376 Chapter 8
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 Tuned RF Level value in Table 8-9 under TRFL Measured.
3. Repeat steps 1 and 2 and continue increasing the step attenuator value.
4. When the step attenuator is set to approximately 60 dB, the measuring receiver
will automatically calibrate range 2 before performing a measurement.
5. When the step attenuator is set to approximately 80 dB, the measuring receiver
will automatically calibrate range 3 before performing a measurement. This
will take about 5 minutes since the Range 3 Switch delay is set to ON.
6. When all attenuator steps have been measured, calculate the TRFL
measurement error by:
Error = TRFL Measured - Attenuator Cal Value. Fill in Error column of Table
8-9.
7. Compare the TRFL Error to the specification. Be sure to consider the ±
attenuator uncertainty.
NOTE If you wish to start a new series of measurements, and want to clear the Cal Factor
2 and Cal Factor 3 values, press
Measure Setup, and toggle the IF BW to 75 Hz
then back to 10 Hz. Press Set Reference again.
To Next Page
Loading...
Need help?
General
