Freedom R8100 SERIES, Руководство оператора

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2.2.7.8.1.3 Display Zone
Select Display (Display Zone submenu)
See 2.2.4 Display Zone for standard selections and below for custom selections.
Eye Diagram (Display Zone selection)
The Eye Diagram provides a visual display of the received dPMR signal and overlays the modulation
response during two symbol periods over the four “target” crossing points for an ideal dPMR signal – see
Figure 2.2.7.8-4 . Navigate to the Display Zone while in dPMR mode to select the Eye Diagram for
viewing with the other dPMR measurements on the main screen. The Eye Diagram can indicate whether
a transmitter has significant unbalances or offsets in the modulation circuitry by noting how tightly
grouped the waveform is around the crossing points.
Figure 2.2.7.8-4 dPMR Eye Diagram in Display Zone
Display Mode (Eye Diagram submenu in Display Zone)
Selects the display presentation with the following horizontal menu choices:
Normal – The display updates continuously.
Fade Away – Similar to the persistence mode on an oscilloscope - see Figure 2.2.7.8-5. The intensity of
each trace fades away or decays as new traces are received. The effect is to intensify the display in the
area where the waveform spends most of its time. Note: Whenever the Display Mode is changed the
R8100 reconfigures the presentation. This process takes approximately 10 seconds and is complete when
the new setting appears in the Display Mode field.