APRS Digipeatersoftware DIGI_NED
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DX broadcasts and queries.

DIGI_NED has a DX function build in.

First of all you can get distance information through queries. This works with the command ?DX. It works like ?MH - with port number or call.

The following commands are available:

Command Comment
?dx shows help for the dx command
?dx 1 shows best dx on port 1, all history, last 24h and last hour
?dx pe1dnn shows distance and bearing to pe1dnn

DX with port number 1 returns for example the next 3 messages:

DX-P1 of all 263.3 km D0BRP DO4BH-1
DX-P1 of 24h 161,4 km DO4BH-1 PD0JBR-1
DX P1 of 1h 123.9 km PA3ESK-2 PE1ABT-15

The first is the best DX for all entries available in the MHEARD list. It shows the distance to best DX station, the call of the best DX station and second-best DX station.

The second and third lines are almost the same, but the second is for the stations received in the last 24 hours and the last for stations received in the last hour.

If there is no second best DX station then only one call is shown.

The duration over which is the DX measured (all, 24h, 1h) is specified by the digi owner using 'dx_times' in the ini-file

We can zoom in on a station with "DX " for example

DX PD0JBR-1

This returns:

PD0JBR-1 138.1 km bearing 026 degrees

It shows distances and bearing from the digipeater to this station. The DX not only works on calls returned by DX command but on all calls in the mheard list. Like MH also port 0 is accepted to mean 'any port'. If there is no distance and bearing information the returned message will say so.

When a station is received which is the 'best DX' over a period of time then is will be announced by means of a DX bulletin which can be caught by a TH-D7 or TM-D700 radio for example.

After a DX announcement has been send a new announcement it will not be send if the same station is heard again within a period of time.

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