S MM102244V1, Rev. B 5 —— —— 10.0 MAINTENANCE 10.1 10.2 COS Integrated Circuit devices used in this equipment can be destroyed by static discharges. Before handling onc of these devices, the service person should discharge himself by touching the case of a bench test instrument that has a 3-prong power cord connected to an outlet with a known good earth ground.
BARRIOS ’ MM102244V1, Rev. B 10.2.1 800 MHz stations 1) Program the station for the desired RX and TX frequencies or a frequency pair that is in the center of the desired frequencies. Programmable bandwidth is { 500 kHz. 2) Place the RX Synthesizer on an extender card. Alternately, one can remove RX FE and RX IF modules from the T/R shelf gain access to the trimmer slug on the Synthesizer module. 3} Adjust the RX Synthesizer trimmer until the LED on the front of the module goes “out”.
MI102244V1, Rev. B a2 Front End: BARRIOS ’ The preferred method of nine for the RX Front End is using the MARTS 111 module test fixture and associated procedures. This is required to sweep tune stations for more than one RX frequency. However, when using one frequency, one can peak tune the RX Front End as follows (reference alignment procedure in LB1.38673): 1) Place the extender card and connect the LO out of the RX Synthesizer and the IF out of the Front End to the IF module with 5002 coax.