Re: iGATE Functioning?
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Probably the most important part of this is to learn the various parts of an AX.25 packet.
There's basically the source, destination, path, and payload sections of a packet. Once you can find those parts, then you can start to decode all the information in the payload based on the APRS specifications.
Source : KD4APP-5
Destination : APWW11
Path : TCPIP*,qAC,T2KA
Payload : <IGATE,MSG_CNT=10,LOC_CNT=0,DIR_CNT=0,RF_CNT=0,DX=7*N4NE-2(45mi@196<0xb0>)
So, it's easy to see that the packet came from your station, aimed at APWW11, and it travelled via TCPIP*,qAC,T2KA
Perhaps Lynn can offer more information about the payload.
I'm not sure what the msg_cnt is counting... can't find a reference to it in the wiki.
If you send yourself a ?IGATE you'll see the count of local, direct, and total unique stations received "recently" (30 minutes) on an RF port. I just did that, and here's what your station told me.
14:17:51< IGate[1/2] MSG_CNT=20 LOC_CNT=3 RF_CNT=3
< IGate[2/2] TT4-NEW[KISS] Bi-Directional DX=10*N4NE-2(45mi@196°)
If you send a ?APRSL you'll see the stations that APRSISCE/32 considers "recently" "local" for the purposes of gating messages from the -IS to RF if addressed to one of those.
14:18:07< Locals:AB4CZ-1(1) KD4UYP-10(1) W4DKZ-9(1)
?APRSD shows a list of the direct (no hops used) stations.
14:18:22< Nothing Heard Direct
?APRSH * shows the list of all stations along with their used hop counts in ().
14:18:37> ?aprsh *
14:18:37< Heard:AB4CZ-1(1) KD4UYP-10(1) W4DKZ-9(1)
RF Ports now track the most distant, directly heard (no path components used), position beacon per clock hour and report it as DX in <IGATE updates as well as in ?IGATE and ?APRSS query responses. You'll also see the DX along with timestamp for the past 8 hours per port if you double-click the "APRS OK" pane.
In all cases, the format of the information is DX=n*station(Dmi@B° (e.g. "DX=1*WX4MLB-3(8mi@2°)") where n=# of direct packets, Dmi=distance in miles, B°=bearing from receiver (aprs.fi's raw packets doesn't show the ° properly).
I also haven't been able to figure out where one might be able to enable/disable this i-gate activity report yet either.
On Wed, Aug 19, 2020 at 12:49 PM Don Woodward <dbwoodw@...> wrote: