Trying Out the Instrument
R&S
®
FSPN
48
Getting Started 1179.4370.02 ─ 01
Test setup
DUT
R&S FSPN
RF / BB*
V
aux
V
tune
V
supply
required connections
optional connections
* = See text below for instructions on how to use the baseband input.
How to measure baseband noise at the RF input
For baseband noise measurements on the RF input, proceed as follows.
1. Connect the DUT to the RF input.
2. Perform a [PRESET].
The application automatically starts a continuous measurement and measures
the noise characteristics of the DUT in the default frequency range.
3. Select the "Baseband Noise" measurement via the [MEAS] key.
4. You can stop the measurement (to analyze the measurement data in detail)
with the [RUN SGL] or [RUN CONT] key; [RUN SGL] performs one more
measurement, then stops, [RUN CONT] stops immediately.
By default, two traces are displayed: the first trace shows the smoothed data
without spurs, the second trace the raw data including spurs.
Tip:
Integrated measurement results. Note that the "PM", "FM" and "Jitter"
results are always "0" for baseband noise measurements.
5.2.4
Adding Another Measurement Channel
Measuring the noise characteristics in two different measurement channels allows
you, for example, to capture and analyze two different data streams with different
measurement configurations.
Adding another measurement channel
1. Select the [MODE] key.
2. Select the "Phase Noise" item in the "Mode" dialog box.
Measurements
