Chapter 8 369
N5531S Measuring Receiver Performance Verification
Performance Verification Tests
N5531S Measuring Receiver Performance
Verification
10. On the PSA, press Measure Control, select Measure Single. This will allow you
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 key each time you want to make a measurement.
NOTE Do not Preset the PSA, or use the Frequency Counter function. If you do, the
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
Restart key.
2. Record the measured value in Table 8-4 under Attenuator Measured.
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
Set Ref key and start
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 Table 8-4.
6. Compare the linearity error to the specification. Be sure to consider the ±
attenuator uncertainty when determining pass or fail.
Table 8-4 Measurement Test Record
Reference Attenuator Cal Data
S/N
Atten
Calibration
Value
(dB)
Atten
Uncert
(± dB)
Attenuator
Measured
(dB)
Linearity Error
(dB)
(Attenuator Measured −
Atten Cal value)
Specification
(± dB)
000 0 0
0.014
0.019
0.024
0.029
0.034
To Next Page
Loading...
Need help?
General
