User's Manual

Table Of Contents
Power Delta Calibration
68P09255A61-4
Aug 2002
1X SC 4812T BTS Optimization/ATP Software Release 2.16.1.x
FIELD TRIAL
I-4
Table I-1: HP8921A Power Delta Calibration Procedure
Step Action
7 Ensure that the source HP8921A settings are the same as in Step 2.
8 Set the measuring HP8921A as follows:
- Measure mode to CDMA Anl
- Frequency to the CDMA calibration target frequency
- Input Attenuation to 0 dB
- Input port to RF-IN
- Gain to Auto
- Analyzer Direction to Fwd
9 Turn on the source HP8921A signal output.
10 Measure and record the channel power reading on the measuring HP8921A as result
B ________________________.
11 Turn off the source HP8921A signal output and disconnect the equipment.
12 Compute the delta between HP437B and HP8921A using the following formula:
Delta = A - B
Example: Delta = -0.70 dBm - (-1.25 dBm) = 0.55 dBm
Example: Delta = 0.26 dBm - 0.55 dBm = -0.29 dBm
These examples are included to show the mathematics and do not represent actual readings.
NOTE
Add this delta value to the TX Cable Loss value during In-Service Calibration (see Step 4 in
Table I-5).
Figure I-1: Delta Calibration Setup - HP8921A to HP437B
Short RF Cable
HP 8921A
DUPLEX
OUT
HP437B
Power
Sensor
SENSOR
FW00801
I