Ceyear 4041 Series, User Manual

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Chapter XI Performance Characteristics Test
141
7) Record the frequency difference Δf and calculate the span accuracy as follows:
Span accuracy = 100×[Δf-(0.8×span)]/(0.8×span)% (2)
Record the result in the corresponding item in the 4041 Series Spectrum Analyzer Record Sheet.
8) Turn off all frequency markers, set the span of spectrum analyzer and the frequency of signal generator
according to the span of spectrum analyzer in the record, and repeat steps 3 to 8 until all the span tests are
completed.
11.4 Sweep time
Description: The amplitude modulation signal is displayed on the spectrum analyzer under a zero span, and the
frequency of modulation signal is adjusted so that the peak intervals are uniformly distributed on the screen.
Count the frequency of modulation signal and calculate the actual sweep time, and then compare it with the
specified time to obtain the sweep time accuracy. The sweep time accuracy is guaranteed by design. To reduce the
test time, the typical sweep time test is selected for verification.
Note: The synthesized signal generator and function generator may also be replaced by the synthesized signal
generator with the built-in AM option.
A) Testing equipment
Synthesized signal generator 1464C
Function generator Agilent 33250A
b) Adapter
2.4 mm (f)-2.4 mm (f) adapter * 2
c) Cable
BNC (m-m) cable * 2
One 2.4 mm (m-m) cable
d) Test steps
Fig 11-4 Sweep Time Accuracy Testing Setup
1) Connect the test device as shown in Fig 11-4. The output of function generator is connected to the amplitude
Synthesized
signal generator
Spectrum
Analyzer
Adapter
10 MHz input
2.4 mm cable
Function
generator
BNC cable
AM IN
BNC cable
Adapter
10 MHz output