User's Manual

Test Set Calibration – continued
SC 4812T CDMA BTS Optimization/ATP
May 2000
3-56
Table 3-27: Calibrating RX Cables Using a Signal Generator and Spectrum Analyzer
 ActionStep
5 Calibration factor = A – B
Example: Cal = –12 dBm – (–14 dBm) = 2 dB
NOTE
The short test cable is used for test equipment setup calibration only. It is not be part of the final
test setup. After calibration is completed, do not re-arrange any cables. Use the equipment setup,
as is, to ensure test procedures use the correct calibration factor.
Figure 3-18: Calibrating Test Equipment Setup for RX ATP Test
(using Signal Generator and Spectrum Analyzer)
Spectrum
Analyzer
Signal
Generator
A
B
Spectrum
Analyzer
SHORT
TEST
CABLE
SHORT TEST
CABLE
CONNECTION TO THE HP PCS
INTERFACE OUTPUT PORT
DURING RX MEASUREMENTS.
Signal
Generator
BULLET
CONNECTOR
LONG
CABLE 2
CONNECTION TO THE RX PORTS
DURING RX MEASUREMENTS. FW00294
3