User's Manual

Bay Level Offset Calibration68P09255A61-4
Aug 2002
1X SC 4812T BTS Optimization/ATP Software Release 2.16.1.x
FIELD TRIAL
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Rate Set Drop-down Pick List
The Rate Set Drop-down Box is enabled if at least one MCC card is
selected for the test. The available options for TX tests are 1 = 9600, and
3 = 9600 1X. Option 3 is only available if 1X cards are selected for the
test. The available transfer rate options for RX tests are 1 = 9600 and
2 = 14400. Option 2 is only available if no 1X cards are selected.
Verify BLO
In both the TX Calibration and All Cal/Audit dialog boxes, a Verify
BLO checkbox is provided and checked by default. After the actual TX
calibration is completed during either the TX Calibration or All
Cal/Audit process, the BLO derived from the calibration is compared to
a standard, acceptable BLO tolerance for the BTS. In some installations,
additional items may be installed in the transmit path. The additional
change in gain from these items could cause BLO verification failure
and, therefore, failure of the entire calibration. In these cases, either the
Verify BLO checkbox should be unchecked or the additional path losses
should be added into each applicable sector using the
Util>Edit>TX Coupler Loss... function.
Single-sided BLO
Another option that appears in the pull-down menu is Single-sided
BLO. Normally valid BLO values are some value plus-or-minus some
offset. The ranges that we currently use for calibration are wider than
necessary to accommodate the redundant BBX. The lower half of that
range is where non-redundant BBXs should be. When Single-sided
BLO is selected, the result is only considered a success if it is in the
lower half of the range. If it was normally a success from 37-47 (which
is 42 "5), Single-sided BLO would make it a success only if the result
was from 37-42. To get the more stringent conditions, the operator
checks Single-sided BLO when calibrating non-redundant transceivers.
Single-sided BLO carries the likelihood of more failures. This option
should only be used by experienced CFEs.
Test Pattern
The TESTS_TX CAL menu has a Test Pattern pull-down menu. This
menu has the following choices:
 Pilot (default) - performs tests using a pilot signal only. This pattern
should be used when running in-service tests. It only requires a BBX
to do the test.
 Standard - performs the tests using pilot, synch, paging and six
traffic channels. This pattern should be used on all non-in-service
tests. Standard requires a BBX and an MCC. Standard uses gain
values specified by the IS97 standard.
 CDFPilot -performs the tests using the pilot signal, however, the gain
is specified in the CDF file. Advanced users may use CDFPilot to
generate a Pilot pattern using the value specified by the PilotGain
parameter in the CDF file instead of a pre-determined value.
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