Making Basic Measurements Using Spectrum Analyzer Mode

Measuring low-level Signals Using Attenuation, Video Bandwidth, and Video Averaging

Example: The resolution bandwidth can be decreased to view low-level signals.

1.As in the previous example, connect an antenna to the spectrum analyzer input. Set the spectrum analyzer to view a low-level signal.

2.Press IBW) then m. The low-level signal appears more clearly because the noise level is reduced. See Figure 4-17.

0.16.32 JUL 30. IQ93

 

 

 

 

 

 

 

 

MKR

100.13

MHZ

 

 

 

#AT 20 dB

-2.78

 

dml”

PEAK

 

 

 

 

 

LOG

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

 

“IO BW

 

 

 

 

 

 

 

 

 

 

 

 

dB/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

m MAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30 CHZ

 

 

 

 

 

WA SE

SC FL

CORF

EM1 BW

 

SPAN

10 00

MHZ

“EM 30 KHZ

SWP

33 3

m5et

Figure 4-17. Decreasing Resolution Bandwidth

A “#” mark appears next to the RES BW annotation at the lower-left corner of the screen, indicating that the resolution bandwidth is uncoupled.

As the resolution bandwidth is reduced, the sweep time is increased to maintain calibrated data.

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