User's Manual

Table Of Contents
Power Delta Calibration
FEB 2005 1X SC 4812T Lite BTS Optimization/ATP H-3
PRELIMINARY
Introduction
The ISC Procedure has several differences from a normal Calibration
Procedure. One of these is the use of a Spectrum
Analyzer/Communications Test Set instead of a Power Meter to measure
power.
Power Meters are Broadband Measurement Devices and cannot be
used to measure power during ISC because other carriers are
operating.
A Spectrum Analyzer can be used because it measures power at a
given frequency.
Measuring power using a Spectrum Analyzer is less accurate than using
a Power Meter, therefore, compensation is required for the Accuracy
Difference (Delta) between the Power Meter and the Spectrum Analyzer.
Agilent E4406A Power Delta
Calibration
The Agilent E4406A Transmitter Tester and E4432B Signal Generator
Test Equipment combination can be used for ISC of IS–2000 CDMA 1X
as well as IS–95A/B Operation Modes. The Power Delta Calibration is
performed on the E4406A, but the E4432B is required to generate the
Reference Signal used to calculate the Power Delta offset. After the
Offset Value has been calculated, add it to the TX Test Cable Insertion
Loss Value in the LMF.
Preliminary Agilent Test Equipment Set–up
To provide proper operation during Power Delta Calibration, ensure that
the E4406A and E4432B are connected as shown in Figure F-18.
Power Delta Calibration
Perform the procedure in Table H-1 to perform the Agilent E4406A
Power Delta Calibration Procedure.
Table H-1: Agilent E4406A Power Delta Calibration Procedure
n Step Action
NOTE
Perform this procedure after Test Equipment has been allowed to warm–up and stabilize for a
minimum of 60minutes.
After it is warmed–up and stabilized, calibrate the Test Equipment as described in the “Test
Set Calibration” section of Chapter 3.
1
Zero the Power Meter prior to connecting the Power Sensor to the RF Cable from the Signal
Generator.
NOTE
For best accuracy, always re–Zero the Power Meter before connecting the Power Sensor to the
component being calibrated.
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H