Aeroflex 2945A Operation Manual Supplement Download Page 26

EDACS REPEATERS 

2-14 

Call from Testset 

This test routine is used to simulate the placement of a call from the Service Monitor to the 
repeater under test using the identity in the MOBILE

 PARAMETERS MENU.

 

Upon initialization, the Service Monitor must be on the control channel. 

If the 

USE ACCESSORY PORT

 parameter is set to 

ON

, the accessory port is set at this point in the 

test.  Note that the accessory port is not cleared at the end of this test. 

If any of the responses are incorrect, then the message 

*FAIL* UNEXPECTED MESSAGE

 is 

displayed.  Other messages are: 

*FAIL* NOT ON CONTROL CHANNEL 

Repeater is not on control channel (i.e. still in 
conversation. 

*FAIL* ABORTED BY USER 

User halted program before test was complete. 

*FAIL* CHANNEL ASSIGNMENT 

No working channel signaling detected. 

PASSED  WORKING CHANNEL 

 

 

Clear From Testset 

The Service Monitor clears down from the current working channel and returns to the previous 
control channel. 

If the 

USE ACCESSORY PORT

 parameter is set to 

ON

, the accessory port is cleared at this point 

in the test. 

Other messages are: 

*FAIL* NOT ON WORKING CHANNEL 

The previous call placement failed. 

*FAIL* ABORTED 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 
repeater.  This high speed data signal is transmitted continuously. 

The only failure message for this test is: 

*FAIL* ABORTED BY USER 

User halted test before completion. 

 

Data performance 

The data performance test checks the accuracy of the repeater’s data reception under low signal 
conditions. 

The test sequence is as follows.  Upon initialization, the test title is displayed and the Service 
Monitor checks the control channel.  If not on the control channel, the error message *FAIL* NO 
CONTROL CHANNEL is displayed. 

The Service Monitor sets the RF generator level, sends a login request to the repeater and waits for 
an acknowledge message.  If no response is received after this has been repeated ten times, the test 
is aborted and the message *FAIL* NO RESPONSE is displayed. Otherwise the test is repeated 
another 90 times. 

If, after 100 tests, the percentage pass is above the specified limit, the message PASSED is 
displayed, together with the % bit error rate.  The message *FAIL* xx% means that the percentage 
pass is below the specified limit. 

Another possible failure message is: 

*FAIL* ABORTED BY USER 

User halted program before test was complete. 

 

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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