Hey,
You can use the external card, just shield it as well as possible by placeing
it into a metal grounded case and using double or triple shieldee coaxial
condutors to link it to the radio. This wil prevent any interference from
dispurbing the useful signals. This having said, please take into consideration
that if the TX antenna is at least several meters away then you should check
the feeder, connectors and antenna reflected wave, since this diturbance should
not normlly happen in good configuration. I have also noticed that for some
reason, the internal decoder takes a wihile to react to the carier CTSS signal.
It may be a design glitch or it may be possible that a optional delay might
exist via software. I never checked. For these reasons, I think the external
card is best.
Regards,
Buie Daniel Razvan
RADIOCOM Bihor
004 741 133740
buie.raz...@radiotelecomunicatii.ro
www.radiotelecomunicatii.ro
--- On Fri, 7/10/09, kerinvale <kerin...@pacific.net.au> wrote:
From: kerinvale <kerin...@pacific.net.au>
Subject: [Repeater-Builder] Maxon sm4450sc
To: Repeater-Builder@yahoogroups.com
Date: Friday, July 10, 2009, 4:35 AM
Hi guys .I have a maxon sm4450sc that is setup for rx ctcss decode in a
repeater and it is decoding ctcss ok but it only activates the call led when
the signal is over the squelch level. I am wondering is there a way that the
radio decoder can be on all the time so even if the signal is below the
squelch the radio will activate the call led without affecting the audio
squelch level.
I tried to use ctcss external decoder card and they work great with direct
connection to the receiver audio out from the detector but as I have found out
recently with the cards outside the radio they are affected badly with rf when
the transmitter is activated if the leads are too long so I have setup the
radio to decode the ctcss and this is working well but it is slow to activate
the repeater.I am trying to set the receiver up that it will decode as soon as
the signal is present instead of it needing it to be over the squelch level
before decoding.
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela. 4715
Phone 0749922574 or 0409159932
www.kerinvalecomaud io.com.au
