User's Manual

Table Of Contents
Power Delta Calibration – continued
H-14 1X SC 4812T Lite BTS Optimization/ATP FEB 2005
PRELIMINARY
HP 8921A Power Delta
Calibration
Use the HP 8921A Communications Test Set to measure power during
ISC only for IS–95A and B Operation of 800 MHz Systems. After the
Offset Value has been calculated, add it to the TX Test Cable Insertion
Loss Value.
Perform the procedure in Table H-4 to perform the HP 8921A Power
Delta Calibration Procedure.
This procedure requires two HP 8921A Communication
Test Sets.
NOTE
Table H-4: HP 8921A 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 60 minutes. 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.
2 Connect a short RF Cable between the HP 8921A Duplex Out Port and the HP437 Power Sensor.
Refer to Figure H-7.
3 Set the HP 8921A Signal Source as follows:
Measure Mode to CDMA Generator
Frequency to the CDMA Calibration Target Frequency
CW RF Path to IQ
Output Port to Dupl
Data Source to Random
Amplitude to 0 dBm
4 Measure and record the Power Value Reading on the HP437 Power Meter.
5 Record the Power Meter Reading as Result A.
A ________________________.
6 Turn off the source HP 8921A Signal Output, and disconnect the HP437.
NOTE
Leave the settings on the source HP 8921A for convenience in the following steps.
table continued on next page
H