Aeroflex | 2946A | the Aeroflex-IFR-Marconi 2946A datasheet.

Test Equipment Solutions Datasheet
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Avionics Communications Service Monitor
Aerospace
2946A
Communication and
ramp testing of military
and commercial aircraft in
one instrument
Comprehensive Radio
Communication Test Set
Full span spectrum analyzer with
offset tracking generator
Avionics modes for ILS, VOR,
marker beacons and SELCAL
Displays in avionics terms: SDM,
DDM, Bearing and TO and FROM
Extensive pre-sets for avionics
functions DDM and Bearing
Auto increment of VOR Bearing for
aircraft display testing
DC operation from aircraft power
supplies or internal batteries
Avionics testing in both Direct and
‘Off Air’ configurations
The 2946A Communications Service
Monitor is the lightest, most rugged service
monitor available with a full performance
spectrum analyzer as standard. For field
work, the 2946A provides an excellent
combination of instruments for all types of
maintenance work. In the workshop, it
provides all of the performance you would
expect for exacting measurements.
Avionics Systems Test Facility
The 2946A provides an impressive
range of features for the aircraft and
avionics maintenance industry.
In addition to the features provided by
the general purpose 2945A, the dedicated
2946A Avionics Comminucations Service
Monitor provides signals for testing the
following: ILS receivers for localizer,
including identification, glidescope and
markers; VOR beacon receivers, with
identification; SELCAL selective calling
receivers.
The
2946A
screen
gives
a
representation of the aircraft’s display in
each mode, with the effective test signal
parameters clearly indicated both
diagramatically
and
numerically.
Parameters can be altered in steps or
continuously.
Field Operation
At under 12 kg, the 2946A lightens the
load to remote sites. The shape of the
2946A is ideal for carrying. The side
handle ensures that the instrument is clear
of the stairs when ascending buildings and
the depth is suitable for the 2946A to be
operated comfortably when it is placed on
the floor.
An optional bail arm is also available.
This option allows a stowage cover to be
fitted over the front panel for storage of
adapters and further protection to the
instrument’s front panel. Full operation is
possible from the protective “ever-ready”
case so that your investment is protected
from transit damage.
Battery - carry a spare
The battery fits neatly into the
“ever-ready” case and is easily replaced
with a spare when discharged. There is no
memory effect associated with the battery,
even when partially discharged.
Fast Warm Up - fast results
The standard TCXO allows results to be
made reliably within a minute of switch on.
(Where even better stability is required, an
optional OCXO is available)
Stored settings may be recalled from
internal memory or from a memory card,
allowing fast and straightforward setting
up.
Can be operated from ‘ever-ready’ case
Fast Full Performance Spectrum
Analyzer - provided as standard
The spectrum analyzer provides spans
from 100 Hz per division to full span and
also has a fully adjustable reference level.
Speed is comparable with analog
analyzers, allowing real time adjustments
over a full 80 dB dynamic range. With the
tracking generator provided as standard,
duplexers and filters can be aligned quickly
and easily. An offset facility provides
testing of equipment with frequency
translation. Channel stepping can be
performed by defining an increment and
then using the FREQ ↑↓ keys. This is
particularly useful when testing multichannel systems.
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2946A
1
2946A
protocol that the radio would see from the
real network. This allows calls to be set up
and handled enabling receiver and
transmitter parametric measurements to
be made.
Live Look and Listen
This feature puts the 2946A above all of
its peers with the ability to examine signals
on the screen and demodulate them
simultaneously. Intermittent interference
can be isolated quickly and the signals
then easily identified. The trace can be
saved to memory card along with the time
and date, providing factual evidence that
can be recalled later. This feature is
particularly useful when looking for rogue
transmissions, especially on busy base
station sites.
From 2 µV to 150 Watts
The 2946A will measure the power of
low level signals such as those
encountered when monitoring off-air
signals or those found when probing a
circuit.
150 Watts measurement is
provided without the need for external
attenuators, so high power base stations
can be measured directly. Measurement
accuracy of better than 10% is guaranteed
all the way down to 5 mW on the N-Type
connector, allowing cellular radios to be
qualified at low power levels.
Accurate RF Signals
The signal generator provides coverage
from 400 kHz to 1.05 GHz with +5 dBm
output (+7 dBm overrange) and fast
switching speed. Level accuracy is ±2 dB
at all levels above -127 dBm.
Duplex - provided as standard
Full duplex operation is provided by the
2946A. This allows testing of duplex radios
as well as simultaneous testing of repeater
transmit and receive paths. There are no
restrictions to the duplex offset.
Cellular and Trunking - built in
AMPS, TACS and NMT analog cellular
standards are available internally, with all
country variants provided in each package.
MPT 1327/1343 trunking system and
variants of it are also available.
A new trunking capability has been
added with the introduction of EDACS
Radio and Repeater test capability.
Remote control of the inbuilt tests is
provided, so that measurements can be
started and results logged automatically.
Network Simulation
The 2946A simulates the signaling
2
2946A
Remote Control - RS-232 or GPIB
Remote control is provided with an
RS-232 interface as standard. An
IEEE488.2 interface (Option 5) can be
fitted where other instruments are required
to operate in a system with the 2946A.
Printing Made Easy
With the parallel printer port interface,
screen dumps, automatic test results or
previously stored results may be sent to
any parallel printer. These facilities are
available as standard using the serial
RS-232 interface.
Autorun - internal control
With the (optional) Analog Systems Card
fitted, automatic testing without an Ideal
external controller is possible. Custom
tests may be written and run by the
operator.
Four programmable relay
contacts are provided with the optional
parallel printer interface to allow remote
control of radios or test fixtures from
built-in automatic tests.
Custom Programs
Users may program the instrument to
suit their own specific needs. This is
possible either by configuring any of the 4
built-in programs or by using the MIBASIC
interpreter to produce a customized test
program that can be executed internally,
without an external controller.
Memory Card - with real time clock
The Memory Card Drive meets the
PCMCIA standard format for PC cards. The
2945A provides a DOS based filing system
that allows transfer of information to a PC
fitted with a memory card slot.
Test set ups, test results, screen dumps,
spectrum analyzer co-ordinates and test
sequences can all be stored on the
memory card, allowing information to be
easily stored and retrieved when required.
Reliability
The 2946A features high integration
and a rugged chassis design to maximize
mechanical protection.
Audio Analysis
A comprehensive range of filters are
provided as standard, including band pass,
low pass and high pass. Optional filters are
available for psophometric weighting of
audio signals and demodulation of signals
in a simulated radio channel bandwidth.
The direct measurement of CTCSS is
possible with the 300 Hz LP filter, even with
speech present.
Two comprehensive audio generators
are provided as standard for internal
modulation or audio sources for transmitter
stimulus.
External DC coupled FM is provided.
Comprehensive Oscilloscope
Analysis of audio signals, whether from
the demodulated signal or the audio input
direct, can be viewed for further inspection.
The oscilloscope can either be combined
with the measurement screen in the Tx, Rx
or AF test modes or ‘zoomed’ to a full
screen display.
Different levels of
persistence can be selected to allow short
or long term effects to be captured.
Transient Analysis
The ability to capture transients on the
rising or falling edge of a waveform
provides a valuable tool for fault finding
radios and radio systems. The user has full
control of the trigger level and input
attenuation as well as the timebase and
five fixed trigger points, making this feature
simple and flexible to operate.
Harmonic Analysis
An automatic harmonic analysis
function is included in the 2946A. This
complements the fast spectrum analyzer
and allows a rapid check that the
transmitter is not producing any large
harmonics.
Tones Generation and Decoding
The tones menus now include full
remote control so that radio workshops can
further automate their tasks. These and
other improvements are in response to
user feedback and allow better control of
the tones from the top level screens.
POCSAG Decode - built in option
Off-air decoding of POCSAG signals is
provided as an option. This allows tone,
numeric and alphanumeric signals to be
displayed. Signals with bit rates of up to
4800 bits/s can be automatically detected
making the 2946A an ideal surveillance
tool. The 2946A can be set to detect all
messages, a user selectable RIC (just like
a Pager), or a fixed message string.
Specification
Avionics Systems
The Avionics feature provides amplitude modulated
signals suitable for testing of Instrument Landing
Systems (ILS) and VHF Omnidirectional Radio range
(VOR) receivers.
ILS MODE
Sum of Depth of Modulation (SDM)
0-90% glideslope, 0-50% localizer in 0.1% steps
representing the arithmetic sum of each tone depth
Selection
Keyboard entry
Accuracy of SDM
±5% of setting for carrier frequencies up to
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400 MHz
Difference of Depth of Modulation (DDM)
0-45% glideslope, 0-25% localiser in 0.1% steps
limited by SDM
Selection
Keyboard entry and variation of rotary control
Localiser Presets
0, 4.6, 9.3 and 15.5% DDM
Indication
10 digit display
Setting
Keyboard entry, delta increment/decrement function
and rotary control
Accuracy
As frequency standard
Accuracy
For carrier frequencies from 1.5 MHz to 400 MHz
± 7% ± 1digit for modulation frequency of 1 kHz.
± 10% ± 1 digit for modulation frequencies from
50 Hz to 5 kHz.
±15% ±1 digit for modulation frequencies from
50 Hz to 15 kHz.
Distortion
Less than 2% at 1 kHz for 30% AM, CCITT weighted
OUTPUT LEVEL
Output Level Range
Rx Test:
N-Type socket: -141 dBm to -21 dBm
BNC socket: -115 dBm to +5 dBm
(overrange to +7dBm)
Modulation Frequency
20 Hz to 20 kHz
AMPLITUDE MODULATION - EXTERNAL
Input Impedance
Nominally 10 kΩ in parallel with 40 pF
Frequency Range
As internal AM
Modulation Frequency Range
As internal AM
Sensitivity
1 V RMS for 100% AM
Glideslope Presets
0, 4.5, 9.1 and 17.5% DDM
FREQUENCY MODULATION - INTERNAL
Frequency Range
400 kHz to 1.05 GHz
Accuracy of DDM
At 0 dBm 0.001 DDM (20% depth)
Maximum Deviation
75 kHz
Tone Frequencies
90 Hz and 150 Hz (either tone can be suppressed)
Resolution
0.1 dB
Additional Modulation
1020 Hz ident signal available on 0 DDM on ILS
from an internal modulation source
Indication
4 digits plus sign (dBm, dBµV, µV, mV PD/EMF)
VOR MODE
9.96 kHz Sub-Carrier Range
0-99.0% in 0.1% steps
Modulation
FM by a 30 Hz tone with 480 Hz deviation
30 Hz Tone Range
0-99% in 0.1% steps
Bearing Control
Relative phase of the 30 Hz tone and sub-carrier
modulation adjustable from 0 to 360° in 0.1° steps
by entering VOR bearing. Bearing can be entered as
TO or FROM the beacon.
Accuracy
±2 dB for level above -127 dBm on N-Type socket
up to 1 GHz
Reverse Power Protection
N-Type: 50 W continuous, normal operation. 150 W
for 1 minute at 20 °C.
Overload indicated by audible and visual warning.
BNC: 5 W Overload indicated by audible and visual
warning.
Output Impedance
Nominally 50 Ω
N-Type
Better than 1.2:1 up to 500 MHz
Better than 1.35:1 up to 1.05 GHz
Bearing Accuracy
±0.5°
BNC
Better than 2.2:1 up to 1.05 GHz
Additional Modulation
Ident signal (1020 Hz). Available on 0° bearing from
an internal source
SPECTRAL PURITY
(If you require even better spectral purity than that
specified here, please consider the 2948)
Residual FM
Less than 15 Hz RMS (0.3 to 3.4 kHz) up to
500 MHz
Less than 20 Hz RMS (0.3 to 3.4 kHz) up to
1.0 GHz (with OCXO)
Harmonics
Better than −20 dBc
Data Entry
By table selection of 2 pairs of characters
labelled ‘A’ to ‘S’
Timing
1 s tone duration, 250 ms gap
MARKER BEACON MODE
Provides default modulation of 95% AM depth on a
75 MHz carrier at the rate of 400 Hz (outer
beacon), 1.3 kHz (middle beacon) or 3 kHz (inner
beacon). AM depth, carrier frequency and
modulation frequencies can be changed from default
values.
RF Signal Generator
FREQUENCY
Frequency Range
400 kHz to 1.05 GHz
Resolution
10 Hz
Setting
Keyboard entry, delta increment/decrement function
and rotary control
Accuracy (1)
±5% ± 10 Hz at 1 kHz modulating frequency.
±10% at modulating frequencies from 50 Hz to
15 kHz.
Distortion
Less than 1% at 1 kHz for deviation of 5 kHz, CCITT
weighted
Modulation Frequency Range
20 Hz to 25 kHz
VSWR
Automatic VOR Test
Bearing automatically increments in 0.1° steps
SELCAL MODE
Provides amplitude modulation with SELCAL tones
Indication
3 digits
Spurious Signals
Better than −30 dBc (±10 kHz to 1.5 MHz offset
from carrier frequency or over range 600 to
700 MHz).
Better than −40 dBc from 400 kHz to 1 GHz
Resolution
25 Hz
Pre-emphasis
750 µs selectable
FREQUENCY MODULATION - EXTERNAL
Input Impedance
Nominally 10 kΩ in parallel with 40 pF
Frequency Range
As internal FM
Modulation Frequency Range
DC to 100 kHz
Pre-emphasis
750 µs selectable
Sensitivity
1 Volt RMS for 0 to 75 kHz deviation
MICROPHONE INPUT
Input Level
2 mV to 200 mV (AGC levelled)
SSB Phase Noise (20 kHz offset)
Better than -95 dBc/Hz up to 1 GHz
Input Impedance
Nominally 150 Ω
RF Carrier Leakage
Less than 0.5 µV PD generated in a 50 Ω load by a
2 turn loop 25 mm from the case. Output level less
than −40 dBm into a sealed 50 Ω load.
Press To Talk (PTT)
When using the optional microphone in Tx Test
mode, the PTT will switch instrument to Rx Test.
AMPLITUDE MODULATION - INTERNAL
Input Impedance
Nominally 1 MΩ in parallel with 40 pF
Frequency Range
400 kHz to 1.05 GHz
Audio Voltmeter
Frequency Range
DC and 20 Hz to 50 kHz
AC only 20 Hz to 50 kHz
AM Depth Range
0 to 99%
Level Ranges
0 to 100 mV to 0 to 100 V RMS in a 1, 3, 10
sequence.
Digital readout also in mW (user selectable)
Resolution
1%
Indication
2 digits
Setting
Keyboard entry, delta increment / decrement
function and rotary control
3
Resolution
1 mV or 1% of reading
Indication
3 digits and bar-chart
2946A
Special Features
Built in anti-aliasing circuitry
Audio Frequency Meter
Audio Bar-Charts
Maximum Harmonic Frequency
1.05 GHz
Dynamic Range
0 to −60 dBc
Frequency Range
20 Hz to 20 kHz
Bar-Chart Displays
AF Voltage, SINAD, Distortion, S/N
Resolution
0.1 Hz, less than 10 kHz
1 Hz, at 10 kHz and above
Vertical Resolution
2% of full scale
Frequency Range
1 to 1050 MHz
Ranging
Autoranging, range hold or manual selection
1, 2, 5, sequence with hysteresis
Dynamic Range
60 dB below spectrum analyzer reference level
Audio and Modulation Filters
300 Hz, 3 kHz, 15 kHz Lowpass
300 Hz to 3.4 kHz Bandpass
300 Hz Highpass
750 µs de-emphasis
50 kHz LP (No filter selected)
Scale (time)
50 µs/division to 5 s/div
Indication
5 digits
Accuracy
As frequency standard ± 1 digit ± resolution
Sensitivity
50 mV
Audio Sinad Meter
Audio Analyzer General Features
Tones Mode
Frequency
1 kHz
RF Frequency Meter
Range
0 to 18 dB and 0 to 50 dB
Resolution
0.1 dB
Frequency Range
100 kHz to 1.05 GHz (manual tune)
10 MHz to 1 GHz (autotune)
Indication
3 digits and bar-charts
Resolution
1 Hz or 10 Hz, selectable
Accuracy
± 1 dB
Indication
Up to 10 digits
Sensitivity
50 mV (100 mV for 40 dB SINAD) reading
suppressed if audio voltage is less than 5 mV
Accuracy
As frequency standard ± resolution
Audio Distortion Meter
Frequency
1 kHz
Range
0 to 10%, 0 to 30% and 0 to 100%
Resolution
0.1% distortion
Indication
3 digits and bar-charts
Accuracy
± 5% of reading ± 0.5% distortion
Acquisition Time
Less than 1 second (manual)
Typically 3 seconds (autotune)
Audio S/N Meter
Frequency Range
200 kHz to 1.05 GHz
Dynamic Range
5 mW to 150 W (N-Type)
0.05 mW to 250 mW (Antenna port)
Indication
3 digits or bar-chart
Indication
3 digits and bar-chart
Resolution
0.1 dB max, typically 1%
Accuracy
±1 dB
Accuracy (N-Type)
±10% ± resolution up to 1 GHz
Sensitivity
50 mV (100 mV for 40 dB S/N) reading suppressed
if audio voltage is less than 5 mV
Maximum Continuous Rating
N-Type: 50 W at 20 °C
Antenna port: 1 W
Intermittent Rating
N-Type: 150 W for limited periods, typically 1 minute
at 20°C. Overload indicated by audible and visual
warning.
Voltage Range
10 mV to 20 V per division in a 1, 2, 5 sequence
AMPLITUDE MODULATION
Modulation Frequency Range
10 Hz to 15 kHz
Resolution
1% AM
Indication
2 digits and bar-chart
Accuracy (1)
±5% ±1 digit at 1 kHz
±8.5% ±1 digit from 50 Hz to 10 kHz
Demodulation Distortion (1)
Less than 2%, at 1 kHz and 30% AM, (CCITT
weighted)
Residual AM
Less than 1% (300 Hz to 3.4 kHz)
Demodulation Output
50 mV peak to peak for 1% AM
FREQUENCY MODULATION
Frequency Range
100 kHz to 1.05 GHz
Modulation Frequency Range
10 Hz to 15 kHz
Deviation Range
0 to 75 kHz
Indication
3 digits and bar-chart
Voltage Accuracy
±5% of full scale
Accuracy (1)
±5% ± resolution at 1 kHz modulation frequency
±7.5% ±1 digit for modulation frequencies 50 Hz
to 10 kHz
FM Ranges
±75, 30, 15, 6, 3 and 1.5 kHz deviation full scale,
±10% accuracy
Graticule
10 Horizontal by 6 Vertical divisions
Audio & Modulation Filters
300 Hz, 3 kHz, 15 kHz Lowpass
300 Hz to 3.4 kHz Bandpass
300 Hz Highpass
750 µs de-emphasis
50 kHz LP (No filter selected)
Resolution
10 Hz below 2 kHz deviation
1% above 2 kHz deviation
Frequency Range
DC to 50 kHz, 3 Hz to 50 kHz AC coupled
Timebase
50 µs/div to 5 s/div in a 1, 2, 5 sequence
Modulation Meter
Sensitivity
Autotuned: 5 mW (N-Type)
0.05 mW (Antenna port)
Manual Tuned:−34 dBm (N-Type)
−60 dBm (Antenna port)
AM Depth Range
0 to 99% (manually tuned)
0 to 90% below 100 MHz
0 to 80% from 100 to 400 MHz
Resolution
0.1 dB
AM Ranges
20, 10 and 5% per division, ±10% accuracy
Pre-trigger
0, 25, 50, 75 or 100% of displayed period
VSWR
N-Type: Better than 1.2:1 up to 500 MHz
Better than 1.25:1 up to 1.0 GHz
BNC: Better than 3:1 up to 1.0 GHz
Indication Units
Watts, dBm or dBW
Operating Modes
Single repetitive sweep
Trigger Level
Adjustable over full dynamic range +ve or −ve trigger
selection
Frequency Range
100 kHz to 1.05 GHz
Range
0 to 30 dB and 0 to 100 dB
Audio Oscilloscope
Scale (power)
10 dB/div
Sensitivity
Autotuned: 5 mW (N-Type)
0.05 mW (Antenna port)
Manual Tuned:−34 dBm (N-Type)−60 dBm (Antenna
port)
RF Power Meter (broadband)
Sensitivity
50 mV (100 mV for 1% distortion) reading
suppressed if audio voltage is less than 5 mV
TRANSIENT POWER ANALYSIS
Displays power profile against time
Aerospace
Accuracy
±3% ±3 mV ± resolution
Harmonic and Transient Analysis
HARMONIC MEASUREMENT
Displays 1st to 5th harmonic of the selected carrier.
Demodulation Distortion
Less than 2% at 1 kHz and 5 kHz FM, (CCITT
weighted)
Residual FM
Less than 30 Hz (300 Hz to 3.4 kHz)
Demodulation Output Socket
200 mV peak to peak ±10% per 1 kHz deviation
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2946A
4
2946A
LEVEL
RF Spectrum Analyzer
Level Range
0.1 mV to 4 V RMS
Frequency Range
100 kHz to 1.0 GHz
Spans
1 kHz/division to 100 MHz/division in a 1, 2, 5
sequence or continuously variable
Start - stop facility allows selection of infinitely
variable span width
Resolution Bandwidth
300 Hz, 3, 30, 300 kHz, 3 MHz
Accuracy
± 5% + resolution 50 Hz to 15 kHz
On Screen Dynamic Range
80 dB
On Screen Linearity
Typically ±2 dB ±1 resolution (10 dB/div) >10 dB
above noise floor
Vertical Resolution
0.1 dB on 2 dB/division
0.5 dB on 10 dB/division
Level Flatness
±1 dB ± resolution over 50 MHz span
Intermodulation Distortion
Better than 70 dB for two signals at −30 dBm into
first mixer
Sweep Speeds
10 ms/div to 200 ms/div in a 1, 2, 5 sequence
(optimum sweep speed and bandwidth selected
according to span or user selectable)
10 kHz
100 kHz
1 MHz
10 MHz
100 MHz
1000 MHz
Resolution
Bandwidth
300 Hz
3 kHz
30 kHz
300 kHz
300 kHz
3 MHz
Indication
4 digits
Resolution
0.1 mV below 409 mV
1 mV above 409 mV
Reference Level (top of screen)
−50 dBm to +52 dBm 0.7 mV to 71 V
Span
Setting
Keyboard entry, delta increment / decrement
function and rotary control
Update
(Sweeps/sec)
5
9
9
9
5
5
Marker Indication
Level and frequency or delta marker from centre line
of screen
Single marker for frequency and level display.
Marker to centre frequency.
∆ marker
Features
Simultaneous ‘Look and Listen’ spans 100 kHz,
200 kHz, 500 kHz, 1 MHz
Start/stop frequency entry
Output Impedance
Nominally 5 Ω (minimum load 25 Ω)
Distortion
Less than 0.5% at 1 kHz
Less than 1% from 50 Hz to 15 kHz
Signaling Encoder/Decoder
Sequential tones functions including revert
User defined tones
Encodes and decodes up to 40 tones.
CCIR, ZVEI, DZVEI, EEA, EIA or user defined.
Any of the tones may be extended.
Continuous, burst and single step modes available.
Up to two frequency plans may be defined and
stored within the 2945A for sequential tones.
Any of the standard tone frequency plans may be
copied to user defined and modified.
Tone length 20 ms to 1 s.
Standard tone frequencies may be selected from a
menu.
Generation and decoding of DTMF tones.
Generation and decoding of DCS (Digitally Coded
Squelch).
Generation of POCSAG code CCIR No.1 Rec 584.
Bit rates from 400 to 4800 bit/s. Inversion
available.
AUDIO MONITOR
Demodulated signals and audio signals may be
monitored via the internal loudspeaker and the
accessory socket output on the front panel.
Cellular and Trunking
Test Modes
Auto test/manual test
Auto Test Programs
Call processing only
Call and RF testing
Brief testing
Comprehensive testing
Parametric Auto Test Routines
AF Frequency
AF Level
FM Deviation
Mod frequency
Rx Distortion
Rx expansion
Rx sensitivity
Rx SINAD
Rx S/N
Tx Compression
Tx Distortion
Tx frequency
Tx Level
Tx Power Level
Tx Limiting
Tx Mod Level
Tx Noise
Tx SINAD
Tx S/N
Sensitivity
2 µV
Tracking Generator Offset
0 to 999 MHz
Audio Generators
FREQUENCY
Frequency Range
10 Hz to 25 kHz (sine or square)
Setting
Keyboard entry, delta increment / decrement
function and rotary control
Indication
5 digits
Resolution
0.1 Hz below 3.25 kHz
1 Hz above 3.25 kHz
Signaling Auto Test Routines
Registration/Roaming Update
Place Call
Page Mobile
Clear from Land
Clear from Mobile
Handoff
Hook Flash
DTMF Decode
Data Performance
PTT On
PTT Off
SAT Deviation
SAT Frequency
ST Duration
ST Frequency
ST Deviation
DSAT Deviation
Frequency Standard
Ageing Rate
Better than 1 ppm per year
Warm up
1 minute to specified accuracy
External Frequency Standard Input
Frequency
1, 2, 5 and 10 MHz
Input Level
Greater than 1 V peak to peak
Input Impedance
Nominally 1 kΩG
General
Keyboard and Display
Logical colour coded keyboard with bright high
resolution fast LCD
Display Size
160 x 85 mm
RS-232C
RS-232C interface is provided for printing and
remote instrument control
Connector
9 way female ‘D’ Type
POWER REQUIREMENTS
AC Supply Voltage
90 to 265 V
AC Supply Frequency
90 - 264 V
45 Hz to 67 Hz
90 - 132 V
45 Hz to 440 Hz
Maximum AC Power
190 VA
DC Supply Voltage
11 to 32 V
Maximum DC Power
100 W
Charge Output
13.8 V at 6 A max to charge a 12 V sealed lead
acid battery.
Electromagnetic Compatibility
Conforms with the protection requirements of
Council directive 89/336/EEC.
Complies with the limits specified in the following
standards:
EN55011 Class B
CISPR 11
EN50082-1
IEC 801-2, 3, 4
EN60555-2
IEC 555-2
Safety
Complies with IEC 1010-1, BS EN61010-1 for class
1 portable equipment and is for use in a pollution
degree 2 environment. The instrument is designed
to operate from an installation category 1 or 2
supply.
Approved to UL3111-1
ENVIRONMENTAL
Rated Range of Use
0 to 50°C and up to 95% relative humidity at 40°C
Storage and Transport
Temperature
−40 to +71°C
Altitude
Up to 2500 m (pressurized freight at 27 kPa
differential)
DIMENSIONS AND WEIGHT
Height
178 mm (7 in)
Width
380 mm (15 in)
Depth
457 mm (18 in)
(including handle, feet and covers)
Weight
Less than 11.4 kg (<25 lb)
Options and Accessories
Internal Frequency Standard (TCXO)
Accuracy
0.01 Hz below 180 Hz, 0.1 Hz above 180 Hz
5
2946A
Frequency
10 MHz
Temperature Stability
Better than 0.5 ppm, 0 to 50°C
600 Ω MATCHING UNIT (OPTION 1)
Switchable 600 Ω balanced audio input and output
Switchable 20 dB attenuator on AF generator output
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2946A
ANALOG SYSTEMS CARD (OPTION 2)
This option provides automatic testing for
cellular,trunked and FM radio’s and a BASIC
Interpreter for customised tests.
HIGH STABILITY INTERNAL FREQUENCY (OCXO)
STANDARD (OPTION 3)
Frequency
10 MHz
Temperature Stability
Better than 0.05 ppm, 5 to 55°C
Ageing Rate
Better than 0.1 ppm, per year, after 1 month
continuous use
Warm-up Time
Less than 10 minutes to within 0.2 ppm at 20°C
PARALLEL INTERFACE (OPTION 4)
Allows direct connection of a parallel printer.
Additionally provides 4 software programmable
output lines.
Printer Port
Connector
25 way female D type
Printers Supported
75, 100, 150 dots per inch laser printers, FX 80,
FX 100 Epson format
Accessory Port
Connector
9 way female D type
Outputs
4 independently programmable output lines, each
one configurable as a logic line or as a relay contact
closure. +5 V supply available.
GPIB (OPTION 5)
Capability
For printing, remote instrument control or for
programming of user defined test sequences.
Complies with the following subsets defined
IEEE488:SH1, AH1, T6, L4, SR1, RL1, DT0, EI, DC1
MEMORY CARD DRIVE AND REAL TIME CLOCK
(OPTION 6)
The memory card facility allows the storage of
results, set-ups screen dumps and user programs
with SRAM cards. Meets PCMCIA 2 standard.
Allows the current date and time to be stored with
results to the memory card and/or printed with a
screen dump.
SSB DEMODULATOR (OPTION 8)
The SSB demodulator allows signals to be
demodulated either via the internal loudspeaker or
via the accessory socket. Provides demodulation of
SSB signals(upper and lower sideband)
Frequency Range
400 kHz to 1 GHz
AF Demodulation Range
10 Hz to 15 kHz
Distortion
Typically less than 3% at 1kHz (300 to 3.4 kHz)
Detection Range
2 µV to 150 W
Features
Automatic detection of USB or LSB. BFO can be
used for tuning of carrier for AM and FM radio’s.
NMT CELLULAR SOFTWARE (OPTION 10)
NMT 450
NMT 900
Benelux
NMTF
Austria
Spain
Malaysia
Indonesia
Saudi 1
Saudi 2
Thailand
Oman
Tunisia
Hungary
Poland
Russia
Czech
Bulgaria
Slovenia
Turkey
USER DEFINED NMT
AMPS CELLULAR SOFTWARE (OPTION 11)
USER DEFINED AMPS
TACS CELLULAR SOFTWARE (OPTION 12)
E-TACS
TACS 2
C-TACS I
C-TACS II
J-TACS
N-TACS
USER DEFINED TACS
MPT 1327 TRUNKING
BAND III
UK WATER
AUTONET
MADEIRA
NZ MPT1327
USER DEFINED MPT
SOFTWARE (OPTION 13)
JRC
HONG KONG
AMT
NL-TRAXIS
PH-INDO
PMRTEST SOFTWARE (OPTION 14)
USER DEFINED PMR for FM radio’s
 RADIO TEST SOFTWARE (OPTION 15)
EDACS
Provides Auto/ Manual test capability for EDACS
radios. Up to 4 User defined variants can be
created and stored, each with up to 24 spot
channel frequencies.
Performs bit error rate tests to check performance of
receiver and transmitter.
 REPEATER TEST SOFTWARE (OPTION 16)
EDACS
Provides Auto/Manual test capability for EDACS
repeaters. Up to 4 User defined variants can be
created and stored, each with up to 24 spot
channel frequencies. A data logging facility is also
available to continuously decode and display data
messages from the repeater under test.
EDACS is an Ericsson GE registered trademark.
IFR Ltd is an EDACS trunking licensee.
DEMODULATION FILTERS (OPTION 21)
Provides a range of high selectivity channel filters in
Spectrum Analyzer Look and Listen mode. Shape
factor approximates to ETSI requirements.
Bandwidths
5 kHz, 12.5 kHz, 25 kHz, 50 kHz and 300 kHz
POCSAG DECODE (OPTION 22)
Allows off-air decoding of POCSAG messages. Can
decode a message as it is received, or decoding can
be triggered from a user selectable RIC code or fixed
message pattern.
Bit Rate
Automatically decodes any standard bit rate up to
4800 bits/s. Numeric or alphanumeric decoding is
provided.
Number of received errors is displayed.
CCITT FILTER (OPTION 23)
Allows a CCITT filter to be inserted into either the
demodulated audio path or the audio input path.
CMESS FILTER (OPTION 24)
Allows a CMESS filter to be inserted into either the
demodulated audio path or the audio input path.
BAIL ARM/FRONT COVER (OPTION 30)
Provides a Bail arm carrying handle and front panel
cover and storage area. The Bail arm will also
provide additional viewing angles when mounted on
a bench.
Charge time from instrument
16 hours
Certain characteristics are shown as typical. These
provide additional information for applying the
instrument, but are unwarranted.
Versions and Accessories
When ordering please quote the full ordering number
information.
Ordering
numbers
2945A
2946A
2948
Versions
Communications Service Monitor
Avionics Service Monitor
Low Phase-Noise Communications Service
Monitor
Option 1
600 Ω Matching Unit
Option 2
Analog Systems Card
Option 3
High Stability OCXO
Option 4
Parallel Interface †
Option 5
GPIB Interface †
Option 6
Memory Card Drive with real time clock
Option 8
SSB demodulator
Note Option 2 required when ordering any of the following
options 10 to 16
Option 10
NMT Cellular
Option 11
AMPS Cellular
Option 12
TACS Cellular
Option 13
MPT 1327 trunking
Option 14
PMRTEST
Option 15
EDACS Radio Test
Option 16
EDACSä Repeater Test
Option 21
Demodulation Filters
Option 22
POCSAG Decode
Option 23
CCITT Filter †
Option 24
CMESS Filter †
Option 30
Bail Arm and Front Panel Stowage cover
Supplied Accessories
AC Supply lead
DC Supply lead
Operating Manual
Optional Accessories
44991/145
Microphone with PTT
59000/189
Memory Card (128 k)
43113/021
Battery Pack for 2945A‡
46662/571
‘Ever-Ready’ Case
46662/616
‘Ever-Ready’ Case for use with Option 30
54112/163
Hard Transit case
54431/023
20 dB AF attenuator (BNC)
46884/728
Rack Mounting Kit
54421/001
BNC Telescopic Antenna
46884/650
Serial port to PC control cable (9 way)
46884/649
Serial port to PC control cable (25 way)
46884/648
RS-232 Printer cable (25 way)
54421/016
Fit Fast Installation Tester (70-1000 MHz)
with adapter
59999/170
RF Directional Bridge
54421/002
RF Directional Power Head
54421/003
(1 to 50 MHz) RF Directional Power Head
54432/012
(25 to 1000 MHz) Wideband Amplifier
46880/079
(100 Hz to 500 MHz) Service Manual
†
Options 4 and 5 can not be fitted
together.
Options 23 and 24 can not be fitted
together.
Battery Pack for previous model 2945A is
still available under code 43113/018.
†
‡
(1)
At low modulation levels the residual AM/FM may
become significant.
BATTERY PACK
Type
12 V Sealed lead-acid
Connector XLR Type
Capacity
7 AH (30 minutes operation)
Weight
3 kg (6.6 lb)
IFR Americas, Inc., 10200 West York Street, Wichita, Kansas
67215-8999, USA. E-mail: info@ifrsys.com
Tel: +1 316 522 4981 Toll Free USA: 1 800 835 2352 Fax: +1 316 522 1360
IFR Ltd, Longacres House, Norton Green Road, Stevenage, Herts
SG1 2BA, United Kingdom. E-mail: info@ifrinternational.co.uk
Tel: +44 (0) 1438 742200 Freephone UK: 0800 282 388 Fax: +44 (0) 1438 727601
As we are always seeking to improve our products, the information in this document gives only a general indication of the product capacity, performance and suitability, none of which shall form part of any
contract. We reserve the right to make design changes without notice. All trademarks are acknowledged. Parent Company IFR Systems, Inc. © IFR Ltd. 2000.
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2946A
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Part no. 46891-030
Issue 2
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