Rohde & Schwarz EMI Test ReceiverESCI - Page 202

Frequency and Span - Analyzer R&S ESCI
1166.6004.12 4.70 E-1
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
f
center
center frequency
minspan smallest selectable span > 0 Hz (10 Hz)
f
max
max. frequency
IEC/IEEE-bus 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 resolution bandwidth (time domain) or it can be manually set
to a fixed value. The softkeys are mutually exclusive selection keys.
The softkeys are presented according to the selected domain (frequency or
time).
Softkeys in frequency domain:
AUTO
0.1 * SPAN
The 0.1 * SPAN softkey sets the step size for the center
frequency entry to 10% of the span.
IEC/IEEE-bus command: FREQ:CENT:STEP:LINK
SPAN
FREQ:CENT:STEP:LINK:FACT 10PCT
AUTO
0.5 * SPAN
The 0.5 * SPAN softkey sets the step size for the center
frequency entry to 50% of the span.
IEC/IEEE-bus command: FREQ:CENT:STEP:LINK
SPAN
FREQ:CENT:STEP:LINK:FACT 50PCT
AUTO
X * SPAN
The X * SPAN softkey allows the factor defining the
center frequency step size to be entered as % of the
span.
IEC/IEEE-bus command: FREQ:CENT:STEP:LINK
SPAN
FREQ:CENT:STEP:LINK:FACT 20PCT