Rohde & Schwarz SMBV100A, Руководство пользователя

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Instrument Function
R&S
®
SMBV100A
177 Operating Manual 1407.6062.32 ─ 08
Fixed Range (PEP) In
Displays the level range in which the level is set without interruption for the "Attenuator
Mode fixed" setting.
SCPI command:
​
:
​
OUTPut<hw>:
​
AFIXed:
​
RANGe:
​
UPPer
​
on page 483
​
:
​
OUTPut<hw>:
​
AFIXed:
​
RANGe:
​
LOWer
​
on page 483
RF OFF Mode
Selects the attenuator mode, when the RF signal is switched off.
The setting of the RF OFF mode is not affected by an instrument preset (PRESET key),
*RST
and the "Save/Recall" function. This parameter is influenced only by the
​
Factory
Preset .
"Unchanged" Freezes the setting of the attenuator when RF is switched off. The
attenuator is only activated when RF is switched on.
This setting recommended if a constant VSWR (
V oltage S tanding W ave
R atio) is required.
"Full Attenua-
tion" Sets attenuation to maximum when the RF signal is switched off. This
setting is recommended for applications that require a high level of
noise suppression.
SCPI command:
​
[:
​
SOURce<hw>]:
​
POWer:
​
ATTenuation:
​
RFOFf:
​
MODE
​
on page 676
User Variation
If the level is set using the rotary knob, the step width is defined in the "User Variation"
section.
Variation Active
Activates the user-defined step width used when varying the level value with the rotary
knob.
"ON" The level value set with the rotary knob is varied using the user-defined
step width which is entered under "Variation Step".
"OFF" The level value set with the rotary knob is varied in steps of one unit at
the cursor position (standard operating mode).
SCPI command:
​
[:
​
SOURce<hw>]:
​
POWer:
​
STEP:
​
MODE
​
on page 683
Variation Step
Sets the user-defined step width for entering the RF level using the rotary knob. Level
variation with this step width must also be activated with "Variation Active".
SCPI command:
​
[:
​
SOURce<hw>]:
​
POWer:
​
STEP[:
​
INCRement]
​
on page 683
RF Signal and Analog Modulations - RF Block