Rohde & Schwarz SME02 - Sweep; Setting the Sweep Range (START, STOP, CENTER and SPAN)

Sweep SME
1038.6002.02 2.134 E-13
2.8 Sweep
The SME offers a digital step-by-step sweep for parameters:
• RF frequency
• LF frequency
• RF level
In addition to the digital step-by-step sweep, an analog sweep for RF frequency and RF level is possible
by switching on frequency or amplitude modulation with an internal saw tooth.
Setting a sweep is effected in five basic steps which are shown in the following example, the setting of a
frequency sweep:
1. Set sweep range (START and STOP or CENTER and SPAN).
2. Select linear or logarithmic sequence (SPACING).
3. Set step width (STEP) and dwell time (DWELL).
4. Activate marker if desired (MARKER).
5. Switch on sweep (MODE set to AUTO, SINGLE or STEP).
2.8.1 Setting the Sweep Range (START, STOP, CENTER and SPAN)
The sweep range of the RF sweep can be entered in two different ways. Either by entering the START
and STOP value or by entering CENTER and SPAN. Please observe that the two parameter sets
influence one another. The influence is exerted in the following way:
• START frequency altered: STOP = unaltered
CENTER = (START + STOP)/2
SPAN = (STOP - START)
• STOP frequency altered: START = unaltered
CENTER = (START + STOP)/2
SPAN = (STOP - START)
• CENTER frequency altered SPAN = unaltered
START = (CENTER - SPAN/2)
STOP = (CENTER + SPAN/2)
• SPAN frequency altered: CENTER= unaltered
START = (CENTER - SPAN/2)
STOP = (CENTER + SPAN/2)