Agilent Technologies 83236B, Operating Manual, Page: 83 / 164

83
Chapter 3, Programming the PCS Interface using GPIB Control
Set Up and Measure
Perform the
Temperature
Compensations
Two temperature compensations are available. The dc offset compensation is
required to achieve the most accurate transmitter power measurements. The
generator level compensation provides the best generator level accuracy for
receiver testing. See "Temperature Compensations" on page 73 for a more
detailed description of these two compensations.
Temperature compensation for transmitter testing.
If the power detector in the PCS Interface is to be used for making a transmitter
power measurement, both the dc offset temperature compensation and the power
detector compensation should be checked and performed if necessary.
1. Use the following command to perform the dc offset temperature compensation.
To PCS Interface> COMP:PDET:DCOF:EXEC ( page 100 )
Temperature compensation for receiver testing
Since the Test System’s source is used for receiver testing, the generator level
temperature compensation should be checked and performed, if necessary, prior
to making a receiver measurement.
1. Check and see if the generator level temperature compensation is necessary.
a. Use the following command to query the PCS Interface for whether generator level
compensation is necessary.
To PCS Interface> COMP:TEMP:REQ:STAT? ( page 105 )
b. Store the result as a local constant.
For example: Status
2. If compensation is necessary (for example, Status=1), then set up the Test System for
the temperature compensation.
a. Use the following command string to indicate the frequency band desired for
receiver testing and to query the PCS Interface for the resulting frequency needed
at its FROM DUPLEX OUT port.
To the PCS Interface> COMP:TEMP:FREQ? <band or frequency>
( page 102 )
b. Define a local constant for the Test Set’s DUPLEX OUT frequency obtained in
step a.
For example: Duplex_freq
c. Use the following command string to set the Test Set’s generator frequency.
To the Test Set> RFG:FREQ <Duplex_freq>