User Manual
Adjusting for loss
68P09255A57-2
Aug 2002
SC4812ET Optimization/ATP Manual Software Release R16.1.x.x
PRELIMINARY
3-80
Single-Sided BLO
Normally valid values are some value plus-or-minus some offset. If
single-sided BLO” is selected, the result will only be considered a
success if it’s in the lower half of the range. If it was normally success
from 37-47 (which is 42
± 5), single-sided BLO” would make it a
success only if the result was from 37-42.
Prerequisites
Before running this test, ensure that the following have been done:
CSM-1, GLIs, MCCs, and BBXs have correct code load and data
load.
Primary CSM and MGLI are INS.
All BBXs are OOS_RAM.
Test equipment and test cables are calibrated and connected for TX
BLO calibration.
LMF is logged into the BTS.
Connect the test equipment as shown in Figure 3-10 and Figure 3-11 and
follow the procedure in Table 3-41 to perform the TX calibration test.
WARNING
Before installing any test equipment directly to any TX OUT
connector, first verify there are no CDMA BBX channels
keyed. Failure to do so can result in serious personal injury
and/or equipment damage.
NOTE
Verify all BBX boards removed and repositioned have been
returned to their assigned shelves/slots. Any BBX boards moved
since they were downloaded will have to be downloaded again.
Table 3-41: BTS TX Path Calibration
Step Action
1 Select the BBX(s) to be calibrated.
NOTE
If STANDARD, CDF or CDFPILOT is selected for TEST PATTERN, then at least one MCC
must be also selected.
2 From the Tests menu, select TX>TX Calibration.
3 Select the appropriate carrier(s) displayed in the Channels/Carrier pick list. (Press and hold the
<Shift> or <Ctrl> key to select multiple items.)
4 Type the appropriate channel number in the Carrier n Channels box.
5 Select Verify BLO (default) or Single-sided BLO.
NOTE
Single-sided BLO is only used when checking non-redundant transceivers.
6 From the Test Pattern pick list, select a test pattern.
3