R&S 1129.7246.03, Operating Manual

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Operating Manual 1302.6163.12 - 03 4.103
R&S ESU Instrument Functions
Analyzer Mode
CENTER
The CENTER softkey opens the window for manually entering the center frequency.
The allowed range of values for the center frequency is:
• for the frequency domain (span >0):
minspan / 2
≤
f
center
≤
f
max
– minspan / 2
• and for the time domain (span = 0):
0 Hz
≤
f
center
≤
f
max
Remote command:
FREQ:CENT 100MHz
CF STEPSIZE The CF STEPSIZE softkey opens a submenu for setting the step size of the center
frequency. The step size can be coupled to the span (frequency domain) or the res-
olution bandwidth (time domain) or it can be manually set to a fixed value. The soft-
keys are mutually exclusive selection keys.
The softkeys are presented according to the selected domain (frequency or time).
Softkeys in frequency domain:
0.1 * SPAN The 0.1 * SPAN softkey sets the step size for the center frequency entry to 10% of
the span.
Remote command:
FREQ:CENT:STEP:LINK SPAN
FREQ:CENT:STEP:LINK:FACT 10PCT
0.5 * SPAN The 0.5 * SPAN softkey sets the step size for the center frequency entry to 50% of
the span.
Remote command:
FREQ:CENT:STEP:LINK SPAN
FREQ:CENT:STEP:LINK:FACT 50PCT
X * SPAN The X * SPAN softkey allows the factor defining the center frequency step size to be
entered as % of the span.
Remote command:
FREQ:CENT:STEP:LINK SPAN
FREQ:CENT:STEP:LINK:FACT 20PCT
= CENTER The = CENTER softkey sets the step size coupling to MANUAL and the step size to
the value of the center frequency. This function is especially useful during measure-
ments of the signal harmonic content because by entering the center frequency
each stroke of the
STEP key selects the center frequency of another harmonic.
Remote command:
--
= MARKER The = MARKER softkey sets the step size coupling to MANUAL and the step size to
the value of the marker. This function is especially useful during measurements of
the signal harmonic content at the marker position because by entering the center
frequency each stroke of the
STEP key selects the center frequency of another har-
monic.
Remote command:
--
f
center
center frequency
minspan smallest selectable span > 0 Hz (10 Hz)
f
max
max. frequency