6 Operating modes EFA-200/-300
6-28
6.4.3 Selecting the measurement mode (detection mode)
Note: If the “Standard” measurement range was chosen, the detection
mode is preselected and cannot be set. The F2 key and display
field are deactivated.
You can choose among three detection modes:
• ACT RMS: The RMS value of each spectral line can be measured. The
measurement result is not a function of the signal’s polarization.
• AVG RMS: The spectrum is averaged over a number NAVG of
successive spectra. This is a way of reducing noise, displaying lower
measured values and choosing an averaging time. The progress is
displayed using the validity indicator.
Averaging of the resulting spectrum: see page C-2
Setting the averaging parameter NAVG: see page 8-7
• VECT PEAK: The peak value of individual spectral lines can be
measured.
Depending on the signal’s polarization, this measured value lies
between ACT RMS and a value 3 dB higher.
✓ The device should be in the “RUN” state.
⇒ To switch between detection modes, press the F2 key.
The selected detection mode appears in display field F2.
6.4.4 Selecting the display mode
You have a choice of two display modes:
• LIVE: The resulting spectrum is displayed.
• MAX: For each spectral line, the maximum value is determined and
displayed on the screen.
✓ The device should be in the “RUN” state.
⇒ To switch between display modes, press the F3 key.
The selected display mode appears in display field F3.
The display value “MAX” is cleared when switching to LIVE.
Note: When switching from MAX to LIVE, averaging is restarted if AVG
RMS was chosen as the detection mode.
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