Keysight N9038A, Service Manual, Page: 669 / 745

688 Keysight N9038A MXE Service Guide
Tests
Amplitude Accuracy - Preamp On
6. Preset the receiver by pressing Mode , Spectrum Analyzer , Mode Preset .
7. Set up the receiver by pressing:
Mode Setup , EMC Standard , None
Input/Output, More, Freq Ref In , External
FREQ Channel , Center Freq , 50 , MHz
SPAN X Scale , Span , 106 kHz
AMPTD Y Scale , More , Internal Preamp , Low Band
AMPTD Y Scale , Attenuation, Mech Atten, 0 dB
Sweep/Control , Sweep Setup , Swp Time Rules , SA - Accuracy
Meas Setup , Average/Hold Number , 20 , Enter
Trace/Detector , Trace Average
Single
8. Record the signal generator amplitude, as measured by the power meter,
in the Power Meter Amplitude column of Table 22-14 .
9. On the receiver, press Restart .
10. Wait for the instrument to finish averaging.
11. On the receiver press Peak Search.
12. Record the signal amplitude, as measured by the receiver in the Measured
Amplitude column of Table 22-14 .
13. Calculate the signal amplitude accuracy error using the following
equation, and record the results under the Amplitude Accuracy Error
column:
Amplitude Accuracy Error = Me 30 dB
−
Power_Meter
14. Perform the following steps for each row listed in Table 22-14 :
Table 22-14 Amplitude Accuracy Results (RF Input 1 - 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 ±1.30 dB