China Electronics Technology Instruments AV3672 Series, User Manual

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6 Measurement Optimization
6.6 Reduction of Trace noise
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sweep points of the test.)
Fig. 6.15 Setting of Smoothing
6.6.3 Intermediate Frequency Bandwidth
You can reduce the bandwidth of the intermediate frequency receiver so as to reduce the influence of random noise
in measurement.
Once the intermediate frequency bandwidth is reduced by 10 times, the base noise will be
reduced by 10dB.
However, if the intermediate frequency bandwidth is small, the sweep time will be long. The
signal received by the analyzer will be changed into the intermediate frequency (7.606MHz) from the network
analyzer can change the received signal from the RF/microwave frequency into the intermediate frequency
(7.606MHz). The bandwidth of the intermediate frequency band pass filter can be reduced from 5MHz to 1Hz
(min.). The intermediate frequency bandwidth can be independently set for each channel or in segment sweep.
1) Reduction of influence of intermediate frequency bandwidth
The influence of the intermediate frequency bandwidth on measurement results is shown in Fig. 6.16.
Fig. 6.16 Influence of Intermediate Frequency Bandwidth on Measurement Results
2) Setting of intermediate frequency bandwidth
Menu path: [Response] > [Avg] > [IF Bandwidth...] .
Directly enter the value in the [Intermediate frequency bandwidth] dialog box or select the value with the arrow
button.