Ceyear 4041 Series, User Manual

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Chapter XI Performance Characteristics Test
143
error of RBW itself.
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
One 2.4 mm (m-m) cable
d) Test steps
Fig 11-5 RBW Accuracy Testing Setup
1) Connect the test instrument as shown in Fig 11-5. 1) The spectrum analyzer provides a reference frequency for
the signal generator.
2) Set the synthesized signal generator as follows: frequency: 100 MHz, power:-2 dBm and power step: 1 dB.
3) Reset the spectrum analyzer and press the [measure] [OBW] key to turn on the measured bandwidth. The
measurement method selects X dB and changes X to -3.01 dB.
4) Set the spectrum analyzer as follows: center frequency: 100 MHz, span: 30 MHz, amplitude scale: 1 dB/div,
RBW: 10 MHz, with other items as the system default settings.
5) Adjust the output power of the synthesized signal generator to make the signal below the reference level by 2 to
3 divisions.
6) Search the peak for the 4041 series, records the 3 dB bandwidth marker differential reading Δf
-3dB
at this time,
calculate the RBW accuracy δ as follows, and fills in the calculated results to the corresponding item in the 4041
Series Spectrum Analyzer Record Sheet.
3
100%
dB
f RBW
RBW


 
 
(5)
7) Set the spectrum analyzer according to the RBW listed in the item
“
RBW accuracy
”
in the4041 Series Spectrum
Analyzer Record Sheet, set the bandwidth to approximately double the RBW, and repeat steps 6-7 until all RBW
tests are completed.
10 MHz output
BNC cable
Synthesized
signal generator
Spectrum Analyzer
Adapter
10 MHz IN
2.4 mm cable
Adapter
10 MHz output