Remote Control Commands
R&S
®
SMC100A
256
Operating Manual 1411.4060.32 ─ 04
......................................................................261
[:SOURce<hw>]:FREQuency:CENTer
<Center>
The command sets the center frequency of the sweep. This setting in combination with
the span setting (
[SOURce:]FREQuency:SPAN
) defines the sweep range.
This command is linked to the commands
[SOURce:]FREQuency:STARt
and
[SOURce:]FREQuency:STOP
, i.e. changing these values causes the CENTer value to
change, and vice versa:
CENTer = (STARt + STOP)/2
As with the "Frequency" value entered in the header, the
OFFSet
value is also taken into
consideration with this command. The specified value range is therefore only effective if
OFFSet
is set to 0. The value range for other
OFFset
values can be calculated using
the following formula:
300 kHz +
OFFSet
... RF
max
+
OFFSet
Parameters:
<Center>
float
Range:
300kHz to RFmax (RFmax depending on model)
Increment: 0.01Hz
*RST:
300MHz
Default unit: Hz
Example:
FREQ:CENT 400 MHz
sets the center frequency for the frequency sweep to 400 MHz.
FREQ:SPAN 200 MHz
sets a span of 200 MHz. This sets the sweep range to 300 MHz
to 500 MHz.
Usage:
SCPI confirmed
[:SOURce<hw>]:FREQuency[:CW|:FIXed]
<Fixed>
The command sets the frequency of the RF output signal for CW mode
(
SOURce:FREQuency:MODE CW
). In Sweep mode (
SOURce:FREQuency:MODE
SWEep
), this value is linked to the current sweep frequency.
In addition to a numerical value, it is also possible to specify
UP
and
DOWN
. The frequency
is then increased or decreased by the value which is set under
[
SOURce<[1]|2>:]FREQuency:STEP
.
As with the "FREQ" value entered in the display, the
OFFSet
value is also taken into
consideration with this command. The specified value range is therefore only effective if
OFFSet
is set to 0. The value range for other
OFFset
values can be calculated using
the following formula:
300 kHz +
OFFSet
... RF
max
+
OFFSet
Correlation
:
FREQ
for
FREQ:MODE SWE
is linked to sweep frequency.
SOURce Subsystem
