Xmtr Carrier Null Adjustment Using Spectrum Analyzer - Alcatel MDR-8000 User Manual

XMTR CARRIER NULL ADJUSTMENT USING SPECTRUM ANALYZER

5.17
See Figure 5 - 21 and follow the procedure to adjust carrier null on the UD-35A( )
Transmitter.
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 to protect. Use front panel OVRD controls on AE-37( ) Controller to
lock on-line XMTR (opposite side from failed XMTR) on line.
Click Calibrate A or B Side
a
Calibrate A Side
Carrier Null A
Ensure that the radio, and specifically the
transmitter unit, is allowed to warm up for
at least one hour operating in the radio
before performing carrier null adjustments.
Figure 5 - 21 XMTR Carrier Null Adjustment Using Spectrum Analyzer (Sheet 1 of 3)
CAUTION
Possibility of
Service
Interruption
Calibrate B-side
Carrier Null B
b Wait. Message displays.
The system is automatically adjusting the Tx
Power Level. Please wait approximately 20
seconds for the process to complete.
c After approx. 20 sec, OK To Null Carrier message
Abort
displays.
(Note: A Spectrum Analyzer is required for
this procedure). Remove the A side I/O
interface module. Adjust the (I CARR Null
and Q CARR Null) potentiometers located
on TRANSMITTER module to minimum
carrier. Click on Next when you are done.
Abort
Note
Next
Back Next
See Sheet 2 for connecting and setting
spectrum analyzer and test details
Note
If ATPC is enabled, disable (XMTR
will go to high power).
MDR-10454
09/08/05
5-51