Keysight N8973B User Manual

504 Keysight NFA Series Noise Figure Analyzers Service Guide
Functional Tests
Amplitude Accuracy at 50 MHz
Testing Preamp Option (P03, P07, P26, P44)
Instruments containing Options P03, P07, P26, P44 must have the preamp
function turned on and tested.
Procedure
1. On the analyzer, press MODE/MEAS, Spectrum Analyzer, OK, AMPTD,
Signal Path, Internal Preamp, Low Band.
2. Connect the equipment as shown in Figure 17-4 on page 502, using a
30 dB Pad between the adapter and the signal analyzer input.
3. Set the synthesized sweeper amplitude to the value listed in the Nominal
Source Amplitude column in Table 17-7.
4. Set the signal analyzer input attenuation to 0 dB.
5. Set the Span as listed in Table 17-7.
6. Record the source amplitude, as measured by the power meter, in the
Power Meter Amplitude column of Table 17-7.
7. On the signal analyzer, press Restart.
8. Wait for the analyzer to finish averaging.
9. Press Peak Search.
10.Record the signal amplitude as measured by the analyzer in the measured
amplitude column of Table 17-7.
11.Calculate the signal amplitude accuracy using the following equation:
Amplitude Accuracy Error = Meas_amp + 30 dB - Power_meter
12.Record the results under the Amplitude Accuracy Error column of Table
17-7
Table 17-7 Amplitude Accuracy Results (Option P03, P07, P26, P44)
Nominal
Source
Amplitude
(dBm)
Low- band
Preamp
Res BW
(kHz)
Span
(kHz)
Measured
Amplitude
Meas_amp
(dBm)
Power Meter
Amplitude
Power_meter
(dBm)
Amplitude
Accuracy
Error
(dB)
Test Limit
(dB)
-13 ON 1 106 ±1.30 dB

Keysight N8973B Specifications

General

Brand	Keysight
Model	N8973B
Category	Measuring Instruments
Language	English