Rohde & Schwarz SMC100A - Page 307

Remote Control Commands
R&S
®
SMC100A
292Operating Manual 1411.4060.32 ─ 09
f
CENTer
= (f
STOP
+ f
STARt
)/2
Note: You can select any frequency within the setting range. The range is defined with
the parameters [:SOURce<hw>]:FREQuency:STARt and [:SOURce<hw>]:
FREQuency:STOP.
A defined offset and the multiplier factor affect the sweep frequency range and there-
fore all correlated parameters. The set frequencies are only absolute values, if the off-
set = 0 and the multiplication factor = 1. The multiplier multiplies the frequencies
accordingly, and the offset ≠ 0 shifts the frequencies corresponding to the set value.
300 kHz * f
MULTiplier
+ f
OFFSet
... f
max
* f
MULTiplier
+ f
OFFSet
Parameters:
<Center> float
Range: full frequency range
Increment: see the data sheet: RF characteristics > Resolution
of setting
*RST: depends on model
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.
Manual operation: See " Center Freq - Frequency Sweep " on page 161
[:SOURce<hw>]:FREQuency[:CW|FIXed] <Fixed>
Sets the frequency of the RF output signal.
In CW mode, see FREQ:MODE CW|FIXed, the instrument operates at a fixed fre-
quency.
In sweep mode FREQ:MODE SWE, the value applies to the sweep frequency and the
instrument processes the frequency settings in defined sweep steps.
You can enter either a numerical frequency value, of decrease or increase the current
frequency step by step with FREQ UP and FREQ DOWN. The frequency is then
increased or decreased by the value [:SOURce<hw>]:FREQuency:STEP[:
INCRement] in FREQ:STEP:MODE USER.
Note:
A defined offset and the multiplier factor affect the sweep range and therefore all corre-
lated parameters. The set frequencies are only absolute values, if the offset = 0 and
the multiplication factor = 1. The multiplier multiplies the frequencies accordingly, and
the offset ≠ 0 shifts the frequencies corresponding to the set value.
The actual frequency at the RF output does not change, but rather the value queried
with [:SOUR]:FREQ?, according to the formula:
f
FREQ
= f
RFout
* f
MULTiplier
+ f
OFFSet
Correlation: FREQ for FREQ:MODE SWE is linked to the sweep frequency.
SOURce Subsystem