R&S SMJ100A, Operating Manual

Page: 238 / 874

Instrument Function
R&S
®
SMJ100A
222 Operating Manual 1403.7458.32 ─ 14
State - ALC
Activates/deactivates internal level control.
"Auto" The instrument selects the most appropriate ALC mode automati-
cally.
ALC is on in most operating conditions. Default state.
"On" Activates ALC, regardless of the operating conditions.
"Off (Sample & Hold)"
Deactivates internal level control.
Sample & hold closes the level control loop at every frequency and
level change for a short period of time. The level control voltage is
sampled and then clamped.
Remote command:
[:SOURce<hw>]:POWer:ALC[:STATe]
on page 763
Search Once - ALC
Forces the generator to execute level adjustment once, although the "Sample & Hold"
mode is active.
Remote command:
[:SOURce<hw>]:POWer:ALC:SONCe
on page 763
Protect RF Output - ALC
The signal is attenuated for about 40 dB to protect external devices against internal
signals, if the following prerequisites are fulfilled
●
ALC state is On or AUTO
●
High-Power Mode is Off
●
I/Q Modulator is On
●
Baseband is armed
Remote command:
:OUTPut<hw>:PROTection:STATe
on page 556
5.5.8 User Correction
The "User Correction" function is used to create and activate lists in which level correc-
tion values predefined by the user are freely assigned to RF frequencies. Correction is
performed by the user-defined table values being added to the output level for the
respective RF frequency.
With frequencies which are not contained in the list, the level correction is determined
by interpolation of the closest correction values.
RF Signal and Analog Modulations - RF Block