Ceyear 4041 Series, User Manual

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Chapter XI Performance Characteristics Test
145
4) Set the span of spectrum analyzer according to the resolution of corresponding item in the 4041 Series
Spectrum Analyzer Record Sheet, and set the ratio between the span and RBW to 100.
5) Search for the peak and read out the amplitude differential of marker, and record it in the 4041 Series Spectrum
Analyzer Record Sheet as the current RBW conversion uncertainty
6) Repeat the steps 4~5 until all RBWs are tested.
11.7 Sideband noise
Description: Sideband noise is an indicator of the short-term stability of the local oscillation signal frequency of
spectrum analyzer.
Measure the sideband noise of the reference signal (1.0 GHz, 0 dBm) at the offset carrier of 10 kHz, 100 kHz, 1
MHz and 10 MHz. Average the sideband noises at various frequency offset points with the noise marker and
video averaging function. In case of the spurious response at the set frequency offset, deviate the marker from the
spurious response to ensure the accuracy of measurement.
A) Testing equipment
Synthesized signal generator 1464C
b) Adapter
Two 2.4 mm (f)-2.4 mm (f) adapters
c) Cable
BNC (m-m) cable * 1
2.4 mm (m-m) cable (1)
d) Test steps
Fig 11-7 Diagram of sideband noise test
1) Connect the test instrument as shown in Fig 11-7. The spectrum analyzer provides a reference frequency for
the synthetic signal generator.
2) Set the output frequency of signal generator to 1 GHz and the output power to 0 dBm;
3) Set the spectrum analyzer as follows:
【
Freq
】
to 1 [GHz], [Span] to 30 [kHz], and
【
Ampt
】
[Ref Level]
to 0[dBm].
4) Press
【
Peak
】
,
【
Marker
】
, [Detla] on the spectrum analyzer, set the differential marker to 10 kHz, and turn
BNC cable
Synthesized
signal generator
Spectrum Analyzer
Adapter
10 MHz IN
2.4 mm cable
Adapter
10 MHz output