Configuring the Signal in the RF Domain
R&S
®
SMW200A
473User Manual 1175.6632.02 ─ 16
Blanking
The instrument is equipped with a blanking circuit, which temporarily switches off the
RF signal whenever the frequency changes, until the signal has settled to a stable
state.
If you disable this function, the signal is not switched off during transition, but a tempo-
rary loss of power still occurs while the instrument adjusts the hardware. The power
level immediately increases and can exceed the set level value before the hardware
controls take effect. However, the time until the signal is stable and automatically level
controlled is shorter than the time of the blanking interval.
This setting applies to all operating modes with frequency transitions.
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 SMW starts signal generation by replaying
the stored values from the list. Thus, it achieves fast switching of the RF signal 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 thatR&S SMW 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.
Varying the RF Signal in List or Sweep Mode
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