IPMobileNet IP8B, Product Owners Manual

SECTION 2:  FACTORY TEST PROCEDURE

369548.DOC  

Page 

15

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.