User`s guide
Table Of Contents
- Overview
- Getting Started
- System Setting
- Making Measurements
- Measuring Multiple Signals
- Measuring a Low-Level Signal
- Improving Frequency Resolution and Accuracy
- Making Distortion Measurements
- One-button Power Measurement
- Making a Stimulus Response Transmission Measurement
- Measuring Stop Band Attenuation of a Low-pass Filter
- Making a Reflection Calibration Measurement
- Measuring Return Loss Using the Reflection Calibration Routine
- Making an Average Power Measurement
- Key Reference
- SCPI Command Reference
- Error Messages
- Menu Map
4 Making Measurements
46 N9340A 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
connector as shown in Figure 3 on page 44.
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] > {Center Freq} > 300.05 > {MHz}
• Press [SPAN] > [500] > kHz.
• Press [BW/SWP] > {RBW} > 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 5 Resolving small signal hidden by a large signal