Northern Airborne Technology NPX138 - Manual (Page 50)

NPX138 Panel Mount Radio Manual SM41 Rev. 4.00
3.10.2
Scan Operation
Activate scanning by moving the SCAN/NORM/GUARD TX toggle switch to the SCAN
position. The ‘home’ channel is the channel that the radio was on before scanning was
activated.
The radio scans the home channel and all channels on the ‘scan list’ at a maximum rate
of 30 channels/second.
When the radio is actively scanning, a SCANNING message will appear on the upper
row of the display. When the radio has found and locked onto an active channel, the
display will show the correct channel data corresponding to the display mode selected
(ID, RX or TX).
If the operator keys the transceiver while the radio is actively scanning, the radio will be
re-channeled to the ‘home’ channel for transmission. If the radio is locked onto a
channel, transmission will occur on that channel.
From the SCAN status line, the operator may select one of several pre-defined modes
that control how the radio will carry out the scanning function. They are described in the
following section.
3.10.3
Scan Modes
You can designate any NPX channel as a PRIORITY channel and/or a LIST channel.
The appropriate scan flags will appear after the channel name on the ID line (p1 and/or
sc). Any or all of the channels can be in the scan list for LIST SCANNING, but only one
channel can have the Priority designation.
Use the status edit mode to select both the priority channel and the SCAN MODE. Use
the channel edit mode to tag channels for list scanning. The three scan modes are as
follows:
Page 3-16 Nov 10, 2003
ENG-FORM: 806-0105.DOT
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