Configuring the RF signal
R&S
®
SMM100A
335
User Manual 1179.1341.02 ─ 05
Blanking
The instrument applies
blanking
, which temporarily turns off the RF signal when the
frequency or level changes, until the signal has settled to a stable state.
Temporary blanking applies to all operating modes.
Learn List Mode Data list processing mode
Before signal generation starts, the instrument reads the values of the data list in
sequence and determines the corresponding hardware settings for each value pair.
Along with the current RF state and the modulation settings, the function stores the list
data in the temporary memory.
Once the entire table is processed, the R&S
SMM100A starts signal generation by
replaying the stored values from the list. Thus, it achieves fast switching of the RF sig-
nal with high accuracy.
This mode provides optimized switching times, and is particularly useful if dwell times
of less than 2 ms are required.
However, consider that R&S
SMM100A generates the signal from the saved data, thus
reflecting the state of the instrument at the time of recording. Modifications of settings
during list processing are ignored. If you turn off the instrument, the list file remains
saved on the internal memory, but not the learned data in the temporary memory.
When to use the "Learn List Mode Data" function
The instrument performs the learning process in the following situations:
●
RF state is on (prerequisite)
●
You deliberately activate this function, provided a list is loaded and RF is on.
●
You switch list mode on in "Learned" run mode and no data is available in the
memory
●
You change the list data file
Perform the list mode learning in the following situations:
●
Always when:
–
You change any value in the list.
–
Any hardware setting changes.
Especially if you have fluctuating environmental conditions, the hardware set-
tings need to be adjusted.
●
We recommend that you learn the list before activating the list mode, even if the list
has been learned previously.
Live list processing mode
The R&S
SMM100A generates the signal directly from the value pairs in the database,
and adjusts the hardware settings accordingly. The current instrument state and thus
any change during the signal generation directly affects the RF signal. The temporary
memory is not used.
Varying the RF signal in list or sweep mode
