Re: [tracker2] tracker2 working but not igate
- I don't know if I'd consider it a shortcut - for most data modes it
would make sense to transmit flat. Pre-emphasis is just for voice noise
reduction. It's just that the 'standard' is to use pre-emphasis for
APRS since we're using so many voice radios.
On 1/2/2012 4:42 PM, Matthew Cook wrote:
> Hmm... Thanks for that Scott...
> That might explain a few things why my TH-D72 is not being heard by some
> of my local digi's reliably, I know the TNC's they are using do not like
> demodulating flat audio tones (MFJ1270b's).
> Very naughty of Mr Kenwood to take a short cut... I bet they are
> injecting both the 1200/9600 tones into the same point in the audio
> path... tisk tisk tisk.
> On Tue, Jan 3, 2012 at 5:15 AM, Scott Miller <scott@...
> <mailto:scott@...>> wrote:
> In my experience, this is very often a problem with pre-emphasis. I'm
> not sure about the VX8, but I know that the Kenwoods transmit flat - the
> 1200 and 2200 hz tones are of equal deviation. Most other radios
> (unless you're using the 9600 baud data port) apply 6 dB/octave of
> pre-emphasis, so the 2200 hz tone is louder. The reverse is done on the
> receive side, and some demodulators don't deal with the twist very well.
> I've noticed this with one of the local digis here. It picks up my
> IGate (now running a T3) fine if I use the mic input, and not well at
> all if I use the data jack.
> On 1/1/2012 10:12 PM, Robert Lane wrote:
> > This question is not totally related to the Tracker2 but it is a
> > of the puzzle. I recently bought a VX8GR (KB8ZXE-7) and have been
> > testing it out. I made a trip to the Ironwood Michigan area to visit
> > family and brought the VX8 along. For some reason the iGate in
> > (AB8ZJ) won't pick my VX8 up directly. It will however gate
> traffic from
> > my radio to the internet if and only if it goes through another digi
> > first. There is a digi in Wakefield a few miles away (KB8ZXE-1)
> and the
> > Ironwood iGate will pass traffic all day long to the internet from my
> > VX8 as long as it goes through the Wakefield digi first. The
> > digi is an OpenTrcker2 running as a fill-in digi.
> > In fact I was at my buddies apartment in Ironwood on his roof
> looking at
> > an antenna install. I manually sent several position packets and the
> > only one that got gated to the internet went through (WALES) Wales MN
> > some 90 miles away and then back to the Ironwood iGate.
> > So from the sounds of it my VX8GR is working fine. AB8ZJ appears
> to be
> > working fine for other mobiles and fixed stations. I was picking
> up the
> > other stations digipeated packets from AB8ZJ as well. What is keeping
> > AB8ZJ from dumping my packets to the internet. I believe he is
> > UIview32 as a digi and an Igate. I should have tried changing the
> > on my HT but I was running WIDE1-1 (only). This really cut down
> on the
> > APRS coverage for me in a big way and I would like to come up with a
> > solution
> > This might be a lot to swallow but please read it over and
> message me if
> > you have any ideas. I leave town tomorrow so I probably won't
> have time
> > to test anything.
> > Thanks
> > Bob
> > KB8ZXE
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