User's Manual

Test Set Calibration – continued
PRELIMINARY
08/01/2001
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1X SCt4812ET Lite BTS Optimization/ATP
of the TX cable configuration must be as required for the BTS
(normally 30 or 50 dB). The Motorola Cybertest analyzer is different
in that the required attenuation/load is built into the test set so the TX
cable configuration consists only of the required length coax cable.
Calibrating Cables with a
CDMA Analyzer
The Cable Calibration menu item from the Util menu list is used to
calibrate both TX and RX test cables for use with CDMA LMF.
LMF cable calibration cannot be accomplished with an
HP8921A analyzer for 1.9 MHz. A different analyzer type
or the signal generator and spectrum analyzer method must
be used (refer to Table 3-27 and Table 3-28). Cable
calibration values must be manually entered if the signal
generator and spectrum analyzer method is used. For the
HP8921A, refer to Appendix F.
NOTE
The test equipment must be selected before this procedure can be started.
Follow the procedure in Table 3-26 to calibrate the cables. Figure 3-14
illustrates the cable calibration test equipment setup.
Table 3-26: Cable Calibration
Step Action
1 From the Util menu, select Cable Calibration. A Cable Calibration window is displayed.
2 Enter a channel number(s) in the Channels box. Multiple channels numbers must be separated with a
comma, no space (i.e., 200,800). When two or more channels numbers are entered, the cables will be
calibrated for each channel. Interpolation will be accomplished for other channels as required for TX
calibration.
3 Select TX and RX CABLE CAL, TX CABLE CAL or RX CABLE CAL in the Cable Calibration
picklist.
4 Click OK. Follow the directions displayed for each step. A status report window will be displayed
with the results of the cable calibration.
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