Ceyear 4041 Series, User Manual

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Chapter XI Performance Characteristics Test
144
11.6 RBW switching uncertainty
Description: Connect the RF output of synthesized signal generator to the input of spectrum analyzer, and adjust
the amplitude of output signal to make the signal below the spectrum analyzer reference level by 2 to 3 divisions.
Fix the amplitude of synthesized signal generator and change the RBW of spectrum analyzer to make the
difference between them equal to the RBW switching uncertainty. The RBW of spectrum analyzer 4041 is 1-3
steps.
A) Testing equipment
Signal generator 1464C
b) Adapter
2.4 mm (f)-2.4 mm (f) adapter * 2
c) Cable
BNC (m-m) cable * 1
2.4 mm (m-m) cable (1)
d) Test steps
Fig 11-6 RBW Switching Uncertainty Testing Setup
1) Connect the test device as shown in Fig 11-6. The spectrum analyzer provides a reference frequency for the
synthesized signal generator 1464C.
2) Set up the spectrum analyzer as follows:
Center frequency 2,000 MHz
Span .......................................................................................................................................................... 10 MHz
Logarithmic scale dB/div .......................................................................................................................... 1 dB
RBW ......................................................................................................................................................... Auto
RBW/VBW ............................................................................................................................................... 10
SPAN/RBW .............................................................................................................................................. 100
3) At this point, the RBW which is automatically associated with by spectrum analyzer is 100 kHz. Press
【
Peak
】
on the spectrum analyzer to set the marker to the peak and at the differential mode.
BNC cable
Synthesized
signal generator
Spectrum Analyzer
Adapter
10 MHz IN
2.4 mm cable
Adapter
10 MHz output