372 Chapter 8
N5531S Measuring Receiver Performance Verification
Performance Verification Tests
N5531S Measuring Receiver Performance
Verification
Specs apply to following conditions:
Frequency must be set manually. (Do not use the measuring receiver Frequency
Count measurement).
Accuracy mode must be set to High.
Range 3 Switch Delay must be ON for early instruments.
Key path:
Meas Setup, More
Applies only to instruments with Option Driver part number E444060253 and
firmware release less than A.11.00. Press
System, More, Show Hardware to
view the option driver part number.
Description
A highly calibrated step attenuator is used in conjunction with a highly stable
signal source to provide a 50 MHz test signal of varying amplitudes to the PSA.
The PSA is placed in the Measuring Receiver mode, and the TRFL level
measurement is selected.
The step attenuator is set to 0 dB and a reference measurement is taken.
The step attenuator is stepped from 0 to -110 dB and the amplitude at each step
recorded.
The difference between the expected attenuation value as recorded on the step
attenuator calibration report, and the measured value, is the linearity accuracy.
NOTE For E4446A, E4447A and E4448A:
If the following procedure is modified to test at frequencies above 3.05 GHz, a
stabilization period is required for the Option 123, preselector bypass.
When performing measurements across the following frequency band breaks, a
single 10 minute stabilization period is required to meet specification after entering
the new frequency band.
Band breaks occur at the following frequencies:
Band 0 to Band 1 3.05 GHZ
Band 1 to Band 2 6.6 GHz
Band 2 to Band 3 13.2 GHz
Band 3 to Band 4 19.2 GHz
Band 4 to Band 5 26.8 GHz
Band 5 to Band 6 31.15 GHz
Band 6 to Band 7 41 GHz