Re: TinyTrak4 TEXT Mode Incoming Messages
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Mike,
If you are using a handheld radio with your TT4, it probably does not switch back to receive fast enough after a transmission for you to hear its own digipeated traffic. Portables are designed to transmit for a few ms after you let off the PTT switch ( i.e., stop holding down the PTT switch) so that the squelch circuits in everyone's radios are not continually making horrid noises. Good for voice, not so good for data.?
Some digipeaters after hearing your packet might have enough delay for your radio to "catch up" before forwarding your original packet. It is much more likely that your TT4 will catch the second "hop" of your packet, from the second digipeater in line, which will contain your original packet plus APRS formatting stuff.
73,
Allen AF6OF
-----Original Message-----
From: Michael Sutton <mikesutton@...>
To: [email protected] Group Moderators < [email protected]>
Sent: Sat, May 23, 2020 3:38 pm
Subject: Re: [TinyTrak] TinyTrak4 TEXT Mode Incoming Messages
I made a bit of progress. I drove closer to a digipeater and was able to see some packets.
When I send a message, I hear what sounds like an acknowledge message (I must admit, I don't know APRS protocol very well and not sure when/if I get an ACK).? Should I be able to see that ACK message (assuming that is what it is) on the TinyTrak output?
Thanks for the quick replies!
Mike
AC0LX
On Sat, May 23, 2020 at 4:05 PM Allen Lord < allen@...> wrote:
Depending upon how you have audio feeding the TT4, you will need to make a few adjustments. The yellow?CD light is more or less a carrier?detect indicator, and not an indicator that the TT4 is actually decoding packets. If you are feeding the TT4 audio from the audio out jack of a handheld, its coming out at around speaker level, and you should turn your volume down very low, perhaps?as low as your radio can be heard before you?override the built in speaker by plugging?in the connection cable You should set the CDMODE to TONES, and try the default value for RXAMP?( 12 as I recall) if you don't see any decoded signals, set RXAMP?down to 5 and work up from there.
If you are getting the audio from a 6 pin mini DIN accessory?jack, it will be coming out at line lever, nominally 1 Volt, P/P. The default RXAMP?setting should work, but remember to set CDMODE to TONES.
Audio?designed?to run a speaker mic is very high level audio, and the louder you have the volume control up, the more distortion will be present, so joggle your volume and RX values and you will see data, assuming that there is anything strong enough to decode. Just because you can hear traffic, it does not mean that the signal/noise level is sufficient to decode it.?
73,
Allen AF6OF
Assuming you have set the RXAMP properly and your TT4 is decoding packets, the settings you should be looking at are:
PKTICOM [ true | false ]??? ????Sets if received packets should be sent to the computer TEXT, DEAFTEXT, and KISS ports.
PKTOCOM [ true | false ]????? Sets if generated packets should be sent to the computer TEXT, DEAFTEXT, and KISS ports.
On Saturday, May 23, 2020, 5:22:17 PM EDT, Michael Sutton < mikesutton@...> wrote:
I'm trying to send and receive from TinyTrak4 in text mode.? It looks like I'm successfully sending messages and I can see them appear on??However, I have never seen an incoming message displayed to the terminal.?The carrier detect LED flashes when a message is present, but I've yet to see any decoded text.? Any suggestions as to what I might be doing wrong??
The basic configuration is as described in the quick start:
AMODE TEXT
ABAUD 19200
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