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R&S FSG
Instrument Functions
Analyzer Mode
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 4.44.
TRACE MATH
See following section “Mathematical Functions for Traces” on page 4.48.
MIN HOLD
The MIN HOLD softkey activates the min peak detector. R&S FSG 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:
HOLD CONT
(ON OFF)
DISP:WIND:TRAC:MODE MINH
The HOLD CONT ON/OFFsoftkey defines whether the traces in min hold and max
hold mode are reset after some specific parameter changes.
•
OFF: The traces are reset after some definite parameter changes (default)
•
ON: This mechanism is switched off.
In general, parameter changes require a restart of the measurement before results
are evaluated (e.g. with markers). For those changes that are known to require a
new measurement (e.g. modification of the span), the trace is automatically reset so
that erroneous evaluations of previous results are avoided.
This mechanism can be switched off for those exceptional cases where the
described behavior is unwelcome.
Remote command:
AVG MODE
:DISP:WIND:TRAC:MODE:HCON ON|OFF
The AVG MODE softkey selects logarithmic or linear averaging for the logarithmic
level display mode.
At the same time the difference calculation is switched between linear and logarithmic in submenu TRACE MATH.
Remote command:
CALC:MATH:MODE LIN|LOG|POW
With logarithmic averaging, the dB values of the display voltage are averaged or
substracted from each other with trace mathematical functions. With linear averaging the level values in dB are converted into linear voltages or powers prior to averaging. Voltage or power values are averaged or offset against each other and
reconverted into level values.
For stationary signals the two methods yield the same result.
Operating Manual 1309.0090.12 - 05
4.41