R&S SMA100B - Page 219

Improving level performance
R&S
®
SMA100B
219User Manual 1178.3834.02 ─ 09
Settings
State............................................................................................................................219
Detector Sensitivity..................................................................................................... 219
Detector Coupling Factor............................................................................................ 219
Required Generator Level...........................................................................................219
State
Selects the internal level control mode.
"Auto"
Selects the most appropriate ALC mode automatically.
"On"
Activates ALC permanently.
"Off (Table)"
Controls the level using the attenuation values of the internal ALC
table.
"Table & On"
Starts with the attenuation setting from the internal ALC table and
continues with automatic level control.
"External ALC"
Activates the external detector ALC mode.
For further details on the individual settings, an overview of the functionality and details
on what is to be considered, see "ALC states and their effects" on page 217.
Remote command:
[:SOURce<hw>]:POWer:ALC[:STATe] on page 683
Detector Sensitivity
Determines the path of the internal level detector.
The level detector of the ALC has multiple paths distinguished by their sensitivity.
"Auto"
Selects the detector path automatically, according to the given level.
This mode is the recommended operation mode.
"Fix"
Fixes the last set sensitivity setting.
Remote command:
[:SOURce<hw>]:POWer:ALC:DSENsitivity on page 683
Detector Coupling Factor
Option: R&S SMAB-K726
Sets the attenuation value for the external RF coupler of the external ALC.
See Chapter 8.2.2, "How to set up an external ALC", on page 220
Remote command:
[:SOURce<hw>]:POWer:ALC:EDETector:FACTor on page 684
Required Generator Level
Option: R&S SMAB-K726
Sets the maximum power level at the RF output required to compensate external cou-
pler and cable losses of the external ALC.
See Chapter 8.2.2, "How to set up an external ALC", on page 220
Automatic level control (ALC)