Operating Manual R&S SMIQ - Volume 1 - Rohde & Schwarz

SOURce:SWEep SubsystemSMIQ[:SOURce]:SWEep[:FREQuency]:POINts NumberThe command determines the number of steps in a sweep.Instead of this command, commands SOURce:SWEep:FREQuency:STEP:LINear andSOURce:SWEep:FREQuency:STEP:LOGarithmic should be used, as SOURce:SWEep:FREQuency:POINts has been adapted to the instrument characteristics in comparison to theSCPI 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 + 1The 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., beforePOINts is changed, SPACing must be set correctly. A change of POINts results in an adaptationof STEP, but not of STARt, STOP and SPAN.Example: :SOUR:SWE:POIN 100[:SOURce]:SWEep[:FREQuency]:SPACing LINear | LOGarithmicThe command selects whether the steps have linear or logarithmic spacings.Example: :SOUR:SWE:SPAC LIN *RST value is LIN[:SOURce]:SWEep[:FREQuency]:STEPThe commands to set the step width for linear and logarithmic sweeps. The settings for STEP:LINand STEP:LOG are independent.[:SOURce]:SWEep[:FREQuency]:STEP[:LINear] 0 to 1 GHzThe command sets the step width with the linear sweep. If STEP[:LINear] is changed, the valueof 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 beomitted, 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 PCTThe command indicates the step width factor for logarithmic sweeps. The next frequency value ofa sweep is calculated according tonew 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 nextsweep step. Usually STEP:LOG is indicated in percent, with the suffix PCT having to be usedexplicitly. If STEP:LOG is changed, the value of POINts valid for SPAC:LOG also changesaccording to the formula stated under POINts. A change of STARt or STOP does not result in achange of STEP:LOG.Example: :SOUR:SWE:STEP:LOG 10PCT *RST value is 1 PCT[:SOURce]:SWEep:POWer:DWELl 10 ms to 5 sThe command sets the dwell time per level step.Example: :SOUR:SWE:POW:DWEL 12ms *RST value is 15 ms1125.5555.03 3.150E-9