SOURce:SWEep SME
1038.6002.02 3.104 E-13
[:SOURce]:SWEep[:FREQuency]:MODE AUTO | MANual | STEP
The command specifies the run of the sweep.
AUTOEach trigger triggers exactly one entire sweep cycle.
MANual Each frequency step of the sweep is triggered by means of manual control or a
SOURce:FREQuency:MANual command, the trigger system is not active. The
frequency increases or decreases (depending on the direction of the shaft encoder)
by the value indicated under [:SOURce]:FREQuency:STEP:INCRement.
STEP Each trigger triggers only one sweep step (single-step mode). The frequency
increases by the value indicated under [:SOURce]:SWEep:STEP:LOGarithmic.
Example: :SOUR:SWE:MODE AUTO *RST value is AUTO
[:SOURce]:SWEep[:FREQuency]:POINts Number
The command determines the number of steps in a sweep.
Instead of this command, commands SOURce:SWEep:FREQuency:STEP:LINear and
SOURce:SWEep:FREQuency:STEP:LOGarithmic should be used, as SOURce:SWEep
:FREQuency:POINts has been adapted to the instrument characteristics in comparison to the
SCPI command.
The value of POINts depends on SPAN and STEP according to the following formulas..
The following is true for linear sweeps : POINts = SPAN / STEP:LIN + 1
The following is true for logarithmic sweeps and STARt < STOP:
POINts = ((log STOP - log STARt) / log (1+ STEP:LOG))
Two independent POINts values are used for SPACing LOG and SPACing LIN. I.e., before
POINts is changed, SPACing must be set correctly. A change of POINts results in an adaptation
of STEP, but not of STARt, STOP and SPAN.
Example: :SOUR:SWE:POIN 100
:SOURce2:SWEep[:FREQuency]:SPACing LINear | LOGarithmic
The command selects whether the steps have linear or logarithmic spacings.
Example: :SOUR2:SWE:SPAC LIN *RST value is LINear
[:SOURce]:SWEep[:FREQuency]:STEP[:LINear] 0 to 1 GHz
The command sets the step width with the linear sweep. If STEP[:LINear] is changed, the value
of POINts valid for SPACing:LINear also changes according to the formula stated under POINts.
A change of SPAN does not result in a change of STEP[:LINear]. Keyword [:LINear] can be
omitted, then the command conforms to SCPI regulations (see example).
Example: :SOUR:SWE:STEP 1MHz *RST value is 1 MHz
[:SOURce]:SWEep[:FREQuency]:STEP:LOGarithmic 0.01 to 50 PCT
The command indicates the step width factor for logarithmic sweeps. The next frequency value of
a sweep is calculated according to
new frequency = prior frequency + STEP:LOG x prior frequency (if STARt < STOP)
STEP:LOG indicates the fraction of the prior frequency by which this is increased for the next
sweep step. Usually STEP:LOG is indicated in percent, with the suffix PCT having to be used
explicitly. If STEP:LOG is changed, the value of POINts valid for SPAC:LOG also changes
according to the formula stated under POINts. A change of STARt or STOP does not result in a
change of STEP:LOG.
Example: :SOUR:SWE:STEP:LOG 10PCT *RST value is 1 PCT
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