Keysight Technologies N9340B, Руководство пользователя

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Making Measurements

Measuring Multiple Signals
42
Resolving Small Signals Hidden by Large
Signals
This example uses narrow resolution bandwidths to
resolve two input signals with a frequency separation of
50 kHz and an amplitude difference of 60 dB.
1 Connect two sources to the analyzer input connector
as shown in
Figure 4-3 on page 26
.
2 Set one source to 300 MHz at –10 dBm. Set the other
source to 300.05 MHz at –70 dBm.
3 Set the analyzer as follows:
• Press [PRESET]
• Press [FREQ] > 300.05 > {MHz}
• Press [SPAN] > 500 > {kHz}
• Press [BW/SWP] > 300 > {Hz}
4 Reduce the resolution bandwidth filter to view the
smaller hidden signal. Place a delta marker on the
smaller signal:
• Press [MARKER] > {Peak Search}
• Press [MARKER] > {Delta}
• Press [MARKER] > {Peak Search} > {Next Right PK}
or {Next Left PK}
Figure 4-4 Resolving small signal hidden by a large
signal