User Manual

Bay Level Offset Calibration – continued
08/15/2000
3-69
SC 4812ETL BTS Optimization/ATP
PRELIMINARY
–2.0 dBm) and RFDS directional coupler/cable (approximately
–0.6 dBm) would equate to 41.4 dB BLO.
The LMF Tests menu list items, TX Calibration and All Cal/Audit,
perform the TX BLO Calibration test for a XCVR(s). The All Cal/Audit
menu item performs TX calibration, downloads BLO, and performs TX
audit if the TX calibration passes. All measurements are made through
the appropriate TX output connector using the calibrated TX cable setup.
Prerequisites
Before running this test, ensure that the following have been done:
S CSM–1, GLIs, MCCs, and BBX2s have correct code load and data
load.
S Primary CSM and MGLI are INS.
S All BBX2s are OOS_RAM.
S Test equipment and test cables are calibrated and connected for TX
BLO calibration.
S LMF is logged into the BTS.
Connect the test equipment as shown in Figure 3-14 and Figure 3-15
and follow the procedure in Table 3-33 to perform the TX calibration
test.
Before installing any test equipment directly to any TX
OUT connector, first verify there are no CDMA BBX2
channels keyed. Failure to do so can result in serious
personal injury and/or equipment damage.
WARNING
Verify all BBX2 boards removed and repositioned have
been returned to their assigned shelves/slots. Any BBX2
boards moved since they were downloaded will have to be
downloaded again.
IMPORTANT
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