Xmtr Carrier Null Adjustment Using Dvm - Alcatel MDR-8000 User Manual

XMTR CARRIER NULL ADJUSTMENT USING DVM

5.18
PURPOSE
See Figure 5 - 22 and follow the procedure to check, and if necessary, adjust carrier null
using a DVM at the XMTR monitor port on radio that is not equipped with the optional PA.
This is an out-of-service procedure when on a nonstandby
(unprotected system). On a hot-standby or frequency diversity
system, switch traffic on the channel under test off line.
PWR MON
FREQ CONT
XMT PWR
ALM
ON LINE
I CARR NULL
Q CARR NULL
TRANSMITTER
Figure 5 - 22 XMTR Carrier Null Adjustment Using DVM (Sheet 1 of 2)
5-54
CAUTION
Possibility of
Service
Interruption
If ATPC is enabled, disable (XMTR will
go to high power).
XMT LVL
ADJ
a Connect DVM (+) to
on XMTR module.
Connect DVM (-) to any GND point on shelf.
b
c Set DVM mode for DC volts and 2 Vdc scale.
READ X.X dBm
FOR XX.X dBm
AT TOP OF RACK
XTAL
MON
RF
MON
RF
OUT
Note
DVM
PWR MON monitor point
MDR-1057
09/08/05