Ceyear 4041 Series, User Manual

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Chapter XI Performance Characteristics Test
169
attenuator is 30 dB, 40 dB and 50 dB.
10) Change the frequency setting of the signal generator, power meter and spectrum analyzer according to the
4041 Series Spectrum Analyzer Record Sheet , and repeat steps 5~9 until the test of all frequency points
needing the attenuator setting changes is completed.
Total level uncertainty (frequency response test)
11) Set the frequency of the signal generator 1464C to 500 MHz and the output power to -15 dBm.
12) Set the calibration factor frequency of the power meter to be the same as that of the signal generator, and
adjust the output power level of 1464C to make the power meter reading close to -25 dBm.
13) Set the center frequency of the spectrum analyzer to 500 MHz, reference level to -10 dBm, and attenuation to
0 dB, and repeat step 6.
14) Change the frequency setting of the signal generator 1464C, power meter and spectrum analyzer according to
the 4041 Series Spectrum Analyzer Record Sheet , and repeat steps 11~13 until the test of all frequency points
when the attenuation is 0 dB is completed.
11.17 Input attenuator
Description: The test is intended to measure the attenuation switching uncertainty within the 50 dB range of the
attenuator in the whole frequency band. The reference input of the synthesized signal generator is provided by 10
MHz of the spectrum analyzer. The switching uncertainty is set based on 0 dB attenuator.
A) Testing equipment
Synthesized signal generator 1464C
b) Adapter
2.4 mm (f)-2.4 mm (f) adapter * 2
c) Cable
BNC (m-m) cable×1 (120 cm)
2.4 mm (m-m) cable×1 (100cm)
d) Test steps
Fig 11-17 Input Attenuator Switching Uncertainty Testing Setup
1) Connect the test device according to Fig 11-17. The spectrum analyzer provides reference frequency for the
BNC cable
Synthesized
signal generator
Spectrum Analyzer
Adapter
10 MHz IN
2.4 mm cable
Adapter
10 MHz output