User Manual

AS4000 Central Terminal
Installation and Commissioning
Appendix
605-0000-452
2
Issue 1.3dr Date 7/02/00
Page 1 of 2 © Copyright Airspan Communications Corporation 2000
PROCEDURE IN CASE OF POWER CONTROL LOOP
FAILURE
1. Output Power Level Detection
The PA module must detect the average transmit power level over the amplitude range +24
dBm to +36 dBm per each PA within assembly.
The output power detector should provide a voltage output in the range 1V to 4V into a load of
>10k ohms, for average output power of 24 dBm to 36 dBm. This voltage should never rise
above 5.3V. The voltage characteristic should fall within the following mask across all
temperature, Tx Band frequency and production tolerances:
Log Output
Voltage
(1 to 4 V)
PA Output Power
(dBm)
0
0.6
24 36
0.5 dB
If the Power Control Loop is not functioning correctly check the following:
If using 3.4-3.6GHz-band the PA MUST be the modified Amplidyne PA marked xxxxxxx rev
C2. Or later on earlier revisions the PCL does not work correctly. The rev C1has a 3db lower
o/p power although the mappings are correct. Prior to Rev C1 the mappings were different.
Check that the Combiner Monitor F/W is 696-3000-162 rev F or G.
Check that the Shelf Controller F/W is 696-3000-272/273 rev B or rev C.
Check that JP1 and JP2 are selected for the appropriate shelf number. This is essential to the
operation of the PCL.
JP1 JP2