R&S FSVA3000 Series, Руководство пользователя

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Measurements and Results
R&S
®
FSVA3000/ R&S
®
FSV3000
238 User Manual 1178.8520.02 ─ 01
The following tasks are described:
●
"To select an SEM measurement" on page 238
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"To perform an SEM measurement according to a standard" on page 238
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"To configure a user-defined SEM measurement" on page 238
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"To perform an MSR SEM measurement" on page 239
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"To perform a Multi-SEM measurement" on page 240
For remote operation, see Chapter 14.5.6.11, "Example: SEM Measurement" ,
on page 823.
To select an SEM measurement
► Press the [MEAS] key, then select the "Spectrum Emission Mask" measurement.
To perform an SEM measurement according to a standard
► Load the settings file as described in "How to load an SEM settings file"
on page 241 and start a measurement.
To configure a user-defined SEM measurement
1. Define the span of the signal you want to monitor in the general span settings.
2. Split the frequency span of the measurement into ranges for signal parts with simi-
lar characteristics.
Starting from the center frequency, determine which sections of the signal to the
left and right can be swept and monitored using the same parameters. Criteria for
such a range definition may be, for example:
● The signal power level
● The required resolution bandwidth or sweep time
● Transducer factors
● Permitted deviation from the defined signal level, i.e. the required limit values
for monitoring
If the signal consists of a transmission channel and adjacent channels, the channel
ranges can usually be used for the range definition.
3. If the signal power level to be monitored varies and the limits vary, define power
classes. For each range of levels that can be monitored in the same way, define a
power class.
a) Select the "Overview" softkey.
b) Select the "SEM Setup" button.
c) Switch to the "Power Classes" tab.
d) To add a power class, select the "Add" button.
e) Enter the start and stop power levels to define the class.
Spectrum Emission Mask (SEM) Measurement