R&S SMJ100A, Руководство по эксплуатации, Страница: 729 / 874

Remote Control Commands
R&S
®
SMJ100A
713 Operating Manual 1403.7458.32 ─ 14
[:SOURce<hw>]:FREQuency:STOP
.................................................................................719
[:SOURce<hw>]:FREQuency:STEP[:INCRement]
............................................................. 719
[:SOURce<hw>]:FREQuency:STEP:MODE
...................................................................... 720
[:SOURce<hw>]:FREQuency:CENTer <Center>
Sets the center frequency of the RF sweep range.
The range is defined by this center frequency and the specified
[:SOURce<hw>]:
FREQuency:SPAN
, according to the formula:
f
CENTer
- (f
SPAN
/2) ... f
CENTer
+ (f
SPAN
/2)
with:
f
SPAN
= f
STOP
- f
STARt
The center frequency directly relates to the span, and the start and stop frequencies. If
you change one of these parameters, the center frequency changes accordingly.
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 266
SOURce Subsystem