Aeroflex 2945A Operation Manual Supplement Download Page 16

EDACS REPEATERS 

2-4 

Selecting the EDACS Repeater system 

The SYSTEM SELECTION MENU lists all of the test systems that are installed in the instrument 
and designates one soft key to each.  To select the EDACS repeater system, press the 

[EDACS 

repeat]

 key.  Variants of the system are selected from the System Parameters menu, using the 

[SYSTEM], 

[EDACS repeat],  [SET-UP]

 sequence. 

With the EDACS 

repeater

 system selected, the six soft keys at the left of the screen are given to 

explicit functions or user operations.  The six keys and the function of each is shown below: 

[SYSTEM] 

System selection menu 

[SET-UP] 

System set-up menus 

[PROGRAM] 

Test program menu 

[AUTO] 

AUTORUN test mode 

[MANUAL] 

Manual test mode 

[DATA] 

Data display screens 

A description of the use of each menu or screen follows.  The headings reflect the menu structure 
to assist in locating a particular key or function. 

Customizing the EDACS Repeater system 

Before you use the Service Monitor for automatic or manual testing, you may need to customize 
the system by changing some of the default test parameters.  You can do this via the 

[SYSTEM]

[SET-UP]

, and 

[PROGRAM]

 keys, as explained in this section. 

[SYSTEM] 

The 

[SYSTEM]

 key brings up the 

SYSTEM SELECTION MENU

, allowing access to all of the test 

systems that are installed in the Service Monitor and an option 

[no system]

 to disable the selected 

system prior to leaving the Systems mode.  The 

[more]

 key toggles between the two displays of 

system type keys. 

[SET-UP] 

The 

[SET-UP]

 key allows access to all of the set-up menus for the EDACS repeater system.  

There are four menus that allows access to the parameters of the system, each dealing with a 
different aspect of the system.  These are: 

SYSTEM PARAMETERS

 

RADIO PARAMETERS

 

AUTORUN CONTROL

 

AUTORUN PARAMETERS

  

Pressing 

[SET-UP]

 repeatedly, toggles through all four menus. 

The four menus are: 

SYSTEM PARAMETERS

 

Allows adjustments to control channel number, polarity etc. 

RADIO PARAMETERS

 

Allows you to change or enter the logical and group identity 
numbers used by the Service Monitor, and the logical identity of 
any radio used with the Service Monitor. 

AUTORUN CONTROL

 

Allows you to select the format of the test results displayed, the 
conditions that cause the test program to halt for user attention 
and to switch the print mode on or off.  

AUTORUN PARAMETERS

 

Allows you to edit the parameters of each of the tests available in 
the test programs. 

Summary of Contents for 2945A

Page 1: ...COMMUNICATIONS SERVICE MONITORS 2945A 2945B 2946A 2948 2948B for EDACS Repeaters Operating Manual Supplement Document part no 46892 300 Issue 4 19 April 2007...

Page 2: ...transmitted in any form or by any means electronic or mechanical including photocopying or recorded by any information storage or retrieval system without permission in writing by Aeroflex Internatio...

Page 3: ...s manual Hard key titles are shown verbatim using normal lettering in square brackets Tx TEST Soft key titles are shown verbatim using italic lettering in italic square brackets Tx freq Titles shown o...

Page 4: ...SYSTEMS mode selection 2 2 Selecting the EDACS Repeater system 2 4 Customizing the EDACS Repeater system 2 4 Test details 2 12 Selecting the AUTORUN test program 2 20 Making tests on repeaters 2 20 Da...

Page 5: ...ate on the EDACS system The Service Monitor and the repeater are connected using either suitable RF cables for connecting to the antenna sockets of the repeater or to an aerial for testing off air AF...

Page 6: ...e Monitor via the GPIB or RS232 interface Pause facility A feature of the AUTO mode is the pause facility This allows you to select the conditions under which the test program pauses The options are A...

Page 7: ...em parameter settings System type As selected Default Repeater 1 Control channel 1 to 24 system dependent Default 1 Tx Polarity AUTO NORMAL or INVERTED Default AUTO Radio parameter settings Testset lo...

Page 8: ...generator level 30 dBm RFGENLEVEL expr units Timeout 30s TIMEOUT expr units Use accessory port ON USEACCPORT ON OFF Set accessory port logic 2 ACCPORT LOGIC0 1 2 3 Call from Testset TEST TESTSETCALL...

Page 9: ...0 3 3 4 kHz BP TXFILTER NONE LP15KHZ LP300HZ STDBP CCITT CMESS Lower limit 30 dB LOWER expr units Transmitter RF power TEST TXLEVEL Status ON STATUS ON OFF Averages 5 AVERAGES expr Upper limit 50W UPP...

Page 10: ...RLOAD expr units Upper limit 2 5 kHz UPPER expr units Tx compression TEST TXCOMPRESS not normally used in EDACS Status OFF STATUS ON OFF Averages 5 AVERAGES expr Modulation level 1 5 kHz MODLEVEL expr...

Page 11: ...us ON STATUS ON OFF Averages 5 AVERAGES expr Modulation level 1 5 kHz MODLEVEL expr units Rx filter CMESS RXFILTER NONE LP15KHZ LP300HZ STDBP CCITT CMESS RF upper limit 113 dBm UPPER expr units Refere...

Page 12: ...TEST TESTSETCALL if enabled TEST LSDEVN if enabled TEST RFSINAD if enabled TEST RFDISTN if enabled TEST RFSN if enabled TEST TXFREQ if enabled TEST TXLEVEL if enabled TEST TXSINAD if enabled TEST TXDI...

Page 13: ...ons 2 20 Automatic testing 2 22 Manual testing 2 23 Data displays 2 25 Introduction 2 25 Forward reverse data 2 25 List of figures Fig 2 1 System selection menus 2 3 Fig 2 2 Avionics Cellular or Trunk...

Page 14: ...ut The PROGRAM AUTO MANUAL and DATA keys give access to the screens and menus required for this The set up menus of the SYSTEMS mode give you control of the parameters of the test system Once set to y...

Page 15: ...EDACS REPEATERS 2 3 Fig 2 1 System selection menus Fig 2 2 Avionics Cellular or Trunked system selection screen...

Page 16: ...SET UP and PROGRAM keys as explained in this section SYSTEM The SYSTEM key brings up the SYSTEM SELECTION MENU allowing access to all of the test systems that are installed in the Service Monitor and...

Page 17: ...SYSTEM listing and also at the left of the screen heading The soft keys revert to system parameter keys If the polarity setting is being changed the new selection is shown against the Tx POLARITY lis...

Page 18: ...evel SYSTEM PARAMETERS menu keys without selecting a different system type press the key for the current system type You can set up parameters for the currently selected variant The edit current key a...

Page 19: ...he EDACS Repeater 1 variant EDIT CURRENT menu Note This causes information from the Radio variant to overwrite all the current SYSTEM information It cannot be retrieved CONTROL CHANNEL Before any test...

Page 20: ...ervice Monitor during signaling procedures The radio logical identity parameter allows you to change the number Note that if the Service Monitor sees a radio make a call to the group identity specifie...

Page 21: ...re The AUTORUN program pauses at the end of any test that fails always The AUTORUN program pauses at the end of every test Once the program has paused there are two available options The program can b...

Page 22: ...ted in Chapter 1 General Information Fig 2 9 Autorun parameters menu SYSTEM TYPE There are a number of different system types or Variants that can be selected from within the SYSTEMS PARAMETERS menu T...

Page 23: ...ncluding the decimal point and minus sign enters their character as the next in the title To delete the latest character placed in the title either Press the delete char key Press the DELETE key on th...

Page 24: ...the RF Port select key gives access to the RF port selection soft key list The possible selections are N out N in N out ANT in BNC out ANT in BNC out N in Typical settings for direct testing are N out...

Page 25: ...the form of a logical identity Other messages are PASSED WORKING CHANNEL Other failure messages are FAIL CHANNEL ASSIGNMENT No working channel signaling detected FAIL NOT ON CONTROL CHANNEL Repeater i...

Page 26: ...RTED BY USER User halted program before test was complete PASSED CLEARED DOWN HS data deviation The HS data deviation test measures the frequency deviation of the control channel signal from the repea...

Page 27: ...peater Failure messages are FAIL ABORTED BY USER User halted program before test was complete FAIL NO MODULATION No modulation has been received from the repeater FAIL UNSTABLE DEMOD Demodulation was...

Page 28: ...ed by the repeater on the current working channel The test fails if the RF frequency is found to be outside of the prescribed limits The message FAIL OUT OF RANGE is displayed Other messages are FAIL...

Page 29: ...repeater The test fails if the signal to noise level is below the prescribed limit The Service Monitor AF generator frequency is set to 1 kHz and its level is adjusted until the repeater generates the...

Page 30: ...sion circuits The test fails if the compression ratio is outside the tolerance limit The Service Monitor adjusts the AF level until the repeater generates the nominal modulation level then increases t...

Page 31: ...x distortion Failure messages are FAIL ABORTED BY USER User halted program before test was complete FAIL LOW DEMOD LEVEL Receiver audio level 5 mV Rx S N Receiver S N The Rx S N test measures the sign...

Page 32: ...r circuits Refer to Tx Compression test earlier in this section The Service Monitor generates an RF carrier modulated at the nominal modulation level It increases the modulation level by 5 dB and meas...

Page 33: ...f RF power can cause electric shocks or skin burns which can have lasting effects RF Input Ports Before making connections to a repeater ensure that the output power from the repeater will not exceed...

Page 34: ...test program are displayed and placed into the results store To make a permanent record of the results when the program has finished you can print out a hard copy using the print store key To run the...

Page 35: ...set to the deviation level specified for the system unless the value is required to be different to perform a specific test This is adjustable either by manual entry or by using the rotary control MOD...

Page 36: ...ayed on the screen are also output to a connected printer log to store All messages displayed on the screen are output to the automatic test results store accessible from the AUTO screen stop log Stop...

Page 37: ...il the facility is unlocked To enable the data display mode press the DATA key at the left hand side of the screen The data display mode allows you to view the data messages which are sent between the...

Page 38: ...st and is selected by using either the up or down keys or by using the variable rotary control Above this window is shown the full title of the codeword The binary display of the codeword is presented...

Page 39: ...s are generated when a MI BASIC TEST command is executed Error Code Error String 0 test passed 1 undefined test failure 101 INVALID PARAMETERS 102 TIMED OUT 103 ABORTED BY USER 104 NOT ON CONTROL CHAN...

Page 40: ...ta key 2 5 Error codes for NUMRESULTS A 1 G General testing program 1 2 Group identity number 2 8 I Identity number Group 2 8 K Key SYSTEM 2 2 L Logical identity number Radio 2 8 Logical identity numb...

Page 41: ...13 Clear From Testset 2 14 Data Performance 2 14 RF Frequency 2 16 RF SINAD 2 15 2 16 Rx Distortion 2 19 Rx Expansion 2 20 Rx S N 2 19 Rx Sensitivity 2 20 Rx SINAD 2 18 Tx Compression 2 18 Tx Distorti...

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