R&S FSQ Signal Analyzer - Rohde & Schwarz

R&S FSQ Instrument Functions
EXTERNAL MIXER
(option B21)
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 ≤ fcenter ≤ fmax – minspan / 2
• and for the time domain (span = 0):
0 Hz ≤ fcenter ≤ fmax
fcenter center frequency
minspan smallest selectable span > 0 Hz (10 Hz)
max. frequency
fmax
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 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:
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 measurements
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: --
4.10 Operating Manual 1313.9681.12 - 01