N9030B PXA Signal Analyzer Service Guide 587
Functional Tests
Amplitude Accuracy at 50 MHz
Sweep/Control, Sweep Setup, Swp Time Rules, SA - Accuracy
Meas Setup, Average/Hold Number, 20, Enter
Trace/Detector, Trace Average
Single
7. Perform the following steps for each row listed in Table 18-5:
a. Set the synthesized sweeper amplitude to the value listed in the
Nominal Source Amplitude column in Table 18-5.
b. Set the Mech Atten as indicated in the Attenuation column in Table
18-5.
c. Set the Span as listed in the Span column of Table 18-5.
d. Record the synthesized sweeper amplitude, as measured by the
power meter, in the Power Meter Amplitude column of Table 18-5.
e. On the signal analyzer, press Restart.
f. Wait for the signal analyzer to finish averaging.
g. Press Peak Search.
h. Record the signal amplitude, as measured by the analyzer in the
Measured Amplitude column of Table 18-5.
i. Calculate the signal amplitude accuracy error using the following
equation, and record the results under the Amplitude Accuracy
Error column:
Amplitude Accuracy Error = Meas_amp - Power_meter
Table 18-5 Amplitude Accuracy Results
Nominal
Source
Amplitude
(dBm)
Attenuation
(dB)
Span
(MHz)
Measured
Amplitude
Meas_amp
(dBm)
Power Meter
Amplitude
Power_meter
(dBm)
Amplitude
Accuracy
Error
(dB)
Test Limit
(dB)
-4 10 2 ±1.13 dB
-9 10 1 ±1.13 dB
-14 10 0.5 ±1.13 dB
-4 20 0.1 ±1.13 dB
-14 20 0.1 ±1.13 dB
-4 30 0.1 ±1.13 dB
-14 30 0.1 ±1.13 dB
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