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Press
【
Peak
】
, [Next Peak] to put the delta marker on the peak of small signal.
Now, the frequency difference and amplitude difference of the two signals with difference amplitudes can be read, as shown in following
figure.
Figure 4-7: 1KHz RBW
4.4.
N dB Bandwidth Measurement
Following example uses a S1103 signal generator and generates a 500MHz, -10dBm continuous signal.
Example
1) Connect the signal generator output port to S3331 RF test port.
2) Press
【
Preset
】
key to return the instrument to default status
3) Set test frequency.
Press
【
FREQ
】
key
Select [Center FREQ] and input 500MHz
Press
【
SPAN
】
key
Select [Span] and input 1MHz
4) Press
【
BW/SWP
】
key
,
Select [Res BW Auto Man] and input 30kHz.
Now the signal trace is displayed on screen as shown in following figure.
5) Press
【
Marker
】
key, select [Next Page], select [Marker Function]