Freedom R8100 SERIES, Руководство оператора

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programmed with any NAC but the radio requires the R8100 to transmit the specific NAC programmed
into the radio.
2.2.7.3.1.3 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 P25 signal and overlays the modulation
response during two symbol periods over the four “target” crossing points for an ideal P25 signal – see
Figure 2.2.7.3.1.3-1. 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. Be sure that the Monitor Modulation Type in the PROJECT 25 test zone is set for the expected
receive signal in order to establish the appropriate symbol timing used to position the diagram on the
horizontal
axis.
Figure 2.2.7.3.1.3-1 P25 Eye Diagram selection in Display Zone