R&S FSQ Signal Analyzer - Rohde & Schwarz

R&S FSQ Instrument Functions
THRESHOLD The THRESHOLD softkey defines the threshold line.
SEARCH LIMIT
OFF
Analyzer Mode
The threshold line represents a limit for the level range of the max. search at the
lower end and that of the min. search at the upper end.
Remote command: CALC:THR -20dBm
CALC:THR ON
The SEARCH LIMIT OFF softkey disables all limits of the search range.
Remote command: CALC:MARK:X:SLIM OFF
CALC:THR OFF
MKR->TRACE The function of this softkey is identical to that of the MKR->TRACE softkey in the
MKR menu (see “MKR->TRACE” on page 4.59).
MKR->CF
STEPSIZE
The MKR->CF STEPSIZE softkey sets the step size for the center frequency variation
to the current marker frequency, and also sets step size adaptation to MANUAL.
CF STEPSIZE remains at this value until the center frequency entry mode in the
STEP menu is switched from MANUAL to AUTO again.
The MKR->CF STEPSIZE function is, above all, useful in the measurement of harmonics
with large dynamic range (narrow bandwidth and narrow span).
The softkey is not available in the time domain (span = 0 Hz).
Remote command: CALC:MARK:FUNC:CST
Example
The harmonics levels of a CW carrier are to be measured at 100 MHz.
[PRESET] R&S FSQ is set to the default setting.
[CENTER: 100 MHz] R&S FSQ sets the center frequency to 100 MHz. The span
is set to 200 MHz.
[SPAN: 1 MHz] The span is set to 100 MHz.
[MKR->] MARKER 1 is switched on and set to the maximum value
of the signal.
[NEXT] R&S FSQ switches to the submenu.
[MKR->CF STEPSIZE] The step size of the center frequency setting equals the
marker frequency (100 MHz).
[CENTER] The center frequency entry mode is activated.
[Right key] The center frequency is set to 200 MHz. The first harmonic
of the test signal is displayed.
[MKR->: PEAK] The marker is set to the harmonic and the level of the latter
is output in the marker info field.
MIN The MIN softkey sets the active marker/delta marker to the minimum of the selected
trace.
Remote command: CALC:MARK:MIN
CALC:DELT:MIN
Operating Manual 1313.9681.12 - 01 4.75