User's Manual

Power Delta Calibration68P09255A69-3

Aug 2002

1X SC4812ET Lite BTS Optimization/ATP Software Release 2.16.1.x

PRELIMINARY

H-13

Table H-4: HP8921A Power Delta Calibration Procedure

Step Action

9 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

10 Turn on the source HP8921A signal output.

11 Measure and record the channel power reading on the measuring HP8921A as result

B ________________________.

12 Turn off the source HP8921A signal output and disconnect the equipment.

13 Compute the delta between HP437 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 H-6).

Figure H-8: Delta Calibration Setup - HP8921A to HP437

Short RF Cable

HP 8921A

DUPLEX

OUT

HP437B

Power

Sensor

SENSOR

FW00801