[App_rpt-users] Re Kenwood Remote TRX

Ralph A. Schmid, dk5ras ralph at radio-link.net
Wed Mar 17 11:18:22 EDT 2010


> well yes, the 1200bps output pin does exactly that, but
> the 9600 baud pin in 1200 mode is somewhere bizarrely
> in between.

In fact it should transmit a clean 1k2 signal, but with wrong (flat)
frequency response, so decoding it with the normal ham receivers will not be
100% OK...

Ralph.

> ----------------------------------------
> > From: ralph at radio-link.net
> > To: app_rpt-users at qrvc.com
> > Date: Wed, 17 Mar 2010 16:13:36 +0100
> > Subject: Re: [App_rpt-users] Re Kenwood Remote TRX
> >
> >> Well, sorry but *WRONG!!!*. 1200 packet mode rolls off the
> >> low side of the audio spectrum and makes CTCSS decoding completely
> >> impossible.
> >
> > This should be normal behaviour, as 1k2 packet is AFSK/FFSK and
> relies on
> > normal audio path, with pre/deemphasis and 300-3000 Hz AF
> filtering for best
> > performance.
> >
> > Ralph.
> >
> >> JIM
> >>
> >>
> >> ----------------------------------------
> >>> From: jann at gmx.de
> >>> To: telesistant at hotmail.com; app_rpt-users at qrvc.com
> >>> Subject: Re [App_rpt-users] Kenwood Remote TRX
> >>> Date: Wed, 17 Mar 2010 15:06:05 +0100
> >>>
> >>> Hello Jim,
> >>>
> >>>> Yep 9600 baud packet mode is
> >>>> perfict. You will need to feed the URI output through the 2X
> >>>> amplifier since the Kenwood takes boat-loads of audio to
> >>>> modulate it properly.
> >>>
> >>> I checked the TM-D700 manual:
> >>> "Output of detected 9600 bps data (500 mVP-P, 10 kOhm) -> Also
> >> functions as
> >>> a common pin for 1200 bps and 9600 bps data output."
> >>>
> >>> RX seems the same as for 9600 baud packet mode. For TX i tried
> >> 1200 bps with
> >>> a low setting of "txvoice" (radio tune txvoice 100). Seems to
> >> be another way
> >>> without using the amplifier + txboost=1. Or am I wrong?
> >>>
> >>>> Set carrier detect and rxctcss to dsp
> >>>> and txmixa to voice. The radio makes its own CTCSS on transmit.
> >>>
> >>> Yep, it works fine with iaxRpt for Windows. How can I change
> the inital
> >>> frequency 146.580 MHz to another one? It is not a frequency for
> >> hamradio in
> >>> germany. I found 146.580 MHz in app_rpt.c, but I hope there is
> >> another way
> >>> to change it ;)
> >>>
> >>> Thanks!
> >>> 73,
> >>> Jann
> >>>
> >>
> >> _______________________________________________
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> >> App_rpt-users at qrvc.com
> >> http://qrvc.com/mailman/listinfo/app_rpt-users
> >>
> >
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