Configuring the RF signal
R&S
®
SMM100A
391
User Manual 1179.1341.02 ─ 05
Initially the level control circuit uses a sample process to settle to the current level.
When settled, it continues level control with highest level accuracy.
●
"Off (Table)"
Deactivates internal level control loop. The instrument calculates every level setting
using the attenuation values from the internal (ALC) table. Level attenuation
between two table values is done with linear interpolation. This mode enables you
to perform a fast and strictly monotonic, but not quite as precise level adjustment.
●
"Table & On"
Starts with the associated value of the internal level table and then activates the
automatic level control. This mode achieves maximum level accuracy and fast set-
ting times.
The R&S
SMM100A displays the level control setting as a status message in the info
line.
How to: See
Chapter 7.12.2.2, "How to enable the ALC"
7.12.2.1
ALC settings
Access:
► Select "RF" > "RF Level" > "Automatic Level Control".
In the "ALC" dialog, you can configure the settings for the automatic level control of
the RF signal to achieve optimal accuracy.
The remote commands required to define these settings are described in
ter 13.16.16, "SOURce:POWer subsystem"
How to: See
Chapter 7.12.2.2, "How to enable the ALC"
Settings
Improving level performance
