IFR 2945A Communications Test Set
Manufacturer:
Model:
2945A
Date:
2000
Class:
Type:
SubType:
Communications Service Monitor
Information
Purpose and features
2945A is a portable Communications Service Monitor for carrying out production, routine and
maintenance testing on radio transmitters, receivers and two way radio communication equipment.
The Service Monitor contains modules to provide facilities equivalent to the following
instruments:-
RF
Generator, two audio generators, specialised tones
Generator, RF power meter, modulation
meter, RF
Counter, AF
Counter, AF voltmeter, distortion meter, large screen digital
Oscilloscope,
spectrum
Analyzer and monitoring receiver.
Distortion measuring filters, AF post demodulation filters and IF passband filters, are built in for
inclusion in relevant measurement paths.
The signal obtained from the demodulators, when in Tx test mode, is fed to an AF
Amplifier and
can be monitored on the built-in loudspeaker, on headphones connected to the accessory socket, or
taken from the DEMOD OUT connector to other equipment.
The monitor has a wide range of test capabilities including base station, mobile and transponder
commissioning and servicing, radio telephone system and radio pager testing, as well as production
testing to all of the above.
The selection of a test mode configures the modules into set-ups ready for connection to the
equipment to be tested and produces the appropriate set-up screen on the display. The set-up
screen shows the settings of the active modules, records changes to settings as they are made and
gives readouts of test results both digitally and on barcharts.
The modules of the monitor can each be used to perform as individual test instruments.
A hard copy of most screens can be made to a suitable printer using the screen capture feature.
This is one of the functions accessed after pressing the [DISPLAY HOLD] key on the front panel.
See Front panel layout, DISPLAY HOLD key, in Chapter 3.
A memory facility allows instrument settings and test results to be stored within the instrument.
With the memory card option fitted, these can be stored on memory cards. This also allows
settings to be exchanged between instruments.
The memory card option also includes a real time clock which provides date/time stamping to
stored results and to screen-capture printouts.
The RS232 control facility permits operation of the instrument by remote or automatic control as
an alternative or supplement to the conventional front panel local control.
IEEE 488.2 GPIB remote control is available as an option.
RS232 and GPIB control facilities are detailed fully in the Programming Manual supplied.
The test modes are outlined in the following descriptions, with interconnection diagrams showing
the principles of the test procedures.
Manual type:
User Manual
Pages:
249
Size:
2.16 Mbytes (2267487 Bytes)
Language:
english
Revision:
3
Manual-ID:
46882-311
Date:
2000 03 27
Quality:
Electronic document, no scan, very well readable.
Upload date:
2020 12 28
MD5:
e9bc0bae35e3c4630362de3abe8567e2
Downloads:
260
Information
About this manual
This manual explains how to use the Communications Service Monitor
2945A, It applies to
instruments fitted with main
Software version 4.xx and cellular
Software version 4.xx.
Intended audience
People who need to test mobile radio systems and associated equipment.
Structure
Chapter 1
General information and performance specification.
Chapter 2
Gives installation instructions, including connection of peripheral equipment.
Chapter 3
Operating instructions. Setting up and use.
Chapter 4
Brief technical description.
Chapter 5
Acceptance testing procedure for the Service Monitor.
Appendix A
Use of the Directional Power Heads, 54421/002 and 54421/003.
Appendix B
Use of the Light-weight Directional Power Heads 54421/016 and 54421/018.
Manual type:
Service Manual
Pages:
546
Size:
14.18 Mbytes (14872454 Bytes)
Language:
english
Revision:
5
Manual-ID:
46882-310
Date:
2002 12 23
Quality:
Scanned document, all readable.
Upload date:
2020 12 30
MD5:
48aa3dc2d714700673403c9246efa240
Downloads:
882
Information
This manual provides servicing information to component level for the Communications
Service Monitors
2944 and
2945A and for the Avionics Communication Service
Monitor
2946A,
Chapter 1 Technical description
This includes block diagrams and detailed board circuit descriptions. The circuit
descriptions refer directly to the servicing diagrams contained in Chapter 7.
Chapter 2 Access and layout
Refer to this chapter for board and unit access, service policy and routine safety
testing and inspection.
Chapter 3 Adjustment and calibration
Refer to this chapter for information on user calibrations,
Software calibrations and
hardware adjustments.
Chapter 4 Initial repair
This chapter contains information regarding simple fault-finding.
Chapter 5 Fault finding
The information in this chapter is in now chart form, giving several levels of fault
diagnosis information from very basic repair down to board component level.
Chapter 6 Replaceable parts
Contains board component parts and a section on miscellaneous (including
mechanical) parts.
Chapter 7 servicing diagrams
Contains interconnection drawings, board circuits and board component layout
drawings.
Appendix A Module identification
Contains cross-references for module designations and IFR part numbers.
Comments