Stamp Selcall decoder
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Posts: 46,084
what's selcall?
> To: basicstamps@yahoogroups.com
> From: jbh@x...
> Date: Thu, 08 Mar 2001 01:38:03 -0000
> Reply-to: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Stamp Selcall decoder
> Anyone successfully used the stamp to decode selcall? Want to do this
> but don't want to re-invent the wheel.
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
> To: basicstamps@yahoogroups.com
> From: jbh@x...
> Date: Thu, 08 Mar 2001 01:38:03 -0000
> Reply-to: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Stamp Selcall decoder
> Anyone successfully used the stamp to decode selcall? Want to do this
> but don't want to re-invent the wheel.
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
Comments
but don't want to re-invent the wheel.
around 1000hz area ,each of 20ms. They use it as an in band
signalling system mainly on radio systems. Its transmitted audibly at
the beginning or the end of a conversation. Used for vehicle
identification or remote controll. Many different uses and many
different formats. Usually hear it on police or emergency service
radio systems.
--- In basicstamps@y..., "Doug Simpson" <veewee77@a...> wrote:
> what's selcall?
>
>
> > To: basicstamps@y...
> > From: jbh@x...
> > Date: Thu, 08 Mar 2001 01:38:03 -0000
> > Reply-to: basicstamps@y...
> > Subject: [noparse][[/noparse]basicstamps] Stamp Selcall decoder
>
> > Anyone successfully used the stamp to decode selcall? Want to do
this
> > but don't want to re-invent the wheel.
> >
> >
> >
> >
> > Your use of Yahoo! Groups is subject to http:/
/docs.yahoo.com/info/terms/
> >
> >
> >
for conventional two-way?
Original Message
> Short for selective calling. 'Generally' its a series of 6 tones
> around 1000hz area ,each of 20ms. They use it as an in band
> signalling system mainly on radio systems. Its transmitted audibly at
> the beginning or the end of a conversation. Used for vehicle
> identification or remote controll. Many different uses and many
> different formats. Usually hear it on police or emergency service
> radio systems.
the
time with speech. Selcall is sent on trailing edge of speech. Can use
it on any radio system. Railways use it for identification of locos,
base calls, emergency alert, vigalence etc.
Sounds sort of like the tones you hear at the end audio cassette
tapes
but faster.
--- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> We're talking 800 Mhz trunked radio? Or are you refering to CTCSS
stuff used
> for conventional two-way?
>
>
Original Message
>
> > Short for selective calling. 'Generally' its a series of 6 tones
> > around 1000hz area ,each of 20ms. They use it as an in band
> > signalling system mainly on radio systems. Its transmitted
audibly
at
> > the beginning or the end of a conversation. Used for vehicle
> > identification or remote controll. Many different uses and many
> > different formats. Usually hear it on police or emergency service
> > radio systems.
jbh@x... wrote:
>
> No. Not talking about CTCSS, thats out of band signalling...on all
> the
> time with speech. Selcall is sent on trailing edge of speech. Can use
> it on any radio system. Railways use it for identification of locos,
> base calls, emergency alert, vigalence etc.
> Sounds sort of like the tones you hear at the end audio cassette
> tapes
> but faster.
>
> --- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> > We're talking 800 Mhz trunked radio? Or are you refering to CTCSS
> stuff used
> > for conventional two-way?
> >
> >
Original Message
> >
> > > Short for selective calling. 'Generally' its a series of 6 tones
> > > around 1000hz area ,each of 20ms. They use it as an in band
> > > signalling system mainly on radio systems. Its transmitted
> audibly
> at
> > > the beginning or the end of a conversation. Used for vehicle
> > > identification or remote controll. Many different uses and many
> > > different formats. Usually hear it on police or emergency service
> > > radio systems.
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
them as 2-way radios.
I don't think decoding this is gonna do much though -- the main stuff on a
trunked radio system is on a separate data-only channel.
Original Message
> It sounds like a chirp when the mike is released
> > No. Not talking about CTCSS, thats out of band signalling...on all
> > the
> > time with speech. Selcall is sent on trailing edge of speech. Can use
> > it on any radio system. Railways use it for identification of locos,
> > base calls, emergency alert, vigalence etc.
> > Sounds sort of like the tones you hear at the end audio cassette
> > tapes
> > but faster.
maintain. At the moment we use decoder units which are about $800 a
pop. What I want to do was to use the stamp to copy one of these units
function plus a lot more for a lot less money. We use selcall to poll
our repeaters to query any alarms that appear. This gives use some
indication of what could be wrong before we travel there. We can also
start generators if batteries need a boost.
Stamps can generate selcall nicely but decoding is a little more
complex.
Don't know what Nextel phones are but we only use radios on the
network.
--- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> OK, so it is like the trunked radio stuff and the Nextel phones when
you use
> them as 2-way radios.
>
> I don't think decoding this is gonna do much though -- the main
stuff on a
> trunked radio system is on a separate data-only channel.
>
>
Original Message
>
>
> > It sounds like a chirp when the mike is released
>
> > > No. Not talking about CTCSS, thats out of band signalling...on
all
> > > the
> > > time with speech. Selcall is sent on trailing edge of speech.
Can use
> > > it on any radio system. Railways use it for identification of
locos,
> > > base calls, emergency alert, vigalence etc.
> > > Sounds sort of like the tones you hear at the end audio cassette
> > > tapes
> > > but faster.
radios. As a 2-way, they have a push-to-talk buttton and you can talk to
other radios on your account. When you key / unkey them they make a series
of audible tones.
Original Message
> The situation is that we use selcall a lot on the radio system I
> maintain. At the moment we use decoder units which are about $800 a
> pop. What I want to do was to use the stamp to copy one of these units
> function plus a lot more for a lot less money. We use selcall to poll
> our repeaters to query any alarms that appear. This gives use some
> indication of what could be wrong before we travel there. We can also
> start generators if batteries need a boost.
> Stamps can generate selcall nicely but decoding is a little more
> complex.
> Don't know what Nextel phones are but we only use radios on the
> network.
jbh@x... wrote:
>
> The situation is that we use selcall a lot on the radio system I
> maintain. At the moment we use decoder units which are about $800 a
> pop. What I want to do was to use the stamp to copy one of these units
> function plus a lot more for a lot less money. We use selcall to poll
> our repeaters to query any alarms that appear. This gives use some
> indication of what could be wrong before we travel there. We can also
> start generators if batteries need a boost.
> Stamps can generate selcall nicely but decoding is a little more
> complex.
> Don't know what Nextel phones are but we only use radios on the
> network.
>
> --- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> > OK, so it is like the trunked radio stuff and the Nextel phones when
> you use
> > them as 2-way radios.
> >
>
> > I don't think decoding this is gonna do much though -- the main
> stuff on a
> > trunked radio system is on a separate data-only channel.
> >
> >
Original Message
> >
> >
> > > It sounds like a chirp when the mike is released
> >
> > > > No. Not talking about CTCSS, thats out of band signalling...on
> all
> > > > the
> > > > time with speech. Selcall is sent on trailing edge of speech.
> Can use
> > > > it on any radio system. Railways use it for identification of
> locos,
> > > > base calls, emergency alert, vigalence etc.
> > > > Sounds sort of like the tones you hear at the end audio cassette
> > > > tapes
> > > > but faster.
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Selcall has great uses, we use it for telemetry & telecommand.....wonderful
stuff!
experiment 1. Basic Analog and Digital Experiment #6 •••• this allows you
to read frequency may be a bit low for your use
jbh@x... wrote:
>
> The situation is that we use selcall a lot on the radio system I
> maintain. At the moment we use decoder units which are about $800 a
> pop. What I want to do was to use the stamp to copy one of these units
> function plus a lot more for a lot less money. We use selcall to poll
> our repeaters to query any alarms that appear. This gives use some
> indication of what could be wrong before we travel there. We can also
> start generators if batteries need a boost.
> Stamps can generate selcall nicely but decoding is a little more
> complex.
> Don't know what Nextel phones are but we only use radios on the
> network.
>
> --- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> > OK, so it is like the trunked radio stuff and the Nextel phones when
> you use
> > them as 2-way radios.
> >
>
> > I don't think decoding this is gonna do much though -- the main
> stuff on a
> > trunked radio system is on a separate data-only channel.
> >
> >
Original Message
> >
> >
> > > It sounds like a chirp when the mike is released
> >
> > > > No. Not talking about CTCSS, thats out of band signalling...on
> all
> > > > the
> > > > time with speech. Selcall is sent on trailing edge of speech.
> Can use
> > > > it on any radio system. Railways use it for identification of
> locos,
> > > > base calls, emergency alert, vigalence etc.
> > > > Sounds sort of like the tones you hear at the end audio cassette
> > > > tapes
> > > > but faster.
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
jbh@x... wrote:
>
> The situation is that we use selcall a lot on the radio system I
> maintain. At the moment we use decoder units which are about $800 a
> pop. What I want to do was to use the stamp to copy one of these units
> function plus a lot more for a lot less money. We use selcall to poll
> our repeaters to query any alarms that appear. This gives use some
> indication of what could be wrong before we travel there. We can also
> start generators if batteries need a boost.
> Stamps can generate selcall nicely but decoding is a little more
> complex.
> Don't know what Nextel phones are but we only use radios on the
> network.
>
> --- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> > OK, so it is like the trunked radio stuff and the Nextel phones when
> you use
> > them as 2-way radios.
> >
>
> > I don't think decoding this is gonna do much though -- the main
> stuff on a
> > trunked radio system is on a separate data-only channel.
> >
> >
Original Message
> >
> >
> > > It sounds like a chirp when the mike is released
> >
> > > > No. Not talking about CTCSS, thats out of band signalling...on
> all
> > > > the
> > > > time with speech. Selcall is sent on trailing edge of speech.
> Can use
> > > > it on any radio system. Railways use it for identification of
> locos,
> > > > base calls, emergency alert, vigalence etc.
> > > > Sounds sort of like the tones you hear at the end audio cassette
> > > > tapes
> > > > but faster.
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
long this frequency lasts for (20ms) then go straight into decoding
the next five different frequencies.If any of them don't last for 20ms
then it would be classed as a non decode. Sounds simple but how
simple?
A few people have asked how to generate it. The code is as follows.
FREQOUT 0,20,1747
FREQOUT 0,20,1358
FREQOUT 0,20,1124
FREQOUT 0,20,1197
FREQOUT 0,20,1747
FREQOUT 0,40,0
FREQOUT 0,20,1640
This equals code 84128 7 (7 being the status with a pause of 40ms
beforehand)
So as you can see, quite simple.
--- In basicstamps@y..., "L .Gaminde" <lgaminde@t...> wrote:
> could your read this with pulsin command
>
> jbh@x... wrote:
> >
> > The situation is that we use selcall a lot on the radio system I
> > maintain. At the moment we use decoder units which are about $800
a
> > pop. What I want to do was to use the stamp to copy one of these
units
> > function plus a lot more for a lot less money. We use selcall to
poll
> > our repeaters to query any alarms that appear. This gives use some
> > indication of what could be wrong before we travel there. We can
also
> > start generators if batteries need a boost.
> > Stamps can generate selcall nicely but decoding is a little more
> > complex.
> > Don't know what Nextel phones are but we only use radios on the
> > network.
> >
> > --- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> > > OK, so it is like the trunked radio stuff and the Nextel phones
when
> > you use
> > > them as 2-way radios.
> > >
> >
> > > I don't think decoding this is gonna do much though -- the main
> > stuff on a
> > > trunked radio system is on a separate data-only channel.
> > >
> > >
Original Message
> > >
> > >
> > > > It sounds like a chirp when the mike is released
> > >
> > > > > No. Not talking about CTCSS, thats out of band
signalling...on
> > all
> > > > > the
> > > > > time with speech. Selcall is sent on trailing edge of
speech.
> > Can use
> > > > > it on any radio system. Railways use it for identification
of
> > locos,
> > > > > base calls, emergency alert, vigalence etc.
> > > > > Sounds sort of like the tones you hear at the end audio
cassette
> > > > > tapes
> > > > > but faster.
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
not in the lookup table is not valid, the count command will run for 1 to
65535 mS give it a shot and let us know what the reading's are
jbh@x... wrote:
>
> yep. That would get the frequency alright but you also have to see how
> long this frequency lasts for (20ms) then go straight into decoding
> the next five different frequencies.If any of them don't last for 20ms
> then it would be classed as a non decode. Sounds simple but how
> simple?
>
> A few people have asked how to generate it. The code is as follows.
>
> FREQOUT 0,20,1747
> FREQOUT 0,20,1358
> FREQOUT 0,20,1124
> FREQOUT 0,20,1197
> FREQOUT 0,20,1747
> FREQOUT 0,40,0
> FREQOUT 0,20,1640
>
> This equals code 84128 7 (7 being the status with a pause of 40ms
> beforehand)
> So as you can see, quite simple.
>
> --- In basicstamps@y..., "L .Gaminde" <lgaminde@t...> wrote:
> > could your read this with pulsin command
> >
> > jbh@x... wrote:
> > >
> > > The situation is that we use selcall a lot on the radio system I
> > > maintain. At the moment we use decoder units which are about $800
> a
> > > pop. What I want to do was to use the stamp to copy one of these
> units
> > > function plus a lot more for a lot less money. We use selcall to
> poll
> > > our repeaters to query any alarms that appear. This gives use some
> > > indication of what could be wrong before we travel there. We can
> also
> > > start generators if batteries need a boost.
> > > Stamps can generate selcall nicely but decoding is a little more
> > > complex.
> > > Don't know what Nextel phones are but we only use radios on the
> > > network.
> > >
> > > --- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> > > > OK, so it is like the trunked radio stuff and the Nextel phones
> when
> > > you use
> > > > them as 2-way radios.
> > > >
> > >
> > > > I don't think decoding this is gonna do much though -- the main
> > > stuff on a
> > > > trunked radio system is on a separate data-only channel.
> > > >
> > > >
Original Message
> > > >
> > > >
> > > > > It sounds like a chirp when the mike is released
> > > >
> > > > > > No. Not talking about CTCSS, thats out of band
> signalling...on
> > > all
> > > > > > the
> > > > > > time with speech. Selcall is sent on trailing edge of
> speech.
> > > Can use
> > > > > > it on any radio system. Railways use it for identification
> of
> > > locos,
> > > > > > base calls, emergency alert, vigalence etc.
> > > > > > Sounds sort of like the tones you hear at the end audio
> cassette
> > > > > > tapes
> > > > > > but faster.
> > >
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
thoughts would be that you would have to wait for one of the ten
frequencies to appear then use the count command. Will give it a go
sometime and see how it works.
--- In basicstamps@y..., "L .Gaminde" <lgaminde@t...> wrote:
> Well how about trying the count command and a lookup table if the
value is
> not in the lookup table is not valid, the count command will run for
1 to
> 65535 mS give it a shot and let us know what the reading's are
>
> jbh@x... wrote:
> >
> > yep. That would get the frequency alright but you also have to see
how
> > long this frequency lasts for (20ms) then go straight into
decoding
> > the next five different frequencies.If any of them don't last for
20ms
> > then it would be classed as a non decode. Sounds simple but how
> > simple?
> >
> > A few people have asked how to generate it. The code is as
follows.
> >
> > FREQOUT 0,20,1747
> > FREQOUT 0,20,1358
> > FREQOUT 0,20,1124
> > FREQOUT 0,20,1197
> > FREQOUT 0,20,1747
> > FREQOUT 0,40,0
> > FREQOUT 0,20,1640
> >
> > This equals code 84128 7 (7 being the status with a pause of 40ms
> > beforehand)
> > So as you can see, quite simple.
> >
> > --- In basicstamps@y..., "L .Gaminde" <lgaminde@t...> wrote:
> > > could your read this with pulsin command
> > >
> > > jbh@x wrote:
> > > >
> > > > The situation is that we use selcall a lot on the radio system
I
> > > > maintain. At the moment we use decoder units which are about
$800
> > a
> > > > pop. What I want to do was to use the stamp to copy one of
these
> > units
> > > > function plus a lot more for a lot less money. We use selcall
to
> > poll
> > > > our repeaters to query any alarms that appear. This gives use
some
> > > > indication of what could be wrong before we travel there. We
can
> > also
> > > > start generators if batteries need a boost.
> > > > Stamps can generate selcall nicely but decoding is a little
more
> > > > complex.
> > > > Don't know what Nextel phones are but we only use radios on
the
> > > > network.
> > > >
> > > > --- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> > > > > OK, so it is like the trunked radio stuff and the Nextel
phones
> > when
> > > > you use
> > > > > them as 2-way radios.
> > > > >
> > > >
> > > > > I don't think decoding this is gonna do much though -- the
main
> > > > stuff on a
> > > > > trunked radio system is on a separate data-only channel.
> > > > >
> > > > >
Original Message
> > > > >
> > > > >
> > > > > > It sounds like a chirp when the mike is released
> > > > >
> > > > > > > No. Not talking about CTCSS, thats out of band
> > signalling...on
> > > > all
> > > > > > > the
> > > > > > > time with speech. Selcall is sent on trailing edge of
> > speech.
> > > > Can use
> > > > > > > it on any radio system. Railways use it for
identification
> > of
> > > > locos,
> > > > > > > base calls, emergency alert, vigalence etc.
> > > > > > > Sounds sort of like the tones you hear at the end audio
> > cassette
> > > > > > > tapes
> > > > > > > but faster.
> > > >
> > > >
> > > >
> > > > Your use of Yahoo! Groups is subject to
> > http://docs.yahoo.com/info/terms/
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/