User's Manual

Power Delta Calibration – continued
H-12 1X SC 4812T Lite BTS Optimization/ATP FEB 2005
PRELIMINARY
Table H-3: Agilent 8935 Power Delta Calibration Procedure
n ActionStep
7 Connect the short RF Cable between the Agilent 8935 Duplex Out Port and the RF–IN/OUT Port.
– Refer to Figure H-6.
8 Ensure that the Source Agilent 8935 Settings are the same as in Step 3.
9 Set the Agilent 8935 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
– Anl Dir to Fwd
10 Turn on the Agilent 8935 Signal Output.
11 Set the Chn Pwr Cal to Calibrate and select to calibrate.
12 Measure and record the Channel Power Reading on the measuring Agilent 8935 as Result B.
B ________________________
13 Turn off the Agilent 8935 Signal Output and disconnect the equipment.
14 Calculate the Power Calibration Delta Value.
– The Delta Value is the Power Meter Measurement minus the Advantest Measurement.
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
NOTE
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.
– Refer to Step 4 in Table H-6.
Power
Sensor
Agilent Agilent 8935
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
DUPLEX OUT
Short RF Cable
HP437B
SENSOR
FW00805
Figure H-5: Delta Calibration Set–up – Agilent 8935 to HP437
H