Emcee HSD Series, HSD-2500 Operation And Maintenance Manual

HSD Series

TM

Transmitters

HSD-2500

OPERATION AND

MAINTENANCE

GUIDE

Release 1.0

®

COMMUNICATIONS

Mountain Top, PA, USA

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HSD SERIES OPERATION AND MAINTENANCE

TABLE OF CONTENTS

1 THE HSD SERIES TRANSMITTER 0VERVIEW .......................................................5

1.1 Introduction: .................................................................................................5

1.2 Safety Warnings and Precautions:.................................................................6

1.2.1 Safety Considerations: ............................................................................6

1.2.2 Safety with Electricity: ............................................................................6

1.2.3 Preventing Electrostatic Discharge Damage: ..........................................7

1.2.4 Emission Notice: .....................................................................................7

1.3 HSD-2500 Design Specifications: ..................................................................9

1.4 Installation: .................................................................................................11

1.5 Operation:...................................................................................................12

1.6 Controls and Indicators:..............................................................................13

1.6.1 Front Panel Controls-Pictorial View: ......................................................14

1.7 List of Interconnecting Diagrams:................................................................14

1.8 List of Schematic Diagrams:........................................................................14

1.9 Warranty and Parts Ordering: .....................................................................14

2 MECHANIAL LEVEL OVERVIEW ........................................................................17

2.1 TRANSMITTER DIS-ASSEMBLY & MODULE LOCATION: ..............................17

2.1.1 INTERNAL VIEW-Up-Converter Drawer: ................................................19

2.1.2 REAR VIEW-Main Chassis:.....................................................................20

2.1.3 INTERNAL VIEW-Main Chassis: .............................................................21

3 CIRCUIT DESCRIPTIONS...................................................................................22

3.1 UP-CONVERTER DRAWER: .........................................................................22

3.1.1 Up-Converter Block Diagram: ...............................................................23

3.2 1

3.3 1 st st

IF Module:...............................................................................................23

Converter Module: ..................................................................................26

3.4 Output Converter Module: ...........................................................................27

3.5 10 MHz Reference Oscillator Module: ..........................................................29

3.6 Control Board: ............................................................................................31

3.7 Display Board: ............................................................................................34

3.8 Driver Amplifier Module:..............................................................................36

3.9 Remote Control/Status Board:.....................................................................37

3.10 Up-Converter Power Supply: .....................................................................37

3.11 Main Chassis:............................................................................................38

3.11.1 Main Chassis Block Diagram ...............................................................38

3.12 +12 Volt Power Supply System ..................................................................39

3.13 Power Divider Module ...............................................................................39

3.14 12.5 WATT AMPLIFIER: .............................................................................40

3.15 Amplifier Combiner Module: ......................................................................41

3.16 Metering Coupler: .....................................................................................42

3.17 Metering Detector: ....................................................................................42

4 REMOTE STATUS/CONTROL SOFTWARE..........................................................44

5 MAINTENANCE .................................................................................................45

5.1 Periodic Maintenance Schedule: .................................................................45

This is an unpublished work protected by the United States copyright laws and is proprietary to EMCEE Communications.

Disclosure, copying, reproduction, merger, translation, modification, enhancement or use by anyone other than authorized employees or licensees of EMCEE Communications without the prior written consent of EMCEE Communications is strictly prohibited.

Copyright © 2006 EMCEE Communications. All rights reserved.

This copyright notice should not be construed as evidence of publication.

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5.2 Recommended Test Equipment:..................................................................45

5.3 Troubleshooting:.........................................................................................46

5.4 Front Panel Indicators:................................................................................46

5.5 HSD-2500 TROUBLESHOOTING CHART......................................................47

5.6 Output Power Calibration: ...........................................................................49

5.6.1 Forward Power Calibration: ..................................................................50

5.6.2 Reflected Power Calibration:.................................................................51

5.7 Pre-Corrector Adjustment: ..........................................................................52

5.8 FREQUENCY PROGRAMMING: ....................................................................53

5.8.1 ITFS/MMDS Channel Programming: .......................................................54

5.8.2 EBS/BRS Channel Programming: ..........................................................55

5.9 Interpreting Amplifier Fault Indications: ......................................................56

5.10 Calibrating Voltage Indications:.................................................................57

6 PARTS LISTS ....................................................................................................58

7 SCHEMATIC DIAGRAMS....................................................................................73

8 OPERATING MANUAL RELEASE NOTES ...........................................................95

TABLE OF FIGURES

Figure 1: Up-Converter Interconnection Diagram ................................................74

Figure 2: Transmitter Interconnect Diagram........................................................75

Figure 3: 1st IF, Schematic Diagram ....................................................................76

Figure 4: 1st IF, Component Layout .....................................................................77

Figure 5: Output Converter, Schematic Diagram .................................................78

Figure 6: Output Converter, Component Layout...................................................79

Figure 7: Driver Amplifier, Schematic Diagram ....................................................80

Figure 8: Driver Amplifier, Component Layout .....................................................81

Figure 9: 10 MHz Reference, Schematic Diagram ................................................82

Figure 10: 10 MHz Reference, Component Layout................................................83

Figure 11: First Converter, Schematic Diagram ...................................................84

Figure 12: First Converter, Component Layout ....................................................85

Figure 13: Display Board, Schematic Diagram.....................................................86

Figure 14: Display Board, Component Layout ......................................................87

Figure 15: Control Board, Schematic Diagram.....................................................88

Figure 16: Control Board, Component Layout ......................................................89

Figure 17: 12.5 Watt Amplifier, Schematic Diagram .............................................90

Figure 18: 12.5 Watt Amplifier, Component Layout ..............................................91

Figure 19: Metering Detector, Schematic Diagram ..............................................92

Figure 20: Metering Detector, Component Layout................................................93





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TABLE OF TABLES

Table 1: 1st IF Board Parts List............................................................................59

Table 2: Output Converter Parts List ...................................................................61

Table 3: Driver Amplifier Parts List ......................................................................63

Table 4: 10 MHz Reference Module Parts List ......................................................64

Table 5: 1st Converter Module Parts List .............................................................66

Table 6: Display Board Parts List.........................................................................68

Table 7: Control Board Parts List.........................................................................69

Table 8: 12.5 Watt Amplifier Parts List .................................................................70

Table 9: Metering Detector Parts List ..................................................................72

1





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1 THE HSD SERIES TRANSMITTER 0VERVIEW

1.1 Introduction:

The EMCEE

HSD Series

TM transmitter is a modular, frequency agile, format agile, selfcontained S-Band broadcast transmitter that is designed to provide up to 400 Watts peak power or 100 Watts average power on any FCC or CCIR specified channel from 2500MHz to 2700MHz. The transmitter will accept either a digital input or a composite analog input.

The transmitter is also available configured for multi-channel operation. To provide maximum performance and reliability, the HSD Series

TM Transmitter is completely solidstate. The transmitter design includes IF linearity pre-correction, which minimizes the inchannel intermodulation products; oscillator and converter circuits optimized for very low phase and FM noise, which allows for depth of modulation up to 256QAM; automatic internal or external synthesizer lock, for use with phase-locked systems; and infinite tuning, by 1 MHz steps, across the entire band . The transmitter is designed to provide configurable and upgradeable output power, requiring only a 6RU rack footprint. It features minimum weight and low power consumption; and employs comprehensive indication, control, and protection circuitry. To provide additional reliability, the

HSD Series

TM transmitter system is designed to utilize a redundant N+1 power supply and power distribution system (HSD

PLUS

). The transmitter will facilitate either digital or analog transmission, and is compatible with all world analog transmission formats.

Each transmitter is composed of a Power Supply assembly, Up-Converter Assembly, one or more 12.5 watt Final Amplifiers, and an optional Control/Status interface. The

Control/Status interface allows the unit to be remotely controlled via computer and graphically shows the status of the transmitter; aiding the operator during turn-on, operation and maintenance.

Optional output filters are available for additional suppression of out of channel products.

The HSD Transmitters are available in the following output power configurations:

¾

¾

HSD-250 1

HSD-1250/HSD-1250

¾ HSD-2500/HSD-2500

PLUS

PLUS

¾ HSD-3750/HSD-3750

PLUS

¾ HSD-5000/HSD-5000

PLUS

¾ HSD-10000/HSD-10000

PLUS

10 Watt Peak/2.5 Watt Average Power

50 Watt Peak/1-12.5 Watt Average Power

100 Watt Peak/2-25 Watt Average Power

150 Watt Peak/3-37.5 Watt Average Power



The HSD-XXX

PLUS

configurations feature N+1 redundant power supplies.

1 The HSD-250 is used as the Up-Converter/Driver assembly for all other models.





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1.2 Safety Warnings and Precautions:

This section provides information related to the safe installation and use of the

EMCEE HSD-2500. It contains the following sections: o

Safety o

Safety with electricity o

Preventing Electrostatic Discharge Damage o

Emission

1.2.1 Safety Considerations:

Follow these guidelines to ensure general safety:

•

•

•

•

•

Keep the chassis area clear and dust free during and after installation.

Keep tools away from walkways where you and others could trip over them.

Do not wear loose clothing that could get caught in the chassis. Fasten your tie or scarf and sleeves.

Wear safety glasses when working under conditions that might be hazardous to your eyes.

Do not perform any action that creates a hazard to people or that makes equipment unsafe.

1.2.2 Safety with Electricity:

Warning!

This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents.

Warning!

Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the objects to the terminals.

Warning! Unplug the power cord before you work on any system that does not have an on/off switch.





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Follow these guidelines when working with equipment powered by electricity:

•

•

•

•

•

•

•

Locate the emergency power-off switch for the room in which you are working.

Before working on the equipment, unplug the power cord.

Disconnect all power before doing the following: o

Installing or removing the chassis o

Performing a hardware repair

Do not work alone when potentially hazardous conditions exist.

Never assume that power has been disconnected from a circuit. Always check.

Look carefully for possible hazards in your work area, such as moist floors, ungrounded power extension cables, and missing safety ground wires.

If an electrical accident occurs, proceed as follows: o

Use caution. o o o

Unplug the power cord.

If possible send another person to get medical aid. Otherwise, assess the victim's condition and then call for help.

Determine if the victim needs rescue breathing or external cardiac compressions, and then take appropriate action.

1.2.3 Preventing Electrostatic Discharge Damage:

Electrostatic discharge can damage or impair electrical circuitry. It occurs when electronic components are handled improperly. Always follow electrostatic discharge prevention procedures when removing or replacing components. Ensure that the chassis is electrically connected to earth ground using an electrostatic discharge mat or a ground wire. Wear an electrostatic discharge-preventive wrist strap, ensuring that it makes good skin contact and is connected to an unpainted surface on the chassis frame. If no wrist strap is available, ground yourself by touching the metal part of the chassis while handling a component.

1.2.4 Emission Notice:

This equipment generates, uses, and will radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause





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HSD SERIES OPERATION AND MAINTENANCE harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna of the affected equipment, or relocate the transmitter or transmit antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the factory or an experienced radio/TV engineer for help.





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1.3 HSD-2500 Design Specifications:

Output Power

Analog

Digital

Emissions

Analog

5-100W peak visual

.25~5W ± 1 W average aural

2~25W average power

250KF3E aural

4~256 QAM (DVB-C) or 8/16 VSB (ATSC),

6M00D7W

Digital

Monochrome Standards B/G, D/K, M/ N, I

Color Transmission NTSC, PAL, or SECAM

Frequency Response

Channel Bandwidths

±1dB from 500kHz to 4.0MHz M/N, 5.0 MHz

B/G, 6.0 MHz D/K

MHz

6 MHz, 7 MHz, or 8 MHz

Spectral Regrowth

Frequency Stability

Visual Output Power Stability

Error Vector Magnitude

-40dB @ channel edge ±.25 MHz

-60dB ±3 MHz from channel edge

±0.5dB

≤ 1.5%

Visual Carrier ±1kHz

Aural Carrier ±1kHz

Output Variation 2%

Output Regulation 3%

Spurious Products -60dB (below peak sync in analog mode)

In-Band Intermodulation Products -52dB (below peak sync in analog mode)

Out-of-band Intermod Products -40dB (below peak sync in analog mode)

Differential Gain 10%

±10 ° Differential Phase

Phase Noise

Low Frequency Linearity

-100dBc @ 10 KHz (Synth. Std.)

-110 dBc @10 KHz (Osc/Mult. Opt.)

5%





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2T Pulse K-Factor 3% minimum

12.5T Baseline Disturbance 5% maximum

Envelope Delay ±5ns

Output Impedance 50 ohms/Female N-Type

IF Input Impedance 75 ohms unbalanced/Female BNC

Video Signal to Noise

Digital Signal to Noise

-55dB

34dB

Hum and Noise -50dB

IF Input Level -5 to -25 dBm nominal

Harmonic Distortion <1%

Frequency Response ±.1dB, 50Hz to 15 kHz

Aural FM Noise -60dB

Aural AM Noise -60dB

0 ° C to +50 ° C Operating Temperature

RF Output Connector

Power Requirements

Power Consumption

Safety Certifications

Type ‘N’ Female, 50 Ω

85~264 VAC ± 15% @ 47-63Hz

HSD-2500 750 Watts

UL (US and Canada), CE, TUV, ITE

Mechanical Dimensions (w/o brackets) 10.5"H (6RU) x 17.0"W x 24.125"D

Note: FCC type acceptance for the HSD Series transmitters is in process.





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1.4 Installation:

Except where otherwise noted, the connectors mentioned in the following instructions are located on the rear of the transmitter.

1. After unpacking the transmitter, a thorough inspection should be conducted to reveal any damage which may have occurred during shipment. If damage is found, immediately notify the shipping agency and advise EMCEE

Communications Customer Service or its field representative. Check to see if any supplied accessories are included in the equipment package. Also check to see that any connectors, cables or miscellaneous equipment, which may have been ordered separately, are included.

2. The unit is supplied with the following OEM accessories; verify that these accessories are present for the installation.

Description

Rack Mount Rails

Part Number OEM Vendor

Devices

Installation & Maintenance Guide HSD-2500

Operating Manual on CD

EMCEE

HSD-2500-OMCD EMCEE

3. Using the supplied rack mount rails, install the transmitter in a 19 inch equipment rack located in a clean, weatherproof environment. Be sure to provide adequate ventilation for exhaust ventilation at the front and rear of the transmitter’s cabinet. It is important to maintain the transmitter's ambient temperature within the 0 ° C and +50 ° C limits. Cooler ambient temperatures will provide increased reliability. Also insure that the rear of the transmitter is far enough from any obstruction so that the transmission line to the antenna or channel combiner can be easily connected to the transmitter's N-Type RF OUT connector. This connector is located in the upper right corner of the cabinet's rear panel. The transmitter's permanent location should be near an appropriate AC receptacle that has a minimum power capacity of 800 Watts.

IMPORTANT!

Do not apply AC power to the transmitter at this time since its RF output must be properly loaded before being placed in operation.

4. Install a TYPE ‘N’ semi-rigid cable between the RF Output Connector and the channel combiner or antenna connector. Install a BNC cable between the connector labeled composite IF Output on the modulator to the IF Input on the transmitter Up-converter rear panel.





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5. Set all circuit breakers and switches, including the local incoming AC line breaker, to the OFF position. Place an appropriate AC power line protector

(surge suppressor) across the AC line that supplies the transmitter.

6. Connect the transmitters AC power line cable to an appropriate fused AC receptacle.

7. Using an ‘N‘-Type connector, connect the transmitting antenna cable to the transmitter's RF OUT connector located in the upper middle of the cabinet's rear panel.

*Connect the optional remote control computer to the transmitter using the data connector located on the rear of the transmitter cabinet. The computer should have the supplied software installed and operating on the computer.

1.5 Operation:

Assuming the installation instructions of Section 1.4 have been completed and the transmitter is receiving an IF input from the modulator, proceed with the following steps to place the transmitter in operation.

The modulator should be pre-aligned for a Video Input of 1vpp and Audio Input of

0dBm. Verify that the audio and video sources are set to these levels. Adjustment of the aural level and/or video level controls should only be done using the maintenance section of this manual by a trained service technician with the proper test equipment.

The transmitter has been factory aligned for 100 watts visual and 5 watts aural (25 watts average power), with AGC, when the AGC switch is ON. Transmitter power adjustment using the controls accessed through the front panel should be only performed according to the maintenance section of this manual and by properly trained maintenance personnel with the recommended test equipment.

Turn on the two power switches located at the rear of the transmitter. The transmitter will power up in the configuration selected when power was last applied.

The unit is shipped in a default power off configuration, and requires commands from the Control Board for full turn-on. In the Standby state, power is only supplied to the up-converter.

Turn the rear panel AC main power switch to ON, then using the Operate/Standby switch, turn the transmitter to Operate; power is now applied to all sections of the transmitter.





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All of the fans in the front and rear of the transmitter should now be operating; the cabinet ventilation fans force heated air out the front while drawing fresh air through the rear panel.

The transmitter is now in operation providing 25 watts of average power in digital mode, or 100 watts of peak visual and 5 Watts (-13dB) of average aural power in analog mode, to the channel combiner or antenna transmission line.

Check the transmitter's coverage area for clean, sharp television reception. If the reception or picture quality is unsatisfactory, examine the amount of power delivered to the transmitting antenna, and, if necessary, examine the antenna VSWR, and transmission line VSWR to insure maximum radiation.

1.6 Controls and Indicators:

The transmitter up-converter section has front panel push/push switches for

Operate/Standby and AGC on/off control. These switches are located on the left side of the Up-Converter drawer portion of the transmitter. The Up-Converter drawer also has a rear panel AC power switch. There is also a main power switch on the rear of the main transmitter chassis.

The Up-Converter drawer section also has front panel (thru hole) adjustments for

Power Level and AGC Level control. Since the factory has pre-set these calibrations for full power and AGC level, no adjustment is necessary for initial turn-on.

LED indicators are provided for verification of the following operating conditions, and are located on the left side of the Up-Converter drawer. o

Standby/Operate (two color LED, green Operate/yellow Standby) o

Local Oscillator Lock (green) o

IF Input present (green) o

External 10 MHz present (green) o

VSWR Overload condition (red) o

Amplifier Fault condition (red) o

Temperature Fault condition (yellow)

The LCD transmitter meter, located on the right side of the up-converter, has four associated blue LED indicators and a momentary push button selector switch. Each time the switch is pushed, the meter display is incremented through the following measurements, and the associated LED is illuminated. o

Forward o

Reflected o

+12V Supply Voltage o

-12V Supply Voltage





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1.6.1 Front Panel Controls-Pictorial View:

Switching Status Adjustment Metering

1.7 List of Interconnecting Diagrams:

50520000 Interconnection Diagram, Up-Converter Drawer

50500000 Interconnection Diagram, S-Band Transmitter

1.8 List of Schematic Diagrams:

NOTE: MODULE SCHEMATICS ARE LISTED IN THE FOLLOWING NUMERICAL SEQUENCE:

50521002 Schematic Diagram, 1 st IF

50523002 Schematic Diagram, Output Converter

50524002 Schematic Diagram, Driver Amplifier

50525002 Schematic Diagram, 10 MHz Reference

50526002 Schematic Diagram, 1 st Converter

50527002 Schematic Diagram, Display Board

50528002 Schematic Diagram, Control Board

50531002 Schematic Diagram, 12.5 Watt Amplifier

30400038 Schematic Diagram, Metering Detector

1.9 Warranty and Parts Ordering:

Warranty – EMCEE warrants its equipment to be free from defects in material and workmanship for a period of one year after delivery to the customer. Equipment or components returned (prepaid) as defective will be, at EMCEE’s option, repaired or replaced at no charge as long as the equipment or component part in question has





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HSD SERIES OPERATION AND MAINTENANCE not been improperly used or damaged by external causes (e.g., water or lightning).

Semiconductors are excepted from this warranty and shall be warranted for a period of not more than ninety (90) days from date of shipment. Equipment or component parts sold or used by EMCEE, but manufactured by others, shall carry the same warranty as extended to EMCEE by the original equipment manufacturer (OEM).

Equipment Returns – If the customer desires to return a unit, drawer, or module to

EMCEE for repair, follow the procedure described below:

1. Contact EMCEE Customer Service Department by phone or fax, for a Return

Authorization Number.

2. Provide Customer Service with the following information: o

Equipment model and serial numbers. o

Date of purchase. o

Unit input and output frequencies. o

Part number (PN) and Schematic Diagram designator if a module is being sent. o

Detailed information concerning the nature of the malfunction.

The customer shall designate the mode of shipping desired (e.g., Air Freight, UPS,

Fed Ex, etc.). EMCEE will not be responsible for damage to the material while in transit. Therefore, it is of utmost importance that the customer insures the returned item is properly packed.

Parts Ordering – If the customer desires to purchase parts or modules, utilize the following procedure:

1. Contact EMCEE Customer Service by phone or fax indicating the customer's purchase order number. If the purchase order number is provided by phone, written confirmation of the order is required.

2. Also provide the following information: o

The equipment model and serial number. o

The unit input and output frequencies. o

The quantity, description, vendor, number, and designation of the parts needed as found in the Parts Lists subsection of this manual. o

If a module is required, give the part number (PN) and Schematic Diagram designator (e.g., 10331255). o

Designate the mode of shipping desired (e.g., Air Freight, UPS, Fed Ex, etc.). o

Shipping and billing addresses.





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Spare and Replacement Modules and Components – The Spare Modules and

Components section of this manual provides a listing of the modules and some discrete components contained within the transmitter. This list contains those modules or components considered to be essential bench-stock items and should be available to the maintenance technician at all times. The Schematic and/or

Interconnection Diagram is the governing document of this manual. Should there be a discrepancy between a modules or components list and a diagram, the diagram takes precedence. Such a discrepancy is possible since manufacturing changes cannot always be incorporated immediately into the instruction manual.

Component Referencing – The transmitter consists of an up-converter drawer (A1) as well as a number of modules and components mounted in the cabinet.

Components mounted in a module take the drawer number and the module number in addition to a component number. Thus the reference designator A1A1Q1 means transistor Q1 in module A1 of drawer A1. Components mounted in a drawer take only the drawer number and a component number (e.g., A1M1 designates meter M1 of drawer A1). Components mounted directly to the cabinet take only a component number.

For EMERGENCY technical assistance, EMCEE offers a customer service hot line: 1 (570) 261-0004.

Note: EMCEE reserves the right to change or modify the design of this transmitter without prior notice!





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2 MECHANIAL LEVEL OVERVIEW

The transmitter main cabinet (chassis) consists of three sub-chassis module containment areas; the Up-Converter drawer, the Power Supply sub-chassis, and the Power Amplifier sub-chassis.

All of the modules and circuits located in the Up-Converter drawer are accessed through the top of the drawer, and maybe exposed by sliding the drawer outward to the front and removing the lid.

The Power Supply sub-chassis provides space for two power supply backplanes, with each backplane providing three power module positions. The standard configuration for the HSD-2500 provides one backplane in the upper position which accommodates three hot-swappable, plug-in, fan-cooled +12/-12V volt power supply modules. One power supply module is furnished in the standard configuration. An additional backplane may be ordered as optional equipment, which allows for three more power supplies which will provide additional power supply redundancy. Up to six power supply modules may be configured with optional upgrades. Consult the factory for details regarding power supply upgrades.

The Power Amplifier sub-chassis provides space for up to eight 12.5 watt (average power) Power Amplifier modules. The HSD-2500 is configured with two Power

Amplifier modules in the standard configuration. The transmitter may be upgraded to a higher power with the installation of additional modules. Output power configurations up to 400 watt peak/100 watts average power are available. Consult the factory for the details of output power upgrades.

2.1 TRANSMITTER DIS-ASSEMBLY & MODULE LOCATION:

To access the internal portion of the Up-Converter Drawer, use the handles to slide the drawer forward then loosen the four fasteners securing the lid. This exposes the modules, circuit boards, and wiring of the Up-Converter drawer. It is not necessary to slide the main chassis out of the equipment rack to access the internals of the Up-

Converter drawer.

To access the main chassis lower compartments, slide the transmitter out of the rack using the rack slides. Loosen the six fasteners retaining the main chassis top cover, remove the top cover, and then slide out the Up-Converter.

To remove the +12 Volt power supply module, loosen the thumb screw retaining the module and then, using the handles, slide the power supply forward out of the power supply sub-chassis.





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To remove the Power Amplifier module, remove the amplifier status/power connector. Remove the RF input and output connectors. There are four retaining screws that install upward though the bottom of the main chassis into the Power

Amplifier module. Remove the four screws and using the handle slide the Power

Amplifier module forward out of the main chassis.

When tightening the RF connectors during re-assembly, do not over-tighten the connectors.

Important Note: Do not use the cabinet rack ears or module handles to support the weight of the equipment. The handles are only to be used to slide the cabinet or modules in and out of their mounting locations. The rack mount rails must be used to support the weight of the transmitter chassis!

HSD Transmitter Front Panel View

(Fully Loaded Chassis)





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2.1.1 INTERNAL VIEW-Up-Converter Drawer:

The pictorial view of the Up-Converter drawer shows the locations of the 9 modules and circuit boards located in the drawer. The drawer slides out of the main chassis to allow for easy access for service and/or adjustment of the circuit assemblies and the inter-connection wiring.

Note: The Remote Control Board is optional.

1 st IF

BOARD

P/N 50521000

POWER SUPPLY

MODULE

P/N REL-150-2004

REMOTE CONTROL

BOARD

(NOT SHOWN)

DISPLAY

BOARD

P/N 50527000

1 ST CONVERTER

MODULE

P/N 50526000 10 MHz

REFERENCE

P/N 50525000

OUTPUT AMP

MODULE

P/N 50524000

CONTROL

BOARD

P/N 50528000

AMPLIFIER

COOLING

FANS & DUCT

OUTPUT CONVERTER

MODULE

P/N 50523000





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2.1.2 REAR VIEW-Main Chassis:

The pictorial view of the rear of the main chassis shows the input and output connections, the rear panel controls, and cooling fans. A circuit breaker switch is located in the up-converter drawer and on the rear of the main chassis. The chassis interface connectors provide connection to the up-converter tray for -12 volt amplifier power supply, status and control, power detector module output, and optional remote computer control connection.

Note that the main power input cable is not shown.

EXT. 10MHz

REFERENCE

INPUT

UP-CONVERTER

COOLING FANS

CHANNEL

OUTPUT

CONNECTOR

IF INPUT

CONNECTOR

CHASSIS

INTERFACE

CONNECTORS

UP-

CONVERTER

DRAWER

MAIN

CHASSIS

RF OUTPUT

CONNECTOR

AMPLIFIER

COOLING FANS

UP-CONVERTER

POWER SWITCH

MAIN CHASSIS

POWER SWITCH

AC MAINS

POWER INLET





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2.1.3 INTERNAL VIEW-Main Chassis:

The pictorial view of the HSD-2500 main chassis shows the module layout and interconnection cabling which is visible from the top of the chassis with the lid removed and the up-converter drawer slid forward. This chassis is configured with one +12 V Power Supply module and two Power Amplifier modules

UP-CONVERTER

DRAWER

12.5 WATT

POWER AMP

MODULES

POWER

SUPPLY

SUB-CHASSIS

+12 VOLT

POWER SUPPLY

MODULE

DRIVER AMP

POWER OUTPUT

SPLITTER

12 VOLT

POWER SUPPLY

BACKPLANE

MAIN

CHASSIS

POWER

DISTRIBUTION

BLOCK

METERING

COUPLER

POWER

AMP

COOLING

DUCT

RF POWER

OUTPUT

COMBINER

METERING

DETECTOR

MODULE





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3 CIRCUIT DESCRIPTIONS

3.1 UP-CONVERTER DRAWER:

Interconnection Diagram 50520000 D1

Composite Analog Mode:

Visual IF IN (J2)

Aural IF IN (J2)

VISUAL RF OUT (J4)

-0 to -20 dBm peak visual

-13 to -33 dBm average aural

≈ +40dBm peak visual

≈ +27dBm average aural AURAL RF OUT (J4)

Digital Mode:

Digital IF IN (J2)

DIGITAL RF OUT (J4)

-5 to -25 dBm (average power)

≈ +34dBm (average power)

The Up-Converter drawer contains a series of modules which as a group, up-convert the modulator's combined visual and aural IF carriers or digital IF carrier to the selected S-Band output channel providing approximately 34dBm or 2.5 watts

(40dBm of peak visual power and 27dBm of average aural) of power at the channel output jack (J4) located on the rear panel of the up-converter drawer. IF signal processing and frequency dual conversion is accomplished by the chain of an IF

Module (PC1), a 1 st Converter Module (A1), and a Channel Output Converter (A1)

(with the associated circuitry of a Down-Converter, Local Oscillator, and Reference

Oscillator). Signal processing and manual adjustments are provided for in the IF

Module. Front panel adjustments are provided for output power and AGC level.

The up-converter drawer also contains the optional remote control board and the

+12/-12 volt power supply module. For additional information on the remote control/status board see Section 3.10.





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3.1.1 Up-Converter Block Diagram:

IF IN

1 st IF

MODULE

A1

IF

1 st

CONVERTER

MODULE

A2

IF

10 MHz

REFERENCE

MODULE

A5

OUTPUT

CONVERTER

MODULE

A3

RF

EXT. REF.

CONTROL BOARD

PC2

DRIVER

AMP

MODULE

A4

RF OUT

REMOTE

STATUS/CONTROL

STATUS/CONTROL

P/S STATUS/CONTROL

POWER AMP STATUS/CONTROL

REMOTE

CONTROL

BOARD

PC3

DISPLAY BOARD

PC1

UP-CONVERTER DRAWER, D1

3.2 1

st

IF Module:

P/N 50521000

Schematic Diagram 50521002A, D1A1

The first IF module receives the composite analog or digital modulator output at input J1, over a range of -5 to -25dBm. The first IF module performs the following five important functions. First, it provides for AGC control of the incoming IF signal and additional overdrive protection. Second, it provides the Operate/Standby functionality. Third it provides output level control. Fourth, it provides linearity correction. Lastly, it provides output AGC control.

The input AGC loop holds the input signal level constant regardless of the input level, as long as the input range is between -5 and -25 dBm, allowing for a wide variety of modulators to be used without requiring resetting other levels in the transmitter. The AGC loop utilizes the pin diode attenuator network formed around





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CR1 and CR2 to control the level of the input signal providing a constant level at the output of CP1. The attenuator and its related circuitry are unaffected by the type of modulation used. The attenuator output is coupled through C5 to a 23dB gain amplifier U1, which is biased with 4.4 volts @ 50ma. This amplifier output is split by

CP1, a -3dB splitter. One of the splitter legs continues on through the transmit chain; the other leg feeds the detector circuit formed around CR8, producing a detected voltage to drive the input of U3B which exhibits a voltage gain of 11v/v.

The circuitry around U3B provides 3 outputs.

One output of amplifier U3B drives integrator U3A that provides control of the pin diode attenuator, completing and locking the AGC loop. This is accomplished by comparing the U3B output against a reference voltage applied to U3A.

The second output from U3B is connected to comparator U4B. It compares a reference voltage against the voltage developed by CR8 and its following amplifier

U3B. The comparator output at J1 pin 4 then drives the outboard status circuitry in the control board (indicating an IF lock) because the AGC loop is in lock. When this output is high, at or above 2.7 volts, this signals the control board that the IF is in the normal operating range.

The third output from U3B feeds through R41 to comparator U4A. This comparator and its surrounding circuitry provide a mechanism to limit the transmitter from an overshoot of the input AGC loop. If the voltage from U3B exceeds 2.7 volts (the reference voltage) the output of U4A goes high; this then turns on the gate of Q1, which in turn shorts out the voltage control driver (U5A) for the level control pin diode attenuator. This causes the level control pin diode attenuator to impose maximum attenuation, thereby limiting the drive to the following stages of the transmitter.

The Operate/Standby control switching is accomplished through the circuitry of Q2 and Q3, followed by unity gain buffer U6A. If the Operate/Standby control is on

(Operate), the input to U6A is high, which in turn provides an output at U6A. This voltage feeds the Power Adjust control R51. The output of the Power Adjust control feeds another unity gain buffer U5B. The output of U5B feeds voltage amplifier U5A which has a gain of 2.6v/v. This amplifier controls the action of the second pin diode attenuator formed around CR3 and CR4.

The second pin diode attenuator is the level-adjust attenuator. The attenuator output is followed by U2 which has the same gain and is biased the same as U1. The U1 output feeds through transformer T1 which doubles the voltage output. The circuitry associated with the T1 output composes a gain expansion and correction circuit known as the Linearity Corrector.





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The Linearity Corrector is a two-stage, unity gain circuit which compensates for nonlinear distortions generated in the transmitter's 12.5 watt Power Amplifier modules. When properly adjusted, it provides correction to the transmitter’s output signal for sync amplitude, differential gain and intermodulation.

The variable gain expansion network, which provides linearity correction, is centered around dual diode CR5, slope potentiometers R18, unity gain dc amplifiers U8 and threshold potentiometer R58. The threshold (cut-in) potentiometer determines the point on the IF waveform where the correction, or gain expansion, will occur and the slope potentiometer dictates the amount of correction/expansion to be used at that breakpoint. The diode pair forms a nonlinear circuit where each diode is reverse biased and the amount of reverse bias dictates the point at which the diode turns on during the positive and negative cycles of the IF carrier envelope. Each diode is biased using voltages established by the threshold potentiometer in conjunction with dc amplifier U8. L4 and L5 isolate the diode threshold biasing circuitry from the IF signal. When the positive and negative peaks of the visual signal envelope are sufficient to forward bias the diode pair, the pair turns on placing the resistance of its respective slope potentiometer in parallel with the series arm of its L-pad (R17). As a result, the attenuation of the IF carrier is reduced during this period causing the waveform to stretch. Slope control R18 is used to correct for the compression slope of the output amplifiers.

The output of the Linearity Corrector circuit feeds through a “T” attenuator formed by

R20, R21, and R22. The signal then feeds the output pin diode attenuator (CR6 and

CR7) which is part of the output AGC loop. The output AGC provides power output stability over a wide operating temperature range. The AGC range is approximately

3dB. The AGC control input at J1 pin 7 (E6) feeds the gate of Q4, a logic level switching FET which in turn controls analog switch U10. When the AGC is off, the gate of Q4 is high and the drain is low so pin 2 of the switch is connected to pin 1, providing a 0 volt drive to U11A which then eliminates control of the pin diode attenuator, and thereby setting the AGC range to its midpoint.

Conversely, if the gate of Q4 is switched low (AGC on) the switch connects pins 8 and 1, connecting the AGC control circuitry composed of U9 and U11. The AGC loop action is controlled by the Power Adjust potentiometer R51. U9 is a difference amplifier which compares the voltage coming from the Detector Module forward power sample input at J1 pin 6 (E5) and the voltage from the power adjustment at

R51. The forward sample feeds through amplifier U9B which has a gain of 2. The resultant AGC action is attempting to provide 0 volts at the output of U9A by forcing the level of the forward sample input to be the same as the reference setting of R51.

Potentiometer R64 (Sample Adjust) sets the operating window of the AGC. To set the AGC, turn on the AGC and set the Sample Adjust control (R64) for the same power as the level with the AGC in the off mode.





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3.3 1

st

Converter Module:

P/N 50526000


Digital Mode:

IF IN (J1)

IF OUT (J2)

Gain (J1-J2)

-15dBm peak visual (average power)

-15dBm peak visual (average power)

0dB

Analog Mode:

Visual IF Input (J1)

Aural IF Input (J1)

VISUAL IF OUTPUT (J2)

AURAL IF OUTPUT (J2)

≈ -10dBm peak

≈ -23dBm average

≈ -10dBm

≈ -23dBm

The 1 st Converter Module provides a unity gain VHF conversion of the incoming IF signal. It accepts either an NTSC IF with a center frequency of 44 MHz or a PAL IF with a center frequency of or 37.15 MHz. It employs phase lock loop technology with microprocessor based frequency control.

The module input at J1 comes from the 1 st IF module and has an input signal level of

-15dBm. This input feeds the input port of mixer MX1 which mixes the input signal and the local oscillator input to provide a mixed output frequency of 374 MHz regardless of the input IF frequency.

The output level of the mixer is -22dBm. The mixer output feeds through a 3dB pad to amplifier U1 which exhibits a power gain of 14dB and is biased with 3.2 volts at

45ma. The U1 output is filtered by saw filter FL1 which has an 18 MHz wide pass band and a loss of ~10dB. The network of L2 and C11 provides input matching for the following amplifier which has the same gain and bias as U1. The network of L3 and C12 provide output matching for U2 which then feeds to the module output through a lumped element band pass filter network which is centered at 374 MHz.

The output level at J2 is -15dBm which drives the Output Converter Module.

The local oscillator (LO) circuitry utilizes a phase lock loop (PLL) design. HY1 is a voltage controlled oscillator (VCO) which generates an output frequency of 1672

MHz in NTSC mode, or 1644.6 MHz in PAL mode depending on the switch setting at

R35. The LO output of HY1 feeds through a resistive attenuator/splitter network composed of R9, R10, R11, R12, and R13. One output of the splitter network feeds to U6 which is the phase lock IC. The pre-scalers and dividers in the IC divide the input frequency down to a 200 KHz reference frequency which is compared in the phase detector to the 10 MHz reference signal from J4 which is also divided down to





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200 KHz. The output of the phase detector at pin 3 of U6 feeds the loop filter composed of C24, R7, and C23. R6 and C22 provide additional loop filtering. The circuits above compose the phase lock loop for the oscillator.

The other output of the VCO flows through the R13 leg of the resistive attenuator/splitter into amplifier U3 which has a gain of ~11dB and is biased with 3.2 volts at 45ma. The U3 output feeds pin 1 of U4 which divides the input frequency by four. This provides a phase noise reduction of approximately 12dB. The output of

U4 on pin 4 is now ¼ the input frequency or 418 MHz in NTSC mode or 411.15 MHz in PAL mode. The U4 output then feeds through amplifier U5 which exhibits a gain of 13dB and is again biased with 3.2 volts at 45ma. The U5 output flows through a low pass filter composed of L5, L6,C45, C46, and C47 to the LO port of mixer MX1 with a power level of ~+8dBm.

The balance of the circuitry of the module is centered around microprocessor U7 which programs the phase lock IC (U6). The circuit between pins 7 and 8 of U7 is the oscillator that provides the clock to U7. The frequency of crystal X1 is 8.898

MHz. Pin 9 is an input read line that sets the frequency to NTSC or PAL mode. The circuit connected to pin 17 provides turn-on reset control. This circuit holds the reset low for a short period of time after the power supply comes up to allow a sufficient time to reach its peak voltage ensuring U7 starts in a known state. U7 always starts up in reset (low) when power is first applied. Pin 34 of U7 is an input line which receives an output from the phase lock IC U6. When the PLL is in lock, U6 pin is high which feeds back to U7 and sets a bit which terminates the programming of the registers of U6. The input to pin 34 is also split and feeds through R26 to the lock status driver Q1. The Q1 output connects to the Control Board through J3.

3.4 Output Converter Module:

P/N 50523000


Digital Mode:

IF Input (J1)

RF OUTPUT (J4)

Gain (J1-J4)

Analog Mode:


Aural IF Input (J1)

VISUAL RF OUTPUT (J4)

AURAL RF OUTPUT (J4)

≈ -15dBm average

≈ 0dBm average

15dB

≈ -10dBm peak

≈ -23dBm average

≈ +6dBm

≈ -7dBm





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The output converter module converts the incoming 374 MHz 1 st IF to the desired output channel (frequency). The module exhibits an end-to-end nominal gain of

15dB. All of the input/output level descriptions for this module are average power for digital operation. If the transmitter is operating with composite analog signals, add 6 dB for the peak visual level at that point of the circuit.

The module circuits work in the following manner. The 374 MHz input level at J3 is

-15dBm average power. The module input from J3 feeds the input port (pin 2) of mixer MX1 which is used to mix the input up to the desired output frequency. The mixer output port (pin 3) has a level of -22dBm. The mixer output feeds through the attenuator formed by R1, R2, and R3, which has a value set by the production department at the factory (See Schematic Diagram Note 2). The attenuated signal feeds through microstrip filter FL1 which has a pass band of 250 MHz and is centered at 2600 MHz. The filter exhibits a loss of about 3dB. The filter output is amplified 11dB by U1 which is biased with 3.5 volts at 60ma. The U1 output is again filtered by FL2 which has the same filter characteristics as FL1. The filter output is amplified by U2 which exhibits a gain of 14dB and is biased in the same way as U1.

The U2 output couples to the module output connecter J4, through coupling capacitor C3, and has a nominal output level of 0dBm.

The local oscillator portion of the module works as follows. HY1 is a voltage controlled oscillator (VCO) which receives its bias on pin 3 and control voltage on pin 2. The VCO output frequency is determined by the function of U5, the phase lock loop (PLL) integrated circuit, and U8 the microprocessor which programs the

PLL IC. The VCO output at P1 feeds a resistive attenuator/splitter formed by R7,

R8, R9, and R10. The R7 output leg of the splitter feeds amplifier U3 which exhibits a gain of 10dB and is biased with 3.2 volts at 45ma. The U3 output drives the LO port of the mixer at a level of 8dBm.

The second leg of the splitter, the R8 and R9 branch, feeds the pre-scalar input of the phase lock loop/synthesizer IC, U5. The divider portion of the PLL IC then divides this input down and compares it to a 1 MHz reference frequency (and phase) developed from the other input divider at pin 8, which divides that input (10 MHz reference) frequency by 10. This process also yields a 1 MHz step size for the synthesizer output frequency. The phase detector output at pin 2 of U5 feeds a loop filter composed of R14, C14, and C15, and has a maximum voltage range of 5 volts.

This conditioned loop output then feeds voltage amplifier U4 which serves to extend the tuning range of the phase detector. Amplifier U4 exhibits a voltage gain of

1.7v/v, thereby providing a VCO loop tuning range of ~8.5 volts. The U4 output then feeds through R11 to the control input of the VCO HY1.

The U8 microprocessor programs the frequency of the PLL integrated circuit. There are three circuits around U8 that contain three surface mount rotary BCD switches,

S1, S2, and S3. These switches set the final programming frequency of the PLL which controls the VCO (LO) output frequency. The LO frequency presented to the mixer needs to be set so that the LO frequency plus the input frequency (374 MHz)





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HSD SERIES OPERATION AND MAINTENANCE equals the output frequency. This constitutes a low side mix with no frequency inversion.

The frequency tuning switches work as follows. The S1 switch selects 1 MHz frequency increments, the S2 switch selects 10 MHz frequency increments, and the

S3 switch selects 100 MHz frequency increments. The 1000 MHz increment (most significant digit) is fixed in the microprocessor and cannot be changed. Note that the allowable range of LO tuning is between 2129 MHz and 2323 MHz, which will yield an output tuning range of 2503 MHz to 2697 MHz, in 1 MHz steps.

U8 utilizes 8.898 MHz crystal X1 and its associated circuitry to control the clock frequency of U8. U9 provides a turn on reset control for U8 which serves to hold the reset for U8 low until the power up voltage reaches a stable 5 volts. This keeps the microprocessor from powering up in an unknown state.

The data, clock, and load enable lines (pins 42, 41, and 40) from U8 provide programming for the PLL IC and they work as follows. There are three 24 bit words that are sequentially clocked into the PLL chip. Each data bit on the data line is followed by a clock pulse on the clock line which increments the shift register by 1.

After 24 bits are clocked into the shift register, the load enable line goes to 5 volts which then latches the program line of U5. The latched program line then allows the program words from U8 to be loaded into the registers of U5. The lock detect output of U5 (pin 14) goes high when U5 senses that the loop is in lock (programmed) and that high is then sent to U8 (pin 34) which terminates the programming sequence.

The lock detect high (5 volts) from U5 is also presented to the base of NPN transistor Q1 which turns on Q1 and therefore puts a low on the collector of Q1.

This triggers the lock detect output J1 pin C which is connected to the control board.

Voltage regulators U7 and U8 provide a +5 volt supply to the circuits on the board.

The voltage regulators are fed from the +12v supply coming in on pin A (FL2) of J1.

3.5 10 MHz Reference Oscillator Module:

P/N 50525000


The reference oscillator module is located in the up-converter drawer. The module accepts an external 10 MHz reference signal input (for phase locked operation) or uses the internal 10 MHz oven controlled oscillator HY1 (for independent operation), to develop the 10 MHz reference signal. An automatic switching function is employed which is provided by U10 and its supporting circuitry.





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The internal oven controlled oscillator provides a 1volt peak to peak sine wave reference output at 10 MHz, and R12 provides a fine tune adjustment for the output of the internal reference frequency. The oven controlled oscillator provides for a stability of .1~.2ppm over the specified operating temperature range. This internal reference is used for the master frequency reference for the transmitter unless an external 10MHz reference signal is present at a sufficient level.

The external 10MHz reference input connects at J2 on the module. This input requires a minimum signal level of 0dBm. The output of J2 splits and one side feeds the network of CR2 and CR3 which provide limiting of the external reference input.

The other side of the split feeds a detector circuit formed by L1 through R2. The detector provides a DC output which feeds the op amp U1B exhibiting a voltage gain of 2. This then feeds U1A and its supporting circuitry which acts as a comparator.

The comparator circuit compares a reference voltage and the level of the detected external reference signal. If the detected input signal is of a sufficient level to exceed the reference voltage, U1A outputs a control voltage to activate switch U10, effectively connecting the external reference through to the next stage of the module. The output of U1A also turns on the associated External 10 MHz indicator on the display board, through Q1.

The switched output of U10 then drives a pin diode attenuator circuit formed by CR4 and CR5 and the associated circuitry. The attenuator circuit is used to control the level of the selected 10 MHz reference signal. The pin diode attenuator is connected to U5, a 20dB gain amplifier, through a low pass filter network. The amplifier output is fed through a second low pass filter network and this signal is split. One side of the U5 output is connected through a two-way (3dB) Wilkinson splitter to the two 10 MHz reference outputs at J3 and J4 which each have an output of 1Vpp.

The other side of the U5 output feeds a detector circuit formed around CR6, which is the first stage of an ALC loop, to control the reference level at the module outputs.

The detector circuit drives op amp U6A which exhibits a gain of 1.37. The circuitry at U6B forms the integrator of the ALC loop, its output controls the base voltage of

Q2 which levers the action of the pin diode attenuator.





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3.6 Control Board:

P/N 50528000

Schematic Diagram 50528002A, D1PC2

The Control Board contains the logic control ladder which provides an eloquent turn on sequence, the module fault analysis and display triggering, set and re-set switching, remote control interfaces, system protection, and centralized control for the modules in the transmitter. The Control Board also contains the forward and reflected power metering calibration circuits. It is important to note that all of the modules in the transmitter are in some way interfaced to the control board through one of the 12 connectors located on the board.

There are eighteen total logic gates (AND gates) which jointly monitor 52 logic points to form the decision tree which controls the transmitter’s power up switching, fault sensing, fault protection and display, and the associated fault reset switching.

The transmitter’s power amplifiers are monitored through the logic lines associated with pins 1-13 of connectors J1 and J2. Connector J1 provides connections to the first four amplifiers and J2 connects to the second four amplifier modules (if so installed). The logic circuits following the inputs from the two connectors are identical, so only the J1 input circuits are described herein.

The first four pins of each connector (pins 1-4) are the -12 volt supply status lines.

These lines are held to ground during the power up sequence until the amplifier -5 volt bias voltage is present, and then they are switched open by the amplifier modules; they are also open if no amplifier is present. Following the status inputs from J1 pins 1-4, they feed a four input AND gate U1A. When the status input lines are open, they are held high by the pull-up resistors R1-R4. If all the inputs to U1A are high, the U1A output is high, which in turn puts a high on the input of the two input AND gate U3A, the other U3A input comes through the same circuitry from J2 .

If both U3A inputs are high, the U3A output is also high.

The output of U3A feeds one input of AND gate U3D. The other input of U3D comes through the gate of U3C from the 1 st Converter and Output converter monitor outputs J5-2 and J6-2, and the -12 volt monitor circuit formed around Q3 and Q4. If the local oscillators of the up-converters are operating normally (in lock), a ground on the gates of Q1 and Q2 will be present which turns off Q1 and Q2 and puts highs on the inputs of gate U3B which places a high on the input of U3C. The high on the

U3B output also feeds the LO lock LED on the display board through J10 pin 8, and also the remote status/control output on J11 pin 8. The other input side of U3C comes from the -12 volt monitor circuit. If the -12 volt supply is operating normally, it forward biases the gate-source junction of Q4, turning it on, which causes a low on the gate and a high on the drain of Q3 and a subsequent high on the input of U3C





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HSD SERIES OPERATION AND MAINTENANCE which causes the output of U3C to go high placing a high on the input of U3D. Since both U3D inputs are high, the U3D output is high. The U3D output feeds one input of AND gate U4C, the other U4C input comes from the flip-flop latch U7A which is controlled by the temperature status circuitry. If the temperature status is normal both U4C inputs will now be high as well as the U4C output.

The temperature status inputs to the board are found on J1 and J2 pins 5-8. These inputs come from the Power Amplifier modules and have the same logic as the -12 volt status lines, open is good and ground is fault. If the status of the amplifier modules is good, or the modules are not installed, all of the inputs to U1B and U5B will be held high by the associated pull-up resistors. This constitutes a high on the

U1B and U5B outputs and the output of the following U4D gate. With the U4D output high, this forces the drain of Q7 low, which connects to the pin 3 clock input of U7A latch. When power first comes on the latch is set with a high on pin 5 and a low on pin 6. If a temperature fault occurs, and a resultant low occurs on any gate input of U1B or U5B, this will put a low on the gates of U4D and Q7. When the gate of Q7 goes low (shuts off) it puts a high on the drain which triggers the clock input to the latch. When the latch toggles, U7B pin 5 goes low and pin 6 goes high. U7A is latched in this state until a reset is received through a fresh system power up or until the Temperature Reset pushbutton S1 is depressed. Note that there is no automatic reset for an over-temperature fault, a manual reset using the reset switch or a power cycle of the main power switch is necessary to reset the fault circuit; this prevents damage to the amplifiers from an over temperature situation that has not been corrected.

The U8A gate inputs have the logic input from the status circuits described above

AND the logic output from the VSWR fault circuit latch. The VSWR fault circuit uses a similar latch circuit formed by the circuitry around U7A. The primary difference is that this circuit provides for a remote control reset of the VSWR overload circuit which comes in on pin 11 of J11. The J11-11 input feeds one input of AND gate

U9C, the other input is the VSWR reset switch S2 located on the Control Board.

When the output of the VSWR latch switch U7B is high to input 2 of gate U8A, AND the output of the previous circuits is also high on input 1, U8A outputs a high to input

1 of gate U9A. The other input to U9A is the Operate/Standby switching circuits at the inputs to gate U9D.

The gate U9D inputs come from the front panel Operate/Standby switch through J10 pin 12, and the Remote Control board through J11 pin 12. These inputs are normally held high by pull up resistors R42 and R43, unless either Standby/Operate switch is grounded. This holds the U9D output high. Then, if both inputs of U9A are high, this puts a high on the U9A output which turns on the drive on the IF board through J9-5 and also feeds through J10-6 to the LED on the Display Board; it also signals the Remote Control board through J11-10. In addition, this output connects to the main +12 volt power supply turn-on circuit composed of Q11 and Q12. This high output is connected through J3 pin 5 to the power supply sub-chassis back





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HSD SERIES OPERATION AND MAINTENANCE plane data connector.

The amplifier fault circuits are the same for amplifier fault inputs on J1 pins 10-13 and J2 pins 10-13. The incoming fault lines are normally open from the amplifier module logic output and pulled high by the corresponding pull up resistors. The resulting highs on the four AND gate inputs of U2B and U6B will force a high on the gate outputs which feed the gate inputs of U8D, holding its output high. Conversely, if any of the fault line inputs from J1 or J2 go to ground, caused by an amplifier fault, the corresponding fault LED will illuminate (conduct) and cause a resultant low at the gate output of U8D. U8D feeds one of the fault switch (gate) inputs of U8C; the other U8C input comes from the fault monitor circuit for the Driver Amplifier.

The Driver Amplifier fault circuit is fed by J7 pin 3 through to the gate of Q5. The J7-

3 input line and the Q5 gate are low in a no-fault condition. When the input line goes high in a fault condition, the drain of Q5 goes low causing the DS5 fault LED to illuminate, and places a low on the input of U8C, causing a low on U8C’s output.

This turns off Q8 by bringing the drain of Q8 high and causing the Display Board fault LED to illuminate; it also signals the remote control board that an amplifier fault has occurred. The Display Board output is found on J10-11 and the remote control output is found on J11-5.

The input to Q6 is the 10MHz reference monitor logic input. If an external reference signal of sufficient level is present at the 10 MHz Reference Module input, the module outputs a ground on J8 pin 2 and the connection to the gate of Q6. This forces the drain of Q6 to go high which illuminates the Display Board external reference LED through J10-7 and signals the remote control board though J11-9.

The Control Board metering circuits are fed by J3 pins 1 and 2 which come from the metering detector module. The detected forward input is J3-1 and the detected reflected input is on J3-2. The inputs feed through the calibration potentiometers

R48 and R49 to buffer amplifiers U13A and U13B which have a maximum voltage gain of 3V/V. The amplifier gains are adjusted by the calibration potentiometers.

Each amplifier output is split and feeds to two circuits. One amplifier output feeds an analog multiplier which serves to square the voltage output of the amplifier (voltage squared=power) which linearizes the metering outputs. The metering outputs are present on J10 pins 13 and 14 which are routed to the Display Board metering circuit, and J11 pins 2 and 3 which go to the remote control board. R48 and R49 are used to calibrate the front panel meter readings to measurements made with calibrated test equipment.

The other amplifier outputs connect to comparator U10B. The U13B (forward power voltage) output feeds one input of U10B through a voltage divider which sets the threshold for the VSWR overload comparison. Amplifier U13A (reflected power voltage) feeds the other side of the comparator. When the voltage of U13A is more than one half of the voltage from U13B (VSWR=3:1), the output of the U10B comparator will go high which triggers the U7B VSWR overload latch. The U7B





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VSWR overload latch circuit, as was described above, may be reset by depressing switch S2 or by a command from the remote control board.

The Control Board uses +5 volt regulator U14 to provide a stable voltage supply to the circuits on the Control board and to the Display Board.

J12 provides 12VDC for the cooling fans in the up-converter.

Finally, the J4 connector provides an interface to the up-converter power supply providing +/- 12VDC. The -12 volt input from the up-converter power supply on J4 pins 3 and 4 is bussed out to the power amplifier modules on J1 pins 14-17 and J2 pins 14-17. The -12 volt is also fed through J10-1 to the metering circuit on the

Display Board, through J9-9 to the 1 st IF module, through J11-13 to the Remote

Control board, and through J7-2 to the Driver Amplifier. The +12 Volt input provides all of the positive voltage requirements for the up-converter.

3.7 Display Board:

P/N 50527000

Schematic Diagram 50527002A, D1PC1

The Display Board contains the LED status indicators, the meter display circuit, and the switches for Operate/Standby and AGC. Status inputs from the control board are connected thru J1 pins 7-12 to the LED circuits. J1 also connects the switches out to the control board.

The Operate/Standby indicator (DS4), a bi-color LED, works as follows. When the unit is in Standby mode, there is a low (coming from the control board) on the gate of Q4, making the drain high (open) thereby causing both the red and green LED segments of DR4 to turn on which causes the LED to glow yellow. When the Q4 control board input goes high in Operate mode this causes a low on the drain of switching FET Q4 turning off the red segment of DS4, resulting in a green indication for the Operate mode.

The circuits for DS1, DS2, DS3, DS5, DS6, and DS7 are the same. When the control board input status is high this causes a high on the gate of the associated active device for the display LED. This in turn causes the drain of the device to go low, grounding the cathode of the LED and turning the LED on.

There are two switch circuits on the display board. Switch S1 controls the AGC on/off function, and toggles to ground for AGC on. The second switch (S2) controls the Operate/Standby function and this switch toggles to ground for Standby. The switch outputs are connected through J1 pins 13 and 14 back to the control board.

Both switches are the push/push type.





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The metering circuit provides a blue LED illumination which corresponds to the selected metering display and is controlled by momentary push button switch S3.

Each time the switch is depressed, it increments through the measurement functions of Forward Power, Reflected Power, +12Volt Supply, and -12V Supply. Forward

Power is the default power up measurement.

The meter display incrementing circuit is controlled by retriggerable multivibrator U3 which acts as a one shot device with an automatic reset. Each time switch S3 is depressed, U3 generates a 500ms clock pulse at its output pin 6 which is bussed to the input of each of the flip flop circuits.

U4 and U5 are dual flip-flop devices with set and reset, and are configured to act as a four section shift register. On power up, the default state has the gate of Q11 high and the gates of Q8-Q10 low. When the gate of Q11 is high, this forces the drain of

Q11 low and turns on the Forward Power LED and at the same time puts a high on the control lead of switch 4 of U2. U2 is a four section analog switch which provides a switch connection when the logic on the control line goes from low to high. When the switch is activated, the “D” side is connected to the “S” side of the switch. All of the “S” side connections of the four switches are bussed together to feed the output to the meter at J2 pin 7.

Hence, when a clock pulse is received from U3, all of the flip flops transfer the logic level on the “D” inputs to the “Q” outputs. This then toggles the gate state of Q11-Q8 and the state of the associated analog switch. Each in turn, the display LEDs illuminate and the appropriate metering source voltage is selected and fed thru the associated switch to the output at J2 pin 7.

The resistor networks R16-R18 and R19-R21 scale the power supply voltages to be used in the metering circuit , R17 and R20 are used to calibrate the +12V and -12V meter readings.

The Display Board also contains a +5 volt regulator U1 which provides a stable voltage source for the Display Board circuits.





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3.8 Driver Amplifier Module:

P/N 50524000

Schematic Diagram, 50524002A, D1A4

Gain (J1-J2)

Drain of Q1

Drain of Q2 and Q3

+34dB Typical

10.2Vdc @ 360mAdc

10Vdc @ 1.3Adc

Digital Mode:

RF Input (J1)

RF OUTPUT (J2)

Analog Mode:


Aural IF Input (J1)

VISUAL RF OUTPUT (J2)

AURAL RF OUTPUT (J2)

0dBm Average Power

≈ 34dBm Average Power

≈ +6dBm peak

≈ -7dBm average

≈ +40dBm

≈ +27dBm

The HSD driver amplifier is located in the up-converter drawer. The module provides and end-to-end gain of 33dB and operates class A. The input level to the module at J2 is 0dBm average power. The first stage of gain is provided by U1 which has a gain of 13dB and is biased with 9 volts at 200ma. The U1 output is coupled to the second gain stage Q1 through a microstrip network. Q1 has a variable bias circuit adjusted by R20. The bias adjustment is necessary to compensate for bias for different devices, and must be re-adjusted if the replacement of Q1 is required. R20 is adjusted for a voltage of 1.8V measured across R17 and R18, which creates a nominal drain bias of 10.2 volts at 360ma.

The gain of the Q1 circuit is 11dB. R1 provides gate current limiting and low frequency stability.

The Q1 output is connected to the 90 degree hybrid splitter CP1 through a printed micro strip line. The splitter exhibits a throughput loss of 3dB. The network of R5,

R6, and R7 provide a 50 ohm match for the isolation port of the splitter. The two outputs of CP1 are equal in amplitude but 90 degrees out of phase. The two outputs feed the circuits of Q2 and Q3 which are identical. The gate bias circuits of Q2 and

Q3 are adjusted by potentiometers R2 and R9 respectively which adjust the drain currents of Q2 and Q3. To set the correct drain current for Q3, adjust R9 to set the voltage drop across R12 at 1.95 volts. This sets a drain current of 1.3 amps and a drain voltage of 10 volts. To set the drain current of Q2, use potentiometer R3 and set the voltage drop across R11 in the same way.

The outputs of the Q2 and Q3 circuits are then combined in phase by coupler CP2





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HSD SERIES OPERATION AND MAINTENANCE which exhibits a 0.25dB loss. The gain of the circuits between CP1 and CP2 is a nominal 9dB. The isolated output (J3) of coupler CP2 is loaded with an external 50 ohm load, and the output side of the coupler connects to the RF output of the upconverter drawer through J4.

The network of diodes CR1-CR4 forms an OR gate detector which drives the fault monitor circuit around U2. If one of the amplifier circuits fails to draw sufficient current so that the voltage at pin 7 of comparator U2 exceeds the reference voltage of 10.6 volts on pin 6, the U2 output on pin 1 will go high, triggering the fault monitor circuit on the control board.

The voltage regulator U3 provides a stable -5 volts for gate bias circuits of Q1, Q2, and Q3

3.9 Remote Control/Status Board:

P/N TBD, D1PC3

Schematic Diagram, Available Q2, 2007

The optional Control/Status board provides various monitoring and control functions for the transmitter while displaying the results using a graphical display on a remote computer connected via the remote interface. The Remote Control/Status is field installable and can be ordered as an upgrade kit from the factory.

3.10 Up-Converter Power Supply:

P/N REL150-2004Ch-CO, OEM

No Schematic Diagram, D1PS1

The Up-Converter contains a high-efficiency switching power supply module that provides one +12V/7.5A output and one -12V/5A output. The -12V output is used to provide -12V bias for the power amplifier modules. The +12V output is routed to various modules in the transmitter.

The input voltage range of the power supply system is 85 to 264 VAC. The allowable input frequency range is 47 to 63 Hz. The maximum peak inrush current to the module is 40A. The power supply module has a typical efficiency of 82% with a power factor of 0.95 (Full Power, 230V), and is rated at 150 watts output power.

There is no field service information available for the power supply modules. If a module fails, remove it from the transmitter and return it to the EMCEE factory for repair or replacement.





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3.11 Main Chassis:

Interconnection Diagram 50500000 A1

The main chassis contains the +12V power supply sub-chassis and its associated

Power Supply modules. The power supply sub-chassis provides space for six power supply modules. The Power Amplifier sub-chassis provides space for up to eight Power Amplifier modules. The main chassis contains several other modules utilized to split, combine, and measure power; and also contains the AC main power distribution, and the interconnection cabling which connect the sub-assemblies together. The following block diagram is presented to provide an overview of the main chassis.

3.11.1

Main Chassis Block Diagram

The following block diagram depicts the primary interconnections and signal flow in the main chassis. The theory of operation of each of the modules in the main chassis is explained below.





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3.12 +12 Volt Power Supply System

P/N 001-4237-0007

No Schematic Diagram, PS1

The individual +12V switching power supply modules install into the power supply sub-chassis backplane through a push-in connector. Each power supply backplane is configured to accept three power supply modules. The transmitter may be configured for redundant power supply operation by simply plugging an extra supply/s into the backplane. The power supply system is field upgradeable. Up to three power supply modules may be installed without other chassis upgrades.

Power supply modules may be “hot-swapped”. Each power supply module is rated for 800 watts and will support two Power Amplifier modules. The module provides a

2% regulation of the rated voltage output of +12vDC. The input voltage range is

85-264VAC, and the operating peak-peak 2 ripple and noise rating for the supply module is 1%. The modules are auto-recovering from an overload situation.

Each power supply has two front panel LEDs. The left LED indicates the presence of AC main power input and the right LED indicates +12Vdc output. The power supply turn on is controlled by the logic ladder in the Control Board, and as such the supplies are idle until called for by the control logic.

The power supply modules are an OEM part; therefore there is no field service data available. In the event of a power supply module failure, return the defective unit to

EMCEE for repair or replacement.

3.13 Power Divider Module

P/N 50511000 Schematic Diagram N/A, DC1

The power divider module is an 8-way multi-port divider network which exhibits 9.5 dB of insertion loss. In the HSD2500A the power divider is configured with two active output ports. The power divider is designed so that it may be upgraded to feed additional Power Amplifier modules without requiring realignment of the Up-

Converter. Each Power Divider output port feeds one Power Amplifier module input.

The power divider module has no field serviceable parts. If a failure of the module occurs, return the module to EMCEE for repair or replacement.





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3.14 12.5 WATT AMPLIFIER:

P/N 50531000

Schematic Diagram 50531002A, A1PA (S-Band)

Interconnection Diagram 50000002, A2/A3

Power Output (J2)

Drain of Q1 & Q2

Drains of Q3, Q4, Q5

≈ 42dBm Typical

10.0Vdc

@

10.25Vdc

1.3Adc

@ 7.0Adc

The 12.5 Watt S-Band Amplifier module provides an end-to-end gain of 20dB. The module contains two amplifier sections; the first section is a 9dB gain distributed matching element amplifier running class A, and the second section is an 11dB gain distributed matching and lumped element amplifier also running class A.

The module input at J1 comes from the Output Converter module at a level of

150mW ( ≈ 22dBm) average power. The J1 input signal line is connected to the 90 degree hybrid splitter CP1 through a printed micro strip line. The splitter exhibits a throughput loss of 3dB. The network of R1-R4 provides a 50 ohm match for the isolation port of the splitter. The two outputs of CP1 are equal in amplitude but 90 degrees out of phase. The two splitter outputs feed the circuits of Q1 and Q2 which are identical. The gate bias circuits of Q1 and Q2 are adjusted by potentiometers

R7 and R9 respectively which adjust the drain currents of Q1 and Q2. To set the correct drain current for Q1, adjust R7 to set the voltage drop across R37 at 1.95 volts. This sets a drain current of 1.3 amps and a drain voltage of 10 volts. To set the drain current of Q2, use potentiometer R9 and set the voltage drop across R38 in the same way.

The outputs of the Q1 and Q1 circuits are then combined in phase by coupler CP2 which exhibits a 0.25dB loss. The gain of the circuits between CP1 and CP2 is a nominal 9dB. The isolated output (J3) of coupler CP2 is loaded by 50 ohm load

R11, and the output side of the coupler connects to the RF input of a three way micro strip splitter which feeds three identical push-pull FET amplifier circuits.

Each power FET circuit is fed by a 50 ohm balun (CP3-CP5) which receives the unbalanced 50 ohm input and converts it to a 50 ohm balanced output with each leg being 180° out of phase. This balanced output drives the dual FET amplifier which operates as a push-pull amplifier. The gates of Q3 are biased through R14 and R15 by the bias circuit formed around op amp buffer U2. The U2 buffer amplifier has a gain of 1v/v. The current for the drains of Q3 is set by potentiometer R26. To set the drain currents for Q3, use potentiometer R26 and set the voltage drop across

R43 at 1.75 volts. This sets an equal gate current of 3.5Adc for each side of the dual power FET and a gate voltage of between -.8 and -1 volt. All three dual power





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FETs are biased in the same manner. The individual outputs of the dual power

FETs are fed through baluns T1-T3, which provide unbalanced 50 ohm outputs, and are then coupled together through a micro strip combiner which feeds the amplifier module RF output at J2. The J2 output level is typically 15 watts average power

(41.76dBm).

S1 is a thermostat mounted to the PCB surface and provides thermal protection for the amplifier module. When the S1 mounting surface exceeds 85°C, the thermostat contacts close to provide a ground, indicating an over temperature fault condition.

This signals the control board through the J3-3 output that a temperature fault condition has occurred. Conversely, if the surface temperature is below 85°C, the

S1 output is open.

The amplifier drain fault circuit is comprised of the circuits around comparator U6. As long as the amplifier devices are drawing current and the drain voltages are below

11V, U6 provides an open output. U6 compares the drain voltages through CR1-

CR5 against an 11 volt reference. If the amplifier circuit ceases drawing current, the drain voltage will increase to 12 volts and comparator U6 will provide a ground indicating an amplifier fault. The U6 output is connected through J3-5 to the control board.

J3-4 is the -5 volt status output line. It is imperative that the +12 volt supply does not turn on until the gate bias is present. This is to prevent damage to the power devices due to excess current draw through the power devices caused by zero gate bias. If the 12 volt supply comes on and no -5 volt gate bias is present it causes a high on the gate of Q7 which turns Q7 on and grounds the drain which signals the control board that the -5 volt supply has failed. The control board then shuts down the 12 volt supply input. If the -5 volt bias is present, this turns on Q6 which holds the gate of Q7 low which prevents turn on of Q7 and allows the 12 volt supply to come on.

U5 and U7 are the -5 and +5 volt regulators which provide a stable voltage for the amplifier bias circuits for Q1 and Q2 and the supply voltages for buffer amplifiers U2-

U4.

3.15 Amplifier Combiner Module:

P/N 50512000

Schematic Diagram N/A, A4

The power combiner module is a 2-way Wilkinson multi-port combiner network which exhibits <.25 dB of insertion loss. The power combiner is configured with two active input ports. Each input port is fed from one Power Amplifier module. The output of the combiner feeds the input of the metering coupler.





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The Power Combiner Module has no field serviceable parts. If a failure of the module occurs, return the module to EMCEE for repair or replacement.

3.16 Metering Coupler:

P/N CM440159

Schematic Diagram N/A, DC2

Insertion Loss

FWD Coupling

REF Coupling

<0.2dB

-40dB

-40dB

The Metering Coupler CP1 is a four-port circuit that performs two functions. The first function is to pass the combined visual and aural carriers (or digital carrier) with minimal insertion loss. These carriers are then applied to the transmitter’s RF output connector port. The second function of the coupler is to provide a sample of the RF signals which are used by the Metering Detector. These RF signals include a sample of the forward power from the final amplifier and reflected power returned from the output connector.

There is no field repair for the metering coupler. In the event of a failure, return the unit to the factory for repair or replacement.

3.17 Metering Detector:

Schematic Diagram 30400038, A5

The Metering Detector contains two identical circuits for monitoring forward and reflected output power while providing dc voltages proportional to those signal levels. A sample of the output signal from the Metering Coupler (A1CP1) is supplied to the forward port FWD PWR Sample input (J1) of the detector. This signal is passed through resistive attenuator R1/R2/R3 and coupling capacitor C1 to integrated circuit U1, an RMS detector. At pin 7, U1 outputs the video component of the UHF visual carrier while C3 rolls off the aural energy contained in the signal. The amplitude of the video is then doubled using op-amp U2 and sent to peak detector CR1 via pins 1 and 2 of jumper JP1. (Pins 2 and 3 of JP1 are utilized for average digital power detection only.) Capacitor C4 and resistor R7 filter the peak video component from diode CR1 and this dc voltage is sent to unity gain buffer amplifier U2. The dc level at the output of U2 (pin 7), which is now proportional to the peak power of the visual signal entering the Metering Detector,





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HSD SERIES OPERATION AND MAINTENANCE will be approximately +3V. This voltage will be delivered to the Display Board RF

Power Meter after processing on the Control Board.

Metering calibrations for the detected voltages developed by this module are adjusted by potentiometers located on the Control Board, see Section 3.6.





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4 REMOTE STATUS/CONTROL SOFTWARE

Included in Manual Revision 2.x, Q2 2007





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5 MAINTENANCE

5.1 Periodic Maintenance Schedule:

OPERATION

OUTPUT POWER CALIBRATION

RECOMMENDATION

Upon installation and at one-year intervals thereafter (see section 5.6).

Inspect every year and clean when necessary. No lubrication needed.

FANS

5.2 Recommended Test Equipment:

EQUIPMENT

Digital Multimeter

Oscilloscope

VHF Sweep Generator

50 Ohm RF Detector

20dB Attenuator

20dB Directional Coupler

50 Ohm, 500W Dummy Load (2)

Power Meter

Frequency Counter

Spectrum Analyzer

NTSC Video Generator

Digital Signal Generator

Miscellaneous test cables and connectors

MANUFACTURER

HEWLETT PACKARD

TEKTRONIX

WAVETEK

TELONIC BERKELEY

NARDA

NARDA

BIRD

HEWLETT PACKARD

HEWLETT PACKARD

HEWLETT PACKARD

TEKTRONIX

Agilent

MODEL #

E2378A

2232

2001

8553

766-20

3001-20

8833

435B

5386A

8594E

TSG100

E4436B





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5.3 Troubleshooting:

If the visual and/or aural output signals from the transmitter appear distorted, noisy or nonexistent, consider the following procedure as a troubleshooting aid. This procedure assumes the transmitter wiring as well as the cabling and connectors are trouble free. It also assumes the modulator is receiving clean baseband video and audio signals (or error free data input) while providing the required visual and aural IF carrier levels (or digital input level). The general problem area will be indicated by simply checking the diagnostic indications from the front panel display and the fault LEDs on the control board (see manual Section 3.6).

5.4 Front Panel Indicators:

1. Under normal operation (transmitter on) the front panel LED and meter indicators will show the following indications. o

Operate- o

LO Lock- ON o

IF Input- ON o

Output Lock- ON o

External 10 MHz- ON (if external reference is used) o

VSWR Overload- OFF o

Amplifier Fault- OFF o

Temperature Fault- OFF

The transmitter meter will have the following display: o

+12 Volt Supply- IN RANGE o

-12 Volt Supply- IN RANGE o

Forward Power Meter- ≈ 100% o

Reflected Power Meter- 0-10%

2. Under Standby conditions (transmitter off), switched +12 volt power is off.

Unless the transmitter is in the standby mode due to a VSWR overload, the

VSWR OVLD indicator is OFF.

3. Any indicator, which is not in range of the normal operational display value range, signifies a transmitter malfunction. If the operator has the appropriate technical experience to locate the malfunction, repairs to the transmitter may be made by replacing or repairing the defective transmitter module.





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4. If the VSWR OVLD indicator has turned ON, the transmitter is in a standby mode due to the operation of the protection circuits. Under this condition, the cause of the VSWR problem at the transmitter's output must be cleared before activating the VSWR OVLD RESET switch on the Control Board to reactivate the transmitter.

5. IF INPUT and LO LOCK indicators will turn OFF under one of five conditions:

Video is not applied to the modulator, the transmitter Operate/Standby switch is in the Standby position, an overheat condition exists in the Final Amplifier

Assembly, the transmitter is in VSWR overload as discussed previously, or one of the Up-Converter Drawer modules has failed. Correct these five conditions as required to return the transmitter to operation.

5.5 HSD-2500 TROUBLESHOOTING CHART

The following chart is meant as an aid to uncovering faults that have developed in the HSD transmitter. During normal operation, all indicators on the graphical control interface should show their normal operation status as listed above. The troubleshooting chart lists the indicators that are not in their normal state. When a problem develops with the transmitter, note the corresponding display status states and compare these to the chart.

HSD-2500 TROUBLESHOOTING CHART

PROBLEM

NO OUTPUT

POWER

INDICATORS

LED INDICATES FAULT

IF INPUT LED

EXTINGUISHED

12 VOLT SUPPY CIRCUIT

SHOWS NO OUTPUT AND

TRANSMITTER HAS NO

OUTPUT.

+12V Power Supply

Failure

CAUSE

Modulator Failure

Modulator is not connected or is connected with a faulty cable/s.

Check inputs.

STANDBY/OPERATE switch in STANDBY on the front panel display or remote control.

SOLUTION

Check +12V Power

Supply module or

Power Supply Cable.

Replace cable if defective.

Check modulator and replace if faulty.

Check cabling and replace cable if necessary.

Place switch to ON.





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PROBLEM

NO OUTPUT

POWER

LOW OR

DISTORTED

OUTPUT

SIGNAL

INDICATORS

ARE ON. ON/OFF

INDICATOR IS ON.

+12 VOLT SUPPLY CIRCUIT

HAS OUTPUT BUT NO FINAL

RF DRIVE. IF LOCK and/or LO

LOCK INDICATORS ARE

OFF.ON/OFF INDICATOR IS

ON.



RF DRIVE. IF LOCK and/or

OUTPUT LOCK INDICATORS

MODULATOR IS ON. TEMP.

FAULT INDICATOR IS ON.



RF DRIVE. IF LOCK AND/OR

OUTPUT LOCK INDICATORS

ARE ON. ON/OFF

INDICATOR IS ON.

MODULATOR IS ON. VSWR

OVLD. INDICATOR IS ON.

OUTPUT POWER LOW, ALL

OTHER INDICATIONS OK.

NO FAULT IS INDICATED

CAUSE

No Video going into the modulator

Up-Converter power supply failure.

IF/Up-Converter Failure

Reference Oscillator

Failure

Final Amplifier

Assembly is overheated.

VSWR Overload condition

SOLUTION

Check Video and

Audio inputs to modulator.

Check output of the power supply using the meter. Replace

P/S if defective.

Check IF and Up-

Converter modules outputs for correct level and frequency.

Replace if defective.

Check for correct level and frequency.

Replace if faulty.

Check cooling fans to make sure they are operational. Make sure the ambient temperature is within the specified range.

If the problem persists, replace the

Final Amplifier.

Check Combiner, TX

Line and Antenna for

VSWR. Repair or replace faulty component before placing transmitter back on the air.

Failed Driver Amplifier,

Failed Final Amplifier

Output Power

Calibration is incorrect

Replace malfunctioning module.

See Section 5.6.





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PROBLEM

LOW OR

DISTORTED

OUTPUT

SIGNAL

TRANSMITTER

NOT ON

CORRECT

CHANNEL

INDICATORS

OPERATE INDICATOR IS OFF

OUTPUT POWER IS ZERO

LO LOCK INDICATOR IS OFF

CAUSE

IF Module is adjusted incorrectly

Modulator Malfunction

Operate(ON)/Standby(

OFF) switch is on OFF

Failed Final Amplifier

Module

Failed 1 st

Converter

LO LOCK INDICATOR IS OFF Failed Output

Converter

Invalid channel has been selected.

SOLUTION

See Section 3.3.

Replace modulator.

Place switch to

Operate.

Replace defective module.

Check Reference

Oscillator for correct level and output frequency (10MHz).

Check 1 st

Converter for correct frequency and output. Replace if faulty.

Check Converter for correct output level and frequency.

Replace if defective.

Check channel selected against the channel chart.

Reselect a valid channel.

5.6 Output Power Calibration:

The power calibration circuits are located on the Control Board (R48 and R49). To insure correct transmission parameters, the output power level and % POWER meter calibration of the transmitter should be checked at least once every year.

The % POWER meter has been factory calibrated for 100% with the transmitter providing 100W peak visual (25 watts average power). The following calibration procedure assumes that the composite signal from the transmitter has the aural carrier 13dB below the visual with the visual carrier consisting of 87.5% video modulation and 0% average picture level (APL).





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NOTE: In the following steps, the power levels stated are those expected at the output of the transmitter. Therefore, when measuring these power levels, be sure to take into account any attenuation factor provided by the directional coupler and the attenuators used in your test set-up.

R48

Reflected Power

Calibration Control

R49

Forward Power

Calibration Control

HSD Control Board P/N 50528000

5.6.1 Forward Power Calibration:

1. With the OPERATE/STANDBY switch to STANDBY, connect the test equipment and termination circuit to the transmitter output. Set the transmitter for the desired output channel frequency.

2. Connect the desired test signal to the input of the modulator. Be the modulator's power is ON and verify that it provides 87.5% video modulation.

Place the transmitter’s POWER switch to ON, its OPERATE/STANDBY switch to OPERATE, its HIGH/LOW switch to HIGH, and turn the Aural

Carrier control fully counterclockwise to disable the aural carrier on the modulator.

3. To set the transmitter's high output power, adjust the POWER ADJUST control for a (external) power meter reading of 100W (50dBmw) (25 watts average). (Note that 100W peak visual with 0% APL and 87.5% video modulation is equal to 59.6W average visual.)





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4. With the external power meter reading 59.6W, observe the OUTPUT power meter on the front panel display and check for a 100% indication. If this reading is not obtained, adjust potentiometer R49 of the Control Board for a

100% indication.

5. Place the AGC switch to ON and verify that the % POWER meter still reads

100%. If necessary, vary the AGC ADJ control for a 100% indication.

6. Using the spectrum analyzer, set the aural carrier level, using the aural carrier level adjust on the modulator, to the desired level (-13~-18dB) below the visual carrier. (See Note 1)

5.6.2

Reflected Power Calibration:

7.

Disable the Aural carrier by turning the Aural Carrier Adjust fully counterclockwise on the modulator and place the ON/OFF control to OFF.

8. Reverse the connections on the sample ports of the Metering Coupler; this creates a 1:1 VSWR. The Metering Detector's reflected power circuit will now detect the transmitter's reflected power, simulating a 1:1 VSWR mismatch

(100% returned power), at the transmitter's output.

9. Place the ON/OFF control to ON. Check the REFLECTED % POWER meter for a 100% indication. If this reading is not obtained, adjust the Reflected

Power calibration potentiometer R48 on the Control Board for the correct indication. (See Note 2)

10. Place the ON/OFF control to OFF. Re-reverse the connections on the sample ports of the Metering Coupler.

11. Disconnect the test equipment and reconnect the source and transmission lines to the transmitter. Place the ON/OFF control to ON (Operate).

Note1-

The detector circuit will be affected by the aural carrier. When the aural carrier is increased, the AGC circuit will reduce the output power to maintain a constant detected voltage which will reduce the visual carrier power below

100W if the aural carrier power is excluded from the power calibration.

Note 2-

The reflected power calibration must be done in AGC OFF setting, because the AGC circuitry performs the power limiting function. The detector circuit is insensitive to changes in APL; hence the meter will not change by changing

APL.





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5.7 Pre-Corrector Adjustment:

Use the pre-corrector circuit to adjust the transmitter output for minimum spectral regrowth. The pre-corrector circuit is located on the 1 st IF Board which is contained in the Up-Converter Drawer. Use the potentiometers, R18 to adjust the slope, and

R58 to adjust the threshold of the pre-corrector circuit.

Connect a spectrum analyzer (using the proper directional coupler and attenuators) to the transmitter’s RF output connector. Set the spectrum analyzer for the correct frequency, and 3 MHz span at 100 kHz RBW with the averaging off. Set the reference level of the spectrum analyzer to display the visual average of the peaks of the digital signal. Add an additional 10dB pad to the analyzer input, and then reset the analyzer span to 20 MHz.

Alternatively adjust the two potentiometers to establish a spectral re-growth which is

-40dB from the average of the peak digital signal at ±3 MHz from the center of the channel.

R18

SLOPE

ADJUST

R58

THRESHOLD

ADJUST

HSD 1st IF Board P/N 50521000





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5.8 FREQUENCY PROGRAMMING:

The LO frequency of the Output Converter is calculated by subtracting 374 MHz from the desired transmitter output frequency. The LO frequency (F O ) is tunable in 1 MHz steps. The LO circuit has an adjustment range of 194 MHz between 2125 MHz and

2321 MHz. Use the switches S3, S2, and S1 to set the 100 MHz, 10 MHz, and 1 MHz steps respectively to transmit on the desired output frequency.

To adjust the transmitter output frequency, slide out the Up-Converter Drawer and remove the lid by loosening the four fasteners. Remove the screws retaining the cover to the Output Converter Module. Adjust the three 10 position rotary switches for the desired frequency. Use the pictorial below as an aid for adjusting the frequency programming switches.

The charts in Sections 5.7.1 and 5.7.2 contain the switch mapping for the FCC standard transmit frequencies. For international (export) use outside of the United States, use the published channel plan for the applicable country.

Switch S1

Tunes 1 MHz

F O Increment

Tunes 10 MHz

F

Switch S2

O Increment

Tunes 100 MHz

F O

Switch S3

Increment

HSD Output Converter Module P/N 50523000





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5.8.1 ITFS/MMDS Channel Programming:

The following chart has been prepared for your convenience to set up the standard

ITFS/MMDS channel frequencies. Set the LO frequency with the switches as indicated in the chart to transmit on the desired ITFS/MMDS channel.

Channel ITFS/MMDS

Number

Center Visual Aural

Switch

Configurations

Channel

Designator Frequency Carrier Carrier S3 S2 S1

LO

Frequency

22

23

24

25

18

19

20

21

14

15

16

17

10

11

12

13

26

27

28

29

30

31

1

6

7

8

9

2

3

4

5

2605

2611

2617

2623

2629

2635

2641

2647

2557

2563

2569

2575

2581

2587

2593

2599

2503

2509

2515

2521

2527

2533

2539

2545

2551

2653

2659

2665

2671

2677

2683

ITFS A1

B1

A2

B2

A3

B3

A4

B4

C1

D1

C2

D2

C3

D3

C4

D4

MMDS E1

F1

E2

F2

E3

F3

E4

F4

ITFS G1

MMDS H1

ITFS G2

MMDS H2

ITFS G3

MMDS H3

ITFS G4

2501.25 2505.75 1

2507.25 2511.75 1

2513.25 2517.75 1

2519.25 2523.75 1

2525.25 2529.75 1

2531.25 2535.75 1

2537.25 2541.75 1

2543.25 2547.75 1

2549.25 2553.75 1

2555.25 2559.75 1

2561.25 2565.75 1

2567.25 2571.75 1

2573.25 2577.75 2

2579.25 2583.75 2

2585.25 2589.75 2

2591.25 2595.75 2

2597.25 2601.75 2

2603.25 2607.75 2

2609.25 2613.75 2

2615.25 2619.75 2

2621.25 2625.75 2

2627.25 2631.75 2

2633.25 2637.75 2

2639.25 2643.75 2

2645.25 2649.75 2

2651.25 2655.75 2

2657.25 2661.75 2

2663.25 2667.75 2

2669.25 2673.75 2

2675.25 2679.75 3

2681.25 2685.75 3

5

1

7

3

1

7

3

9

7

3

9

5

3

9

5

1

9

5

1

7

3

9

9

9

5

1

7

5

1

7

3

5

6

6

7

3

3

4

4

0

1

1

2

8

8

9

0

7

8

9

9

0

0

2

5

6

7

7

3

4

4

5

2231

2237

2243

2249

2255

2261

2267

2273

2183

2189

2195

2201

2207

2213

2219

2225

2129

2135

2141

2147

2153

2159

2165

2171

2177

2279

2285

2291

2297

2303

2309





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5.8.2 EBS/BRS Channel Programming:

The following chart has been prepared for your convenience to set up the standard

EBS/BRS channel frequencies as established in FCC Rule Part 27.5. Set the LO frequency with the switches as indicated in the chart to transmit on the desired

EBS/BRS channel.

EBS/BRS

Channel

Center Visual Aural Configurations

Designator Frequency Carrier Carrier S3

Switch

S2 S1

LO

Frequency

BRS 1

LBS A1

A2

A3

B1

B2

B3

C1

C2

C3

D1

2499

2504.75

2510.25

2515.75

2521.25

2526.75

2532.25

2537.75

2543.25

2548.75

2554.25

2497.25 2501.75 1 2 5

INADAQUATE BANDWIDTH FOR VIDEO

2125

D2 2559.75

D3 2565.25

Guard Band J 2568-2572

MBS A4 2575 2573.25 2577.75 2

B4

C4

D4

G4

2581

2587

2593

2599

2579.25 2583.75

2585.25 2589.75

2591.25 2595.75

2597.25 2601.75

2

2

2

2

0

0

1

1

2

3

3

1

7

3

9

5

1

7

F4 2605 2603.25 2607.75 2

E4 2611 2609.25 2613.75 2

Guard Band K 2614-2618

BRS 2

UBS E1

E2

E3

F1

F2

F3

H1

2621

2626.75

2632.25

2637.75

2643.25

2648.75

2654.25

2659.75

2619.25 2623.75 2 4 7

INADAQUATE BANDWIDTH FOR VIDEO

2247

2201

2207

2213

2219

2225

2231

2237

H2

H3

G1

G2

2665.25

2670.75

2676.25

2681.75

G3 2687.25





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5.9 Interpreting Amplifier Fault Indications:

The HSD Up-Converter front panel has a single LED which indicates that an amplifier fault has occurred. The HSD is configured with a Driver Amplifier and one or more 12.5 watt Power Amplifier modules. To determine which of the amplifiers has faulted, use the LED indicators located on the Control Board (in the Up-

Converter Drawer). The following pictorials show the corresponding amplifier fault

LEDs.

Front Panel

Fault

Indicator

HSD Up-Converter Front Panel

Power Amp 8

Fault Indicator

Power Amp 7

Fault Indicator

Power Amp 6

Fault Indicator

Power Amp 5

Fault Indicator

Driver Amplifier

Fault Indicator

HSD Control Board P/N 50528000

Power Amp 4

Fault Indicator

Power Amp 3

Fault Indicator

Power Amp 2

Fault Indicator

Power Amp 1

Fault Indicator





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5.10 Calibrating Voltage Indications:

To calibrate the front panel meter voltage measurements, use the trim potentiometers located on the Display Board as shown on the pictorial below. The

Display Board is located in the Up-Converter Drawer.

Connect a digital VOM between chassis ground and the +12V output of the Up-

Converter power supply. Adjust the R17 potentiometer to make the front panel meter match the measurement on the VOM. Repeat the process on the -12V supply output and adjust R20 to match the VOM measurement.

R17

+12 Volt

Calibration

R20

-12 Volt

Calibration

HSD Display Board P/N 50527000





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6 PARTS LISTS

Parts lists are provided for the following modules and assemblies and are listed in the order below. If there is a discrepancy between the part on the parts list and the part shown in the schematic diagram, the part in the diagram takes precedence.

P/N 50521000………………..1st IF Module

P/N 50523000…………..……Output Converter Module

P/N 50524000………………..Driver Amplifier Module

P/N 50525000……………….10 MHz Reference Module

P/N 50526000………………..1st Converter Module

P/N 50527000………………..Display Board

P/N 50528000………………..Control Board

P/N 50531000………………..12.5 Watt Amplifier Module

P/N 30400038………………..Metering Detector Module





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Table 1: 1 st

IF Board Parts List

HSD-2500 Transmitter P/N 50521000, 1 st

IF, Parts List, Page 1

Reference Designator

C10,C11,C12,C14,C15,

C16,C18,C19,C20,C21,

C22,C23,C24,C26,C29,

C30,C37,C38,C42,C43

CP1 LRPS-2-1 Combiner,SMT,

R20,R22 RM73B2BT 8R2 J 8.2 Ohm Resistor,SMT,1206

R21

R19

R14,R17,R28

R1,R4,R5,R9,R12,R13,R23, RM73B2BT 471 J

R26,R27

R30

R59,R62,R63

R2,R3,R10,R11,R24,R25

R49,R73

50521001

RM73B2BT 151 J

RM73B2BT 181 J

RM73B2BT 271 J

RM73B2BT 621 J

RM73B2BT 102 J

RM73B2BT 152 J

RM73B2BT 622 J

R41,R42,R44,R45,R46,R47,

R48,R50,R52,R55,R56,R57,

R66,R67,R68,R69,R71,R72,

R75,R78

R43

EMCEE Part Number

RM73B2BT 123 J

Value

150 Ohm

180 Ohm

270 Ohm

470 Ohm

620 Ohm

1K Ohm

1.5K Ohm

6.2K Ohm

10K Ohm

12K Ohm

Description

PC Board,1st IF

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Quantity/Assembly

1

27

6

1

1

1

1

1

1

1

3

9

2

1

2

4

2

26

1

3

6

1

This is an unpublished work protected by the United States copyright laws and is proprietary to EMCEE Communications. Disclosure, copying, reproduction, merger, translation, modification, enhancement or use by anyone other than authorized employees or licensees of EMCEE Communications without the prior written consent of

EMCEE Communications is strictly prohibited.



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P/N 50521000, 1st IF, Parts List, Page 2 HSD-2500 Transmitter


R38

R65,R70,R77

R54,R74

R31,R32

R36,R53

R76

R8,R16


RM73B2BT 153 J

RM73B2BT 203 J

RM73B2BT 473 J

RM73B2BT 104 J

RM73B2BT 474 J

RM73B2BT 105 J

RM73B3AT 151 J

Value

15K Ohm

20K Ohm

47K Ohm

100K Ohm

470K Ohm

1M Ohm

150 Ohm

Description

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,2512


1

3

2

2

2

1

2

Q1,Q2,Q3,Q4 IRLML2803

T1 ADT4-1WT

Transistor,HEXFET,SOT-23

2

4

Transformer, 1

CR5 HSMS-2812B2

CR8 HSMS-2850P0

Diode,Dual,SMD,SOT-23 1

Diode,Pin,SMD,SOT-23

Diode, Schottky Detector,SMD,SOT-

23

6

1

CR9,CR10 MMBD914 Diode,SMT,SOT-23 2

U1,U2

U3,U4,U5,U6,U8,U9,U11

GALI-52

AD823AR

1

910nHy 1

IC, Monolithic Amp, SMT

IC, Dual Op Amp

3

2

7

U7 LM78L05ACM

1





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Table 2: Output Converter Parts List

P/N 50523000, Output Converter, Parts List, Page 1 HSD-2500 Transmitter

Reference Designator EMCEE Part Number

50523001

MX1 ADE-3G

R1,R3,R12

R2,R7,R8,R10

RM73B2B 271 J

RM73B2B 200 J

R6

R4,R5

R11

R9

RM73B2BT 390 J

RM73B2B 240 J

RM73B2BT 470 J

RM73B2BT 151 J

R13

R14

RM73B2BT 391 J

RM73B2BT 620 J

R25,R26,R27,R28,R29,

R30,R31,R32,R33,R34,

R35,R36,R39

R37

R38

RM73B2BT 101 J

RM73B2BT 105 J

C16,C19,C20,C21,C23,

C24,C25C28,C29

HY1 V630ME15

Q1 MMBT2222A

S1,S2,S3 470012G

U1,U2 SGA-5386

U3 SGA-4286

Value

270 Ohm

20 Ohm

39 Ohm

24 Ohm

47 Ohm

150 Ohm

Description

PC Board, Output Converter

Mixer,CD542

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

390 Ohm

62 Ohm

4.7K Ohm

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

1K Ohm

100 Ohm

Resistor,SMT,1206

Resistor,SMT,1206

1M Ohm Resistor,SMT,1206

VCO,2165 - 2360 MHz

Transistor,SOT-23

Switch

IC, Amp HBT SGE 5000MHz,SOT-86

IC,Ampl,SOT-86


1

2

1

1

1

1

3

4

1

1

18

5

1

1

3

15

5

1

1

1

1

2

1

1

3

2

1





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P/N 50523000, Output Converter, Parts List, Page 2 HSD-2500 Transmitter


U4 LT6200CS8

U5 ADF4113BRU

U6,U7 MC78L05ACD

Value Description

IC,SO-8

IC,PLL Freq Synth,TSSOP-16

IC,Regulator,+5V,SO-8


1

1

2

U9 MC34064PK

X1

IC, Under Voltage Sensing,5V,PK 1

1





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Table 3: Driver Amplifier Parts List

P/N 50524000, Driver Amplifier, Parts List, Page 1 HSD-2500 Transmitter


50524001


PC Board, Driver Amplifier

C22,C25,C26,C27

C6 600 S 1R2 B W 250

C12,C13,C15,C16,C17, 600 S 120 J W 250

C18,C23,C24

C10,C20,C21 195D226X0020Z2T

U1 AH102A

U2 LM339M

U3 LM79L05ACM

Q1 FLU17ZM

R1,R4,R10

R3,R5,R6,R7,R8,R21

R13,R16

R14

RM73B2BT 100 J

RM73B2BT 151 J

RM73B2BT 472 J

RM73B2BT 122 J

R15

R17,R18

RM73B2BT 103 J

RM73B3AT 100 J

R19 RM73B3AT 150 J

R2,R9,R20 3214W-1-201

R11,R12 MP725-1.50-1%

CP1,CP2 1X603

CR1,CR2,CR3,CR4 MMBD914

Q2,Q3 MGF0909A

1.2pF Capacitor,SMT,0603

12pF Capacitor,SMT,0603

IC,SMT,SOIC-14

IC,SMT,SO-8

FET

10 Ohm

150 Ohm

4.7K Ohm

1.2K Ohm

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

10K Ohm

10 Ohm

15 Ohm

Resistor,SMT,1206

Resistor,SMT,2512

Resistor,SMT,2512

3dB Coupler

Diode,SOT23

Transistor


1

5

10

1

8

3

1

2

1

3

6

2

1

1

1

1

1

2

2

4

2





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Table 4: 10 MHz Reference Module Parts List

HSD-2500Transmitter P/N 50525000, 10 MHz Reference, Parts List, Page 1

Reference Designator Part Number Value Description

50525001 PCBoard,10MHz Ref Input Switching

C1,C21 GRM42-6C0G270J50V 27pF Capacitor,SMT,1206

C12,C13,C16,C17 GRM42-6C0G271J50V 270pF Capacitor,SMT,1206

C10,C11,C14,C15,C23,

C24,C26

OCXO

L1,L3,L7 1008LS-103XKBC 10uHy

L5,L6 1008CS-122XKBC 1.2uHy Inductor,SMT,1008

R1,R22,R27 RM73B2BT 272 J 2.7K Ohm Resistor,SMT,1206

R2,R23,R26 RM73B2BT 474 J 470K Ohm Resistor,SMT,1206

R5

R7,R8,R28,R29

R10,R11,R21

R13,R14,R17

R15,R16

R18

R19,20

RM73B2BT 303 J

RM73B2BT 102 J

RM73B2BT 101 J

RM73B2BT 471 J

RM73B2BT 152 J

RM73B2BT 331 J

RM73B2BT 391 J

30K Ohm

IK Ohm

100 Ohm

470 Ohm

1.5K Ohm

330 Ohm

390 Ohm

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206


1

2

4

14

1

2

1

2

1

3

2

2

3

3

3

2

1

2

5

1

4

3

R25 RM73B2BT 273 J

R12 3214W-1-103E 10K 1

CR1,CR2,CR3,CR6 MMBD914

CR4,CR5 HSMP-3814

27K Ohm Resistor,SMT,1206

Diode,SMT,SOT-23

Diode,Pin,SMT,SOT-23

1

4

2

Q1 IRLML2803 Transistor,SMT,SOT-23 1





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HSD-2500 Transmitter P/N 50525000, 10 MHz Reference, Parts List, Page 2


Q2 MMBT3904

U1,U6 AD823AR

U2 DG419DY

U3 MC7805CDT

U4 MC78L05ACD

U5 GALI 33+


Transistor,Switching,NPN,SMT,SOT-


23 1

IC, Dual Op Amp,SMT,SOIC-8

IC,,SMT,SOIC-8

2

1

IC,Regulator,+5V,D-Pak 1

IC,Regulator,+5V,SO-8 1

IC,ML Amplifier 1





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Table 5: 1 st

Converter Module Parts List


HSD-2500 Transmitter P/N 50526000, 1 st

Converter, Parts List, Page 1


MX1

R1,R3,R17

R2

701004

ADE-1

RM73B2BT 391 J

RM73B2BT 120 J

R4,R5,R10,R13,R14,R18 RM73B2BT 390 J

R6 RM73B2BT 270 J

R7

R8,R35

RM73B2BT 271 J

RM73B2BT 0

R9

R11,R24

R12,R15

RM73B2BT 121 J

RM73B2BT 510 J

RM73B2BT 180 J

R30,R31,R34

R32

R33

RM73B2BT 101 J

RM73B2BT 105 J

C24,C26,C33,C37,C42,

C44,C49,C50,C51,C52,

C55,C56,C57,C58,C61,

C63,C64,C65,C66

C15,C18 600 S 2R2 B W 250

Value

390 Ohm

12 Ohm

39 Ohm

27 Ohm

270 Ohm

0 Ohm

120 Ohm

51 Ohm

18 Ohm

4.7K Ohm

1K Ohm

100 Ohm

1M Ohm

2.2pF

Description

PC Board,1st Converter

Mixer,5 - 500MHz

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Capacitor,SMT.0603

C25,C39,C40 GRM42-6C0G181J50V 180pF

C46,C48

C32,C34 GRM42-6X7R103K50V .01uF Capacitor,SMT,1206

C35,C41,C43 GRM42-6C0G471J50V 470pF


6

1

1

2

1

1

3

1

1

2

2

8

5

1

1

3

26

2

3

2

1

3

7

2

3

2





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P/N 50526000, 1 st

Converter, Parts List, Page 2 HSD-2500 Transmitter

Reference Designator Part Number Value Description

C13,C19

C16

600 S 8R2 B W 250

600 S 100 B W 250

8.2pF

10pF

Capacitor,SMT,0603

Capacitor,SMT,0603

C54,C62 ECE-V1EAG100P 10uF


1

2

1

2

C14,C17,C20 9402-0-SL1

HY1 V621ME07 VCO,1658 - 1718 MHz

L2,L5,L6 1008CS-220XJLB 22nHy Inductor,SMT,1008

3

1

1

3

2

3 L7,L8,L9 SR9000MPQ0490BY Resonator, Ceramic Coax,490MHz

Q1 MMBT2222A

U1.U2,U3 SGA-4286

Transistor,SOT-23

IC,Amp,SMT,SOT-86

1

3

U4 MC12095D IC,Prescaler,SMT,SOIC-8 1

IC,PLL Freq Synthesizer,SMT,TSSOP-

U6 ADF4113BRU 16 1

U7 MC68HC711E9CFN2

U8 MC34064PK

U9 MC34164D

U10,U11 MC7805DT

FL1 855898

R16 RM73B2BT 201 J 200 Ohm

IC, Sensor Undervoltage,SMT,SOT-89

IC, Sensor Undervoltage,SMT,SOIC-8

IC,D-Pak

Resistor,SMT,1206

IC,Amp,SMT,SOT-86

1

1

2

1

1

1

1

1 U5 SGA-4386





RELEASED: 10/2/2006

Page 68

COMMUNICATI0NS


Table 6: Display Board Parts List

HSD-2500 Transmitter P/N 50527000, Display Board, Parts List, Page 1

Reference Designator EMCEE Part Number Value Description Quantity/Assembly

1

U2 DG442DY 1

U3

U4,U5

74HC123D

74HC74D

IC, Multi-vibrator, Dual Mono,SOIC-16

IC, Dual Flip Flop,SOIC-14

1

2

Q1 - Q11 IRLML2803

DS1,DS2,DS3 SSL-LX3044LGD

Transistor, HEXFET 11

3

1

DS5 SSL-LX3044LYD

DS6,DS7 SSL-LX3055LID Red

DS8,DS9,DS10,DS11 SSL-LX3044USBD LED,

S3 8168S2HV3BE2

R1,R3,R6,R7,R9,R10,R12,

R14,R29,R31,R33,R34

R18,R21

R16,R19 RM73B2BT 511 J

R30,R32,R35

R24

RM73B2BT 621 J

RM73B2BT 274 J

C9,C10,C12,C13,C14

620 Ohm Resistor,SMD,1206

100K Ohm

510 Ohm

10K Ohm

270K Ohm

Resistor,SMD,1206

Resistor,SMD,1206

Resistor,SMD,1206

Resistor,SMD,1206

1

2

4

2

1

12

9

2

9

1

2

13

1

1

1





RELEASED: 10/2/2006

Page 69

COMMUNICATI0NS


Table 7: Control Board Parts List

HSD-2500 Transmitter

Reference Designator EMCE Part Number Value

50526001

Q1- Q12 IRLML2803

U1,U2,U5,U6 74HC21

U3,U4,U8,U9 74HC08D

U10,U13

U11,U12

U14

AD823AR

AD633AR

MC7805CDT

DS1 - DS9 SML-LXFT1206ID

R1 - R8,R13 - R24.R26 - R29, RM73B2BT 103 J

R33 -

R47,R50,R51,R52,R53,R54

R9 - R12,R32,R56 - R59

R25

R30

RM73B2BT 201 J

RM73B2BT 243 J

RM73B2BT 102 J

R31 RM73B2BT 104 J

R55

C1 - C12

J1,J2

J3

RM73B2BT 474 J

177-025-210-061

177-009-210-061

10K Ohm

200 Ohm

24K Ohm

1K Ohm

100K Ohm

470K Ohm

P/N 50528000, Control Board, Parts List, Page 1

Description

Transistor, HEXFET Power MOSFET

IC

IC, Dual Op Amp

IC, Dual Op Amp

IC5V Regulator, DPAK

LED,

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Connector,25 Pin D-Sub Female

Connector,9 Pin D-Sub Female

J5,J6,J8 22-23-2031

J7 22-23-2041

J10,J11 22-23-2151 Pin

KFS2-440 Nut, Clinch, SST PCB 4-40


1

12

4

4

1

2

2

1

9

44

9

1

1

1

2

1

12

2

2

1

2

3

1

2

6





RELEASED: 10/2/2006

Page 70

COMMUNICATI0NS


Table 8: 12.5 Watt Amplifier Parts List

HSD-2500 Transmitter

Reference Designator EMCEE Part Number Value

50531001

CP1,CP2 1X603

CP3,CP4,CP5 3W525

P/N 50531000, 12.5 Watt Amplifier, Parts List, Page 1

Description

Balun


2

3

U2,U3,U4 AD817AR

U5 MC79M05DT

IC,Amplifier,SOIC-8

U7 MC7805CDT

R1,R2,R3,R4

R5,R8,R14,R15,R16,R17,

R7,R10

R11,R12,R13,R22,R23

RM73B2BT 201 J

RM73B2BT 100 J

R18,R19,

R6,R9 3214W-1-201

RM73B2BT 151 J

RFP-20-50TPC

R39,R40

200 Ohm

10 Ohm

200 Ohm

150 Ohm

50 Ohm

10K Ohm

IC

Resistor,SMT,1206

Resistor,SMT,1206

Potentiometer, Top Adjust

Resistor,SMT,1206

Termination,50 Ohm 20W

Resistor,SMT,1206

R25,R29,R46

R27,R31,R48

R33,R42

R36

RM73B2BT 182 J

RM73B2BT 122 J

RM73B2BT 102 J

RM73B2BT 273 J

1.8K Ohm

1.2K Ohm

1K Ohm

27K Ohm

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

Resistor,SMT,1206

R41 RM73B2BT 123 J 12K Ohm Resistor,SMT,1206

Resistor,20W,TO-263 (

TDH35PR250JE )

3

1

1

1

4

8

2

2

5

7

3

3

2

1

1

3

R26,R30,R44,R47

C1,C4,C5,C6,C9,C10,C15,

3214W-1-102

600 S 120 JW 250

C16,C17,C18,C22,C23,C27,

C28,C29,C32,C37,C38,C39

C40,C48,C49,C50,C51,C55,

C56,C57,C58,C66,C67,C68,

C69

C20,C42,60 600 S 1R0 BT 250

1K Ohm

12 pF

Potentiometer, Top Adjust

Capacitor,SMT,0603

Capacitor,SMT,0603

4

32

3 1 pF

C21,C43,C61

C30,C44,C62

600 S 1R2 BT 250

600 S 1R5 BT 250

1.2 pF

1.5 pF

Capacitor,SMT,0603

Capacitor,SMT,0603

3

3





RELEASED: 10/2/2006

Page 71

COMMUNICATI0NS


HSD-2500 Transmitter P/N 50531000, 12.5 Watt Amplifier, Parts List, Page 2


C31,C45,C63


600 S 0R6 BT 250

C2,C7,C11,C14,C19,C24, GRM42-6C0G104M50V

C26,C33,C35,C36,C41,C47,

C52,C54,C59,C65,C70,C72,

C73,C74,C75,C76,C77,C78,

C79

C46,C53,C64,C71

CR1,CR2,CR3,CR4,CR5 MMBD914

Q1,Q2 MGF0909A

Q3,Q4,Q5 FLL310IQ-3A

Value

0.6 pF

Description

Capacitor,SMT,0603

.1 Capacitor,SMT,1206

Diode,SMT,SOT-23

Transistor, GaAs FET


3

25

10

5

2

3

Q6,Q7 IRLML2803 HEXFET

R37,R38 MP725-1.50-1% 1.5 Ohm Resistor,1.5 Ohm 20W

2

2





RELEASED: 10/2/2006

Page 72

COMMUNICATI0NS


Table 9: Metering Detector Parts List

HSD-2500 Transmitter P/N 30400038, Metering Detector, Parts List


U1,3


AD8361

CR1,2 MMBD914


IC, DETECTOR (AD8361ARM)

DIODE

.1uF .1UF


2

2

2

8

2

2

2

2

2

2

R1,9

R2,10

R3,11

RM73B2BT 680 J

RM73B2BT 151 J

RM73B2BT 330 J

68 Ohm

150 Ohm

33 Ohm

RESISTOR,CHIP 68 OHM



R4,5,12,13

R6,14

R8,16

R7,15

RM73B2BT 103 J

RM73B2BT 474 J

RM73B2BT 102 J

RM73B2BT 225 J

10K Ohm

470K Ohm

1K Ohm

2.2M Ohm

RESISTOR,CHIP 10K OHM



RESISTOR,CHIP 2.2M OHM

4

2

2

2

JP1,2 S9001-ND SHUNTS 2

JP1,2 103747-3 ROW,3

FB1

J3

BLM21A601S

22-05-3051

CHIP, FERRITE BEAD (SMT)

CONN PCB,R/A 5 PINS,.100 LS

1

1





RELEASED: 10/2/2006

Page 73

COMMUNICATI0NS


7 SCHEMATIC DIAGRAMS

This section contains schematic diagrams. The diagrams are found in the following order. Following each schematic diagram the associated circuit board component layout may be found.

50520000 Interconnection Diagram, Up-Converter Drawer

50500000 Interconnection Diagram, S-Band Transmitter

50521002 Schematic Diagram, 1

st

IF

50523002 Schematic Diagram, Output Converter

50524002 Schematic Diagram, Driver Amplifier

50525002 Schematic Diagram, 10 MHz Reference

50526002 Schematic Diagram, 1

st

Converter

50527002 Schematic Diagram, Display Board

50528002 Schematic Diagram, Control Board

50531002 Schematic Diagram, 12.5 Watt Amplifier

30400038 Schematic Diagram, Metering Detector





Figure 1: Up-Converter Interconnection Diagram

Page 74

This is an unpublished work protected by the United States copyright laws and is proprietary to EMCEE Communications. Disclosure, copying, reproduction, merger, translation, modification, enhancement or use by anyone other than authorized employees or licensees of EMCEE

Communications without the prior written consent of EMCEE Communications is strictly prohibited.



Page 75

Figure 2: Transmitter Interconnect Diagram

A5 W8

HIGHEST REFERENCE DESIGNATIONS

B3 P17 PC2 PS1 TB2 J8 M1

REFERENCE DESIGNATIONS NOT USED

AT1

P8

J8

H N G

AC IN

FORWARD PWR

REFLECTED PWR

+5V INPUT

NC

PWR SUPPLY CONTROL

+5V

GND

NC

GND

7

8

4

5

6

9

1

2

3

J3 P9

A5P7-5

A5P7-1

PS1P6-8

NC

PS1P6-1

A5P7-3

A5P7-4

NC

PS1P6-23

PS1

TB1 TB2 TB3 TB4 TB5

12V

POWER SUPPLY

PN 50540000

TB6

J1

P6

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

PS1TB6

PS1TB4

PS1TB2

A1P8-H

A1P8-N

PS1TB5

PS1TB3

PS1TB1

TB1

10

9

8

7

6

4

5

3

2

1

AC

POWER

CB1

15A

AC HOT

NEUT.

AC

MAINS

B1

J5

IF INPUT

J4

EXTERNAL

10MHz

INPUT

A1

HSD

UPCONVERTER

PN 50520000

(50520002)

AMP 5-12V STATUS

AMP 6-12V STATUS

AMP 7-12V STATUS

AMP 8-12V STATUS

AMP 5 TEMP STATUS

AMP 6 TEMP STATUS

AMP 7 TEMP STATUS

AMP 8 TEMP STATUS

NC

AMP 5 FAULT

AMP 6 FAULT

AMP 7 FAULT

AMP 8 FAULT

AMP 5 -12V

AMP 6 -12V

AMP 7 -12V

AMP 8 -12V

AMP 5 GND

AMP 6 GND

AMP 7 GND

AMP 8 GND

NC

NC

NC

NC

AMP 1-12V STATUS

AMP 2-12V STATUS

AMP 3-12V STATUS

AMP 4-12V STATUS

AMP 1 TEMP STATUS

AMP 2 TEMP STATUS

AMP 3 TEMP STATUS

AMP 4 TEMP STATUS

NC

AMP 1 FAULT

AMP 2 FAULT

AMP 3 FAULT

AMP 4 FAULT

AMP 1 -12V

AMP 2 -12V

AMP 3 -12V

AMP 4 -12V

AMP 1 GND

AMP 2 GND

AMP 3 GND

AMP 4 GND

NC

NC

NC

NC

J2 P4

7

8

9

3

4

5

6

1

2

16

17

18

19

20

21

22

10

11

12

13

14

15

23

24

25

J1 P5

3

4

6

5

7

8

9

1

2

20

21

22

23

24

25

16

17

18

19

10

11

12

13

14

15

A3P1-4

A2P1-4

A3P1-3

A2P1-3

A3P1-5

A2P1-5

A3P1-2

A2P1-2

W1

J1

DC1

HSD

SPLITTER

50511000

J5

J4

W2

W3

A2

J1

IN

12.5W

POWER

AMPLIFIER

50531000

P1

1 2 3 4 5 6

A3

J1

IN

12.5W

POWER

AMPLIFIER

50531000

P1

1 2 3 4 5 6

OUT

J2

OUT

J2

W4

W5

J3

J2

A4

J4

AT1

50

10W

2 WAY

COMBINER

50512000

J5

B2

J1

AT2

50

10W

W6

DC2

DIRECTIONAL COUPLER

PN 440951

TRANSMITTER LOAD

A5

RFSC

W7

J3

P7

1 2 3 4 5

INCIDAT

J2

METERING DETECTOR

PN 40400053-1

(30400038)

J1

W8

W9

RF OUTPUT

J7

RF OUTPUT

10MHz

A3P1-1

A2P1-1

ECN DATE

NEXT ASSY:

BY

VERSION

MODEL

SCALE

TOLERANCES - EXCEPT AS NOTED

DECIMAL .XX

+-

.XXX +-

FRACTIONAL

-

+ 1/64"

ANGULAR +1/2 DEG

.010

.005

HSD Series TM Transmitter

© 2006 EMCEE Communications

DRAFT

9-28-06 CTT

DR. CHK

M. ENGR

E. ENGR

RELEASE

CHK

HSD-2500

CHK

APPV'L

INTERCONNECTION DIAGRAM,

SHEET

50500000

1

OF

1





Page 76

Figure 3: 1 st

IF, Schematic Diagram

J6


E6 Q4 U11 CR10 L4 T1 R78 C42


J1 Pin 6

E3

FORWARD

SAMPLE IN E5

CW

R64

10K

3/4W

SAMPLE

ADJ

7

.1uF

R68

10K

+12V

C32

5

6

8

4

U4B

+

-

+12V

+

-

U9B

8

6

5

+5V

R67

10K

R38

15K

7

R39

10K

R37

10K

R69

10K

R66

10K

R65

10K

R41

10K

+12V

+5V

R42

10K

3

C33

.1uF

3

2

7

2

+

-

+

-

R43

12K

U4A

+12V

8

4

U5B

R70

20K

U9A

4

-12V

-

+

1

1

6

C39

.1uF

R33

10K

5

R44

10K

R45

10K

R50

10K

IRLML-2803

R76

1M

R51

1K

G

3/4W

CW

POWER

ADJ

D

S

Q1

5

6

1

+

-

+5V

R47

10K

R46

10K

+12V

8

4

U6A

C41

.22uF

U11B

4

-12V

+

-

R49

6.2K

7

3

2

R52

10K

R53

470K

NC

5

NC

4

+ C34

100uF

16V

Q2

IRLML-2803

+12V

C1

.01uF

IF

IN

J1 E1

-5 to -25dBm

R1

470

C2

.01uF

C4

.1uF

R2

1.5K

+5V

R5

470

R3

1.5K

HSMP-3814

CR1 CR1

C6

.01uF

R6

270

R7

62

1

C3

.01uF

U3A

C5

.01uF

+

R4

470

2

3

+5V

1

R34

10K

U1

C8

.1uF

C7

.01uF

GALI 52

2,4

7

3

C30

.1uF

R8

150

1W

L1

4.7uHY

C9

.01uF

CP1

+12V

LRPS-2-1

C27

47pF

L3

910nHY

C10

.01uF

L2

220 nHY

C28

27pF

8

4

R32

100K

U3B

-

+

6

5

R31

100K

C11

.01uF

C29

.01uF

R9

470

CR8

HSMS-2850

C13

.1uF

1

U5A

R48

10K

C17

.1uF

R10

1.5K

R13

470

R11

1.5K

C12

.01uF

C16

.01uF

HSMP-3814

CR3

C14

.01uF

CR4

C15

.01uF

1

GALI 52

R14

270

R12

470

+12V

R15

62

R58

1K

1/4W

CW

CORRECTOR

THRESHOLD

3

2

U2

2,4

3

-

+

+12V

U8A

8

4

R16

150

1W

C18

.01uF

R59

1K

6

5

-

+

U8B

T1

C20

.01uF

1

ADT-4-1WT

L5

4.7uHY

R61

62

R63

1K

+ C36

4.7uF

25V

C38

.01uF

7

R62

1K

25V

R17

270

HSMS-2812

CR5

L4

C37

.01uF

R18

1K

1/4W

CW

CORRECTOR

4.7uHY

SLOPE

3 2

+12V

U7

LM78L05

8

7 6 3 2 1

Q3

IRLML-2803

NC

D

S

R54

47K

+12V

R55

10K

7

G

D

S

SPARE

U6A

G

+

-

R56

10K

5

6

R56

10K

E4

J1 Pin 5

OPERATE

CONTROL

(HIGH=OPERATE)

ECN DATE

NEXT ASSY:

R20

8.2

R19

180

BY

VERSION

MODEL

SCALE


DECIMAL

.XX

.XXX

FRACTIONAL

ANGULAR

-

+

-

+

-

+

-

+

1/64"

1/2 DEG

.010

.005

R22

8.2 .01uF

R21

150

+5V

C22

R73

6.2K

C23

.01uF

C42

.1uF

R23

470

+12V

DRAFT

DR. CHK

M. ENGR

E. ENGR

RELEASE

R75

10K

2

3

C25

.1uF

+5V

R24

1.5K

C27

.01uF

8

8

3

6-18-06

1

HSD Series

1

R74

47K

7

TM

4

R27

470

270

U10

DG419

2

R25

1.5K

HSMP-3814

CR6 CR7

R28

R29

62

U11A

R77

20K

R73

10K

CTT

C24

.01uF

+5V

CR9

MMBD914

5

6

CR10

MMBD914

D

R26

470

C26

.01uF

E2

J2

IF

OUTPUT

-15dBm Typ.

R71

10K

G

S

R72

10K

Transmitter


C40

.1uF

E6

AGC CONTROL

LOW=AGC ON

HIGH=AGC OFF

CHK

50521002A

SHEET 1 OF 1

J1 Pin 9

+12V

OUTPUT

J1 Pin 7

J1 Pin 8

-12V

CHK APPV'L

SCHEMATIC DIAGRAM,

1 ST IF





Page 77

Figure 4: 1st IF, Component Layout





Page 78

Figure 5: Output Converter, Schematic Diagram

MX1


FL2 J3 E4 U8 S3 X1 Q1 R39 C29


INPUT

374 MHz

J3

E1

2 1

1,4,5

MX1

ADE-3G

6

3

SEE NOTE-2

R1

270

R3

270

Filter 1

SEE NOTE-1

+5V

SGA-5286

1

U1

2,4

3

C5

.1uF

R5

24

C1

4pF

Filter 2

SEE NOTE-1

+5V

SGA-5386

1 U2

2,4

3

C4

.1uF

R4

24

C2

4pF

NOTE:

1-Filter 1 AND Filter 2 ARE STRIP LINES

ON PC BOARD.

2-FINAL VALUE OF RESISTORS R1,R2,

AND R3 WILL BE DETERMINED BY

TEST DEPARTMENT.

C3

4pF

E2

J4

CHANNEL

OUTPUT

2500-2700MHz

1MHz STEPS

BARRIER

IN

10 MHz

J2

E3

+5V

R6

39

R32

R31

R30

R29

R28

R27

R26

R25

R24

C25

.1uF

+5V

4.7K

4.7K

4.7K

4.7K

4.7K

4.7K

4.7K

4.7K

4.7K

8

2

S2

1

C

4

8

2

S1

1

C

4

U9

MC34064PC

+5V

R23

4.7K

R22

4.7K

1

INPUT

RESET

3

GND

2

C24

.1uF

C22

.47uF

C27

27pF

+5V

R39

4.7K

3

NC

4

NC

5

NC

6

9

10

11

12

13

26 2 52

VDD MODB VRH

MODA

SRTA/AS

E

NC

PC0

VRL

51

PE7

50

49

PE3

PE6

48

PE2

PE5

PE1

47

46

45

PC1

PC2

PC3

PE4

PE0

44

43

42

PB0

PB1

41

40

PC4

U8

PB2

PB3

39

NC

C28

.1uF

4

1

C S2

2

8

R16

1K

4.7K

4.7K

4.7K

4.7K

+5V

17

18

19

NC

20

21

NC

22

NC

NC

23

NC

24

NC

25

14

15

16

PC5

PC6

PC7

MC68HC711E9CFN2

PB4

PB5

PB6

PB7 RESET

XIRQ

IRQ

PA0

PA1

38

37

36

35

PD0

PD1

PD2

PD3

PD4

PA2

PA3

PA4

PA5

PA6

34

33

32

31

30

29

28

27

PD5

EXTAL

7

XTAL

8

PA7

VSS

1

NC

NC

NC

NC

NC

NC

NC

NC

R38

1M R37

100

R17

1K

R18

1K

R19

1K

R33

R34

Q1

MMBT2222A

C8

.1uF

C6

6pF

C7

6pF

SGA-4286

3

2,4

U3

1

R35

R36

+5V

R20

4.7K

C29

.1uF

11

13

14

7 15 16

8 OSCin

U5

RSET

ADF4113BRU

12

Data

CE

C19

.1uF

10

1

R15

4.7K

C18

6pF fin

6

Clock

LE

Fo/LD CPo

2

+5V

R21

1K

C17

12pF

5 3 4 9

E4

LOCK

OUT

C9

6pF

DETECT

C16

.1uF

R7

20

X1

C26

27pF

+5V

C11

.1uF

C10

6pF

R9

150

C15

.01uF

R10

20

P1

P3

P2

P4 HY1

V630ME15

+12V

C13

.1uF

6

R11

47

3

2

+

U4

LT6200

-

4

7

R14

62

C14

3uF

R13

390

C12

.1uF

+5V

C22

.1uF

1 U7

LM78L05

7 6 3 2

8

FL2

FL1

+12V

C21

.1uF

8

U6

LM78L05

2 3 6 7

1

+5V

C20

.1uF

C

B

D

J1

A

ECN DATE

NEXT ASSY:

BY

VERSION

MODEL

SCALE


DECIMAL

.XX

.XXX

FRACTIONAL

ANGULAR

-

+

-

+

-

+

-

+

1/64"

1/2 DEG

.010

.005

HSD Series

BARRIER


DRAFT

DR. CHK

M. ENGR

E. ENGR

RELEASE

6-14-06

TM Transmitter

CTT

CHK CHK APPV'L

SCHEMATIC DIAGRAM,

OUTPUT CONVERTER

50523002A

SHEET 1 OF 1





Page 79

Figure 6: Output Converter, Component Layout





Page 80

Figure 7: Driver Amplifier, Schematic Diagram

J4


CP2 Q3 E4 U3 CR4 FL3 R21 C27


RF

IN

J2

E1

C1

4pF

C25

.1uF

R15

10K

R14

1.2K

8

9

10

11

6

7

4

5

+12V +12V

-

+

-

+

3

-

+

U2

-

+

LM339

2

NC

1

14 NC

13

NC

R13

4.7K

E4

STATUS

OUT

C3

.1uF

C2

4pF

AH102A

1

U1

2,4

3

+12V

R19

1W

C6

.7pF

12

C5

.1uF

C4

4pF

R1

10

-5V

R21

150

CW

R20

200

1/4W

C10

22uF

20V +

C9

.1uF

C8

4pF

+12V

MMBD914

CR3 CR2

R18

10

1W

R17

10

1W

CR4

-5V

R2

200

1/4W

R3

150

CW

"A"

C7

4pF

IN 0

R4

10

C13

12pF

G

D

S

Q1

FLU17ZM

CP1

1X603

C16

12pF

ISO -90

CR1

C11

.1uF

R5

150

R6

150

R7

150

-5V

R9

200

1/4W

R8

150

CW

R10

10

C15

12pF

G

D

S

Q2

MGF0909A

S

G

Q3

D

MGF0909A

"A"

R11

1.5

+12V

+

C20

22uF

20V

C19

.1uF

+12V

C22

.1uF

R12

1.5

+

C21

22uF

20V

C17

12pF

C24

12pF

C27

.1uF

-5V -12V

1

NC

8 7 6

U3

MC79L05

2 3 4

NC

5

-90

0

CP2

1X603

ISO

IN

C26

.1uF

E3

E2

J3

J4

OUTPUT

TO LOAD

OUTPUT

ECN DATE

NEXT ASSY:

BY

VERSION

MODEL

SCALE


DECIMAL

.XX

.XXX

FRACTIONAL

ANGULAR

-

+

-

+

-

+

-

+

1/64"

1/2 DEG

.010

.005

FL3

FL1

FL2

C

B

D

J1

A



DRAFT 6-15-06

CTT

DR. CHK

M. ENGR

E. ENGR

RELEASE

CHK CHK APPV'L

SCHEMATIC DIAGRAM,

HSD DRIVER AMPLIFIER

50524002A

SHEET 1 OF 1





Page 81

Figure 8: Driver Amplifier, Component Layout





Page 82

Figure 9: 10 MHz Reference, Schematic Diagram

J4


HY1 Q2 E4 U6 CR6 L7 R29 C26


EXTERNAL 10MHz

INPUT

0dBM MIMIMUM

J2

E1

C1

27pF

L1

10uHY

+5V

(A)

R12

10K

1/4W

CW

C7

.1uF

7

6

MMBD914

CR3

R10

100

5

+5V

(B)

+12V

4

CR2

HY1

C4

.1uF

1

+5V

(B)

R8

1K

R7

1K

10 MHz

R11

100

C5

.1uF

+12V

+5V

2

3

8

10 MHz

4

U10

DG419

5

7 6

1

C8

.1uF

C9

.1uF

R14

470

+12V

R15

1.5K

R13

470

R16 C10

1.5K .1uF

HSMP-3814

CR4 CR5

C11

.1uF

C26

.1uF

R18

330

L2

820nHY

R17

470

C12

270pF

C24

.1uF

+5V

(A)

R28

16

R27

3.9K

Q2

R29

1K

7

MMBT3904

U6B

AD823

-

C25

.15uF

+ 5

6

R26

1K

C13

270pF

1

C15

.1uF

R19

390

GALI 33

R20

390

L3

10uHY

C14

.1uF

U5

2,4

3

L4

820nHY

C16

270pF

C23

.1uF

1

R24

10K

+12V

8

4

U6A

AD823

-

+ 3

2

R23

470K

C17

270pF

CR6

MMBD914

C22

.22uF

R22

2.7K

R25

27K

+5V

+5V

(B)

C3

.1uF

L7

10uHY

L6

1.2uHY

C21

270pF L5

1.2uHY

C18

470pF

CR1

MMBD914

R1

2.7K

C2

.22uF

R2

470K

R4

10K

5

6

+

AD823

-

U1B

R3

10K

7 3

2 -

+

U1A

AD823

8

4

1

Q1

IRLML2803

G

R9

10K

D

S

R72

10K

E4

EXTERNAL

10MHz INDICATION

C6

.1uF

+5V

(A)

3

OUT

U3

MC7805

GND

2

C20

220pF

C19

220pF

+12V

INPUT

IN

1

E2

J3

10MHz@ 1Vpp

R21

100

E3

J4

OUTPUT

FL2

FL1

8

J1

NC NC

4 5

U4

LM78L05

2 3 6 7

1

+5V

(B)

ECN DATE

NEXT ASSY:

BY

VERSION

MODEL

SCALE


DECIMAL

.XX

.XXX

FRACTIONAL

ANGULAR

-

+

-

+

+

-

+

-

1/64"

1/2 DEG

.010

.005



DRAFT 6-22-06

CTT

DR. CHK

M. ENGR

E. ENGR

RELEASE

CHK CHK APPV'L

SCHEMATIC DIAGRAM,

10 MHz REFERENCE WITH

EXTERNAL INPUT SWITCH

SHEET

50525002A

1 OF 1





Page 83

Figure 10: 10 MHz Reference, Component Layout





Page 84

Figure 11: First Converter, Schematic Diagram

J4


HY1 Q2 E7 U6 CR6 L7 Z3 R29 C26


+5V +5V

+5V

J1

E1

INPUT

37 OR 44MHz

-15dBm

2 1

1,4,5

MX1

ADE-1

6

3

R1

390

C5

.1uF

R3

390

C3

.1uF

C2

220 pF

C1

220pF

SGA-4286

1

U1

2,4

3

R4

39

L1

10nHY

C4

27pF

3

1

2

4

855898

FL1

7

5

6

8

C7

47uF

10V

+

C6

.1uF

C8

.1uF

R5

39

C9

.1uF

C10

C11

3.9pF

SGA-4286

1

U2

L2

22nHY

2,4

3

L3

150 nHY

C12

3.9pF

C14

.5-2.5

pF

Z1

SR9000MPQ490BY

C15

2.2pF

C13

8.2pF

+5V

C17

.5-2.5

pF

Z2

C16

10pF

C18

2.2pF

C19

8.2pF

Z3

C20

.5-2.5

pF

C21

3.9pF

E2

J2

374MHz

IF OUTPUT

-15dBm

+5V

+5V

C64

.1uF

+12V

C63

.1uF

10MHz

INPUT

C55

.1uF

J4 E4

+ C54

10uF

25V

1 IN

U3

MC7805

OUT

GND

2

3

+5V

1

IN

U3

MC7805

GND

2

OUT 3

C62

10uF

25V

+

C65

.1uF

4.7K

C57

.1uF

L6

22nHY

C47

7.5pF

R30

L5

22nHY

C46

12pF

R18

39

L4

C40

27pF

C45

7.5pF

C43

470 pF

C41

C44

.1uF

C42

.1uF

SGA-4286

3

2,4

U5

1

C39

180pF

X1

R17

390

R16

390

C66

.1uF

R14

39

C33

.1uF

C37

.1uF

+5V

NC

4 3 2 1

U4

MC12095D 7

5 6

NC

8

C36

12pF

R15

18

C30

12pF

C35

470 pF

+5V

C31

12 pF

SGA-4286

C32

.01uF

C29

12pF

3

2,4

U3

1

C34

.01uF

R13

39

R10

39

C49

.1uF

+5V C28

12pF

OPEN=NTSC

CLOSED=PAL

R31

4.7K

3

U8

MC34064

1

2

C58

.1uF

1

2

3

4

E5

E6

U9

C61

.1uF

R35

0

C56

.1uF

5

8

6

7

R34

4.7K

E7

+5V

NC

NC

NC

NC

+5V

R28

4.7K

C59

27pF

R29

4.7K

NC

R33

1M

C60

27pF

+5V

R32

100 NC NC NC

R25

4.7K

9

8

10

15

16

18

19

XTAL

PC0

PC1

PC2

11

12

13

14

PC3

PC4

PC5

PC6

PC7

XIRQ

IRQ

17

20

RESET

PD0

7 6 5 4 3 2 1

U7

52

68HC711E9

21 22 23 24 25 26 27 28

51 50 49 48 47

29 30 31 32 33

+5V

NC NC NC NC NC NC NC NC NC

C53

.22uF

MC34164

PE5

PE1

PE4

PE0

46

PB0

PB1

PB2

PB3

41

40

39

PB4

PB5

PB6

PB7

PA0

35

34

38

37

36

45

44

43

42

NC

NC

NC

NC

NC

R21

1K

R22

1K

R23

1K

R24

51

C51

.1uF

R20

1K

R11

51

C48

12pF

C27 +

47uF

10V

R9

120

C26

.1uF

R12

18

P1

C25

180pF

P4

8 7 6 5 4

U6

AD4113

3

R19

4.7K

+5V

2 1

16

15

9 11 12 13 14 10

R8

0

ECN DATE

NEXT ASSY:

BY

VERSION

MODEL

SCALE


DECIMAL

.XX

.XXX

FRACTIONAL

ANGULAR

-

+

-

+

+

+

-

-

1/64"

1/2 DEG

.010

.005

C52

.1uF

R26

4.7K

+5V

1K

DR. CHK

M. ENGR

E. ENGR

P3

RELEASE

HY1

V621ME07

C50

.1uF

R27

Q1

P2

C24

.1uF

E3

MMBT2222A

HSD Series

J3

TM

R6

27

R7

270

C23

10uF

C22

.1uF

Transmitter


DRAFT 6-22-06 CTT

SHEET

CHK

50526002A

1 OF 1

CHK

APPV'L

SCHEMATIC DIAGRAM,

HSD

FIRST CONVERTER





Page 85

Figure 12: First Converter, Component Layout





Page 86

Figure 13: Display Board, Schematic Diagram

S3


U5 DS11 Q11 C14 R35


R23

10K

+5V +5V +5V

R24

270K

C11

1uF

C7

.1uF

+5V

C8

.1uF

10

7 REXT

16

VCC

Q

GND

6

U3

CLR

74HC123

COX

11

R

5

8

3

2R

9

R22

10K

+5V

3

1

2

S3

MOMENTARY

+12V C14

.1uF

+5V

12

11

3

2

D

D

R27

47K

14

VCC

+5V

4

SET

+5V

+5V

10

SET

CLK

U5B

74HC74

R26

10K

RESET

13

C10

.1uF

U5A

74HC74

CLK

GND

7

RESET

1

2 D

4

SET

U4A

74HC74

3 CLK

GND

7

RESET

1

Q

6

Q

5

Q

8

Q

9

R34

620

D

FWD POWER

DS11

SSL-LX3044USBD

G

+12V

C6

.1uF

NC

NC

S

Q11

IRLML2803

R35

10K

U2

13

D

7

+12V

8

R33

620

REFL POWER

D

DS10

SSL-LX3044USBD

G

CONTROL

DG442

4

S

C5

.1uF

6

-12V

S

Q10

IRLML2803

R32

10K

1

U2

D

2

+12V

CONTROL

DG442

S

3

C9

.1uF

R31

620

+12V

D

DS9

SSL-LX3044USBD

G

Q 6 NC

Q 5

S

Q9

IRLML2803

R30

10K

9

+12V

U2

CONTROL

DG442

D

S

10

11

+5V

12 D

14

VCC

10

SET

11 CLK

U4B

74HC74

RESET

13

C12

.1uF

R29

620

D

-12V

DS8

SSL-LX3044USBD

G

Q

8 NC

Q

9

S

Q8

IRLML2803

+5V

R25

10K

C13

.1uF

R28

10K

16

U2

CONTROL

DG442

D

S

15

14

+12V

R14

620

VSWR OVLD

SSL-LX3044LID

DS7

D

Q7

IRLML2803

G

S

R15

100K

R17

1K

1/4W

R20

1K

1/4W

R21

51

R19

4.7K

R18

100K

R16

4.7K

R12

620

SSL-LX3044LID

FAULT

DS6

D

Q6

IRLML2803

G

S

100K

R10

620

TEMP FAULT

SSL-LX3044LXD

DS5

D

Q5

IRLML2803

G

S

R11

100K

10K

AGC

3

OPERATE/

STANDBY

ON 3

2

ON 1

2

S1 1

S2

Q4

IRLML2803

G

R8

100K

D

S

R7

620

R

+12V

G

R9

620

C1

.1uF

OP/STDBY

Q3

IRLML2803

G

D

R5

100K

S

LO. LOCK

DS3

R4

620

SSL-LX3044LGD

+12V

Q2

IRLML2803

G

R4

100K

D

S

IF INPUT

R3

620

DS2

SSL-LX3044LGD

Q1

IRLML2803

G

D

R2

100K

S

EXT 10MHz

R1

620

DS1

SSL-LX3044LGD

J2 J1

C3

.1uF

+12V

INPUT

8

NC NC

4 5

U1

LM78L05

2 3 6 7

1

+5V

C4

.1uF

ECN DATE

NEXT ASSY:

BY

VERSION

MODEL

SCALE


DECIMAL

.XX

.XXX

FRACTIONAL

ANGULAR

-

+

-

+

+

-

+

-

1/64"

1/2 DEG

.010

.005



DRAFT 7-27-06 CTT

DR. CHK

M. ENGR

E. ENGR

RELEASE

CHK CHK APPV'L

SCHEMATIC DIAGRAM,

DISPLAY BOARD

SHEET

50527002A

1 OF 1





Figure 14: Display Board, Component Layout

Page 87





Page 88

Figure 15: Control Board, Schematic Diagram


C79 R45 Q7 U7 CR5 J7 E16 T3

FL11 CP5


TO POWER AMPLIFIERS 1-4 TO POWER AMPLIFIERS 5-8

TO U/C

POWER

SUPPLY

J4-1

J4-2

J4-3

J4-4

J4-5

J4-6

J4-7

J4-8

J4-9

J4-10

-12V

+12V

R12

200

-12V

AMPL 1 FAULT

DS4

+5V +5V

R13

10K

R14

10K

R15

10K

R16

10K

R59

200

-12V

AMPL 5 FAULT

DS9

+5V

+5V

R11

200

AMPL 2 FAULT

DS3

R58

200

AMPL 6 FAULT

DS8

R1 R2

10K 10K

R3

10K

R4

10K

6

+5V

14

U1A

74HC21

7

4

5

2

1

+5V

R5 R6

10K 10K

R7

10K

R8

10K

9

10

12

13

U1B

74HC21

8

R10

200

R9

200

AMPL 3 FAULT

DS2

AMPL 4 FAULT

DS1

13

12

10

9

SML-LXFT1206ID

(TYP)

+5V

C1

.1uF

14

U2B

74HC21

7

8

8

6

+5V

14

U5A

74HC21

7

5

4

2

1

U5B

74HC21

9

10

12

13

+5V

R20

10K

R19

10K

R18

10K

R17

10K

R57

200

R56

200

1

2

4

5

TO 1

+5V

14

U3A

74HC08

7

C3

.1uF

3

U3B

74HC08

7

ST

6

12

13

+5V

R27

10K

D

G

+5V

R26

10K

R25

24K

S

Q3

IRLML2803

Q4

IRLML2803

CONVERTER

10

9

U3C

74HC08

8

Q1

IRLML2803

+5V

R21

10K

D

G

S

+12V

+5V

R22

10K

Q2

IRLML2803

+5V

R23

10K

D

S

G

+12V

+5V

R24

10K

D

S

R30

1K

TO OUTPUT CONV.

G

U3D

74HC08

11

+5V

12

13

14

U4D

74HC08

7

C2

.1uF

11

9

10

U4C

74HC08

8

+5V

R35

10K

D

G

Q7

S

IRLML2803

R28

10K

2

1

+5V

14

U8A

74HC08

7

3

11

2

+5V

14

1

U9A

74HC08

7

3

R29

10K

DS5

SML-LXFT1206ID

R31

10K

G

D

R32

10K

+12V

-12V S

Q5

IRLML2803

TO DRIVER AMP

+5V

DS5

10

9

U8C

74HC08

8 G

+5V

D

R38

10K

+12V

TO 10 MHz REF.

+5V

S

Q8

IRLML2803

R33

10K

+5V

R34

10K

D

G

S

Q6

IRLML2803

13

U9D

74HC08

12

+5V

R40

10K

R41

10K

+5V

C6

.1uF

R36

10K

+5V

1

3

5

RESET

14

VCC

CLK

U7A

74HC74

Q

GND

7

D

2

SET

Q

9 Q

8

Q

4

6

+5V

TEMPERATURE

RESET

S1

C4

.1uF

13

RESET

CLK

U7B

74HC74

D

12

11

SET

10

R37

10K

+5V

C5

.1uF

NC NC

TO 1 ST IF BOARD

D

R39

10K

+5V

G

A

D

G 8

S

Q9

IRLML2803

S

Q10

IRLML2803

-12V +12V

NC

AMPL 7 FAULT

DS7

AMPL 8 FAULT

DS6

13

12

10

9

+5V

SML-LXFT1206ID

(TYP)

C10

.1uF

14

U6B

74HC21

7

8

13

12

U8D

74HC08

9

U9C

74HC08

10

11

S2

VSWR

RESET

R43

10K

R42

10K

+5V

-12V

+12V

-12V 8

7

+12V

6

3

U11

AD633AR

4

C9

.1uF

+12V

2

8

U10B

AD823AR

-

4

+

6

5

7

5

1 7

R52

10K

8

U13B

AD823AR

+

4

-

6

5

R53

10K

R55

470K

+5V

R54

10K

R51

10K

+12V

6

C8

.1uF

3

U12

AD633AR

TO DISPLAY BOARD

-12V

8

+12V

4

A

2

7

1

5

TO METERING DETECTOR & 12V SUPPLY

1

R49

10K

1/4W

U13A

AD823AR

+

-

3

2

R45

10K

NC

ECN DATE

NEXT ASSY:

BY

VERSION

MODEL

SCALE


DECIMAL .XX

.XXX

-+

-+

FRACTIONAL

-+ 1/64"

ANGULAR

-+ 1/2 DEG

.010

.005

R48

10K

1/4W

1

D

R46

10K

+5V

G

U10A

AD823AR

+

-

3

2

HSD Series

DR. CHK

M. ENGR

E. ENGR

RELEASE

C11

.1uF

D

TM

+5V

G 8

S

Q11

IRLML2803

S

Q12

IRLML2803

SPARES

NC

6

3

U14

MC7805

GND

2

IN

1

+12V

-12V

NC

J11-15

J11-14

J11-13

J11-12

J11-11

J11-10

J11-9

J11-8

J11-7

J11-6

J11-5

J11-4

J11-3

J11-2

J11-1

U2A

74HC21

4

5

2

1

Transmitter


DRAFT 8-1-06 CTT

+12V

CHK

C12

.1uF

CHK

SHEET

50528002A

1

OF

1

APPV'L

SCHEMATIC DIAGRAM,

CONTROL BOARD





Page 89

Figure 16: Control Board, Component Layout





Page 90

Figure 17: 12.5 Watt Amplifier, Schematic Diagram


C79 R45 Q7 U7 CR5 J7 E16 T3

FL11 CP5


J1

RF IN

R10

150

R1

200

1/4W

IN

ISO

CP1

1X603

0°

90°

R2

200

R7

150

R6

200

1/4W

R3

200

+

C8

22uF

16V

+

R4

200

C3

22uF

16V

C7

.1uF

C2

.1uF

C6

12 pF

C5

12pF

R8

10

+

C12

22uF

20V

Q2

MGF0909A

D

G

S

C11

.1uF

C10

12 pF

E3 TO FL3

C9

12pF

R11

50

20W

0°

90°

CP2

1X603

ISO

IN

C5

12pF

Q1

MGF0909A

D

G

S

C16

12pF

R5

10

C1

12 pF

+ C13

22uF

20V

C14

.1uF

C15

12 pF

E4 TO FL2

R12

50

20W

R13

50

20W

C19

.1uF

CP3

C18 pF

R14

10

C17

12pF

E5

TO FL8, E6

C20

1pF

C21

1.2pF

C22

12pF

R15

10

G

D

S

G

Q3

FLL310IQ-3A

C24

.1uF

C23

12 pF

C41

.1uF

C40

12 pF

C59

.1uF

C58

12 pF

E6

TO E5

C36

.1uF

CP4

E9

TO E10, FL6

C37

12 pF

R16

10

C38

12pF

C42

1pF

C39

12pF

C43

1.2pF

R17

10

G

D

S

G

Q4

FLL310IQ-3A

E10

TO E9

E13

TO E14, FL5

C54

.1uF

C55

12 pF

CP5

G

D

C56

12pF

C60

1pF

C57

12pF

C61

1.2pF

R19

10

S

G

Q5

FLL310IQ-3A

E14

TO E13

VALUE OF R20 & R21 TO BE

DETERMINED BY

TEST DEPARTMENT

R21

R20

NC

1

2

3

4

U1

LM56

6

5

8

7

C35

.1uF

NC

NC

FL11

FL10

TO E8 FL9

E8

TO E7, FL9

C30

1.5pF

C29

12pF

C31

.6pF

C28

12pF

C34

12 pF

C33

.1uF

+

C32

22uF

20V

T1

E15

TO E8

E12

TO E11, FL7

C44

1.5pF

C50

12pF

C45

.6pF

C49

12pF

C51

12 pF

C52

.1uF

+

C53

22uF

20V

T2

E11

TO E12

E16

TO E15, FL4

C62

1.5pF

C68

12pF

C63

.6pF

C67

12pF

C69

12 pF

C70

.1uF

+

C71

22uF

20V

T3

E15

TO E16

C27

12 pF

C26

.1uF

+

C25

22uF

20V

C48 pF

C47

.1uF

+

C46

22uF

20V

C66

12 pF

C65

.1uF

+

C64

22uF

20V

TO E5 FL8

TO E12 FL7

TO E9 FL6

+5V

+5V R25

1.8K

C72

.1uF

6

R24

10K

7

4

U2

AD817

-

+

3

2

R26

1K

1/4W

R27

1.2K

3

MC7805

IN 1

GND

2

CR5

MMBD914

C79

.1uF

R43

.25

20W

C73

.1uF

CR4

MMBD914

R44

.25

20W

-5V

+5V

C74

.1uF

6

7

4

U3

AD817

-

+

3

2

R46

1K

1/4W

R47

1.2K

J3

OUT

J6

+12V

TO E13 FL5

C75

.1uF

-5V

+5V R30

1.8K

C76

.1uF

6

R29

10K

7

4

U4

AD817

-

+

3

2

R31

1K

1/4W

R32

1.2K

CR3

MMBD914

R45

.25

20W

C77

.1uF

-5V

R22

50

20W

TO E16 FL4

TO E3

R23

50

20W

TO E4

FL3

FL2

-5V

TO E9

FL1

CR2

MMBD914

R38

1.5

20W

+12V

J2

RF OUT

-5V

CR1

MMBD914 20W

Q6

IRML2803

D

G

R34

10K

S

R33

1K

+12V

R36

27K

R35

10K

IRML2803

G

D

S

Q7

MC79M05DT

3 OUT

U7

IN 2

GND

1

R41

12K

R39

10K

R42

1K

8

9

10

11

NC

13

14

+ -

+

C78

.1uF

3

+ -

+ -

7

6

5

4

2

1

U6

12 LM339

J4

NC

NC

GOOD=OPEN

FAULT=GND

J5

-5V STATUS

OPEN=GOOD

J7

-12V

IN

ECN DATE

NEXT ASSY:

BY

VERSION

MODEL

SCALE


DECIMAL .XX

.XXX

-+

-+

FRACTIONAL

-+ 1/64"

ANGULAR

-+ 1/2 DEG

.010

.005



DRAFT 7-24-06 CTT

DR. CHK

M. ENGR

E. ENGR

RELEASE

CHK CHK

APPV'L

SCHEMATIC DIAGRAM,

12.5 WATT

AMPLIFIER

SHEET

50531002A

1

OF

1





Figure 18: 12.5 Watt Amplifier, Component Layout

Page 91





Page 92

Figure 19: Metering Detector, Schematic Diagram

J3


U4 CR2 R16 C14 FB1 JP2 E2


+5V

J1

FORWARD SAMPLE

E1

R1

R2

R3

C1

100pF

3

VPOS

IREF

1

2

RFIN

U1

AD8361

FLTR

6

SEE TAB BLOCK

4

PWDN

7

VRMS

SREF

8

COMM

5

C3

680pF

C2

.1uF

+5V

J2

REFLECTED SAMPLE

E2

R9

R10

R11

C7

100pF

3

VPOS

IREF

1

2

RFIN

U3

AD8361

FLTR

6

SEE TAB BLOCK

4

PWDN

VRMS

7

SREF

8

COMM

5

C9

680pF

C8

.1uF

R4

10K

3

2

+

U2

AD823AR

-

R5

10K

1

1

2

CR1

MMBD914

3

R6

470K

JP1

SEE NOTE-2

C4

.22uF

R12

10K

3

2

+

U4

AD823AR

-

R13

10K

1

1

2

3

JP2

CR2

MMBD914

R14

470K

C10

.22uF

+5V

R7

2.2M

5

6

+

U2

8

AD823AR

4

C5

.1uF

7

R8

1K

NOTES :

1-COMPONENTS J1, 2, 3, ARE NOT LOCATED

ON PC BOARD.

2-FOR ANALOG OPERATIONS SHUNT IS ON

PINS 1 AND 2. FOR DIGITAL MOVE SHUNT

TO PINS 2 AND 3, JP1,JP2. THIS IS TO BE

DETERMINED BY THE TEST DEPT.

+5V

R15

2.2M

5

6

+

U4

8

AD823AR

4

C11

.1uF

7

R16

1K

C12

.1uF

C5

.1uF

J3

5

FORWARD POWER

OUT

4

GND IN

NC

2

NC

1

REFLECTED POWER

OUT

+5V

C13

.1uF

FB1

C14

.1uF

3

+5V IN

TABULATION BLOCK

R1, R9

R2, R10

R3, R11

1KW

68

150

33

2KW

390

12

75

53 11-9-00

52 10/3/00

ECN DATE

NEXT ASSY:

VERSION

MODEL

SCALE

CTT

RHD

BY


DECIMAL .XX

.XXX

-+

-+

FRACTIONAL

ANGULAR

-+ 1/64"

.010

.005

-+ 1/2 DEG



RENUMBERED PINS OF J3

DRAFT 7-13-00

DR. CHK

M. ENGR

E. ENGR

RELEASE

7-20-00

5-17-02

CTT

CTT

RELEASED AT REV 53

CTT

CHK CHK

APPV'L

SCHEMATIC DIAGRAM,

METERING DETECTOR

JMJ

CTT

30400038

SHEET 1 OF 1

REV

53





Page 93

Figure 20: Metering Detector, Component Layout





Page 94

CUSTOMER NOTES TO SCHEMATIC DIAGRAMS





Page 95

8 OPERATING MANUAL RELEASE NOTES

Manual Release 1.0

Note 1- This document version was printed before final engineering and production review of the schematic diagrams. The updated diagrams will be available in the next release.

Note 2- Information on the Remote Control/Status board and the associated software is not available in this manual release. This information will be available as an addendum during Q2 of 2007.





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