Rohde & Schwarz SMB 100a - Page 272

Command Description R&S SMB
1407.0806.32 6.80 E-2
[SOURce:]SWEep[:FREQuency]:POINts <numeric_value>
The command sets the number of steps in an RF sweep. The command is linked to the command
:SWEep[:FREQuency]:STEP as follows:
The following applies for linear sweeps: POINts = (SPAN / 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
(:SWEep[:FREQuency]:SPACing LIN | LOG). The command is always effective for the
currently set sweep spacing.
Example:
FREQ:STAR 'sets the start frequency to 100 MHz.
FREQ:STOP 'sets the stop frequency to 500 MHz.
SWE:SPAC LIN 'sets linear sweep spacing.
SWE:POIN 401
'sets 401 sweep steps for linear sweep spacing. The sweep step width (STEP)
is automatically set to 1 MHz.
*RST value Resolution Options Correlation SCPI
-
The value of :SWE:STEP is adjusted
automatically.
Device-specific (adapted to
instrument properties)
[SOURce:]SWEep[:FREQuency]:SPACing LINear | LOGarithmic
The command selects linear or logarithmic sweep spacing.
The keyword [:FREQuency] can be omitted (see example). The command is then SCPI-compliant.
Example:
SWE:SPAC LIN 'selects linear sweep spacing for a frequency sweep.
*RST value Resolution Options SCPI
LIN - Device-specific
[SOURce:]SWEep[:FREQuency]:STEP[:LINear] 0 ... (STOP - STARt)
The command sets the step width for linear sweeps.
This command is linked to the command :SWEep[:FREQuency]:POINts as follows:
POINts = (SPAN / STEP:LIN) + 1
If STEP:LIN changes, the value of POINTs is adjusted. The STARt and STOP value is retained.
The keywords [:FREQuency] and [:LINear] can be omitted (see example). The command is
then SCPI-compliant.
Example:
FREQ:STAR 'sets the start frequency to 100 MHz.
FREQ:STOP 'sets the stop frequency to 500 MHz.
SWE:SPAC LIN 'sets linear sweep spacing.
SWE:STEP 2 MHz
'sets the step width for linear RF sweep spacing to 2 MHz. The number of
sweep steps for linear sweep spacing (POINts) is automatically set to 201.
*RST value Resolution Options Correlation SCPI
1 MHz 0.1 Hz.
The value of :SWE:POINts is
adjusted automatically.
Device-specific