User Manual

Bay Level Offset Calibration – continued
5/21/04 1X SC4812T–MC BTS Optimization/ATP 3-83
DRAFT
points (C[21] – C[40]), etc. The RxCal data is sent next (C[241] –
C[480]), followed by the RxDCal data (C[481] – C[720]).
S Temperature compensation data is also stored in the cal file for each
set.
Test Equipment Set-up for
RF Path Calibration
Follow the procedure in Table 3-34 to set up test equipment.
Table 3-34: Test Equipment Setup (RF Path Calibration)
n Step Action
1 Verify the GPIB controller is properly connected and turned on (does not apply to
the Agilent E7495A).
! CAUTION
To prevent damage to the test equipment, all transmit (TX) test connections must
be via the 30 dB directional coupler.
2 If it has not already been done, connect the LMF computer to the BTS LAN A
connector on the BTS. Refer to the procedure in Table 3–2.
S If required, calibrate the test equipment using the procedure in Table 3-26.
S Connect the test equipment as shown in Figure 3-15 throug Figure 3-17.
Transmit (TX) Path Calibration
Description
The assigned channel frequency and power level (as measured at the top
of the frame) for transmit calibration are derived from the site CDF files.
For each BBX, the channel frequency is specified in the
[CdmaChans]
in the cbsc–#.cdf file and the power is specified in the SIFPilotPwr
CDF file parameter for the sector associated with the BBX (located
under the
ParentSECTOR field of the ParentCARRIER CDF file
parameter).
If both the bts–#.cdf and cbsc–#.cdf or
NECB*bts#.xml and NECJ*bts#.xml files are current,
all information will be correct on the LMF. If not, the
carrier and channel will have to be set for each test.
NOTE
The calibration procedure attempts to adjust the power to within "0.5
dB of the desired power. The calibration will pass if the error is less than
the value set in the “TX Nominal offset” tolerance.
3