User Manual

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
315User Manual 1178.3370.02 ─ 03
Remote command:
MMEMory:STORe<n>:LIST on page 812
FORMat:DEXPort:DSEParator on page 786
7.2.6.6 How to Perform a Spectrum Emission Mask Measurement
SEM measurements can be performed according to a specific standard or freely con-
figured. Configuration for signals with a regular channel definition can be configured
quickly and easily. Selecting the SEM measurement is a prerequisite for all other tasks.
For signals with multiple carriers, also in non-contiguous ranges, an SEM measure-
ment with multiple sub blocks can be configured.
The following tasks are described:
●
"To select an SEM measurement" on page 315
●
"To perform an SEM measurement according to a standard" on page 315
●
"To configure a user-defined SEM measurement" on page 315
●
"To perform a Multi-SEM measurement" on page 317
For remote operation, see Chapter 8.6.6.10, "Example: SEM Measurement",
on page 587.
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 317 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.
Measurements and Results