R&S ESU Series Operating Manual page 134

R&S ESU
CENTER
The CENTER softkey opens the window for manually entering the center frequency.
The allowed range of values for the center frequency is:
•
•
f
center
minspan
f
max
Remote command:
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:
0.5 * SPAN The 0.5 * SPAN softkey sets the step size for the center frequency entry to 50% of
the span.
Remote command:
X * SPAN The X * SPAN softkey allows the factor defining the center frequency step size to be
entered as % of the span.
Remote command:
= 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:
Operating Manual 1302.6163.12 - 03
for the frequency domain (span >0):
minspan / 2 ≤ f ≤ f
center max
and for the time domain (span = 0):
0 Hz ≤ f ≤ f
center max
center frequency
smallest selectable span > 0 Hz (10 Hz)
max. frequency
– minspan / 2
FREQ:CENT 100MHz
FREQ:CENT:STEP:LINK SPAN
FREQ:CENT:STEP:LINK:FACT 10PCT
FREQ:CENT:STEP:LINK SPAN
FREQ:CENT:STEP:LINK:FACT 50PCT
FREQ:CENT:STEP:LINK SPAN
FREQ:CENT:STEP:LINK:FACT 20PCT
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Instrument Functions
Analyzer Mode
4.103