User's Manual Part 2

Test Set Calibration – continued

DRAFT

Mar 2001

3-61

SCt4812T CDMA BTS Optimization/ATP

Table 3-28: Calibrating RX Cables Using a Signal Generator and Spectrum Analyzer

 ActionStep

5 Calibration factor = A – B

Example: Cal = –12 dBm – (–14 dBm) = 2 dBm

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

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