Rohde & Schwarz SMB 100a - Page 238

Command Description R&S SMB
1407.0806.32 6.46 E-2
[SOURce:]LFOutput:SWEep[:FREQuency]:MODE AUTO | MANual | STEP
The command sets the cycle mode of the LF sweep.
The assignment of the IEC/IEEE-bus commands to the sweep modes is given in the description of
the sweep menus.
Parameters: AUTO
Each trigger triggers exactly one complete sweep.
MANual
The trigger system is not active. Each frequency step of the sweep is triggered
individually, either by varying the Current Frequency value using the rotary
knob under manual control or by means of a :LFOutput:FREQ:MAN
command under remote control. With manual control, the frequency increases
or decreases (depending on the direction of the rotary encoder) by the value
specified under SOUR:LFO:SWE:FREQ:STEP:LIN (linear spacing) or
...:STEP:LOG (logarithmic spacing). With remote control, the frequency
increases by the value specified under LFO:SWE:FREQ:STEP:LIN|LOG
which each sent :LFO:FREQ:MAN command, irrespective the value entered
there.
STEP
Each trigger triggers one sweep step only. The frequency increases by the
value entered under [SOURce:]LFOutput:SWEep:STEP.
Example:
LFO:SWE:MODE AUTO
'selects auto mode.
*RST value Resolution Options SCPI
AUTO - - Device-specific
[SOURce:]LFOutput:SWEep[:FREQuency]:POINts <numeric_value>
The command sets the number of steps in an LF sweep. The command is linked to the command
:LFOutput:SWEep[:FREQuency]:STEP as follows:
The following applies for linear sweeps and STARt < STOP: POINts = ((STOP-STARt) /
STEP:LIN) + 1
The following applies for logarithmic sweeps and STARt < STOP:
POINts = ((log STOP - log STARt) / log STEP:LOG) + 1
If POINTs changes, the value of STEP is adjusted. The STARt and STOP value is retained.
Two separate POINts values are used for linear or logarithmic sweep spacing
(LFOutput:SWEep[:FREQuency]:SPACing LIN | LOG). The command is always effective for
the currently set sweep spacing.
Example:
LFO:FREQ:STAR 'sets the start frequency to 2 kHz.
LFO:FREQ:STOP 'sets the stop frequency to 20 kHz.
LFO:SWE:SPAC LIN 'sets linear sweep spacing.
LFO:SWE:POIN 11
'sets 11 sweep steps for linear sweep spacing. The sweep step width (STEP)
is automatically set to 2 kHz.
*RST value Resolution Options Correlation SCPI
100 1 - The value of
:LFO:SWE:STEP is adjusted
automatically.
Device-specific
(adapted to instrument
properties)