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49 SNA5000A Vector Network Analyzer User Manual
2.8.3 IF Bandwidth
The received signal of VNA is converted from its source frequency to a lower intermediate
frequency (IF). Reducing the IF receiver bandwidth reduces the effect of random noise on a
measurement. Each tenfold reduction in IF bandwidth lowers the noise floor by 10 dB. However,
narrower IF bandwidths cause longer sweep times.
IF Bandwidth setting:
1. Using the Softkey for setting: Press the ”Avg BW” key, Press “Avg BW” > Averaging > IF
Bandwidth > Enter the IF Bandwidth value.
Figure 2-9 Set the IF from the menu bar
2. Using a mouse for setting: Click the "BW=xx" icon on the menu bar and select IF
Bandwidth.
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