Rohde & Schwarz SGU100A, User Manual, Page: 79 / 236

Upconverter Settings
R&S
®
SGU100A
77 User Manual 1176.7726.02 ─ 09
Mode
Sets the attenuator mode at the RF output.
"Auto" Standard mode.
The electronically switching attenuator switches with a ~ 6 dB step
width at optimized switching points. The entire level range is availa-
ble. The level setting is performed by continuous electronic level con-
trol combined with switching the step attenuator.
"Fixed" The level settings are made without switching the attenuator. When
this operating mode is switched on, the attenuator is fixed in the cur-
rent position to provide level settings without interruption. The result-
ing variation range is defined and displayed under
Level Range .
Note: The function is effective when automatic level control is activa-
ted ("ALC State = On"). If the normal variation range is overranged or
underranged, level errors increase considerably and the warning
"Level under/overrange" appears in the info line. The spectral purity
of the output signal decreases with high attenuation.
Remote command:
:OUTPut:AMODe
on page 167
Level Range
If "Attenuator > Mode = Fixed" is selected, displays the level range in which the level is
set without interruption.
Remote command:
:OUTPut:AFIXed:RANGe:LOWer?
on page 168
:OUTPut:AFIXed:RANGe:UPPer?
on page 168
SATT Switch-Over Offset
Sets the switch-over offset value of the attenuator.
Remote command:
[:SOURce]:POWer:ATTenuation:SOVer[:OFFSet]
on page 175
RF-Off-Mode
Determines the attenuator's state after the instrument is switched off.
In default setting, the electronic step attenuator switches to highest attenuation when
RF is off. By setting the RF-Off mode, the electronic step attenuator can be fixed to
keep the output impedance constant during RF off.
Remote command:
[:SOURce]:POWer:ATTenuation:RFOFf:MODE
on page 175
Level and Power-On Settings