HP ESA-L1500A, Руководство пользователя и калибровки

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306 Chapter 9
Performance Verification Tests
24. Non-Harmonic Spurious Outputs, Options 1DN and 1DQ
17.Calculate the difference between the amplitude of marked signal
and the fundamental amplitude as listed in Table 9-27 .
For example, if the fundamental amplitude for a fundamental
frequency of 10 MHz is +1.2 dBm and the marker amplitude is
−
40.8 dBm, the difference is
−
42 dBc.
Record this difference as the non-harmonic response amplitude for the
appropriate spectrum analyzer center frequency and microwave
spectrum analyzer start and stop frequency settings in
Table 9-28 .
18.If a true non-harmonic spurious response is not found, record
“NOISE” as the non-harmonic response amplitude in Table 9-28 for
the appropriate spectrum analyzer center frequency and microwave
spectrum analyzer start and stop frequency settings.
19.Repeat step 13 through step 18 for the remaining microwave
spectrum analyzer settings for start frequency, stop frequency, and
resolution bandwidth; and for the spectrum analyzer center
frequency setting of 10 MHz.
20.Repeat step 12 through step 19 with the spectrum analyzer center
frequency set to 750 MHz.
21.Repeat step 12 through step 19 with the spectrum analyzer center
frequency set to 1.5 GHz.
22.Locate in Table 9-28 the most-positive non-harmonic response
amplitude. Record this amplitude as the highest non-harmonic
response amplitude in TR Entry 1 of the performance verification
test record.
Table 9-28 Non-Harmonic Responses Worksheet
a. 75
Ω
RF outputs: Omit this frequency range.
b. 75
Ω
RF outputs: Set the start frequency to 1 MHz.
Non-Harmonic Amplitude Marker Amplitude Fundamental Amplitude – =
Microwave Spectrum
Analyzer Settings
Non-Harmonic Response Amplitude (dBc)
Start
Freq
(MHz) Stop
Freq
(MHz) Resolution
Bandwidth at 10 MHz
Center Freq at 750 MHz
Center Freq at 1.5 GHz
Center Freq
9 kHz
a
0.1
a
300 Hz
a
0.1
b
5.0 10 kHz
5.0 55 100 kHz
55 1240 1 MHz
1240 1500 1 MHz