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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
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?
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>
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>
Содержание 83236B
Страница 7: ...vii...
Страница 10: ...x...
Страница 14: ...Contents 14 Error Message 154 Glossary 161...
Страница 30: ...30 Chapter 1 General Information Other Information...
Страница 123: ...123 5 S pecifications Specifications...
Страница 137: ...137 A F requency Conversion Tables Appendix A Frequency Conversion Tables...
Страница 140: ...140 Appendix A Frequency Conversion Tables Frequency Conversion for Signal Generation...
Страница 141: ...141 B M anual Changes Appendix B Manual Changes...
Страница 164: ...Index 164 TX definition 162 TX subsystem 114 TX RX port 25 typical 124 U upconverter definition 162 W warm up time 124...