IPMobileNet IP8B, Product Owners Manual

SECTION 2:  FACTORY TEST PROCEDURE

369548.DOC  

Page 

16

Exciter 
 

Step 1

 Using 

the 

X=1400,19

 command, generate data messages so the transmit power and 

frequency can be checked. 

 
Step 2

Note the power level and then on the power amplifier circuit board adjust the 
potentiometer (R3) fully counterclockwise (this will enable low power transmit operation). 

Step 3

Connect the base stations’ transmit port to the HP communication test set. 

Step 4

While transmitting data messages using the 

X=1400,19

 command, adjust the following: 

ƒ

  TCXO Y1 for minimum frequency error 

ƒ

 R42 

for 

±

5 KHz deviation 

Transmit output power should be approximately 1mWatt.  The REFMOD adjustment needs to be made 
while the base station is transmitting real data messages to and from a mobile radio.  This is most easily 
done using the ping command to ping the IPNC from a mobile radio.  This will cause the base station to 
repeatedly send data messages and will facilitate the REFMOD adjustment. 

 
Step 5 

Connect the base station to the IPNC. 

Step 6 

Using a calibrated mobile radio operating on the base station’s channel, adjust R30 for 
consistent data quality readings of 248 (as observed on the mobile radio’s attached PC 

IP

Message window).  Access the MSDOS prompt and ping using the following command: 

>;ping 192.168.3.3 –t –l 500 –w 2000 

This command will ping the IPNC continuously with a 500-character test message.  Press 

[Ctrl]

+

C

 to 

stop the ping. 

Power Amplifier 
 
 

Step 1

Connect the base station’s transmit port to the communication test set. 

Step 2

 Using 

the 

X=1400,19

 command, generate data messages.  

Step 3 

Slowly increase the base station output power by turning the power control potentiometer 
clockwise until the power noted in Step 2.  

Do not exceed 20 watts output power, as this will reduce the life of the amplifier module.  If the base 
station uses a power amplifier, output power must be set to achieve power output specified for the 
specific base station installation. 

Step 4 

Perform a close visual inspection of the base station paying close attention to 
manufacturing related problems such as loose screws, solder practices, etc.