User manual

Presetting a particular mode can be interesting to shorten that detection time, providing

that you know in advance what kind of digital format will be received.

If you manually selected a specific digital format to be decoded, its name will be

displayed, as follows (example for Digital CR mode):

Notes regarding the DMR mode:

When using a non-AOR receiver, it might be necessary to change the IF direction from

+ to – as follows:

 From the standby screen (dot flashing at the lower right display corner), LONG

press the ESC button twice.

 The display will show: DMR IF

 Use the UP or DOWN arrow to change + to – and validate with ENTER.

DMR Tier 2 is a two-slot TDMA system containing 2 channels. You can switch between

SLOT 1 and SLOT 2 by pushing the ESC button. When the transmission contains only

one voice channel, ARD300 switches to the correct slot automatically. In the case

where both channels contain only data (no voice), ARD300 remains silent although the

screen shows BSY (BUSY).

Notes regarding the NXDN mode:

 Starting with firmware 409C, the RAN (Radio Access Number) can be set

between 0 and 63. Default is 0, that allows you to hear all operators on that

received frequency. If you want to narrow down to a particular operator/Radio

Access Number, you can set the RAN as follows:

 LONG press both the UP and DOWN keys. The display will show RAN:00

 To edit the selected digit, push ENTER to change

. Change the value

with the UP or DOWN key and validate with ENTER.

 To edit the other digit, move the

to the next digit with the UP or DOWN

button, and repeat the previous operation.

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