User`s guide

4 Making Measurements
42 N9340B User’s Guide
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 con-
nector as shown in Figure 4- 3 on page 40.
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 4-5 Resolving small signal hidden by a large signal