Measurements and results
R&S
®
FSVA3000/ R&S
®
FSV3000
138
User Manual 1178.8520.02 ─ 08
After each sweep is completed, a new one is started automatically. While the mea-
surement is running, the [RUN CONT] key is highlighted. To stop the measure-
ment, press the [RUN CONT] key again. The key is no longer highlighted. The
results are not deleted until a new measurement is started.
5.2.3
Measurement examples - measuring a sinusoidal signal
One of the most common measurement tasks that can be handled using a signal ana-
lyzer is determining the level and frequency of a signal. When measuring an unknown
signal, you can usually start with the presettings.
Test setup
1. Configure the signal generator (e.g. R&S
SMW):
●
Frequency
:
128 MHz
●
Level
:
-30 dBm
2.
NOTICE!
Signal levels exceeding 30
dBm can damage the RF attenuator or the
input mixer. When calculating the expected power level, consider the total power of
all occuring signals.
If you measure signals higher than +30 dBm (=1
W), insert a power attenuator
before the RF input of the analyzer.
3. Connect the RF output of the signal generator to the RF input of the R&S
FSV/A.
Measuring the level and frequency using markers
................................................138
Measuring the signal frequency using the signal counter
..................................... 140
5.2.3.1
Measuring the level and frequency using markers
The level and frequency of a sinusoidal signal can be measured easily using the
marker function. The R&S
FSV/A always displays its amplitude and frequency at the
marker position. The frequency measurement uncertainty is determined by the refer-
ence frequency of the R&S
FSV/A, the resolution of the marker frequency display and
the number of sweep points.
1. Select [PRESET] to reset the instrument.
2. Connect the signal to be measured to the "RF INPUT" connector on the
R&S
FSV/A.
3. Set the center frequency to
128
MHz
.
4. Reduce the frequency span to
1
MHz
.
Note:
Coupled settings. When the frequency span is defined, the resolution band-
width, the video bandwidth and the sweep time are automatically adjusted,
because these functions are defined as coupled functions in the presettings.
Basic measurements
