User's Manual

Test Set Calibration68P09255A69-3
Aug 2002
1X SC4812ET Lite BTS Optimization/ATP Software Release 2.16.1.x
PRELIMINARY
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Table 3-33: Calibrating Non-Duplexed RX Test Cable Configuration Using a Signal Generator and Spectrum
Analyzer
Step Action
5
Calibration factor = (value measured with detail A setup) - (value measured with detail B setup)
Example: Cal factor = -12 dBm - (-14 dBm) = 2 dB
NOTE
The short test cable is used for test equipment setup calibration only. It is not part of the final test
setup. After calibration is completed, do not re-arrange any cables. Use the test cable configuration
as-is to ensure test procedures use the correct calibration factor.
Figure 3-23: Calibration Setup for Non-Duplexed TX/RX Antenna Connection RX Test Cable Configuration
Using Signal Generator and Spectrum Analyzer
Spectrum
Analyzer
Signal
Generator
A
B
Spectrum
Analyzer
SHORT
TEST
CABLE
CONNECTION TO THE COMMUNICATIONS
SYSTEM ANALYZER RF OUTPUT
CONNECTOR DURING RX MEASUREMENTS
Signal
Generator
BULLET
CONNECTOR
RX TEST
CABLE
SHORT TEST
CABLE
CONNECTION TO THE BTS RX ANTENNA
CONNECTOR DURING RX ATP
IMPORTANT: IF BTS TX/RX SIGNALS ARE
DUPLEXED, THE RX TEST CABLE CONNECTS
TO THE DUPLEXED ANTENNA CONNECTOR
AND MUST USE/BE CALIBRATED WITH THE 30
DB DIRECTIONAL COUPLER AND 20 DB
IN-LINE ATTENUATOR. SEE FIGURE 3-22.
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