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Chapter 3 65
Overview of the Test Set’s Built-In Tools
Using RF Tools Program
Replot Data Files
This utility allows you to easily retrieve and display plots which were
previously stored on an SRAM PC card. One or two plots may be
displayed at one time.
No measurements are performed.
Transfer Stored Data
This utility may be used to easily transfer data collection files (test
results) from an SRAM PC card over the serial or HP-IB port. You do
not need to write an IBASIC program. No measurements are
performed.
SA (spectrum analyzer) Self Calibration ON/OFF
This test allows you to check the status of the Test Set’s spectrum
analyzer, and change the status if you desire.
The RFTOOLS program uses the Test Set’s internal spectrum analyzer
for making network analyzer measurements. The internal spectrum
analyzer performs an automatic self calibration every 5 minutes. This
automatic self calibration insures that the spectrum analyzer operates
within specified limits regardless of the operating temperature.
However, this self calibration can introduce instability in spectrum
analyzer output after the Test Set is operating at a constant
temperature (after approximately 30 minutes).
Each RFTOOLS test includes two parts; calibration and measurement.
If the spectrum analyzer performs a self calibration between the
calibration and measurement of the RFTOOLS test, the spectrum
analyzer automatic self calibration instability will increase RFTOOLS
test measurement error. To avoid this problem, you may use this test to
turn off the spectrum analyzer self calibration. This self calibration
should only be turned off after the unit has reached a constant
powered-on operating temperature (approximately 30 minutes after
power-on). By turning the self calibration off, the measurement
accuracy and stability of RFTOOLS tests will improve.
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