R&S FSQ Signal Analyzer - Rohde & Schwarz

R&S FSQ Instrument Functions
Analyzer Mode
VIEW The VIEW softkey freezes the current contents of the trace memory and displays it.
If a trace is frozen by VIEW, the instrument settings can be changed without the displayed
trace being modified (exception: level display range and reference level, see
below). The fact that the trace and the current instrument setting do not agree any
more is indicated by an enhancement label "*" at the right edge of the grid.
If in the VIEW display mode the level display range (RANGE) or the reference level
(REF LEVEL) are changed, R&S FSQ automatically adapts the measured data to
the changed display range. This allows an amplitude zoom to be made after the
measurement in order to show details of the trace.
Remote command: DISP:WIND:TRAC:MODE VIEW
BLANK The BLANK softkey activates the blanking of the trace on the screen.
SWEEP
COUNT
Remote command: DISP:WIND:TRAC OFF
The SWEEP COUNT softkey activates the entry of the number of sweeps used for
averaging. The allowed range of values is 0 to 30000 and the following should be
observed:
• Sweep Count = 0 means running averaging
• Sweep Count = 1 means no averaging, maxhold or minhold is carried out
• Sweep Count > 1 means averaging over the selected number of sweeps; in the
continuous sweep mode averaging is performed until the set number of sweeps
is attained and is then continued as running averaging.
The default setting is running averaging (Sweep Count = 0). The number of sweeps
used for averaging is the same for all active traces in the selected diagram.
The setting of the sweep count in the TRACE menu is equivalent to the setting in
the SWEEP menu.
Remote command: SWE:COUN 64
DETECTOR See following section “Selection of Detector” on page 4.47.
TRACE MATH See following section “Mathematical Functions for Traces” on page 4.51.
MIN HOLD The MIN HOLD softkey activates the min peak detector. R&S FSQ saves for each
sweep the smallest of the previously stored/currently measured values in the trace
memory. The detector is automatically set to MIN PEAK. In this way, the minimum
value of a signal can be determined over several sweeps.
This function is useful e.g. for making an unmodulated carrier in a composite signal
visible. Noise, interference signals or modulated signals are suppressed by the min
hold function whereas a CW signal is recognized by its constant level.
Pressing the MIN HOLD softkey again clears the trace memory and restarts the min
hold function.
Remote command: DISP:WIND:TRAC:MODE MINH
Operating Manual 1313.9681.12 - 01 4.43