R&S FSPN - Spot Noise Vs Tune Configuration; Trace Configuration

Common Measurement Settings
R&S
®
FSPN
130User Manual 1179.4363.02 ─ 01
6.8 Spot Noise vs Tune Configuration
Access (measurement): "Overview" > "Select Measurement" > "Spot Noise vs Tune"
The spot noise vs tune measurement determines the spot noise characteristics of a
DUT when you apply different input voltages or current (the tuning range or sweep
range). The DUT can be, for example, a voltage controlled oscillator (VCO) or a YIG
oscillator whose characteristic are a function of the applied current. The measurement
provides results for phase noise and AM noise characteristics at a certain input voltage
or current.
You can use all available DC sources as a sweep source (tuning source) or fix source
(V
supply
, V
tune
and V
aux
).
Most of the functionality for spot noise vs tune measurements is the same as in the
phase noise measurement. Differences and additional functionality are described in
this section of the documentation.
Refer to the following topics for more information about equivalent functionality.
●
Input configuration: Chapter 6.2, "Input Source", on page 99
●
Amplitude configuration and diagram scale: Chapter 6.3, "Level Characteristics",
on page 101
●
Frequency configuration: Chapter 6.4, "Frequency", on page 105
●
Noise configuration: Chapter 6.5.3, "Noise Configuration", on page 111
●
Spot noise configuration: Chapter 6.5.5, "Spot Noise Information", on page 119
●
Sweep configuration: Chapter 6.7.1, "Sweep Configuration", on page 127
Note: The "Fix Source" and "Frequency Resolution" settings are not available in
the spot noise vs tune measurement.
●
DC source configuration: Chapter 6.6, "DC Source Configuration", on page 123
●
Measurement configuration: Chapter 5.2, "Performing Measurements", on page 84
●
Limit line configuration: Chapter 7.5, "Limit Lines", on page 174
●
Marker configuration: Chapter 7.4, "Markers", on page 165
The one notable difference is the trace configuration, as described in this topic.
● Trace Configuration...............................................................................................130
6.8.1 Trace Configuration
Access: "Overview" > "Analysis" > "Traces" > "Traces"
Trace configuration is similar to that of other measurements with the following distinc-
tive features.
●
You can select the Trace Mode for each trace.
●
Each trace shows the noise characteristics at a certain spot noise offset over the
tuning range. You can customize the offset frequencies that a trace shows in the
"Spot Noise Offset" input fields.
By default, for example, trace 1 shows the noise measured for each tuning voltage
on a 1 kHz frequency offset.
Spot Noise vs Tune Configuration