R&S SMJ100A, Руководство по эксплуатации, Страница: 793 / 874

Remote Control Commands
R&S
®
SMJ100A
777 Operating Manual 1403.7458.32 ─ 14
Parameters:
<Source> INTernal | EXTernal | ELOop
INTernal
The internal reference oscillator is used.
EXTernal
An external reference signal is used. It must be input at the REF
IN connector at the rear of the instrument.
The instrument is informed of the frequency of the external refer-
ence signal by means of the command
[:SOURce]:
ROSCillator:EXTernal:FREQuency
.
*RST: ---
Example: ROSC:SOUR EXT
selects the external source.
ROSC:EXT:FREQ 5 MHz
informs the instrument that the external reference has a fre-
quency of 5 MHz.
Manual operation: See "Source" on page 211
7.16.18 SOURce:SWEep Subsystem
The
SOURce:
subsystem contains the commands for configuring RF sweep signals.
●
The keyword
[:FREQuency]
can be ommitted, then the commands are SCPI-
compliant.
●
To activate a RF sweep mode, use the following commands:
–
RF frequency sweep:
SOURce:FREQuency:MODE SWEep
(
SOURce:FREQuency:MODE CW
(off))
– RF level sweep:
SOURce:POWer:MODE SWEep
(
SOURce:POWer:MODE CW
(off))
●
All sweeps, including the LF sweep, can be set independently from each other.
This example shows how to set up a frequency sweep.
1. Set the sweep range.
[SOURce:]FREQuency:CENTer 200 MHz
[SOURce:]FREQuency:SPAN 300 MHz
2. Select linear or logarithmic spacing.
[SOURce:]SWEep[:FREQuency]:SPACing LIN
3. Set the step width and dwell time.
[SOURce:]SWEep[:FREQuency]:STEP:LINear 20 MHz
[SOURce:]SWEep[:FREQuency]:DWELl 12 ms
4. Select the trigger mode.
TRIGger:]FSWeep:SOURce SINGle
SOURce Subsystem