Specifications

Input Attenuation Switching Uncertainty Performance Test
Agilent Technologies
PSA Series Spectrum Analyzers
Test and Adjustment Software
Input Attenuation Switching Uncertainty
Performance Test
This test measures the step accuracy of the PSA input attenuator at 50 MHz. A signal
source is connected to the PSA through the 10 dB and 1 dB precision step attenuators. The
PSA input attenuator is varied from 0 dB to 70 dB while the external attenuator is
switched from 70 dB to 0 dB. The step loss of the external attenuator is characterized to ±
.03 dB, therefore the PSA Input Attenuator Switching Uncertainty can be calculated
through RF substitution. The PSA mixer level is maintained at a constant level, thus
eliminating scale fidelity error.
If the PSA is outfitted with Option B7J, Digital Demod Hardware, the test is performed
once again on the internal Electronic Attenuator.
NOTE: This test requires step attenuator calibration data to obtain valid results. Make
sure you enter the calibration data for the step attenuators that you're using. Please refer
to the
Enter Equipment Calibration Data section in the TME help for details on how to
enter this data. You must enter the data for the following columns to obtain valid results:
Attn(dB), Uncert(dB) and ReflSize.
Required Test Equipment
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