SECTION 2: FACTORY TEST PROCEDURE
369548.DOC
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Step 13
Inject on-frequency signal at a level of –80 dBm, modulated with a 1 KHz test tone at
±
5.0 KHz deviation into Receiver 1.
Step 14
While monitoring the AC voltage at TP6 adjust audio 1 AC adjustment potentiometer
(R72) for 350 mVRMS (
±
1 mV).
Step 15
While monitoring the DC voltage at TP6 adjust audio 1 DC adjustment potentiometer
(R57) for 2.500 VDC (
±
1 mV).
The audio AC and DC adjustments are interactive, therefore continue adjusting R72 for 350 mVRMS and
R57 for 2.500 VDC until further adjustments are no longer required.
Step 16
Inject on-frequency signal at a level of –80 dBm, modulated with a 1 KHz test tone at
±
5.0 KHz deviation into Receiver 2.
Step 17
While monitoring the AC voltage at TP6 adjust audio 1 AC adjustment potentiometer
(R71) for 350 mVRMS (
±
1 mV).
Step 18
While monitoring the DC voltage at TP6 adjust audio 1 DC adjustment potentiometer
(R58) for 2.500 VDC (
±
1 mV).
The audio AC and DC adjustments are interactive, therefore continue adjusting R71 for 350 mVRMS and
R58 for 2.500 VDC until further adjustments are no longer required.
Step 19
Inject on-frequency signal at a level of –80 dBm, modulated with a 1 KHz test tone at
±
5.0 KHz deviation into Receiver 3.
Step 20
While monitoring the AC voltage at TP6 adjust audio 1 AC adjustment potentiometer
(R53) for 350 mVRMS (
±
1 mV).
Step 21
While monitoring the DC voltage at TP6 adjust audio 1 DC adjustment potentiometer
(R59) for 2.500 VDC (
±
1 mV).
The audio AC and DC adjustments are interactive, therefore continue adjusting R53 for 350 mVRMS and
R59 for 2.500 VDC until further adjustments are no longer required.
Step 22
Adjust the carrier detect potentiometer (R74) to illuminate a level of –116 dBm.
Receive Data
Step 1
Using a calibrated mobile radio, generate uplink data messages using the
X=1400,19
command in the
IP
Message Utility program.
Step 2
Attach an antenna to one of the base station’s receiver ports and verify on the base
station monitor screen (HyperTerminal) that the received message data quality are
consistently 240 and higher for 1400 character messages. Repeat test for each receiver.
