Keysight N9038A MXE Service Guide 689
Tests
Amplitude Accuracy - Preamp On
RF Input 2 - Preamp On
15.Move the power splitter from RF Input 1 to RF Input 2.
16.Select RF Input 2 on the receiver by pressing Input/Output, RF Input, RF
Input Port, RF Input 2.
17.Record the signal generator amplitude, as measured by the power meter,
in the Power Meter Amplitude column of Table 22-15.
18.On the receiver, press Restart.
19.Wait for the instrument to finish averaging.
20.On the receiver press Peak Search.
21.Record the signal amplitude, as measured by the receiver in the Measured
Amplitude column of Table 22-15.
22.Calculate the signal amplitude accuracy error using the following
equation, and record the results under the Amplitude Accuracy Error
column of Table 22-15:
Amplitude Accuracy Error = Meas_Amp + 30 dB − Power_Meter
Table 22-15 Amplitude Accuracy Results (RF Input 2 - Preamp Off)
Nominal
Source
Amplitude
(dBm)
Measured
Amplitude
(dBm)
Meas_amp
Power Meter
Amplitude
(dBm)
Power_meter
Amplitude
Accuracy
Error
(dB)
Test Limit
(dB)
−13 ±1.33 dB