Agilent Technologies PSA Series Manual page 369

10. On the PSA, press
to control when the measurement is taken so you can assure the proper step
attenuation is set before beginning the measurement. You will need to press the
Restart
Do not Preset the PSA, or use the Frequency Counter function. If you do, the
NOTE
instrument will require at least 30 minutes for stabilization.
Perform the following steps for each measurement value:
1. Change the step attenuator to the next higher value and press the
2. Record the measured value in
3. Set the step attenuator back to 0 dB (the reference setting). If the displayed
reference is within 0.002 dB of zero keep the recorded result and continue. If
the displayed reference is greater than 0.002 dB, press the
the measurement over.
4. Repeat steps 1 through 3 and continue increasing the step attenuator value.
5. When all attenuator steps have been measured, calculate the linearity error by:
Error = Attenuator Measured - Attenuator Cal Value. Fill in Linearity Error
column of
6. Compare the linearity error to the specification. Be sure to consider the ±
attenuator uncertainty when determining pass or fail.
Table 8-4
Reference Attenuator Cal Data
S/N
Atten
Calibration
Value
(dB)
0
Chapter 8
N5531S Measuring Receiver Performance Verification
Measure Control
key each time you want to make a measurement.
Table 8-4
Table 8-4.
Measurement Test Record
Atten Attenuator
Uncert Measured
(± dB) (dB)
0 0
Performance Verification Tests
, select . This will allow you
Measure Single
under Attenuator Measured.
Set Ref
Linearity Error
(dB)
(Attenuator Measured −
Atten Cal value)
0
key.
Restart
key and start
Specification
(± dB)
0
0.014
0.019
0.024
0.029
0.034
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