User's Manual

TX Pilot Time Offset Acceptance Test
08/01/2001
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1X SCt4812ET Lite BTS Optimization/ATP
PRELIMINARY
Background
This test verifies the transmitted pilot channel element Pilot Time Offset
of each BBX carrier keyed up at a specific frequency per the current
CDF file assignment. All tests will be performed using the external
calibrated test set controlled by the same command. All measurements
will be via the TX OUT connector.
The pilot gain will be set to 262 for each antenna and all TCH elements
from the MCCs will be forward link disabled. The BBX2 will be keyed
up using both
bbxlvl and bay level offsets to generate a CDMA carrier
(with pilot channel element only, Walsh code 0). TX power output is set
at 40 dBm as measured at the TX output.
The calibrated communications test set will measure and return the Pilot
Time Offset in ms, verifying that results meet system tolerances:
Pilot Time Offset should be within 3 ms of the target PT Offset
(zero ms).
The BBX2 will then dekey, and if selected, the redundant BBX2 will be
assigned to the current TX antenna path under test. The test will then be
repeated.
This test also executes and returns the TX Frequency and
TX Waveform Quality (rho) ATP tests, however, only Pilot
Time Offset results are written to the ATP test report.
NOTE
Pilot Time Offset Acceptance
Test
Follow the steps in Table 4-7 to verify the Pilot Time Offset on the
specified TX antenna paths using BBXs and BDCs equipped at the BTS.
Table 4-7: Test Pilot Time Offset
Step Action
1 Set up the test equipment for TX acceptance tests per Table 4-1.
2 Select the BBX2s to be tested.
3 From the Tests menu, select Pilot Time Offset.
4 Select the appropriate carrier(s) (carrier-bts#-sector#-carrier#) displayed in the Channels/Carrier pick
list.
NOTE
To select multiple items, hold down the Shift or Ctrl key while making the selections.
5 Enter the appropriate channel number in the Carrier n Channels box.
6 Click OK. The status report window is displayed and a Directions pop-up is displayed.
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