF Signal Strength Detector
The RF signal from U4 is also sent to a four-stage successive limiting differential amplifier (Q2–
Q9) through a simple bandpass filter (L3 and C42). Each stage of this amplifier drives an
amplitude detector (CR7–CR10), which in conjunction with the summing amplifier U3, produces a
DC metering signal at J1-9 that is proportional to the logarithm of the RF input level over three
decades of amplitude. This voltage is used to indicate RF signal strength over the range of 3–
3000 µV on the front-panel meter. LOG GAIN control R67 is used to establish the linearity of the
signal sent to the Metering and Status module.
4.3.6.3 Mute Logic
The RF signal strength voltage from the log amplifier is also sent to comparator U2, which
compares this level to a preset reference voltage established by MUTE THRESHOLD ADJUST
(R22). Decreasing this reference voltage decreases the signal strength required to initiate the
mute condition. Whenever the logic circuitry is in the mute condition, MUTE threshold indicator
CR6 will glow red. A 2 dB hysteresis is built into the mute logic to eliminate “chattering” near the
mute threshold. Also network CR3, CR4, R16, R17, and C10 provide a fast-attack, slow-release
(1 ms and 1.5 seconds, respectively) to and from the mute mode to eliminate “thumps”. The mute
signal is brought out on J1-10 and J1-11.
4.3.7 Adjacent Channel Filter (PCL6060)
The Adjacent Channel Filter is an elliptical low-pass baseband filter that attenuates any high
frequency signals that could be demodulated by the FM Demod due to adjacent channel
PCL6000
602-13375-01
4-20
Module Characteristics
interference. These signals can cause slew-rate limiting in successive baseband processing
circuits. The filter module is jumper-programmable (E1 and E2) for composite or mono operation.
4.3.8 Channel Control Board (Multichannel Option)
The Channel Control Board is used to control the RF module frequency selection, provide front
panel display, and implement the remote control facilities for channel selection. The transmitter
version (indicated by “-1”) provides gain compensation for the FMO modulation sensitivity
variation with frequency change.
Mux IC (U4) selects either the front panel channel select switch (S1) or the CHANNEL REMOTE
INPUT (P1-1, -2, -3, -4), providing a BCD output to the address lines of the EPROMs (U1, U2,
U3) for channels 0–15. The remote input is toggled active by the REM ENABLE line (P1-5) which
also controls the RMT LED on the display (DP, upper left). Board mounted INTERNAL MODE
switch (S6) emulates the remote input function for internal security lockout of the front panel
channel selection.
Logic IC (U5) decodes and detects channel address number 0 to toggle between EPROM control
(PROM ENABLE) and on-board manual programming control (CHNL 0 ENABLE) via switches
S2, S3, S4, and S5. The EPROM outputs (PROM PROGRAM) are buffered by bus drivers U7,
U8, U9. The switch outputs are buffered by bus drivers U10, U11, U12. The driver outputs are
parallel connected (PROGRAM OUTPUT BUS) and enable bank switching of the outputs. When
channel number 0 is selected, the switches take control and the RF module may be programmed
for a user-specified frequency. The programming bits are assigned as shown in Table 4-2.
Table 4-2
Receiver Channel 0 Programming
PCL6000
602-13375-01
Bit Name
Assignment
Comments
N8
64 MHz
N7
32 MHz
N6
16 MHz
N5
8 MHz
N4
4 MHz
N3
2 MHz
N2
1 MHz
N1
500 kHz
N0
250 kHz
A3
200 kHz
A2
100 kHz
A1
50 kHz
A3
200 kHz
C5
“FIX” CAP ACTIVE
RF Module Circuit
C4
“F2” CAP ACTIVE
RF Module Circuit
C3
“F1” CAP ACTIVE
RF Module Circuit
Moseley PCL6000
4-21
The two-digit display (DGT1, DGT2) is controlled by the EPROM outputs D0–D4. D0 controls the
10's digit and D1–D4 (BCD DISPLAY) are decoded by U13 to provide the 1's display. For
systems with less than 16 channels, the display will blank and no programming is available.
DGT1 may be tested by shorting jumper E1 (DGT1 TEST).
Analog switch IC (U6) is used to compensate for modulation gain variations with frequency in the
FMO. Each pot adjustment (R12, R13, R14) is independent of each other and is factory set for
each system configuration. This circuit is not installed for receiver applications.
PCL6000
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4-22
Module Characteristics
This Page is intentionally blank.
PCL6000
602-13375-01
Moseley PCL6000
5-1
5 Alignment
5.1 Introduction
This section presents alignment procedures for the PCL6000 and a list of recommended test
equipment. Also included are descriptions of all module adjustments, general troubleshooting
information, and test fixture diagrams. Relevant troubleshooting information is included at the end
of each alignment procedure.
5.2 Test Equipment
Table 5-1 lists test equipment recommended for use in the alignment procedures. Equivalent
items of test equipment may also be used. Any test equipment that is used for RF measurements
must be rated for the frequency of operation and power levels that may be encountered.
Table 5-1
Recommended Test Equipment
Instrument
Frequency
Counter
Directional
Coupler
Attenuator,
Fixed
Attenuator,
Adjustable
RF Signal
Generator
Mixer
Audio
Oscillator
Suggested Model & Critical Specifications
Tektronix DC-508A 1.3 GHz
(For dual links on the same frequency, include Option 01.)
Single Link ± 5 ppm
Dual Link ± 0.2 ppm
Microlab/FXR CB-49N
30 dB, 1–2 GHz, 50 ohms
Philco 662A-30 or Sierra 661A-30
30 dB, 1 GHz, 50 ohms, 20 watts
Kay Elemetrics Model 432D
1,2,3,5,10,20 dB steps
50 ohm, 1 GHz
Hewlett-Packard Model 8640B with Options 01 & 02
Frequency Range: 0.5–1024 MHz
Residual FM:
30 Hz, 20 Hz–5 kHz
>10 Hz, 300 Hz–3 kHz
RF Level Accuracy: +3.5 dB, -7 to -47 dBm
+4.0 dB, -74 to -137 dBm
Output Impedance: 50 ohm
FM Deviation BW:
DC–250 kHz
Mini-Circuit 2AD-1
Hewlett-Packard 204C
Frequency Range: 100 Hz–200 kHz
Output Impedance: 600 ohm
PCL6000
602-13375-01
5-2
Alignment
Instrument
Distortion
Analyzer
RF Spectrum
Analyzer
Audio
Spectrum
Analyzer
Power Meter
and Sensor
Stereo
Generator
Stereo
Demodulator
Stereo Source
Selector
Oscilloscope
High Freq
Scope Probe
Multimeter
50 Hz Filter
600 ohm
Resistor
PCL6000
602-13375-01
Suggested Model & Critical Specifications
Hewlett-Packard 339A or
Tektronix AA501 w/ SG5050 and TM503 Main Frame
Residual Noise:
-92 dB (80 kHz)
Input Impedance:
100 ohm shunted by less than 100 pF
Accuracy:
20 Hz–20 kHz ±2%
10 Hz–110 kHz ±4%
Oscillator Frequency Range:10 Hz–110 kHz
Output Level:
3 VRMS into 600 ohm
Distortion:
10 Hz–20 kHz: -95 dB (0.00187%) THD
Hewlett-Packard Model 8559A with 18IT Display
Frequency Band:
0.01–3 GHz
Dynamic Range:
0.01–<70 dB
Display Range:
Log 10 dB and 1 dB/div
Display Accuracy:
Log > 2 dB (full range)
Input Impedance:
50 ohm
SWR:
1.3:1
10 dB input attenuation
Tektronix 7L5 with Option 25; L3 Plug-in; 7603 Main Frame
Input Impedance:
1M ohm/29 pF
Input Frequency:
10 Hz– >500 kHz
Display Range:
80 dB, log 10 dB/div
Hewlett-Packard 435A with 8481A Power Head
Accuracy:
± 1% of full scale
Power Range:-25 dBm (3 µW) to
+20 dBm (100 mW) full scale
Moseley SCG-9A or equivalent
Stereo SNR:
75 dB
Separation:
55 dB
THD:
0.1% or less
Belar Stereo Modulation Monitor or equivalent
Stereo SNR:
75 dB
Separation:
55 dB
THD:
0.5% or less
Moseley custom test equipment
Tektronix 465 or equivalent
Bandwidth:
100 MHz
Tektronix 100 MHz or equivalent
Fluke Model 77 or equivalent
See Figure 5-15
RN55D6000F 600 ohm 1% 1/4W
Moseley PCL6000
5-3
5.3 Alignment Procedures
The PCL6000 alignment procedures include the following:
5.3.1
5.3.2
5.3.3
5.3.4
5.3.5
5.3.6
5.3.7
5.3.8
5.3.9
5.3.10
5.3.11
STL Frequency Alignment
Receiver Sensitivity
Receiver Selectivity
Transmitter Deviation and Receiver Output Level Calibration
Ultimate Signal-to-Noise Ratio
Distortion Alignment
Stereo Separation and Signal-to-Noise Ratio
Stereo Crosstalk
STL frequency Change
FMO Adjustment
Transmitter Troubleshooting Procedure
5.3.1 STL Frequency Alignment
Description
The STL frequency is aligned by using a counter to measure the transmitter output frequency and
the receiver 1st LO frequency. A high-precision counter (±0.2 ppm) is recommended to align STL
links that are used in a redundant installation. If such a counter is not available, we recommend
that both STL systems be aligned at the same time using the same counter.
Procedure
1.
Connect the equipment as shown in Figure 5-1.
2.
Position the transmitter OPERATE/STANDBY switch to the OPERATE position. Verify
that the RADIATE, and AFC LOCK status LEDs are green.
Using the METER FUNCTION switch, select the FWD PWR position. Verify that the front
panel meter reads between -3 and +2 dB on the top scale.
3.
Check the serial number label on the back of the transmitter for its operating center
frequency. The counter should indicate the frequency within 8 kHz of the specified center
frequency. If it does not, proceed to the troubleshooting portion of this procedure and
verify that the 1st LO and FMO are operating at their specified frequencies (refer to
system data sheet supplied with the unit).
4.
While monitoring the counter, adjust the transmitter FMO frequency trim adjustment for a
reading of the specified transmitter frequency ±200 Hz.*
5.
The receiver 1st LO frequency for the 950 MHz band is 1020.000 MHz ± 8KHz (refer to
system data sheet to determine exact frequency of your unit).
6.
Calculate the receiver 2nd LO frequency by adding 10.700 to the 1st LO frequency and
subtracting the operating frequency (i.e., for a transmitter at 950.000 MHz, the 2nd LO is
(1020.000 + 10.700) - 950.000 = 80.700 MHz).
PCL6000
602-13375-01
5-4
7.
Alignment
Using the counter, adjust the receiver 2nd LO frequency adjustment for a reading within ±
200 Hz of the frequency calculated in Step 6.*
(Note: If two STL systems are installed for redundant operation, both should be aligned
for frequency at the same time.)
Figure 5-1 Test Setup for Frequency Alignment
Troubleshooting
1.
The crystal in the transmitter 1st LO should be to 102.000 MHz for the 950 MHz band
(refer to system data sheet to determine exact frequency of your unit).
2.
The crystal frequency of the receiver 1st LO should be the same as the PCL6010
transmitter 1st LO (except in the 1.7 GHz band, check the system specs)
3.
If the 1st LO fails to meet the ± 8 kHz specified in this procedure, the crystal oven should
be checked to ensure that it is operating at 65°C ± 5°C.*
4.
If the transmitter frequency fails to meet the ± 8 kHz specified in this procedure and the
1st LO appears to be operating to specification, the FMO should be checked to ensure
that it is operating at its designed frequency. The FMO frequency may be calculated as
follows:
For a High-Side LO (LO > CARRIER):
FMO frequency = (LO freq.) - (CARRIER freq)
For a Low-Side LO (LO < CARRIER):
FMO frequency = (CARRIER freq) - (LO freq.)
The FMO frequency should be within ± 1 kHz of the value calculated.*
5.
A red AFC LOCK status will cause the RADIATE status indicator to remain red.
* Multichannel Option: The FMO and 2nd LO are aligned for exact frequency operation (within
±200 Hz of the indicated synthesizer switch settings). To align the STL to the exact carrier
frequency of the channel, adjust the 1st LO XTAL tuning capacitor C84.
PCL6000
602-13375-01
Moseley PCL6000
5-5
5.3.2 Receiver Sensitivity
Description
The sensitivity of the PCL6000 receiver is verified using a signal generator and either a deemphasis network or a de-emphasized stereo demodulator.
Figure 5-2
Sensitivity Test Setup
PCL6000
602-13375-01
5-6
Alignment
Procedure
1. Connect equipment as shown in Figure 5-2. Set the controls on the signal generator as
follows:
Meter Level
Volts
AM Modulation
Off
FM Deviation
Off
Frequency
Tuned to center freq (indicated on rear of receiver)
Output Level
-40 dBm (adjust output level for a reading of 3 mV on the
signal generator meter)
RF
On
2. Using the METER FUNCTION switch on the PCL6000 Receiver, select the RF LEVEL
meter position. Verify that the meter reads within the 3 K range of the middle scale.
3. While monitoring the center scale of the receiver meter, switch the OUTPUT LVL ADJ on
the signal generator from -40 to -110 and verify that the signal strength reads within the
meter range for each setting. If it does not, proceed to Section 5.4.10, FM Demod
(PCL6030/6060), Log Gain Adjust, prior to continuing the test, and perform the calibration
adjustments given there. (The PCL6020 system log gain is not adjustable.)
4. Using the METER FUNCTION switch on the receiver, select the PGM LVL position.
Set FM Deviation on the RF Signal generator to ON.
Set the modulation frequency on the signal generator to 400 Hz.
Adjust the deviation control on the signal generator so that the meter on the receiver
reads 0 dB on the top scale. Verify that the deviation on the signal generator reads 50 ± 1
kHz.
5. Set the controls on the distortion measurement equipment for a 0 dB reference.
Set the FM Deviation on the RF signal generator to OFF.
Position the controls on the distortion measurement equipment for a reading of 60 dB
SNR.
Reduce the RF LVL adjustment on the RF signal generator until the distortion
measurement equipment reads 60 dB.
Observe the RF level output of the signal generator; it should indicate less than 20 µV.
6. Set the controls on the distortion measurement equipment for a signal-to-noise ratio of 40
dB.
Reduce the RF level on the signal generator until the mute threshold LED on the IF
Demod (PCL6020) or FM Demod (PCL6030/6060) module indicates red. Observe the RF
level output of the signal generator; it should indicate between 18 and 22 µV. If not, the
MUTE THRESHOLD ADJ on the IF Demod (PCL6020) or FM Demod (PCL6030/6060)
module should be rotated fully counterclockwise. Then set the RF level output of the
signal generator to 20 µV and adjust the MUTE THRESHOLD ADJ until the mute
threshold LED changes from off to red.
PCL6000
602-13375-01
Moseley PCL6000
5-7
Troubleshooting Notes:
The cable between the RF signal generator and the receiver should be kept at a minimum to
reduce insertion loss. As an example, a 3-foot cable (RG-58) will cause a 1 dB or 10% loss in
signal at 950 MHz.
5.3.3 Receiver Selectivity
Description
The receiver selectivity is verified using an RF signal generator.
Procedure
1.
Connect the equipment as shown in Figure 5-3. Set the controls on the signal
generator as follows:
Meter Level
Volts
AM Modulation
Off
FM Deviation
Off
Frequency
Tuned to the center frequency (indicated on the serial
number label on the rear panel).
Multichannel Option: Tune to the channel frequency indicated on the “Channel
Assignments” label on the rear panel.
Output Level
-40 dBm (adjust the output level for a reading of 3 mV on
the signal generator meter)
RF
On
ANTENNA
RF SIGNAL
GENERATOR
RECEIVER
(MD1036)
Figure 5-3
Selectivity Test Setup
2.
Using the receiver METER FUNCTION switch, select the RF LVL meter position. Verify
that the meter reads within the 3 K range of the middle scale.
3.
Position the OUTPUT LEVEL switch on the signal generator to -100. Verify that the
receiver meter reads within the 3 µV range on the center scale. Note the position of the
meter reading as a reference for the -60 dB point.
4.
Position OUTPUT LEVEL on the signal generator to -40. Increase the frequency on the
signal generator until the meter reading on the receiver front panel is the same as the
value noted in paragraph 3. Subtract the carrier frequency from the value indicated on the
signal generator. The value calculated indicates the positive -60 dB point.
5.
Decrease the frequency on the signal generator until the meter reads the same as the
value noted in paragraph 3. Subtract the frequency indicated on the signal generator from
the center frequency. This value indicates the negative -60 dB bandwidth point.
PCL6000
602-13375-01
5-8
Alignment
6.
The bandwidth calculated in steps 3 and 4 should be no greater than ± 400 kHz.
Specification (PCL6020)
Bandwidth
1st 10.7 MHz IF
2nd 10.7 MHz IF
± 90 KHz
1.5 dB
3 dB
±400 KHz
30 dB
60 dB
± 1 MHz
70 dB
80 dB
Specification (PCL6030/6060)
Bandwidth
Wideband
Narrowband
3 dB
±100 kHz
+75 kHz
60 dB
±450 kHz
±350 kHz
80 dB
±1 MHz
±1 MHz
Note: The Wideband/Narrowband filter bandwidth can be selected in the PCL6030/6060 system
by properly positioning jumpers E2 and E3 in the Double Converter/LO3 module
Troubleshooting Notes
The cable between the RF signal generator and the receiver should be kept at a minimum to
reduce insertion loss. As an example, a 3-foot cable (RG-58) will cause a 1 dB or 10% loss in
signal at 950 MHz.
5.3.4 Transmitter Deviation and Receiver Output Level Calibration
Description
The deviation and modulation sensitivity of the composite information is aligned using a Bessel
null function as a reference. The MUX channel is aligned using an RF generator as a reference.
Procedure
1.
Connect the equipment as shown in Figure 5-4.
2.
Adjust the audio oscillator of the distortion analyzer as follows:
a. Position the meter function switch to the oscillator level position and adjust the
oscillator level controls for an output voltage of 1.25 VRMS (composite), 1.00 VRMS
(mono).
b. Using the counter to monitor the oscillator frequency, position the frequency
controls for 20.79 kHz (composite), 16.62 kHz (mono).
3.
Position the transmitter OPERATE/STANDBY switch to the OPERATE position.
PCL6000
602-13375-01
Moseley PCL6000
5-9
Using the METER FUNCTION switch, select the FWD PWR position and verify that
the meter reads between -3 dB and +2 dB on the top scale.
4.
Using the spectrum analyzer, monitor the modulated RF output of the transmitter. The
controls of the spectrum analyzer should be in the following positions:
Frequency Band GHz
.01–3
Time/DIV
Auto
Trigger
Free run
FREQ/SPAN/DIV
50 kHz/DIV with 3 kHz bandwidth
Input ATTEN
30
REF Level
-20
10 dB/DIV
Depress
Tuning
Transmitter center frequency
Figure 5-4
Test Setup For Deviation Alignment
5.
Disconnect the program input to the transmitter and adjust display on the spectrum
analyzer so that the waveform is at the top graticule (see Figure 5-5).
Reconnect the program input of the transmitter. The display on the spectrum analyzer
should be similar to Figure 5-5.
Adjust COMP PGM LVL (R28) or MONO PGM LVL (R199) on the Audio/Power
Supply board for a Bessel null of at least -50 dB on the spectrum analyzer.
PCL6000
602-13375-01
5-10
Alignment
Using the METER FUNCTION switch on the transmitter, select the PGM LVL position.
Adjust COMP PGM MTRG (R201) or MONO PGM MTRG (R202) as is necessary on
the Audio/Power Supply board for a reading of 0 dB on the top scale of the meter.
Figure 5-5a Bessel Null Function Waveform
Figure 5-5b Function Waveform Bessel Null
6.
Using the METER FUNCTION switch on the receiver, select the RF LVL position.
Position the switches on the adjustable attenuator for an RF level reading between 1
K and 3 K on the receiver meter.
Set the controls on the distortion analyzer as follows:
PCL6000
602-13375-01
Moseley PCL6000
5-11
Meter Function
Reference level
Frequency
1.0 kHz
Meter Input Range
+10 dB
With the oscillator output connected to the transmitter, connect the meter input in
parallel with the oscillator output and adjust the Relative Adjust control for a 0 dB
reference on the distortion analyzer.
Reconnect the distortion analyzer input to the program output of the receiver.
PCL6020: On the receiver IF Demod module, adjust BASEBAND LVL ADJUST (R19)
for a reading of 0 dB on the distortion measurement test set.
PCL6030/6060: On the receiver FM Demod module, adjust BASEBAND LVL ADJUST
(R10) for a reading of 0 dB on the distortion measurement test set.
Using the receiver METER FUNCTION switch, select the PGM LVL position and
adjust PGM LVL (R171) on the RX Audio/Power Supply board for a reading of 0 dB
on the top scale.
7.
Position the transmitter OPERATE/STANDBY switch to the STANDBY position.
Connect the equipment as shown in Figure 5-6 and adjust the controls on the RF
signal generator as follows:
Meter Function
FM
AM
OFF
Modulation Freq.
110 kHz
FM
10 kHz
Output Level
-40
Frequency Tune
Tune to the center frequency (specified on serial number
label of receiver).
Peak Deviation
Adjust FM control for a meter reading of 5 kHz.
While monitoring the oscilloscope, adjust MUX Level. Adjust R31 on the receiver
Audio and Power Supply board for a reading of 1.5 Vp-p.
Using the receiver METER FUNCTION switch, select the MUX LVL position.
Adjust R12 on the RX Audio/Power Supply board for a reading of 5 on the lower scale
of the receiver meter.
PCL6000
602-13375-01
5-12
Alignment
Figure 5-6
Test Setup for MUX Channel Alignment
8.
On the RF signal generator, adjust the modulation frequency to 67 kHz and the FM
deviation for 6.0 kHz.
Note the reading on the receiver meter. It should be between 6 and 8 on the lower
scale. This reading will be used as a reference to align the transmitter MUX 2
deviation. Connect the output of the adjustable attenuator to the RF input of the
receiver.
9.
Position the transmitter OPERATE/STANDBY switch to the OPERATE position.
Using the scope, adjust the output of the audio oscillator for a voltage of 1.5 Vp-p and
a frequency of 110 kHz (26 kHz mono). Connect the audio oscillator output to the
MUX 1 input of the transmitter.
Adjust the MUX 1 Level Adjust R29 on the Audio/Power Supply board for a reading of
5 on the lower scale of the receiver meter.
Using the transmitter METER FUNCTION switch, select the MUX LVL position.
Adjust R159 on the TX Audio/Power Supply board for a reading of 5 on the meter
lower scale.
Connect the audio oscillator to the transmitter MUX 2 input and adjust the oscillator to
a frequency of 185 kHz (composite only).
Using the receiver meter as a reference, on the Audio/Power Supply board, adjust
MUX 2 Level Adjust R40 for the reading noted in paragraph 8. The meter reading on
the transmitter front panel should be between 6 and 8 on the lower scale.
PCL6000
602-13375-01
Moseley PCL6000
5-13
Troubleshooting
1.
When aligning systems as a dual or redundant installation, one transmitter should be
used as a reference. In this case, the second transmitter would be aligned using the first
receiver as a reference. The second receiver would be aligned using the first transmitter
as a reference. As a final verification, the second transmitter would be checked using the
second receiver. Using any combination of transmitter and receiver, the composite band
should be flat within ±0.1 dB. The results from the MUX band measurements should be
within 10%.
2.
The MUX output is lowest when the carrier center frequency of the transmitter and
receiver are identical.
5.3.5 Ultimate Signal-to-Noise Ratio
Description
The STL ultimate wideband (50 Hz to 15 kHz) SNR, is verified using a distortion analyzer. The
receiver SNR (quieting) is verified during the receiver sensitivity test (see Section 5.3.2).
Procedure
1.
2.
Connect the equipment as shown in Figure 5-7 and set the controls on the distortion
measurement test set as follows:
Meter Function
REF Level
Meter Input
+10 dBm
Frequency
400 Hz
Set the controls on the transmitter as follows:
OPERATE/STANDBY OPERATE (Radiate LED green)
METER FUNCTION
PGM LVL
3.
Using the METER FUNCTION switch on the receiver, select the PGM LVL position.
4.
Adjust the oscillator output level on the distortion measurement test set for a reading of 0
dB on the top scale of the transmitter meter.
Rotate the REFERENCE ADJUST on the distortion measurement test set for a 10 dB
reference on its front-panel meter. Disconnect the composite input at the transmitter rear
panel.
Using the INPUT RANGE switch on the distortion measurement test set, measure the
ultimate wideband SNR. (Note: The reference is +10 dB; hence, a meter input range
indicating -60 and a meter reading of -6 would indicate an SNR of -76 dB.)
5.
Position the INPUT RANGE switch to +10 dB and reconnect the program input to the
transmitter composite BNC connector.
PCL6000
602-13375-01
5-14
Alignment
Figure 5-7
Test Setup For Signal-To-Noise Ratio Measurement
Troubleshooting
1.
If the STL link fails to meet the ultimate SNR specification, the sensitivity test (paragraph
5.3.2) should be performed on the receiver prior to troubleshooting the transmitter.
2.
If the STL link fails to meet the SNR specification, and the transmitter is suspected, the
following method may be used to help isolate the problem:
a.
Using the 80 kHz filter on the distortion measurement test set, measure the
baseband output of the TX Audio/Power Supply board for a reading at least 5
dB greater than specified for the ultimate SNR.
b.
Substitute the 1st LO signal (1020 MHz for the 950 MHz band) using an RF
signal generator such as the HP 8640B at an output level of +10 dBm.
c.
Substitute the FMO signal using the RF signal generator at an RF level of 0
dBm.
5.3.6 Distortion Alignment
Description
A distortion analyzer is used to align the receiver 10.7 MHz IF filters for minimum distortion. This
method assumes the FMO will contribute a negligible amount of distortion to the overall reading.
PCL6000
602-13375-01
Moseley PCL6000
5-15
The FMO distortion can be verified independently of the receiver by referring to Section 5.3.10
(FMO Adjustment).
Figure 5-8
Test Setup for Distortion Alignment
Procedure
1.
2.
Connect the equipment as shown in Figure 5-8 and adjust controls on the distortion
measurement test set as follows:
Meter Function
Input level
Filters
400 Hz - In; 80 kHz - In
Distortion Range
0.3%
Input Range
+10 dB
Frequency
1.0 kHz
Oscillator Level
+10 dBm from 600 ohm source
Position the OPERATE/STANDBY switch on the transmitter to the OPERATE position.
The RADIATE status LED should be green. Using the METER FUNCTION switch on the
transmitter, select the FWD PWR position and verify that the meter reads between -3 and
+2 dB on the top scale.
Using the METER FUNCTION switch on the transmitter, select the PGM LVL function and
verify that the meter reads between -1 and +1 dB on the top scale.
3.
Using the METER FUNCTION switch on the receiver, select the RF LVL function.
PCL6000
602-13375-01
5-16
Alignment
Position the switches on the adjustable attenuator for a reading between 1 k and 3 k
microvolts on the middle scale of the receiver meter.
Using the METER FUNCTION switch on the receiver, select the PGM LVL function. The
meter should read between -1 and +1 dB on the top scale.
Set the frequency to 15 kHz and verify that the meter of the distortion measurement test
set reads between .9 and 1.1 VRMS.
Adjust the METER FUNCTION switch on the distortion measurement test set to the
DISTORTION position.
4.
Using the distortion measurement test set, adjust the following controls on the IF Demod
(PCL6020) or Double Converter/LO3 (PCL6030, PCL6060) for minimum distortion:
PCL6020:
a.
1ST 10.7 MHz IF ADJ
b.
2ND 10.7 MHz IF ADJ
PCL6030/6060: a.
b.
1ST 10.7 MHz IF ADJ (MONO, WB COMP, NB COMP)
2ND 10.7 MHz IF ADJ (MONO, COMP)
Check the receiver configuration to verify which filter adjustments; MONO (monaural), WB COMP
(wideband composite), or NB COMP (narrowband composite) pertain to your system.
5.
The distortion reading should now be less than 0.2%. Switch the frequency on the
distortion measurement test set to 1.0 kHz. Verify that the distortion reading meets
specifications.
Troubleshooting
1.
The following procedure may be used to determine if the 10.7 MHz filters are a source of
high distortion.
a.
PCL6020: Remove FL1 and FL2 from the IF Demod module and replace it with a
1.0 K ohm resistor. The resistor leads should first be cut between 0.3 and 0.4 inch
from the body. The ends of the resistor leads should then be flattened using a pair
of needle-nose pliers so they can be inserted in the filter sockets. The cover
should then be replaced.
PCL6030/6060: Remove the appropriate ceramic filters FL1 and FL4 (Monaural),
FL2 and FL5 (Wideband Composite), or FL3 and FL5 (Narrowband Composite)
from the Double Converter/LO3 module and replace it with a 1.0 K ohm resistor.
The resistor leads should first be cut between 0.3 and 0.4 inch from the body. The
ends of the resistor leads should then be flattened using a pair of needle-nose
pliers so they can be inserted in the filter sockets. The cover should then be
replaced.
b.
Using the distortion measurement test set, the distortion reading should now be
less than 0.27% at 15 kHz. If it is not, additional troubleshooting will be required
prior to determining the performance of the 10.7 MHz IF filters.
2.
An RF input to the receiver exceeding 6 mV may cause an indication of high distortion.
3.
The distortion of the Audio/Power Supply board in the receiver can be tested
independently by applying the output of the distortion analyzer's audio oscillator to the
baseband input of the Audio/Power Supply board.
PCL6000
602-13375-01
Moseley PCL6000
5-17
5.3.7 Stereo Separation and Stereo Signal-to-Noise Ratio
Description
The stereo separation alignment is accomplished using a stereo generator and demodulator of
known quality and an audio spectrum analyzer with tracking generator.
Figure 5-9
Stereo Separation Test Setup
Procedure
1.
Connect the equipment as shown in Figure 5-9. This test should be run flat; i.e., the
stereo generator pre-emphasis and the stereo demodulator de-emphasis should be
switched out. If this cannot be accomplished, the system modulation reference level
should be reduced to -20 dB at 400 Hz. Adjust the controls on the audio spectrum
analyzer as follows:
Frequency
Far left graticule
Dot Frequency
Zero Hz
LOG
10 dB/DIV
Source
FREE RUN
Mode
NORM
PCL6000
602-13375-01
5-18
2.
Alignment
Termination
1 Megohm
REF
dBV
Resolution
Coupled
SPAN/DIV
2 kHz
Time/DIV
Auto
Tracking GEN
ON
Set the OPERATE/STANDBY switch on the transmitter to the OPERATE position. Verify
that the RADIATE LED is green.
Using the METER FUNCTION switch on the transmitter, select the FWD PWR position.
Verify that the meter reads between -3 and +2 dB on the top scale.
Using the METER FUNCTION switch on the transmitter, select the PGM LVL position.
Adjust the dot frequency on the audio spectrum analyzer to 1.0 kHz and the SPAN/DIV to
zero.
Adjust the level control on the audio spectrum analyzer for a reading of zero dB on the top
scale of the transmitter meter.
Set the dot frequency on the audio spectrum analyzer to zero and the SPAN/DIV to 2
kHz.
Using the METER FUNCTION switch on the receiver, select the RF LVL position.
Position the switches on the adjustable attenuator for a reading between 1 K and 3 K on
the receiver meter middle scale.
Using the METER FUNCTION switch on the receiver, select the PGM LVL position. Verify
that the meter reads within ±1 dB of the transmitter meter.
3.
Select the LEFT ONLY position on the stereo source selector.
Adjust the step and variable attenuators on the audio spectrum analyzer so that the
waveform is at the top graticule. (See Figure 5-10.)
Select the RIGHT ONLY position on the stereo source selector.
Adjust COMP HF TILT (R7) on the RX Audio/Power Supply board for maximum
separation between 1 and 5 kHz.
Adjust DELAY EQ (R111) on the RX Audio/Power Supply board for maximum separation
between 10 and 15 kHz. (See Figure 5-10.)
Using the SAVE A function on the audio analyzer, store this waveform.
Verify that the separation meets specification between 1 kHz and 15 kHz.
Stereo separation: Measurement of the worst case ratio in dB of residual signal in the stereo
demodulated right channel referred to the demodulated left channel with a left-only driving signal
for frequencies between 30 Hz and 15 kHz; the procedure is repeated for right to left channel
separation.
4.
Connect the spectrum analyzer to the right output of the stereo demodulator.
Select the RIGHT ONLY position on the stereo source selector. Adjust the step and
variable attenuators on the audio spectrum analyzer so that the waveform is at the top
graticule. (See Figure 5-10.)
PCL6000
602-13375-01
Moseley PCL6000
5-19
Select the LEFT ONLY position on the stereo source selector. Verify that the separation
meets specification between 1 kHz and 15 kHz.
Vert = 10 dB/div
Horz = 2 KHz/div
Figure 5-10
Swept Separation Waveform
Note: The COMP HF TILT and DELAY EQ module affect both the left and right channel
separation. Paragraphs 3 and 4 may be repeated to assure optimum performance on both
channels.
5.
Connect the audio output of the distortion analyzer to the stereo source selector. Connect
the left output of the stereo demodulator to the input of the distortion analyzer.
Set the frequency on the distortion measurement test set to 1 kHz. Select the LEFT +
RIGHT position on the stereo source selector.
Adjust the output level on the distortion measurement test set for a reading of zero dB on
the top scale of the transmitter. Using the METER FUNCTION switch on the receiver,
select the PGM LVL position and verify that the meter reads within ± 1 dB of the
transmitter program level.
Adjust the input controls on the distortion measurement test set for a zero dB reference.
Set the frequency on the distortion measurement test set to 30 Hz.
Verify that the reference on the distortion measurement test set is ± 0.5 dB.
Select the RIGHT ONLY position on the stereo source selector. Using the input attenuator
on the distortion measurement test set, measure the separation.
Adjust COMP LF TILT (R61) on the RX Audio/Power Supply board for maximum
separation.
PCL6000
602-13375-01
5-20
Alignment
Verify the separation at 50, 100 and 500 Hz.
6.
Connect the input of the distortion analyzer to the right channel of the stereo demodulator.
Position the input range and relative ADJ controls on the distortion analyzer for a zero dB
reference.
Select the RIGHT ONLY position on the stereo source selector and, if required, adjust the
zero dB reference on the distortion analyzer.
Select the LEFT ONLY position on the stereo source selector.
Using the input range controls on the distortion analyzer, measure the right channel
separation.
Note: The COMP LF TILT adjustment affects both channels. Paragraphs 5 and 6 may be
repeated several times to optimize this setting.
7.
Stereo signal-to-noise ratio. This test should be run using the normal 75 µs de-emphasis
characteristics of the stereo demodulator.
Connect the audio output of the distortion analyzer to the stereo source selector.
Set the stereo source selector to the LEFT + RIGHT position.
Using the 50 Hz high-pass filter, connect the left channel of the stereo demodulator to the
distortion analyzer input.
Using the METER FUNCTION switch on the STL transmitter, select the PGM LVL
position.
Adjust the output of the audio oscillator on the distortion analyzer for a frequency of 400
Hz.
Adjust the output level on the distortion analyzer so that the transmitter meter reads zero
dB on the top scale.
Using the METER FUNCTION switch on the receiver, select the PGM LVL position, and
verify that the meter reads within ±1 dB of the transmitter meter.
Adjust the input range and relative ADJ controls on the distortion analyzer for a zero dB
reference on its meter.
Position the stereo source selector to the OFF position.
Measure the stereo demodulated signal-to-noise ratio for the left channel using the input
range control on the distortion analyzer.
Using the 50 Hz high-pass filter, connect the input of the distortion analyzer to the right
channel and repeat the test.
Troubleshooting
The performance of the stereo generator and stereo demodulator can be verified by connecting
the output of the stereo generator directly to the input of the stereo demodulator.
PCL6000
602-13375-01
Moseley PCL6000
5-21
5.3.8 Stereo Crosstalk
Description
The crosstalk measurements are made using a stereo generator of known quality, a low-distortion
audio oscillator, and an audio spectrum analyzer.
Figure 5-11
Stereo Crosstalk Setup
Procedure
1.
Connect the equipment as shown in Figure 5-11. This test should be run with the stereo
generator pre-emphasis switched out.
2.
Set the OPERATE/STANDBY switch on the transmitter to the OPERATE position. The
RADIATE status LED should be green.
Using the METER FUNCTION switch, select the FWD PWR position, and verify that the
meter of the transmitter reads between -3 and +2 dB on the top scale.
Using the METER FUNCTION switch on the transmitter, select the PGM LVL position.
Adjust frequency controls on the distortion analyzer for a value of 15 kHz.
Adjust the oscillator output level on the distortion analyzer so that the transmitter meter
reads zero dB on the top scale.
3.
Using the METER FUNCTION switch on the receiver, select the RF LVL position.
Position the switches of the adjustable attenuator so that the receiver meter reads
between 1K and 3K on the middle scale.
Using the METER FUNCTION switch on the receiver, select the PGM LEVEL position.
Verify that the receiver meter reads between -1 and +1 dB on the top scale.
4.
Position the controls on the audio spectrum analyzer as follows:
PCL6000
602-13375-01
5-22
5.
Alignment
DOT MARKER
Dot on far left graticule
DOT FREQUENCY
Zero Hz
LOG
10 dB/DIV
SOURCE
Free run
MODE
NORM
RESOLUTION
Coupled
SPAN/DIV
5 kHz
TIME/DIV
AUTO
TERMINATION
1 Megohm
REF
dBV
Measure the stereo crosstalk as follows:
a.
Using the attenuator on the audio spectrum analyzer, adjust the 15 kHz waveform
to the top graticule. (See Figure 5-12a.)
b.
Calculate the main channel to subchannel crosstalk by measuring the indicated
waveforms and using the formula shown in Figure 5-12a.
c.
Adjust the frequency of the distortion measurement test set to 7.5 kHz.
d.
Position the stereo source selector to the left minus right position.
e.
Calculate the subchannel to main channel crosstalk by measuring the indicated
waveforms and using the formula shown in Figure 5-12.
Troubleshooting
1.
The stereo generator's performance can be verified by connecting output to the input of
the audio spectrum analyzer and performing the tests specified in step 5 above.
2.
If the STL link is identified as the source of excessive stereo crosstalk, the following steps
should be taken:
PCL6000
602-13375-01
a.
Verify that the cover is on the RF amplifier and install the covers on the
transmitter and receiver using at least two screws.
b.
Ensure that the transmitter and receiver are more than 2 feet apart.
c.
Verify that distortion meets specification, using the procedure shown in
paragraph 5.3.6.
Moseley PCL6000
5-23
VERT = 10 dB/div, HOR = 5 kHz/div
A = 15 kHz L+R ref. level
B = 2nd harmonic distortion level at 30 kHz
Nonlinear crosstalk main to sub =
the difference in dB between level A and level
B (60 dB in this example).
Figure 5-12a Nonlinear Crosstalk, Main to Sub
VERT = 10 dB/div, HOR = 5 kHz/div
CL and CU = lower and upper L-R sideband
level at 30.5 kHz and 45.5 kHz.
D = intermodulation product at 15 kHz
E = linear (vector) crosstalk at 7.5 kHz; this
signal is a product of the stereo
generator
Figure 5-12b Nonlinear Crosstalk, Sub to Main
Nonlinear crosstalk sub to main = the
difference in dB between level CL or CU and
level D + 6 dB (60 dB in this example).
Nonlinear crosstalk: Measurement of the ratio in dB of harmonic products in the subchannel
referred to 15 kHz L+R at 100% modulation in the main channel (M&S); measurement of the ratio
in dB of intermodulation products in the main channel referred to 7.5 kHz L-R at 100% modulation
in the subchannel (S&M).
5.3.9 STL Frequency Change
5.3.9.1 Quick Frequency Change Procedure
This simplified procedure is intended for users with prior experience in changing STL frequency.
This guide covers the switch settings for the 950 MHz band products only. For frequencies not
listed and for all other users refer to the detailed instructions that follow in Sections 5.3.9.2 for the
transmitter and 5.3.9.3.
1. Remove RF Modules from respective units, transmitter and receiver. Remove the cover
from component side of module.
2. Determine the switch settings from Table 5-2 “Frequency Selection Chart – 950 MHz
Band” given below and set switches S0 to S3 accordingly on both transmitter and receiver
RF Modules.
PCL6000
602-13375-01
5-24
Alignment
Table 5-2
Frequency Selection Chart – 950 MHz band
Receiver
Transmitter
Receiver
Transmitter
Channel
Channel
Freq (MHz) S0 S1 S2 S3 S0 S1 S2 S3 Freq (MHz) S0 S1 S2 S3 S0 S1 S2 S3
PCL6000
602-13375-01
944
1
5
A
8
1
3
0
0
950
1
4
2
8
1
1
8
0
944.125
1
5
A
3
1
2
F
5
950.125
1
4
2
3
1
1
7
5
944.375
1
5
9
3
1
2
E
5
950.375
1
4
1
3
1
1
6
5
944.5
1
5
8
8
1
2
E
0
950.5
1
4
0
8
1
1
6
0
944.625
1
5
8
3
1
2
D
5
950.625
1
4
0
3
1
1
5
5
944.875
1
5
7
3
1
2
C
5
950.875
1
3
F
3
1
1
4
5
945
1
5
6
8
1
2
C
0
951
1
3
E
8
1
1
4
0
945.125
1
5
6
3
1
2
B
5
951.125
1
3
E
3
1
1
3
5
945.375
1
5
5
3
1
2
A
5
951.375
1
3
D
3
1
1
2
5
945.5
1
5
4
8
1
2
A
0
951.5
1
3
C
8
1
1
2
0
945.625
1
5
4
3
1
2
9
5
951.625
1
3
C
3
1
1
1
5
945.875
1
5
3
3
1
2
8
5
951.875
1
3
B
3
1
1
0
5
946
1
5
2
8
1
2
8
0
952
1
3
A
8
1
1
0
0
946.125
1
5
2
3
1
2
7
5
952.5
1
3
8
8
1
0
E
0
946.375
1
5
1
3
1
2
6
5
953
1
3
6
8
1
0
C
0
946.5
1
5
0
8
1
2
6
0
953.5
1
3
4
8
1
0
A
0
946.625
1
5
0
3
1
2
5
5
954
1
3
2
8
1
0
8
0
946.875
1
4
F
3
1
2
4
5
954.5
1
3
0
8
1
0
6
0
947
1
4
E
8
1
2
4
0
955
1
2
E
8
1
0
4
0
947.125
1
4
E
3
1
2
3
5
955.1125
1
2
E
3
1
0
3
5
947.375
1
4
D
3
1
2
2
5
955.5
1
2
C
8
1
0
2
0
947.5
1
4
C
8
1
2
2
0
956
1
2
A
8
1
0
0
0
947.625
1
4
C
3
1
2
1
5
956.1875
1
2
A
0
0
F
F
2
947.875
1
4
B
3
1
2
0
5
956.5
1
2
8
8
0
F
E
0
948
1
4
A
8
1
2
0
0
956.875
1
2
7
3
0
F
C
5
948.125
1
4
A
3
1
1
F
5
957
1
2
6
8
0
F
C
0
948.375
1
4
9
3
1
1
E
5
957.25
1
2
5
8
0
F
B
0
948.5
1
4
8
8
1
1
E
0
957.5
1
2
4
8
0
F
A
0
948.625
1
4
8
3
1
1
D
5
957.625
1
2
4
3
0
F
9
5
948.875
1
4
7
3
1
1
C
5
958
1
2
2
8
0
F
8
0
949
1
4
6
8
1
1
C
0
958.5
1
2
0
8
0
F
6
0
949.125
1
4
6
3
1
1
B
5
959
1
1
E
8
0
F
4
0
949.375
1
4
5
3
1
1
A
5
959.5
1
1
C
8
0
F
2
0
949.5
1
4
4
8
1
1
A
0
959.8
1
1
B
6
0
F
0
8
949.625
1
4
4
3
1
1
9
5
959.9375
1
1
B
0
0
F
0
2
949.875
1
4
3
3
1
1
8
5
Moseley PCL6000
5-25
3. Put meter switch in AFC LVL position and adjust AFC for centerscale on the front panel
meter. The test point/feedthrough marked “AFC LVL” on the RF Module should read +7
VDC.
AFC Adjustment
F1 AFC ADJ (C34) is enabled by switch S4-2. When enabled, LED indicator
CR6—visible through the side of the module—will illuminate.
F2 AFC ADJ (C30) is enabled by switch S4-3. When enabled, LED indicator
CR5—visible through the side of the module—will illuminate.
Both adjustments are typically enabled at the same time.
C26 (fixed cap) is enabled by switch S4-4. Enable this switch when operating at
950 MHz or higher.
4. Transmitter:
Connect the transmitter dummy load/attenuated output to the frequency counter.
Allow 5 minutes for the crystal oven to stabilize. Adjust 1st LO XTAL tuning capacitor
C84 in the RF module to set the new output carrier frequency within 25 kHz of the
switch setting.
5. Receiver:
Adjust 70 MHz bandpass filter capacitors C41, C44, and C47 (IF Demod module,
PCL6020) or C40, C43, C46, and C49 (Double Converter/LO3 module, PCL6030/6060)
for a peak reading on the RF LVL meter position. These adjustments are found through
access holes at the top of the module.
6. Put the cover back on the RF modules (they are a tight fit by design) and reinstall the
modules in the transmitter and receiver.
5.3.9.2 Transmitter Procedure
Note: Check the schematics of the RF module pertaining to the frequency range of the system
being modified. If the frequency change falls outside of the original range listed, the 1st LO crystal
frequency must be changed. Consult the factory if this is the case.
(Multichannel Option: If this is a multichannel system, refer to Section 5.3.9.4)
1.
Connect 50 ohm high power dummy load to transmitter RF output.
2.
Remove RF Module from transmitter. Remove the cover from component side of
module.
3.
a. Calculate the FMO frequency as follows (check the system data sheet for the
exact frequency):
PCL6000
602-13375-01
5-26
Alignment
For a High-Side LO (LO > CARRIER):
FMO frequency = (LO freq) - (CARRIER freq)
For a Low-Side LO (LO < CARRIER):
FMO frequency = (CARRIER freq) - (LO freq)
b. Program the synthesizer switches (S4-1, S1, S2, S3) in the RF module for the
correct frequency.
Please refer to the Synthesizer Frequency Calculation Example in Section
5.3.9.3.
4.
Put meter switch in AFC LVL position and adjust AFC for centerscale on the front panel
meter. The test point/feedthrough marked “AFC LVL” on the RF Module should read +7
VDC.
AFC Adjustment
F1 AFC ADJ (C34) is enabled by switch S4-2. When enabled, LED indicator
CR6—visible through the side of the module—will illuminate.
F2 AFC ADJ (C30) is enabled by switch S4-3. When enabled, LED indicator
CR5—visible through the side of the module—will illuminate.
Both adjustments are typically enabled at the same time and both tune AFC.
C26 (fixed cap) is enabled by switch S4-4. Enable this switch when operating at
950 MHz or higher.
5a.
950 MHz band: If the new frequency is within the 940–960 MHz range, there is no need to
adjust the IPA and RFA filters. If the new frequency is outside of this range, peak the
internal pc board mounted filters FL-12 and FL-11 for maximum IPA LVL meter reading.
Peak the external filter FL2 (mounted underneath the Audio/Power Supply board) for
maximum FWD PWR meter reading.
5b.
220–450 MHz band: Peak the external helical filter FL4 for maximum IPA LVL meter
reading. Peak the external filter FL2 for maximum FWD PWR meter reading. Check the
transmitter assembly drawing to verify the proper filter before tuning.
5c.
1.7 GHz band: The TX RF module operates at one-half the carrier frequency (i.e. 850
MHz for 1.7 GHz carrier). Peak the internal pc board mounted filters FL-12 and FL-11 for
maximum IPA LVL meter reading. Peak the external filter FL2 (mounted in front of the
RFA and part of the doubler assembly) for maximum FWD PWR meter reading.
6.
Connect the transmitter dummy load output to the frequency counter. Allow 5 minutes for
the crystal oven to stabilize. Adjust 1st LO XTAL tuning capacitor C84 in the RF module
to set the new output carrier frequency.
Note: Long-term crystal aging will usually result in an overall shift in LO frequency.
Typically this shift will be less than 5 ppm (±5 kHz at 950 MHz) over the life of the radio
which is within acceptable performance and regulatory limits. On rare occasions this shift
PCL6000
602-13375-01
Moseley PCL6000
5-27
may be greater thereby exceeding allowable carrier frequency limits. It is therefore
suggested to check LO frequency after 2 years of operation to verify it satisfies FCC
guidelines.
7.
Put the cover back on the RF module (it is a tight fit by design) and reinstall the module in
the transmitter.
5.3.9.3 Receiver Procedure
Note: Check the schematics of the RF module pertaining to the frequency range of the
system being modified. If the frequency change falls outside of the original range listed,
the 1st LO crystal frequency must be changed. Consult the factory if this is the case.
(Multichannel Option: If this is a multichannel system, refer to Section 5.3.9.4)
1.
Attenuate the carrier to 1500 µV and feed to the receiver antenna input.
2.
Remove RF module from RX.
3.
Remove cover from component side of module.
4a.
Calculate the 2nd LO frequency as follows (check the system data sheet for the exact
frequency):
For a High-Side LO (LO > CARRIER):
2nd LO freq = [(LO freq.) - (CARRIER freq)] + 10.7 MHz
For a Low-Side LO (LO < CARRIER):
2nd LO frequency = [(CARRIER freq) - (LO freq.)] + 10.7
MHz
4b.
Program the synthesizer switches (S4-1, S1, S2, S3) in the RF module for the correct
frequency.
Please refer to the Synthesizer Frequency Calculation Example in Section 5.3.9.3.
5.
Put meter switch in AFC LVL position and adjust AFC for centerscale on front panel
meter. The test point/feedthrough marked “AFC LVL” on the RF Module should read +7
VDC.
6.
Reinstall RF Module.
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Alignment
AFC Adjustment
F1 AFC ADJ (C34) is enabled by switch S4-2. When enabled, LED indicator
CR6—visible through the side of the module—will illuminate.
F2 AFC ADJ (C30) is enabled by switch S4-3. When enabled, LED indicator
CR5—visible through the side of the module—will illuminate.
Both adjustments are typically enabled at the same time and both tune AFC.
C26 (fixed cap) is enabled by switch S4-4. Enable this switch when operating at
950 MHz or higher.
7a.
Preselector Filter (950 MHz, PCL6020/6030): Filters FL-12 and FL-11 (in the RF module)
are two- and three-pole helical filters with a passband of approximately 20 MHz. Under
normal circumstances, no alignment is required. To check alignment, a sweep oscillator,
whose frequency is centered in the middle of the RF band used, is injected into RF IN and
the signal is monitored at IF OUT. The five adjustments should be set for a flat passband
greater than 5 MHz wide.
7b.
Preselector Filter (950 MHz, PCL6060): The filter is located under the Audio/Power
Supply board of the receiver (see system assembly drawing). The filter has a passband of
approximately 20 MHz. Under normal circumstances, no alignment is required. To check
alignment, a sweep oscillator, whose frequency is centered in the middle of the RF band
used, is injected into RF IN and the signal is monitored at IF OUT. The five screw
adjustments should be set for a flat passband greater than 5 MHz wide.
7c.
Preselector Filter (220–450 MHz): The filter is located at the rear of the receiver (see
system assembly drawing) and has a passband of approximately 8 MHz. This can be
tuned by observing the RF LVL on the meter and peaking the three adjustment capacitors
of the filter. Take care not to adjust the LO filter which is located on the same bracket.
The preselector filter is the one that is connected directly to the ANTENNA port.
7d.
Preselector Filter (1.7 GHz): The filter is located at the rear of the receiver (see system
assembly drawing) and has a passband of approximately 20 MHz. Under normal
circumstances, no alignment is required. To check alignment, a sweep oscillator, whose
frequency is centered in the middle of the RF band used, is injected into RF IN and the
signal is monitored at IF OUT. The five screw adjustments should be set for a flat
passband greater than 5 MHz wide. Take care not to adjust the LO filter which is located
on the same bracket. The preselector filter is the one that is connected directly to the
ANTENNA port.
8.
Adjust 70 MHz bandpass filter capacitors C41, C44, and C47 (IF Demod module,
PCL6020) or C40, C43, C46, and C49 (Double Converter/LO3 module, PCL6030/6060)
for a peak reading on the RF LVL meter position. These adjustments are found through
access holes at the top of the module.
5.3.9.4 System Check
1.
Using MOD ADJ (R33) in the transmitter RF module, set deviation to ±50 kHz (±40 kHz
mono).
2.
Using a 15 kHz tone, verify distortion is within specification. (If adjustment is needed, use
10.7 MHz IF adjustments.)
PCL6000
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Moseley PCL6000
5-29
Synthesizer Frequency Calculation Example
Multichannel Option:
If this is a multichannel system, refer to Section 5.3.9.4.
Step 1.
If larger than 64 MHz, put S4-1 in “1” position and go to step 3.
Step 2.
Subtract 64 MHz from synthesizer frequency:
95.600 MHz (example frequency)= f
Step 3.
-95.600
-64.000
-31.600 MHz = result “A”
See Table 5-2 below, S1 column. Find largest entry which is less than or equal
to result “A”:
28.0 < 31.6, therefore S1 = 7
Step 4.
Subtract S1 frequency from result “A”:
-31.00 MHz
-28.00
-03.600 MHz = result “B”
Step 5.
See Table 5-2 below, S2 column. Find largest entry which is less than or equal
to result “B”:
3.50 < 3.60, therefore S2 = E
Step 6.
Subtract S2 frequency from result “B”:
-
3.600 MHz
-3.500
-3.100 MHz = result “C”
Step 7.
See Table 5-2 below, S3 column. Find largest entry which is less than or equal
to result “C”.
.100 < .100, therefore S3 = 4
Step 8.
Any remainder is obtained by offsetting the reference oscillator.
Figure 5-13
Synthesizer Frequency Calculation Example
5.3.9.5 Multichannel Option
The Multichannel System has been aligned to operate within the programmed channel frequency
bandwidth specified for your system. To operate at another non-programmed frequency, be sure
it is within the existing bandwidth of your system. The system data sheets supplied with your unit
PCL6000
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5-30
Alignment
contain valuable information for alignment and frequency changes in the field. Be sure to have
these at hand when contacting Moseley.
NOTE
Any user adjustments to the AFC level in the RF module and/or the IF filters in the IF strip will
change the factory presets for the existing programmed channels. Re-adjustment can be very
difficult to achieve. Consult the factory for best results.
Table 5-3
Synthesizer Frequency Selection Switch Settings
S1
MHz
S2
MHz
S3
MHz
0
0.0
0
0.0
0
0.0
1
4.0
1
0.25
1
0.025
2
8.0
2
0.50
2
0.050
3
12.0
3
0.75
3
0.075
4
16.0
4
1.00
4
0.100
5
20.0
5
1.25
5
0.125
6
24.0
6
1.50
6
0.150
7
28.0
7
1.75
7
0.175
8
32.0
8
2.00
8
0.200
9
36.0
9
2.25
9
0.225
A
40.0
A
2.50
A
0.250
B
44.0
B
2.75
B
0.275
C
48.0
C
3.00
C
0.300
D
52.0
D
3.25
D
0.325
E
56.0
E
3.50
E
0.350
F
60.0
F
3.75
F
0.375
PCL6000
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Moseley PCL6000
5-31
5.3.10 FMO Adjustment
Figure 5-14
Test Setup for FMO Adjustment
Procedure
1.
a.
Connect the equipment as shown in Figure 5-14.
b.
Using the counter, measure the output frequency of the FMO.
For a High-Side LO (LO > CARRIER):
FMO frequency = (LO freq) - (CARRIER freq)
For a Low-Side LO (LO < CARRIER):
FMO frequency = (CARRIER freq) - (LO freq)
Note : If the frequency is greater than 10 kHz away from the desired frequency, remove the top
cover and position frequency selector switches (S4-1, S1, S2, S3) for the desired frequency.
2.
Adjust the 1st LO XTAL tuning capacitor C84 so that the counter reads the desired
frequency.
Note : If the FMO LOSS OF LOCK is red, it will be necessary to first adjust the AFC level to
accomplish this step. See Step 4 below.
3.
Reconnect the FMO output to the RF input of the mixer.
4.
Adjust the controls on the RF signal generator for a frequency that is 70 MHz (PCL6020)
or 3 MHz (PCL6030/6060) above the FMO frequency and for an output of +10 dBm.
Using the RF spectrum analyzer, position the switches on the adjustable attenuator for an
output level of between -20 and -25 dBM at 70 MHz.
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5-32
Alignment
Reconnect the adjustable attenuator to the IF Demod.
5.
Adjust the oscillator output on the distortion measurement test set for a frequency of 1
kHz and a level of 1.25 VRMS (3.5 Vp-p).
6.
Distortion and AFC Level Alignment.
AFC Adjustment
F1 AFC ADJ (C34) is enabled by switch S4-2. When enabled, LED indicator
CR6—visible through the side of the module—will illuminate.
F2 AFC ADJ (C30) is enabled by switch S4-3. When enabled, LED indicator
CR5—visible through the side of the module—will illuminate.
Both adjustments are typically enabled at the same time and tune AFC.
C26 (fixed cap) is enabled by switch S4-4. Enable this switch when operating at
950 MHz or higher.
Using the multimeter, monitor FL1 (AFC Level) and adjust AFC so that the voltmeter
reads +7 VDC.
Using the distortion measurement test set, verify that the baseband output of the IF
Demod is between 1.0 and 1.5 VRMS.
Measure the distortion of the output of the IF Demod, and adjust the Varicap Bias
adjustment on the FMO (R37) for a minimum distortion reading.
Note : Normally there are two setting of the Varicap Bias adjustment that will obtain distortion
minima. Varicap bias should be adjusted to that setting which produces the lowest distortion.
Readjust the AFC so that the voltmeter reads 7 volts.
Repeat this procedure until the varicap bias is set for minimum distortion and the AFC
level adjustment is between 6.9 and 7.1 VDC.
Set the frequency on the distortion measurement test set for 15 kHz and verify that the
distortion meets specifications.
7.
Modulation Level.
The deviation select jumper E7 on the receiver Audio/Power Supply should be in the
wideband composite position.
Using the counter, set the output frequency of the distortion measurement test set
oscillator to 20.78 kHz (16.62 kHz mono). Verify that the oscillator output voltage is 1.25
VRMS (1.00 VRMS mono).
Adjust FMO deviation for ± 50 kHz (± 40 kHz mono) as follows, using the Bessel null
function waveforms in Figure 5-5:
a.
PCL6000
602-13375-01
Connect the output of the adjustable attenuator to the RF spectrum analyzer and
disconnect the audio input from the FMO. Establish the reference level shown in
Figure 5-5 on the RF spectrum analyzer.
Moseley PCL6000
b.
8.
5-33
Reconnect the audio from the distortion measurement test set to the FMO and
adjust the MODULATION ADJ (R33) on the FMO from minimum to the first
Bessel null function (Figure 5-5b).
Reconnect the adjustable attenuator to the IF Demod.
Verify the AFC level at FL1 is between 6.9 and 7.1 VDC.
Verify the distortion at 15 kHz meets specifications.
Repeat Steps 6 through 8 of this procedure as required to achieve the above results.
9.
Using the Power Meter, verify that the output of the FMO is -2 ± 2 dBm.
5.3.11 Transmitter Troubleshooting Procedure
Procedure:
1.
Connect the equipment as shown in Figure 5-1 and position the OPERATE/STANDBY
switch in the OPERATE position.
2.
Check the +5 VDC, +15 VDC, -15 VDC, -12 VDC, and +12.5 VDC test points on the
Audio/Power Supply board.
3.
Verify that the RADIATE and AFC LOCK status indicators are green. The AFC LOCK
indicator is controlled by the FMO. The RADIATE status indicator is determined by the
Radiate Control circuitry.
4.
The following test points on the Audio/Power Supply board should be checked:
a.
AFC LVL: The AFC Level should be between 6.9 VDC and 7.1 VDC. If not, the
FMO AFC Level should be aligned before proceeding (see Section 5.3.10).
b.
IPA: The IPA Level should be greater than 1 VDC. If not, the following steps
should be taken:
Verify that the +12 VDC is between +12.25 and +12.75 VDC.
Using the power meter, verify that the input to the IPA amplifier is at least -10 dBm. If it is,
the problem is located in the IPA amplifier.
Measure the output of the 1st LO and module for a value of between +5 and +10 dBm.
Using the power meter, measure the output of the FMO for a value of -2 ±2 dBm.
PCL6000
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5-34
Alignment
5.4 Module Adjustments Information
This section provides additional technical information to assist during alignment troubleshooting
and module replacement.
Included are adjustment instructions to be used during troubleshooting, module repair, or module
replacement for the following modules:
5.4.1
Transmitter Audio/power Supply
5.4.2
Transmitter RF Module
5.4.3
Doubler assembly (1.7GHz)
5.4.4
RF Amplifier
5.4.5
Receiver Audio/Power supply
5.4.6
Receiver RF Module
5.4.7
IF Demod (PCL6020)
5.4.8
Double Converter/LO3 (PCL6030/6060)
5.4.9
Preamp/1st Mixer (950 MGz, PCL6060)
5.4.10 FM Demod (PCL6030/6060)
5.4.11 Adjacent Channel Filter (PCL6060)
5.4.12 Channel Control Board (Multichannel Option)
5.4.1 Transmitter Audio/Power Supply
AUDIO PROCESSOR
COMP PGM LVL (R28)
Composite program level adjustment. Sets the transmitter deviation of
the composite signal. Normal input is 3.5 Vp-p. The normal deviation of
the transmitter is ±50 kHz.
MONO PGM LVL (R199)
Monaural program level adjustment. Sets the transmitter deviation of
the mono signal. Normal input is +10 dBm. The normal deviation of
the transmitter is ±40 kHz.
DIG PGM LVL (R200)
Digital modulation program level adjustment. Sets the transmitter
deviation of the digital signal in DSP6000 applications. Consult the
DSP6000 manual for further information.
MUX1 LVL (R29)
MUX (ch. 1) level adjustment. Sets the transmitter deviation for the
MUX (ch. 1) deviation. The normal input is 1.5 Vp-p at 110 kHz. Main
carrier deviation normally is ±5 kHz.
MUX2 LVL (R40)
MUX (ch. 2) level adjustment. Sets the transmitter deviation for the
MUX (ch. 2) input. The normal input is 1.5 Vp-p at 185kHz. Main
carrier deviation normally is ±7.5 kHz.
PHASE SELECT (E2)
Jumper used to select the phase of the modulation. Position A is inphase and position B is 180 degrees out -of-phase.
MONO LVL SELECT(E6)
Hard-wire jumper used to select various input levels and impedances.
See the table referenced in the schematic.
PCL6000
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Moseley PCL6000
5-35
75 µs PRE-EMPHASIS (E5)
Jumper to enable (IN) or disable (OUT) the pre-emphasis network
(E5) (mono only).
F1 (R77)
Adjustment for lower break frequency of pre-emphasis (factory set).
F2 (R78)
Adjustment for upper break frequency of pre-emphasis (factory set).
15 kHz LPF (E4)
Jumper select for monaural low-pass filter (IN/OUT).
FA (R76)
Monaural 15 kHz low-pass filter adjustments (factory set).
FB (R75)
Monaural 15 kHz low-pass filter adjustments (factory set).
FC (R49)
Monaural 15 kHz low-pass filter adjustments (factory set).
LF TILT (R47)
Compensates for low frequency roll-off of mono filter (factory set).
LPF GAIN (R45)
Sets unity gain of mono filter.
MONO/COMP SELECT (E3)
Selects the input program signal to be processed.
METERING
COMP PGM MTRG(R201)
Composite PGM LVL meter function. 0 dB = 50 kHz deviation.
MONO PGM MTRG(R202)
Monaural PGM LVL meter function. 0 dB = 40 kHz deviation.
DIG PGM MTRG (R203)
Digtial modulation PGM LVL meter function.
REFL-PWR (R161)
REFL PWR meter function. 0 dB = 100% reflected power.
FWD-PWR (R162)
FWD PWR meter function. 0 dB = 100% output power
(5 to 7 watts).
PA-CURR (R163)
RF Power Amp current meter function. Scale is AMPS X 10.
IPA-LVL (R164)
Intermediate power amplifier relative output level meter function.
AFC-LVL (R165)
Relative AFC level from FMO/synthesizer meter function.
LO1 (R166)
Relative output level of 1st LO meter function.
MUX (R159)
MUX LVL meter function. 5 on the lower scale equals 5 kHz deviation
of the main carrier by the subcarrier.
+5V (R157)
+12V (R155)
+15V (R151)
-15V (R153)
Power supply metering adjustments.
METER BALLISTICS (R286)
Adjust the meter ballistics. The meter is normally adjusted for a 0.25
dB overshoot by switching between the REFL POWER meter function
and the PGM LEVEL meter function with a 0 dB input (program input
= 3.5 Vp-p or 1.25 VRMS).
METER ZERO (R131)
Used to electrically zero the meter.
POWER SUPPLY
+12 V ADJ (R6)
Used to adjust the +12.5 VDC (+22 VDC for 1.7 GHz) power supply
output voltage when the transmitter is in the OPERATE position.
CONTROL
TPT THRESHOLD (R138)
Sets the point at which the standby transmitter will switch in
conjunction with the Moseley TPT-2 transfer panel.
PCL6000
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5-36
Alignment
5.4.2 Transmitter RF Module
FMO SYNTHESIZER
REF FREQ ADJ (OSC1)
Frequency Trim Adjustment. Used to tune the reference oscillator.
LOSS OF LOCK (CR1)
This LED gives a red indication when the AFC loses lock.
AFC LVL (FL1)
AFC level test point. Monitors the DC level of the AFC loop. It is
normally set to +7 VDC.
VARICAP BIAS (R37)
Varicap bias adjustment. Used to adjust the FMO for minimum
distortion.
VARICAP BIAS (TP4)
Varicap bias level test point. A DC level (-5.5 VDC) to set a nominal
minimum distortion point.
MOD ADJ (R33)
Modulation adjustment. Used to set the FMO deviation. It is normally
set to ± 40 kHz with 2.8 Vp-p input.
F1 AFC ADJ (C34)
F1 AFC Level Adjustment. Adjusted for a nominal 5–9 VDC
depending on the channel assignment. Check the test data sheet.
F1 “ON” (S4-2)
Switches on the F1 AFC adjustment capacitor (active).
F1 LED (CR6)
Indicates the F1 AFC adjustment capacitor is active.
F2 AFC ADJ (C30)
F2 AFC Level Adjustment. Adjusted for a nominal 5–9 VDC
depending on the channel assignment. Check the test data sheet.
F2 “ON” (S4-3)
Switches on the F2 AFC adjustment capacitor (active).
F2 LED (CR5)
Indicates the F2 AFC adjustment capacitor is active.
FIX “ON” (S4-4)
Switches on the FIX AFC adjustment capacitor (active).
FMO LVL (TP2)
FMO level test point. A DC level (+0.9 VDC) that represents the
detected relative output of the FMO oscillator.
FREQUENCY SELECTOR SWITCHES
S4-1
Programs the 64 MHz step size of the synthesizer.
S1
Programs the 4 MHz step size of the synthesizer.
S2
Programs the 250 kHz step size of the synthesizer.
S3
Programs the 25 kHz step size of the synthesizer.
INTERMEDIATE POWER AMPLIFIER (950 MHZ)
The only adjustments to the IPA are the filters (FL11, FL12). These can be adjusted by injecting a
sweep signal at J3 with P2 in the “test-out” position. The filter response may be tuned by
observing the output on a spectrum analyzer. If a quick alignment is needed, put the meter switch
in IPA position and peak the reading by adjusting the filter screws. P2 should be in the operate
position for this.
INTERMEDIATE POWER AMPLIFIER (220–450 MHZ)
The only adjustments to the IPA are the external filters (FL4, FL2). These can be adjusted by
tuning the filter screws for a peak reading of the FWD PWR meter while in the OPERATE mode.
1ST LOCAL OSCILLATOR (950 MHZ)
XTAL OSC TUNE (C84)
PCL6000
602-13375-01
Crystal oscillator tune. Sets peak oscillator output and operating
point.
Moseley PCL6000
5-37
DRIVER TUNE (C88)
Sets input level to the doubler for maximum odd harmonic rejection.
SRD INPUT MATCH1 (C95)
Diode drive adjustment. Used to tune for maximum power output.
SRD INPUT MATCH2 (C98)
Diode drive adjustment. Used to tune for maximum power output.
SRD OUTPUT MATCH1(C65)
Diode match adjustment. Used to tune for maximum power output.
SRD OUTPUT MATCH2(C101) Diode match adjustment. Used to tune for maximum power output.
LO FILTER (FL10)
Factory set for 20 MHz bandwidth. DO NOT ADJUST.
LO LVL (FL3)
Detected DC level (+1.5 VDC) representing power output of LO.
Note : When installed in the PCL6010 transmitter, set for the 950 MHz band, the frequency
output of this module should be 1020 MHz with a power output between +5 and +9 dBm. This
measurement should be made on a low-power wattmeter.
1ST LOCAL OSCILLATOR (330/450 MHZ)
XTAL OSC TUNE (C84)
Crystal oscillator tune. Sets peak oscillator output and operating
point.
DRIVER TUNE (C88)
Sets input level to the doubler for maximum odd harmonic rejection.
SRD INPUT MATCH1 (C95)
Diode drive adjustment. Used to tune for maximum power output.
SRD INPUT MATCH2 (C98)
Diode drive adjustment. Used to tune for maximum power output.
SRD OUTPUT MATCH (C101) Diode match adjustment. Used to tune for maximum power output.
LO FILTER (EXT)
External LO filter. Tune for maximum power output.
LO LVL (FL3)
Detected DC level (+1.5 VDC) representing power output of LO.
5.4.3 Doubler Assembly (1.7 GHz)
The only adjustments to the Doubler Assembly are in the filter (FL2). The filter can be adjusted by
injecting a sweep signal into FL2. The filter response may be tuned by observing the output on a
spectrum analyzer. If a quick alignment is needed, put the meter switch in the FWD PWR position
and peak the reading by adjusting the filter screws.
5.4.4 RF Amplifier
5.4.4.1 Alignment Procedure (950 MHz)
1.
Measure input level at the RFA. It should be greater than +13 dBm and less than +19
dBm (damage level). If power level is low, peak the external RFA filter.
2.
Connect RFA output to power meter and spectrum analyzer using an appropriate high
power attenuator/dummy load.
3.
Connect input and adjust R1 (1st stage bias) through access hole in RFA for 6 watts (+38
dBm).
4.
Monitor PA final current sample voltage across C701 and C702. Calculate (final current =
Vsample divided by 0.16). Current should be < 1.7 amp.
5.
Check harmonic and spurious signal content for level ≤ -65 dBc.
PCL6000
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5-38
Alignment
5.4.4.2 Alignment Procedure (450 MHz)
1.
Measure input level at the RFA. It should be greater than +18 dBm and less than +23
dBm (damage level). If power level is low, peak the external RFA filter.
2.
Connect RFA output to power meter and spectrum analyzer. Using appropriate high
power attenuator/dummy load.
3.
Connect input and adjust RFA power supply +12.5 ADJ for 10 watts (+40 dBm).
4.
Monitor final current for reading < 2.0 amp.
5.
Check harmonic and spurious signal content for level ≥ 65 dBc.
5.4.4.3 Alignment Procedure (330 MHz)
1.
Measure input level at the RFA. It should be 20 dBm (100 mW nominal). If power level is
low, peak the external RFA filter.
2.
Connect RFA output to power meter and spectrum analyzer using appropriate high power
attenuator/dummy load.
3.
Connect input and adjust C701, C703 and C707 for max output power.
4.
Adjust C712 and C713 for maximum output power, minimum final stage current and
harmonic/spurious content ≥ 65 dBc.
5.
Maximum final current must be < 1.7 amp.
5.4.4.4 Alignment Procedure (220 MHz)
1.
Measure input level at the RFA. It should be 20 dBm (100 mW nominal). If power level is
low, peak the external RFA filter.
2.
Connect RFA output to power meter and spectrum analyzer using appropriate high power
attenuator/dummy load.
3.
Connect input and adjust C701, C703, and C707 for max output power.
4.
Adjust C712 and C713 for maximum output power, minimum final stage current and
harmonic/spurious content ≥ 65 dBc.
5.
Maximum final current must be < 1.7 amp.
5.4.4.5 Alignment Procedure (1.7 GHz)
CAUTION
Do not attempt to adjust this RFA. Call the factory for any technical problems encountered with
this module.
5.4.5 Receiver Audio/Power Supply
AUDIO PROCESSOR
COMP/MONO SELECT
PCL6000
602-13375-01
Jumpers (E1, E4, E5, E6, E7, E8, E10) select proper audio
processing and MUX filter bands for either composite or monaural
operation.
Moseley PCL6000
5-39
COMP FILTER (E9)
Jumper E9 bypasses the composite low pass filter and delay
equalizer (OUT position) for digital STL applications (see DSP6000
manual for further details.
COMP HF TILT (R7)
High frequency tilt adjustment (composite). Compensates for the high
frequency roll-off caused by the IF filtering.
MONO HF TILT (R208)
High frequency tilt adjustment (monaural). Compensates for the high
frequency roll-off caused by the IF filtering.
COMP LF TILT (R61)
Composite low frequency tilt adjustment. Adjusts the stereo
separation between 30 and 100 Hz.
DELAY EQ (R111)
Delay Equalizer Adjustment. Adjusts the stereo separation between
10 and 15 kHz.
Note : The COMP HF TILT, COMP LF TILT, and DELAY EQ adjustments are used primarily to
optimize stereo separation performance. In other applications, such as communications, HF TILT
and LF TILT would be used to adjust the audio frequency response within ± 1 dB from 30 Hz to
53 kHz. The DELAY EQ adjustment would have no effect on the frequency response
performance.
75 µs DE -EMPHASIS
Jumper selects the de-emphasis network to be enabled
SELECT (E2) (IN) or disabled (OUT).
F1 (R23)
Adjustment for lower break frequency of de-emphasis (factory set).
F2 (R22)
Adjustment for upper break frequency of de-emphasis (factory set).
15 kHz LPF (E3)
Jumper select for monaural low-pass filter.
FA (R30)
Monaural 15 kHz low-pass filter adjustments (factory set).
FB (R78)
Monaural 15 kHz low-pass filter adjustments (factory set).
FC (R82)
Monaural 15 kHz low-pass filter adjustments (factory set).
MONO LF TILT (R88)
Compensates for low frequency roll-off of mono filter (factory set).
FILTER GAIN (R89)
Sets unity gain of mono filter.
MONO PGM LVL (R98)
Sets output program level of the receiver.
MONO PGM MTRG (R90)
Sets the meter program level for mono operation.
MUX LVL (R12)
MUX level adjustment. Adjusts the MUX level output of the audio
processor. Normally adjusted so that ± 5 kHz (± 4 kHz mono)
deviation equals 1.5 Vp-p at 110 kHz.
METERING AND STATUS
PGM LVL (R171)
Adjusts the PGM LEVEL meter function. 100% = 0 dB.
AFC LVL (R166)
AFC level metering adjust. Center arc.
LO1 (R169)
1st LO relative level. Center arc.
LO2 (R168)
2nd LO/synthesizer relative level. Center arc.
LO3 (R167)
3rd LO relative level (PCL6030). Center arc.
MUX LVL (R170)
Adjusts the MUX LVL function of the meter. A reading of 5 on the
lower scale equals 5 kHz of the main carrier by the subcarrier.
PCL6000
602-13375-01
5-40
Alignment
SIG LVL (R172)
Used to adjust the RF LEVEL function. A reading of 3 K on the center
scale of the meter equals 3000 µV of input signal.
+5V (R213)
+15V (R210)
-15V (R212)
Power supply metering adjustments.
METER BALLISTICS (R196)
Adjusts the meter ballistics.
METER ZERO (R186)
Adjusts meter zero.
MUTE AND TRANSFER
The Mute and Transfer section requires no adjustment. If a failure is suspected in the Mute and
Transfer circuitry, the following information may be useful in isolating the problem:
1.
A mute signal from the IF Demod (Mute Threshold Adjust LED red) will de-energize the
mute relay and disconnect the composite and MUX audio outputs.
2.
This module may be externally muted, either by a remote mute input or a transfer input
from a receiver transfer panel (TPR).
5.4.6 Receiver RF Module
PRESELECTOR FILTER (950 MHZ, PCL6020/6030)
Filters FL-12 and FL-11 (in the RF module) are two- and three-pole helical filters with a passband
of approximately 20 MHz. Under normal circumstances, no alignment is required. To check
alignment, a sweep oscillator, whose frequency is centered in the middle of the RF band used, is
injected into RF IN and the signal is monitored at IF OUT. The five adjustments should be set for
a flat passband greater than 5 MHz wide.
PRESELECTOR FILTER (950 MHZ, PCL6060)
The filter is located under the Audio/Power Supply board of the receiver (see system assembly
drawing). The filter has a passband of approximately 20 MHz. Under normal circumstances, no
alignment is required. To check alignment, a sweep oscillator, whose frequency is centered in the
middle of the RF band used, is injected into RF IN and the signal is monitored at IF OUT. The five
screw adjustments should be set for a flat passband greater than 5 MHz wide.
PRESELECTOR FILTER (220–450 MHZ)
The filter is located at the rear of the receiver (see system assembly drawing) and has a
passband of approximately 8 MHz. This can be tuned by observing the RF LVL on the meter and
peaking the three adjustment capacitors of the filter. Take care not to adjust the LO filter which is
located on the same bracket. The preselector filter is the one that is connected directly to the
ANTENNA port.
PRESELECTOR FILTER (1.7 GHZ)
The filter is located at the rear of the receiver (see system assembly drawing) and has a
passband of approximately 20 MHz. Under normal circumstances, no alignment is required. To
check alignment, a sweep oscillator, whose frequency is centered in the middle of the RF band
used, is injected into RF IN and the signal is monitored at IF OUT. The five screw adjustments
should be set for a flat passband greater than 5 MHz wide. Take care not to adjust the LO filter
which is located on the same bracket. The preselector filter is the one that is connected directly to
the ANTENNA port.
PCL6000
602-13375-01
Moseley PCL6000
5-41
1ST LOCAL OSCILLATOR (950 MHZ)
The adjustments for the receiver 1st LO are identical to those specified for the transmitter 1st LO
(see Section 5.4.2).
1ST LOCAL OSCILLATOR (330/450 MHZ)
The adjustments for the receiver 1st LO are identical to those specified for the transmitter 1st LO
(see Section 5.4.2).
LO2 SYNTHESIZER
REF FREQ ADJ (OSC1)
Frequency Trim Adjustment. Used to tune the reference oscillator.
LOSS OF LOCK (CR1)
This LED gives a red indication when the AFC loses lock.
AFC LVL (FL1)
AFC level test point. Monitors the DC level of the AFC loop. It is
normally set to +7 VDC.
F1 AFC ADJ (C34)
F1 AFC Level Adjustment. Adjusted for a nominal 5–9 VDC
depending on the channel assignment. Check the test data sheet.
F1 “ON” (S4-2)
Switches on the F1 AFC adjustment capacitor (active).
F1 LED (CR6)
Indicates the F1 AFC adjustment capacitor is active.
F2 AFC ADJ (C30)
F2 AFC Level Adjustment. Adjusted for a nominal 5–9 VDC
depending on the channel assignment. Check the test data sheet.
F2 “ON” (S4-3)
Switches on the F2 AFC adjustment capacitor (active).
F2 LED (CR5)
Indicates the F2 AFC adjustment capacitor is active.
FIX “ON” (S4-4)
Switches on the FIX AFC adjustment capacitor (active).
LO2 LVL (TP2)
LO2 level test point. A DC level (+0.9 VDC) that represents the
detected relative output of the FMO oscillator.
FREQUENCY SELECTOR SWITCHES
S4-1
Programs the 64 MHz step size of the synthesizer.
S1
Programs the 4 MHz step size of the synthesizer.
S2
Programs the 250 kHz step size of the synthesizer.
S3
Programs the 25 kHz step size of the synthesizer.
5.4.7 IF Demod (PCL6020)
1ST 10.7 MHz IF ADJ (C13)
IF Adjustment. Adjust for minimum distortion.
2ND 10.7 MHz IF ADJ (C18)
IF Adjustment. Adjust for minimum distortion.
Note: The L02 FREQ ADJ and the 1st 10.7 MHZ IF ADJ and 2nd 10.7 MHz IF ADJ interact. See
paragraph 5.3.6, Distortion Alignment, for additional information.
70 MHz BPF ADJ
(C41,C44,C47)
Bandpass Filter Adjustments. The alignment of the 70 MHz
bandpass filter can be checked indirectly by verifying the
receiver noise performance to within 20 µV of the value specified on
the final test data sheet included in this manual. (See paragraph
5.3.2, Receiver Sensitivity).
PCL6000
602-13375-01
5-42
Alignment
MUTE THRESHOLD (R18)
Mute Threshold Adjust. Adjusts the mute logic threshold; threshold =
20 µV input signal.
BB LVL ADJ (R19)
Baseband Level Adjust. Adjust the output of the baseband including
the composite and MUX levels.
±50 kHz deviation = 3.5 Vp-p.
BB LVL (TP2)
Baseband Level Test Point. An AC test point used to monitor the
output level of the baseband processor.
±50 kHz deviation = 3.5 Vp-p.
DEMOD BALANCE (TP1)
Demod Balance Level. Is an indication of quadrature coil balance
(minimum distortion) and/or demodulator free drift
(0 ± 1 VDC).
5.4.8 Double Converter/LO3 (PCL6030/6060)
70 MHz BPF ADJ
(C40,C43,C46,C49)
Bandpass Filter Adjustments. The alignment of the 70 MHz
bandpass filter can be checked indirectly by verifying the
receiver noise performance to within 20 µV of the value specified on
the final test data sheet included in this manual. (See paragraph
5.3.2, STL Receiver Sensitivity.
1ST IF FLTR SELECT (E2,E3) Selects proper filter for intended system application.
1ST 10.7 MHz IF ADJ WB (C14)Wideband IF Filter Adjust. Determines selectivity and distortion
specifications.
1ST 10.7 MHz IF ADJ NB (C15) Narrowband IF Filter Adjust. Determines selectivity and distortion
specifications.
1ST 10.7 MHz IF ADJ MONO
(C13)
Mono IF Filter Adjust Determines selectivity and distortion
specifications.
2ND IF FLTR SELECT (E4,E5) Selects proper filter for intended system application.
2ND 10.7 MHz IF ADJ COMP
Composite IF Filter Adjust. Determines selectivity and distortion (C21)
specifications.
2ND 10.7 MHz IF ADJ MONO
Mono IF Filter Adjust. Determines selectivity and distortion (C22)
specifications.
LO3 OUT LVL (FL6)
LO3 Output Level. DC voltage sample of 3rd LO at 13.7 MHz (0.3–1.2
VDC).
5.4.9 Preamp/1st Mixer (950 MHz, PCL6060)
RF ATTEN ADJ (R13)
Sets the value of front end attenuation (up to 15 dB).
RF ATTEN LVL (TP1)
Indication of relative attenuation (0 VDC = max atten.).
70 MHZ OUTPUT ADJ (L3)
Set for peak level of 1st IF output in this module.
5.4.10 FM Demod (PCL6030/6060)
LOG GAIN ADJ (R67)
PCL6000
602-13375-01
Log Gain Adjustment. Calibrates the RF LVL meter function. With 10
mV of signal applied to the RF input, SIG LVL on the Audio/Power
Supply board should be adjusted for a reading of 3K on the middle
scale. The input should then be reduced to 100 mV, and the LOG
Moseley PCL6000
5-43
GAIN ADJ on the FM Demod should be adjusted for 100 on the
middle scale. The 3, 10, 30, 100, 300, 1 K, and 3 K levels should be
checked to ensure that the meter reads between the upper and lower
line on the meter for each range. As a general rule, SIG LVL is used
to adjust the full scale or 3 K reading, and the LOG GAIN ADJ on the
FM Demod module is used to adjust the linearity in the 100 to 300 mV
range.
LOG LVL (TP3)
Log Level Test Point. A DC test point used to monitor the first stage
of the meter log amplifier.
DEMOD LVL (TP2)
Demod Level Test Point. A DC test point with a voltage proportional
to the frequency of the 3 MHz IF. Normally, this voltage is between +4
and +6 VDC.
MUTE INDICATOR (CR6)
Mute Threshold Indicator (LED). Indicates status of mute logic (red =
mute).
MUTE THRESHOLD ADJ
(R22)
Mute Threshold Adjust. Adjusts the mute logic threshold;
threshold = 20 mV input signal with RF gain at 15 on receiver
meter.
BB LVL ADJ (R10)
Baseband Level Adjust. Adjust the output of the baseband including
the composite and MUX levels. ±50 kHz deviation wideband or ±35
kHz deviation narrowband = 3.5 Vp-p.
BB LVL (TP1)
Baseband Level Test Point. An ac test point used to monitor the
output level of the baseband processor. ±50 kHz deviation wideband
or ±35 kHz deviation narrowband = 3.5 Vp-p.
5.4.11 Adjacent Channel Filter (PCL6060)
COMP/MONO SELECT
(E1,E2)
Selects proper filter for intended system application (Composite
or Mono).
5.4.12 Channel Control Board (Multichannel Option)
CHNL SELECT (S1)
Front panel select control. Selects channels 0–15.
FIX LED (CR1)
LED indicates EPROM output bit C5 (FIX capacitor in RF Module) is
active.
F2 LED (CR2)
LED indicates EPROM output bit C4 (F2 capacitor in RF Module) is
active.
F1 LED (CR3)
LED indicates EPROM output bit C3 (F1 capacitor in RF Module) is
active.
MOD1 LED (CR4)
LED indicates EPROM output bit C2 (MOD1 adjustment) is active.
MOD2 LED (CR5)
LED indicates EPROM output bit C1 (MOD2 adjustment) is active.
MOD3 LED (CR6)
LED indicates EPROM output bit C0 (MOD3 adjustment) is active.
DGT1 TEST (E1)
Short circuit this test point to turn on all segments (display “8”) of
DGT1.
MOD IN (TP1)
Modulation input to control board (3.5 Vp-p nominal).
MOD1 LVL ADJ (R12)
Modulation adjustment (1) set active by EPROM or CHNL ZERO
programming.
PCL6000
602-13375-01
5-44
Alignment
MOD2 LVL ADJ (R13)
Modulation adjustment (2) set active by EPROM or CHNL ZERO
programming.
MOD3 LVL ADJ (R14)
Modulation adjustment (3) set active by EPROM or CHNL ZERO
programming.
MOD OUTPUT (TP2)
Modulation output to transmitter RF Module (3.5 Vp-p nominal).
INTERNAL REMOTE
ENABLE
(S6-1)
When set to ON, provides internal front panel lockout of the channel
select function.
CHNL SELECT (S6-2)
BCD 8's bit to set channel number when INT RMT ENABLE is ON.
1=8
(S6-3)
BCD 4's bit to set channel number when INT RMT ENABLE is ON.
1=4
(S6-4)
BCD 2's bit to set channel number when INT RMT ENABLE is ON.
1=2
(S6-5)
BCD 1's bit to set channel number when INT RMT ENABLE is ON.
1=1
CHANNEL ZERO PROGRAMMING
FIX
(S2-1)
Sets FIX capacitor in RF Module active. 1=ON
F2
(S2-2)
Sets F2 capacitor in RF Module active. 1=ON
F1
(S2-3)
Sets F1capacitor in RF Module active. 1=ON
MOD1
(S2-4)
Sets modulation adjust (MOD1) active. 1=ON
MOD2
(S2-5)
Sets modulation adjust (MOD2) active. 1=ON
MOD3
(S2-6)
Sets modulation adjust (MOD3) active. 1=ON
N/A
(S2-7)
not used
64 MHz
(S2-8)
Sets 64 MHz bit on for frequency selection. 1=ON
4 MHz
(S3)
Sets 4 MHz step. HEX switch functions as follows:
0=0 MHz, 1=4MHz, 2=8 MHZ, …, E=56 MHz, F=60 MHz
250 kHz
(S4)
Sets 250 kHz step. HEX switch functions as follows:
0=0 kHz, 1=250 kHz, 2=500 kHZ, …, E=3.5 MHz, F=3.75 MHz
25 kHz
(S5)
Sets 25 kHz step. HEX switch functions as follows:
0=0 kHz, 1=25 kHz, 2=50 kHZ, …, E=350 kHz, F=375 kHz
PCL6000
602-13375-01
Moseley PCL6000
5-45
5.5 Test Fixture Diagrams
The test fixtures shown in Figures 5-15 and 5-16 have been designed to interface with the
equipment specified in Table 5-1.
.296uF
IN
10K
OUT
Figure 5-15
50 Hz High-Pass Filter
.47uF
IN
12K
12K
.0068uF
OUT
(MD1045)
Figure 5-16
75 µ s De-Emphasis with 30 Hz High-Pass Filter
PCL6000
602-13375-01
5-46
Alignment
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PCL6000
602-13375-01
Moseley PCL6000
6-1
6 Customer Service
6.1 Introduction
Moseley Associates will assist its product users with difficulties. Most problems can be resolved
through telephone consultation with our technical service department. When necessary, factory
service may be provided. If you are not certain whether factory service of your equipment is
covered, please check your product Warranty/Service Agreement.
Do not return any equipment to Moseley without prior consultation.
The solutions to many technical problems can be found in our product manuals; please read them
and become familiar with your equipment.
We invite you to visit our Internet web site at http://www.moseleysb.com/ .
6.2 Technical Consultation
Please have the following information available prior to calling the factory:
•
Model number and serial number of unit;
•
Shipment date or date of purchase of an Extended Service Agreement;
•
Any markings on suspected subassemblies (such as revision level); and
•
Factory test data, if applicable.
Efficient resolution of your problem will be facilitated by an accurate description of the problem
and its precise symptoms. For example, is the problem intermittent or constant? What are the
front panel indications? If applicable, what is your operating frequency?
Technical consultation is available at (805) 968-9621 from 8:00 a.m. to 5:00 p.m., Pacific time,
Monday through Friday. During these hours a technical service representative who knows your
product should be available. If the representative for your product is busy, your call will be
returned as soon as possible. Leave your name, station call letters if applicable, type of
equipment, and telephone number(s) where you can be reached in the next few hours.
Please understand that, in trying to keep our service lines open, we may be unable to provide
“walk-through” consultation. Instead, our representative will usually suggest the steps to resolve
your problem; try these steps and, if your problem remains, do not hesitate to call back.
After-Hours Emergencies
Emergency consultation is available through the same telephone number from 5:00 p.m. to 10:00
p.m. Pacific time, Monday to Friday, and from 8:00 a.m. to 10:00 p.m. Pacific time on weekends
and holidays. Please do not call during these hours unless you have an emergency with installed
equipment. Our representative will not be able to take orders for parts, provide order status
information, or assist with installation problems.
PCL6000
602-13375-01
6-2
Customer Service
6.3 Factory Service
Arrangements for factory service should be made only with a Moseley technical service
representative. You will be given a Return Authorization (RA) number. This number will
expedite the routing of your equipment directly to the service department. Do not send any
equipment to Moseley Associates without an RA number.
When returning equipment for troubleshooting and repair, include a detailed description of the
symptoms experienced in the field, as well as any other information that well help us fix the
problem and get the equipment back to you as fast as possible. Include your RA number inside
the carton.
If you are shipping a complete chassis, all modules should be tied down or secured as they were
originally received. On some Moseley Associates equipment, printing on the underside or topside
of the chassis will indicate where shipping screws should be installed and secured.
Ship equipment in its original packing, if possible. If you are shipping a subassembly, please pack
it generously to survive shipping. Make sure the carton is packed fully and evenly without voids,
to prevent shifting. Seal it with appropriate shipping tape or nylon-reinforced tape. Mark the
outside of the carton “Electronic Equipment - Fragile” in large red letters. Note the RA number
clearly on the carton or on the shipping label, and make sure the name of your company is listed
on the shipping label. Insure your shipment appropriately. All equipment must be shipped
prepaid.
The survival of your equipment depends on the care you take in shipping it.
Address shipments to:
MOSELEY ASSOCIATES, INC.
Attn: Technical Services Department
111 Castilian Drive
Santa Barbara, CA 93117
Moseley Associates, Inc. will return the equipment prepaid under Warranty and Service
Agreement conditions, and either freight collect or billed for equipment not covered by Warranty
or a Service Agreement.
6.4 Field Repair
Some Moseley Associates equipment will have stickers covering certain potentiometers,
varicaps, screws, and so forth. Please contact Moseley Associates technical service department
before breaking these stickers. Breaking a tamperproof sticker may void your warranty.
When working with Moseley’s electronic circuits, work on a grounded antistatic surface, wear a
ground strap, and use industry-standard ESD control.
Try to isolate a problem to a module or to a specific section of a module. Then compare actual
wave shapes and voltage levels in your circuit with any shown on the block and level diagrams or
schematics. These will sometimes allow the problem to be traced to a component.
PCL6000
602-13375-01
Moseley PCL6000
6-3
Spare Parts Kits
Spare parts kits are available for all Moseley Associates products. We encourage the purchase of
the appropriate kits to allow self-sufficiency with regard to parts. Information about spares kits for
your product may be obtained from our sales department or technical service department.
Module Exchange
When it is impossible or impractical to trace a problem to the component level, replacing an entire
module or subassembly may be a more expedient way to correct the problem. Replacement
modules are normally available at Moseley Associates for immediate shipment. Arrange delivery
of a module with our technical services representative. If the shipment is to be held at your local
airport with a telephone number to call, please provide an alternate number as well. This can
prevent unnecessary delays.
Field Repair Techniques
If an integrated circuit is suspect, carefully remove the original and install the new one, observing
polarity. Installing an IC backward may damage not only the component itself, but the surrounding
circuitry as well. IC’s occasionally exhibit temperature-sensitive characteristics. If a device
operates intermittently, or appears to drift, rapidly cooling the component with a cryogenic spray
may aid in identifying the problem.
If a soldered component must be replaced, do the following:
•
Use a 40W maximum soldering iron with an 1/8-inch maximum tip. Do not use a
soldering gun. Excessive heat can damage components and the printed circuit.
Surface mount devices are especially heat sensitive, and require a lower power
soldering iron. If you are not experienced with surface mount components, we
suggest that you do not learn on critical equipment.
•
Remove the solder from the component leads and the printed circuit pads. Solder
wicking braid or a vacuum de-solderer are useful for this. Gently loosen the
component leads and extract the component from the board.
•
Form the leads of the replacement component to fit easily into the circuit board
pattern.
•
Solder each lead of the component to the bottom side of the board, using a good
brand of rosin-core solder. We recommend not using water soluble flux, particularly
in RF portions of the circuit. The solder should flow through the hole and form a fillet
on both sides. Fillets should be smooth and shiny, but do not overheat the
component trying to obtain this result.
•
Trim the leads of the replacement component close to the solder on the pad side of
the printed circuit board with a pair of diagonal cutters.
•
Completely remove all residual flux with a cotton swab moistened with flux cleaner.
•
For long term quality, inspect each solder joint—top-side and bottom—under a
magnifier and rework solder joints to meet industry standards. Inspect the nearby
components soldered by the Moseley Associates production line for an example of
high reliability soldering.
PCL6000
602-13375-01
6-4
Customer Service
This page is intentionally blank.
PCL6000
602-13375-01
Moseley PCL6000
7
7-1
Schematics and Assembly Drawings
7.1 PCL 6000-220 STD (602-10300-71 Rev A)
DESCRIPTION
ENG. DWG. No.
REV
LEVEL
REV
DATE
Transmitter Final Assembly
Transmitter Audio/Power Supply Schematic
Transmitter Audio/Power Supply Assembly
Transmitter RF Module Schematic
Transmitter RF Module Assembly
RF Amplifier Schematic
RF Amplifier Assembly
6020 Receiver Final Assembly
6030 Receiver Final Assembly
Receiver Audio/Power Supply Schematic
Receiver Audio/Power Supply Assembly
Receiver RF Module Schematic
Receiver RF Module (6030) Assembly
IF Demod (6020) Schematic
IF Demod (6020) Assembly
Double Converter(6030) Schematic
Double Converter(6030) Assembly
FM Demod (6030) Schematic
FM Demod (6030) Assembly
21B2890
91B7444
20B3023
600-10227-01
930-03462-01
91A7456
20B3037
21B2891-3
21B2892-3
600-10710-01
20B3024
600-10228-01
930-03595-01
91B7375
20B2941-2
91B7451
20B3039
91B7387
20B2949
C
D
D
H
H
B
B
D
D
B
C
K
J
C
C
E
E
F
G
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
NOTICE:
This section contains schematic and assembly drawings referred to in Sections 1 and 4. For
information on individual drawings refer to Section 1 under "System Description" and/or Section
4 under "Module Description".
PCL6000
602-13375-01
7-2
Schematic and Assembly Drawings
21B2890 Rev C
6010 Transmitter Final Assembly (220 MHz)
PCL6000
602-13375-01
Moseley PCL6000
7-3
91A7444 Rev D
Transmitter Audio/Power Supply Schematic, p. 1 of 3
PCL6000
602-13375-01
7-4
Schematic and Assembly Drawings
91A7444 Rev D
Transmitter Audio/Power Supply Schematic, p. 2 of 3
PCL6000
602-13375-01
Moseley PCL6000
7-5
91A7444 Rev D
Transmitter Audio/Power Supply Schematic, p. 3 of 3
PCL6000
602-13375-01
7-6
Schematic and Assembly Drawings
20D3023 Rev D
Transmitter Audio/Power Supply Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-7
600-10227-01 REV H
Transmitter RF Module Schematic, p. 1 of 4
PCL6000
602-13375-01
7-8
Schematic and Assembly Drawings
600-10227-01 REV H
Transmitter RF Module Schematic, p. 2 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-9
600-10227-01 REV H
Transmitter RF Module Schematic, p. 3 of 4
PCL6000
602-13375-01
7-10
Schematic and Assembly Drawings
600-10227-01 REV H
Transmitter RF Module Schematic, p. 4 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-11
930-03462-01 Rev H
Transmitter RF Module Assembly
PCL6000
602-13375-01
7-12
Schematic and Assembly Drawings
91A7456 Rev B
RF Amplifier (220 MHz) Schematic
PCL6000
602-13375-01
Moseley PCL6000
7-13
20B3037 Rev B
RF Amplifier (220 MHz) Assembly
PCL6000
602-13375-01
7-14
Schematic and Assembly Drawings
21B2891 Rev D
6020 Receiver Final Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-15
21B2892 Rev D
6030 Receiver Final Assembly
PCL6000
602-13375-01
7-16
Schematic and Assembly Drawings
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 1 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-17
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 2 of 4
PCL6000
602-13375-01
7-18
Schematic and Assembly Drawings
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 3 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-19
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 4 of 4
PCL6000
602-13375-01
7-20
Schematic and Assembly Drawings
20B3024 Rev C
Receiver Audio/Power Supply Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-21
600-10228-01 Rev K
Receiver RF Module Schematic, p. 1 of 4
PCL6000
602-13375-01
7-22
Schematic and Assembly Drawings
600-10228-01 Rev K
Receiver RF Module Schematic, p. 2 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-23
600-10228-01 Rev K
Receiver RF Module Schematic, p. 3 of 4
PCL6000
602-13375-01
7-24
Schematic and Assembly Drawings
600-10228-01 Rev K
Receiver RF Module Schematic, p. 4 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-25
930-03595-01 Rev J
Receiver RF Module (6030) Assembly
PCL6000
602-13375-01
7-26
Schematic and Assembly Drawings
91B7375 Rev C
IF Demod (6020) Schematic
PCL6000
602-13375-01
Moseley PCL6000
7-27
20B2941 Rev C
IF DEMOD (6020) Assembly
PCL6000
602-13375-01
7-28
Schematic and Assembly Drawings
91B7451 Rev E
Double Converter/LO3 (6030) Schematic
PCL6000
602-13375-01
Moseley PCL6000
7-29
20B3039 Rev E
Double Converter/LO3 (6030) Assembly
PCL6000
602-13375-01
7-30
Schematic and Assembly Drawings
91B7387 Rev F
FM Demod (6030) Schematic
PCL6000
602-13375-01
Moseley PCL6000
7-31
20B2949 Rev G
FM Demod (6030) Assembly
PCL6000
602-13375-01
7-32
Schematic and Assembly Drawings
7.2 PCL 6000-330/450 STD
DESCRIPTION
ENG. DWG. No.
REV
LEVEL
REV
DATE
Transmitter Final Assembly (330MHz)
Transmitter Final Assembly (450MHz)
Transmitter Audio/Power Supply Schematic
Transmitter Audio/Power Supply Assembly
Transmitter RF Module Schematic
Transmitter RF Module Assembly
RF Amplifier Schematic (330MHz)
RF Amplifier Assembly (330MHz)
RF Amplifier Schematic (450MHz)
RF Amplifier Assembly (450MHz)
6020 Receiver Final Assembly (330/450)
6030 Receiver Final Assembly (330/450)
Receiver Audio/Power Supply Schematic
Receiver Audio/Power Supply Assembly
Receiver RF Module Schematic
Receiver RF Module (6030) Assembly
IF Demod (6020) Schematic
IF Demod (6020) Assembly
Double Converter(6030) Schematic
Double Converter(6030) Assembly
FM Demod (6030) Schematic
FM Demod (6030) Assembly
21B2890-4
21B2890-5
91B7444
20B3023
600-10227-01
930-03462-01
91A7459
20B3038
91C7396
20B2958
21B2891-4
21B2892-4
600-10710-01
20B3024
600-10228-01
20B3107-3
91B7375
20B2941-2
91B7451
20B3039
91B7387
20B2949
D
D
D
D
H
H
A
A
B
D
D
D
B
C
K
B
C
C
E
E
F
G
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
08-95
NOTICE:
This section contains schematic and assembly drawings referred to in Sections 1 and 4. For
information on individual drawings refer to Section 1 under "System Description" and/or Section
4 under "Module Description".
PCL6000
602-13375-01
Moseley PCL6000
7-33
21B2890-4 Rev D
6010 Transmitter Final Assembly (330 MHz)
PCL6000
602-13375-01
7-34
Schematic and Assembly Drawings
21B2890-5 Rev D
6010 Transmitter Final Assembly (450 MHz)
PCL6000
602-13375-01
Moseley PCL6000
7-35
91A7444 Rev D
Transmitter Audio/Power Supply Schematic, p. 1 of 3
PCL6000
602-13375-01
7-36
Schematic and Assembly Drawings
91A7444 Rev D
Transmitter Audio/Power Supply Schematic, p. 2 of 3
PCL6000
602-13375-01
Moseley PCL6000
7-37
91A7444 Rev D
Transmitter Audio/Power Supply Schematic, p. 3 of 3
PCL6000
602-13375-01
7-38
Schematic and Assembly Drawings
20D3023 Rev D
Transmitter Audio/Power Supply Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-39
600-10227-01 REV H
Transmitter RF Module Schematic, p. 1 of 4
PCL6000
602-13375-01
7-40
Schematic and Assembly Drawings
600-10227-01 REV H
Transmitter RF Module Schematic, p. 2 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-41
600-10227-01 REV H
Transmitter RF Module Schematic, p. 3 of 4
PCL6000
602-13375-01
7-42
Schematic and Assembly Drawings
600-10227-01 REV H
Transmitter RF Module Schematic, p. 4 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-43
930-03462-013 Rev H
Transmitter RF Module Assembly
PCL6000
602-13375-01
7-44
Schematic and Assembly Drawings
91A7459 Rev A
RF Amplifier (330 MHz) Schematic
PCL6000
602-13375-01
Moseley PCL6000
7-45
20B3038 Rev A
RF Amplifier (330 MHz) Assembly
PCL6000
602-13375-01
7-46
Schematic and Assembly Drawings
91C7396 Rev B
RF Amplifier (450 MHz) Schematic
PCL6000
602-13375-01
Moseley PCL6000
7-47
20B2958 Rev D
RF Amplifier (450 MHz) Assembly
PCL6000
602-13375-01
7-48
Schematic and Assembly Drawings
21B2891-4 Rev D
6020 Receiver Final Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-49
21B2892-4 Rev D
6030 Receiver Final Assembly
PCL6000
602-13375-01
7-50
Schematic and Assembly Drawings
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 1 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-51
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 2 of 4
PCL6000
602-13375-01
7-52
Schematic and Assembly Drawings
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 3 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-53
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 4 of 4
PCL6000
602-13375-01
7-54
Schematic and Assembly Drawings
20B3024 Rev C
Receiver Audio/Power Supply Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-55
600-10228-01 Rev K
Receiver RF Module Schematic, p. 1 of 4
PCL6000
602-13375-01
7-56
Schematic and Assembly Drawings
600-10228-01 Rev K
Receiver RF Module Schematic, p. 2 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-57
600-10228-01 Rev K
Receiver RF Module Schematic, p. 3 of 4
PCL6000
602-13375-01
7-58
Schematic and Assembly Drawings
600-10228-01 Rev K
Receiver RF Module Schematic, p. 4 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-59
930-03454-01_J330_450_RX_RF
Receiver RF Module (6030) Assembly
PCL6000
602-13375-01
7-60
Schematic and Assembly Drawings
91B7375 Rev C
IF Demod (6020) Schematic
PCL6000
602-13375-01
Moseley PCL6000
7-61
20B2941-2 Rev C
IF DEMOD (6020) Assembly
PCL6000
602-13375-01
7-62
Schematic and Assembly Drawings
91B7451 Rev E
Double Converter/LO3 (6030) Schematic
PCL6000
602-13375-01
Moseley PCL6000
7-63
20B3039 Rev E
Double Converter/LO3 (6030) Assembly
PCL6000
602-13375-01
7-64
Schematic and Assembly Drawings
91B7387 Rev F
FM Demod (6030) Schematic
PCL6000
602-13375-01
Moseley PCL6000
7-65
20B2949 Rev G
FM Demod (6030) Assembly
PCL6000
602-13375-01
7-66
Schematic and Assembly Drawings
7.3 PCL 6000 950 MHz STD
DESCRIPTION
ENG. DWG. No.
REV
LEVEL
Transmitter Final Assembly
Transmitter Audio/Power Supply Schematic
Transmitter Audio/Power Supply Assembly
Transmitter RF Module Schematic
Transmitter RF Module Assembly
RF Amplifier Schematic
RF Amplifier Assembly
6020 Receiver Final Assembly
6030 Receiver Final Assembly
6060 Receiver Final Assembly
Receiver Audio/Power Supply Schematic
Receiver Audio/Power Supply Assembly
Receiver RF Module Schematic
Receiver RF Module (6020/6030) Assembly
Receiver RF Module (6060) Assembly
Preamp/1st Mixer (6060) Schematic
Preamp/1st Mixer (6060) Assembly
IF Demod (6020) Schematic
IF Demod (6020) Assembly
Double Converter/LO3 (6030/6060)
Schematic
Double Converter/LO3 (6030/6060) Assembly
FM Demod (6030/6060) Schematic
FM Demod (6030/6060) Assembly
Adjacent Channel Filter (6060) Schematic
Adjacent Channel Filter (6060) Assembly
21B2890-1
91B7444
20B3023
600-10227-01
930-03462-01
91B7379
930-02936-03
21B2891-1
21B2892-1
21B2915
600-10710-01
20B3024
600-10228-01
930-03470-01
930-03595-01
91D7274-2
20D2827
91B7375
20B2941
91B7451
G
D
D
H
H
C
T
D
D
D
B
C
K
J
J
J
P1
C
C
E
20B3039
91B7387
20B2949
91B7502
20B3089
E
F
G
1
1
NOTICE:
This section contains schematic and assembly drawings referred to in Sections 1 and 4. For
information on individual drawings refer to Section 1 under "System Description" and/or Section
4 under "Module Description".
PCL6000
602-13375-01
Moseley PCL6000
7-67
21D2890-1 Rev G
6010 Transmitter Final Assembly (950 MHz)
PCL6000
602-13375-01
7-68
Schematic and Assembly Drawings
91B7444 Rev D
Transmitter Audio/Power Supply Schematic, p. 1 of 3
PCL6000
602-13375-01
Moseley PCL6000
7-69
91B7444 Rev D
Transmitter Audio/Power Supply Schematic, p. 2 of 3
PCL6000
602-13375-01
7-70
Schematic and Assembly Drawings
91B7444 Rev D
Transmitter Audio/Power Supply Schematic, p. 3 of 3
PCL6000
602-13375-01
Moseley PCL6000
7-71
20B3023 Rev D
Transmitter Audio/Power Supply Assembly
PCL6000
602-13375-01
7-72
Schematic and Assembly Drawings
600-10227-01 REV H
Transmitter RF Module Schematic, p. 1 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-73
600-10227-01 REV H
Transmitter RF Module Schematic, p. 2 of 4
PCL6000
602-13375-01
7-74
Schematic and Assembly Drawings
600-10227-01 REV H
Transmitter RF Module Schematic, p. 3 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-75
600-10227-01 REV H
Transmitter RF Module Schematic, p. 4 of 4
PCL6000
602-13375-01
7-76
Schematic and Assembly Drawings
930-03462-01 Rev H
Transmitter RF Module Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-77
91B7379 Rev C
RF Amplifier (950 MHz, 6w) Schematic
PCL6000
602-13375-01
7-78
Schematic and Assembly Drawings
930-02936-03 Rev T
RF Amplifier (950 MHz,6w) Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-79
21B2891-1 Rev D
6020 Receiver Final Assembly
PCL6000
602-13375-01
7-80
Schematic and Assembly Drawings
21B2892-1 Rev D
6030 Receiver Final Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-81
21B2915 Rev D
6060 Receiver Final Assembly
PCL6000
602-13375-01
7-82
Schematic and Assembly Drawings
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 1 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-83
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 2 of 4
PCL6000
602-13375-01
7-84
Schematic and Assembly Drawings
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 3 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-85
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 4 of 4
PCL6000
602-13375-01
7-86
Schematic and Assembly Drawings
20B3024 Rev C
Receiver Audio/Power Supply Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-87
600-10228-01 Rev K
Receiver RF Module Schematic, p. 1 of 4
PCL6000
602-13375-01
7-88
Schematic and Assembly Drawings
600-10228-01 Rev K
Receiver RF Module Schematic, p. 2 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-89
600-10228-01 Rev K
Receiver RF Module Schematic, p. 3 of 4
PCL6000
602-13375-01
7-90
Schematic and Assembly Drawings
600-10228-01 Rev K
Receiver RF Module Schematic, p. 4 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-91
930-03740-01 Rev J
Receiver RF Module (6020/6030) Assembly
PCL6000
602-13375-01
7-92
Schematic and Assembly Drawings
930-03595-01 Rev J
Receiver RF Module (6060) Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-93
91D7274-2 Rev J
Preamp/1st Mixer (6060) Schematic
PCL6000
602-13375-01
7-94
Schematic and Assembly Drawings
20D2827 Rev P1
Preamp/1st Mixer (6060) Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-95
91B7375-Rev C
IF Demod (6020) Schematic
PCL6000
602-13375-01
7-96
Schematic and Assembly Drawings
20B2941 Rev C
IF Demod (6020) Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-97
91B7451 Rev E
Double Converter/LO3 (6030/6060) Schematic
PCL6000
602-13375-01
7-98
Schematic and Assembly Drawings
20B3039 Rev E
Double Converter/LO3 (6030/6060) Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-99
91B7387 Rev F
FM Demod (6030/6060) Schematic
PCL6000
602-13375-01
7-100
Schematic and Assembly Drawings
20B2949 Rev G
FM Demodulator (6030/6060) Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-101
91B7502 Rev 1
Adjacent Channel Filter (6060) Schematic
PCL6000
602-13375-01
7-102
Schematic and Assembly Drawings
20B3089 Rev 1
Adjacent Channel Filter Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-103
7.4 PCL 6000 1.7 GHz Standard System
DESCRIPTION
ENG. DWG. No.
REV
LEVEL
Transmitter Final Assembly
Transmitter Audio/Power Supply Schematic
Transmitter Audio/Power Supply Assembly
Transmitter RF Module Schematic
Transmitter RF Module Assembly
RF Amplifier (1.7 GHz, 6w) Schematic
RF Amplifier (1.7 GHz, 6w) Assembly
6030 Receiver Final Assembly
Receiver Audio/Power Supply Schematic
Receiver Audio/Power Supply Assembly
Receiver RF Module Schematic
Receiver RF Module (6030) Assembly
Double Converter(6030) Schematic
Double Converter(6030) Assembly
FM Demod (6030) Schematic
FM Demod (6030) Assembly
930-02936-03
91A7444
20D3023
600-10227-01
930-03462-01
930-12053-02
930-12052-02
21B2927
600-10710-01
20B3024
600-10228-01
930-03546-01
91B7451
20B3039
91B7387
20B2949
U
B
D
H
H
B
B
C
B
C
K
G
E
E
F
G
NOTICE:
This section contains schematic and assembly drawings referred to in Sections 1 and 4. For
information on individual drawings refer to Section 1 under "System Description" and/or Section
4 under "Module Description".
PCL6000
602-13375-01
7-104
Schematic and Assembly Drawings
21B2926 Rev C
6010 Transmitter Final Assembly (950 MHz)
PCL6000
602-13375-01
Moseley PCL6000
7-105
91B7444 Rev B
Transmitter Audio/Power Supply Schematic, p. 1 of 3
PCL6000
602-13375-01
7-106
Schematic and Assembly Drawings
91B7444 Rev B
Transmitter Audio/Power Supply Schematic, p. 2 of 3
PCL6000
602-13375-01
Moseley PCL6000
7-107
91B7444 Rev B
Transmitter Audio/Power Supply Schematic, p. 3 of 3
PCL6000
602-13375-01
7-108
Schematic and Assembly Drawings
20B3023 Rev D
Transmitter Audio/Power Supply Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-109
600-10227-01 REV H
Transmitter RF Module Schematic, p. 1 of 4
PCL6000
602-13375-01
7-110
Schematic and Assembly Drawings
600-10227-01 REV H
Transmitter RF Module Schematic, p. 2 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-111
600-10227-01 REV H
Transmitter RF Module Schematic, p. 3 of 4
PCL6000
602-13375-01
7-112
Schematic and Assembly Drawings
600-10227-01 REV H
Transmitter RF Module Schematic, p. 4 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-113
930-03462-01 Rev H
Transmitter RF Module Assembly
PCL6000
602-13375-01
7-114
Schematic and Assembly Drawings
930-12053-02 Rev. B
RF Amplifier (1.7GHz, 6w) Schematic, p. 1 of 2
PCL6000
602-13375-01
Moseley PCL6000
7-115
930-12053-02 Rev. B
RF Amplifier (1.7GHz, 6w) Schematic, p. 2 of 2
PCL6000
602-13375-01
7-116
Schematic and Assembly Drawings
930-12052-02 REV B
RF Amplifier (1.7 GHz,6w) Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-117
21B2927 Rev C
6030 Receiver Final Assembly
PCL6000
602-13375-01
7-118
Schematic and Assembly Drawings
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 1 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-119
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 2 of 4
PCL6000
602-13375-01
7-120
Schematic and Assembly Drawings
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 3 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-121
600-10710-01 Rev B
Receiver Audio/Power Supply Schematic, p. 4 of 4
PCL6000
602-13375-01
7-122
Schematic and Assembly Drawings
20B3024 Rev C
Receiver Audio/Power Supply Assembly
PCL6000
602-13375-01
Moseley PCL6000
7-123
600-10228-01 Rev K
Receiver RF Module Schematic, p. 1 of 4
PCL6000
602-13375-01
7-124
Schematic and Assembly Drawings
600-10228-01 Rev K
Receiver RF Module Schematic, p. 2 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-125
600-10228-01 Rev K
Receiver RF Module Schematic, p. 3 of 4
PCL6000
602-13375-01
7-126
Schematic and Assembly Drawings
600-10228-01 Rev K
Receiver RF Module Schematic, p. 4 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-127
930-03546-01 Rev G
Receiver RF Module (6030) Assembly
PCL6000
602-13375-01
7-128
Schematic and Assembly Drawings
91B7451 Rev E
Double Converter/LO3 (6030) Schematic
PCL6000
602-13375-01
Moseley PCL6000
7-129
20B3039 Rev E
Double Converter/LO3 (6030) Assembly
PCL6000
602-13375-01
7-130
Schematic and Assembly Drawings
91B7387-Rev F
FM Demod (6030) Schematic
PCL6000
602-13375-01
Moseley PCL6000
7-131
20B2949 Rev G
FM Demod (6030) Asse mbly
PCL6000
602-13375-01
7-132
Schematic and Assembly Drawings
7.5 Multichannel Option
DESCRIPTION
ENG. DWG. No.
REV
LEVEL
Channel Control Assembly
Channel Control Schematic
PCL6010 Multichannel Option
PCL6020 Multichannel Option
PCL6030 Multichannel Option
20C3104
917515
910-10121-02
910-08614-01
910-08796-01
A
A
C
B
B
NOTICE:
This section contains schematic and assembly drawings referred to in Sections 1 and 4. For
information on individual drawings refer to Section 1 under "System Description" and/or Section
4 under "Module Description".
PCL6000
602-13375-01
Moseley PCL6000
7-133
20C3104 Rev A
Channel Control Assembly
PCL6000
602-13375-01
7-134
Schematic and Assembly Drawings
917515 Rev A
Channel Control Schematic, 1 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-135
917515 Rev A
Channel Control Schematic, 2 of 4
PCL6000
602-13375-01
7-136
Schematic and Assembly Drawings
917515 Rev A
Channel Control Schematic, 3 of 4
PCL6000
602-13375-01
Moseley PCL6000
7-137
917515 Rev A
Channel Control Schematic, 4 of 4
PCL6000
602-13375-01
7-138
Schematic and Assembly Drawings
910-10121-02 Rev C
PCL6010 Multichannel Option
PCL6000
602-13375-01
Moseley PCL6000
7-139
910-08614-01 Rev B
PCL 6020 Multichannel Option
PCL6000
602-13375-01
7-140
Schematic and Assembly Drawings
910-08796-01 Rev B
PCL 6030 Multichannel Option
PCL6000
602-13375-01
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