Ceyear 4041 Series, User Manual

Page: 162 / 203

Chapter XI Performance Characteristics Test
150
reference level to -20 dBm, and the preamplifier \OFF, with others left unchanged.
40) Repeat step 3 to step 4.
41) Read out the peak value where the marker locates as the displayed average noise level of the 32 GHz to 40
GHz band when the preamplifier is off, and record it in the corresponding test item of "4041 Series Spectrum
Analyzer Record Sheet". Disable the noise marker and averaging function.
Displayed average noise, preamplifier off (40 GHz~44 GHz)
42) Set the start frequency of the 4041 series spectrum analyzer to 40 GHz, the stop frequency to 44 GHz, the
reference level to -20 dBm, and the preamplifier \OFF, with others left unchanged.
43) Repeat step 3 to step 4.
44) Read out the peak value where the marker locates as the displayed average noise level of the 40 GHz to 44
GHz band when the preamplifier is off, and record it in the corresponding test item of "4041 Series Spectrum
Analyzer Record Sheet". Disable the noise marker and averaging function.
11.9 Second harmonic distortion
Description: When the signal is input into a nonlinear device (such as a mixer, amplifier, etc.), the nonlinear
device will generate the harmonics of the input signal, and the unwanted second harmonic component attached to
the signal is called the second harmonic distortion.
The synthesized signal generator provides a signal to the spectrum analyzer to measure the second harmonic
distortion via a low pass filter. The low pass filter is used to eliminate any harmonic distortion from the signal
source. The spectrum analyzer provides a 10 MHz reference frequency for the synthesized signal generator.
A) Testing equipment
Synthesized signal generator 1464C
1.0 GHz low pass filter * 1
6.8 GHz low pass filter * 1
18 GHz low pass filter * 1
b) Adapter
2.4 mm (f)-3.5 mm (f) adapter * 1
2.4 mm (f)-3.5 mm (m) adapter * 1
3.5 mm (f)-3.5 mm (f) adapter * 1
c) Cable
BNC (m-m) cable * 1
3.5 mm (m-m) cable * 1
d) Test steps