Rohde & Schwarz SMBV100A, Руководство пользователя

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Remote Control Commands
R&S
®
SMBV100A
676 Operating Manual 1407.6062.32 ─ 08
[:SOURce<hw>]:POWer:ATTenuation:RFOFf:MODE <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 .
Parameters:
<Mode> UNCHanged | FATTenuation
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.
FATTenuation
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.
*RST:
FATTenuation
Example: SOUR:POW:ATT:RFOF:MODE FATT
sets the RF OFF attenuator to maximum.
[:SOURce<hw>]:POWer[:LEVel][:IMMediate][:AMPLitude] <Amplitude>
The command sets the RF output level in CW mode. In addition to numerical values, it
is also possible to specify
UP
and
DOWN
. The level is then increased or decreased by the
value specified under
[SOURce<hw>:]POWer:STEP
.
As with the Level value entered in the header, the
OFFSet
value is also taken into con-
sideration with this command.
The specified value range is therefore only effective if
:SOURce:POWer:OFFSet
is set
to 0. The value range for other
OFFSet
values can be calculated using the following
formula:
Minimum level +
OFFSet
... Maximum level +
OFFSet
The keywords of this command are largely optional. Therefore, both the long and short
form of the command are shown in the example.
Parameters:
<Amplitude> Minimum level ... Maximum level
The value range for the level setting varies according to the instru-
ment model.
The values are given in the data sheet.
Increment: 0.01 dB
*RST:
-30 dBm
Default unit: dBm
SOURce Subsystem