CTCSS Decoding
 

I would like to try an decode CTCSS tones with my scanner. Most software
that is out there to do this, you must have a discriminator tap so it will
grab the audio better.

I am using WinTone without a discriminator tap, just straight audio into the
line input soundcard. This seems to work somewhat well, but I was wondering
if there is any other program's out there that would be able to do the same
job but without having to use a discriminator tap.

Also, the same goes for decoding trunking systems etc....especially Motorola
systems. Is there any program's out there that will do this with the
straight audio going into the sound card?


Thank you

On Wed, 1 Dec 2004 21:33:38 -0500, "RadioMan2"
m said in
alt.radio.scanner:

I am using WinTone without a discriminator tap, just straight audio into the
line input soundcard. This seems to work somewhat well, but I was wondering
if there is any other program's out there that would be able to do the same
job but without having to use a discriminator tap.

It's not the program. Most radios have a high-pass filter in the
audio so that you don't hear the CTCSS tone.

Al Klein wrote:
It's not the program. Most radios have a high-pass filter in the
audio so that you don't hear the CTCSS tone.

No, most radios have a three-inch speaker that can't reproduce the
CTCSS tone. If you plug a hi-fi speaker into most radios, you'll hear
the CTCSS just fine.

--
The state religion of the USA is atheism, as established by the courts.

clifto wrote:

Al Klein wrote:
It's not the program. Most radios have a high-pass filter in the
audio so that you don't hear the CTCSS tone.

No, most radios have a three-inch speaker that can't reproduce the
CTCSS tone. If you plug a hi-fi speaker into most radios, you'll hear
the CTCSS just fine.

No, don't think so. The CTCSS tones are 'sub-audible', that is, they are below
the range that humans can hear.

dxAce
Michigan
USA



--
The state religion of the USA is atheism, as established by the courts.

dx'tard wrote:



No, don't think so. The CTCSS tones are 'sub-audible', that is, they are below
the range that humans can hear.

You are wrong. Not to say you are a lying.

This is a list of commonly used PL/CTCSS tones
(all in Hz):

67.0 69.3 71.9 74.4 77.0

79.7 82.5 85.4 88.5 91.5

94.8 97.4 100.0 103.5 107.2

110.9 114.8 118.8 123.0 127.3

131.8 136.5 141.3 146.2 151.4

156.7 162.2 167.9 173.8 179.9

186.2 192.8 203.5 206.5 210.7

218.1 225.7 229.1 233.6 241.8

250.3 254.1

You will see that they are very audible on a decent system. The only
reason they are not audible on systems using this tones -and some others
too- is, that they are using a high pass filter cutting all freqs below
300Hz or so.

Volker Tonn wrote:

dx'tard wrote:


No, don't think so. The CTCSS tones are 'sub-audible', that is, they are below
the range that humans can hear.

You are wrong. Not to say you are a lying.

This is a list of commonly used PL/CTCSS tones
(all in Hz):

67.0 69.3 71.9 74.4 77.0

79.7 82.5 85.4 88.5 91.5

94.8 97.4 100.0 103.5 107.2

110.9 114.8 118.8 123.0 127.3

131.8 136.5 141.3 146.2 151.4

156.7 162.2 167.9 173.8 179.9

186.2 192.8 203.5 206.5 210.7

218.1 225.7 229.1 233.6 241.8

250.3 254.1

You will see that they are very audible on a decent system. The only
reason they are not audible on systems using this tones -and some others
too- is, that they are using a high pass filter cutting all freqs below
300Hz or so.

That is correct. So... plugging the radio into a better speaker will therefore not
help... unless the high pass filter is disabled.

dxAce
Michigan
USA

dx'tard wrote:

That is correct. So... plugging the radio into a better speaker will therefore not
help... unless the high pass filter is disabled.

Most VHF/UHF receivers are not having a highpass filter going so high
(300Hz) but only to about 55 Hz in Europe or 65 Hz in US because of the
mains freqs. It's only the transceivers wich are using these tones
having the freqs up to 300Hz blocked to the AF-stage.
It's simple enough to tap the discriminator output on the RX-section of
nearly any (T)RX.
I have a handheld scanner provinding the CTCSS-tones just out of the
headphone jack. The built-in speaker is too tiny to go below 150Hz.
BTW the higher tones above 150Hz are not used very often.

Volker Tonn wrote:

dx'tard wrote:

That is correct. So... plugging the radio into a better speaker will therefore not
help... unless the high pass filter is disabled.

Most VHF/UHF receivers are not having a highpass filter going so high
(300Hz) but only to about 55 Hz in Europe or 65 Hz in US because of the
mains freqs. It's only the transceivers wich are using these tones
having the freqs up to 300Hz blocked to the AF-stage.
It's simple enough to tap the discriminator output on the RX-section of
nearly any (T)RX.
I have a handheld scanner provinding the CTCSS-tones just out of the
headphone jack. The built-in speaker is too tiny to go below 150Hz.
BTW the higher tones above 150Hz are not used very often.

Thanks Deutsche'tard.

dx'tard schrieb:



Thanks Deutsche'tard.

My pleasure.

hugs and kisses

On Wed, 1 Dec 2004 21:33:38 -0500, "RadioMan2"
m wrote:

I would like to try an decode CTCSS tones with my scanner. Most software
that is out there to do this, you must have a discriminator tap so it will
grab the audio better.

Not that it helps you but in RTFMing the manual on my handheld 2m/70cm
transciever it will decode the CTCSS tone. This has to be done on the
receive frequency though so I'd have to be in range of the
transmitting radio rather than the repeater.

Tony

RadioMan2 schrieb:

... Is there any program's out there that will do this with the
straight audio going into the sound card?

It depends on the AF-stage in the radio and the filtering wich is done
there. Some radios do better some don't.
It's not a programmable feature on the decoding program!

AWWWW little steavie doesn't like being called a tard?

dxAce wrote:

Volker Tonn wrote:


dx'tard wrote:


That is correct. So... plugging the radio into a better speaker will therefore not
help... unless the high pass filter is disabled.

Most VHF/UHF receivers are not having a highpass filter going so high
(300Hz) but only to about 55 Hz in Europe or 65 Hz in US because of the
mains freqs. It's only the transceivers wich are using these tones
having the freqs up to 300Hz blocked to the AF-stage.
It's simple enough to tap the discriminator output on the RX-section of
nearly any (T)RX.
I have a handheld scanner provinding the CTCSS-tones just out of the
headphone jack. The built-in speaker is too tiny to go below 150Hz.
BTW the higher tones above 150Hz are not used very often.


Thanks Deutsche'tard.

In article ,
says...


clifto wrote:

Al Klein wrote:
It's not the program. Most radios have a high-pass filter in the
audio so that you don't hear the CTCSS tone.

No, most radios have a three-inch speaker that can't reproduce the
CTCSS tone. If you plug a hi-fi speaker into most radios, you'll hear
the CTCSS just fine.

No, don't think so. The CTCSS tones are 'sub-audible', that is, they are below
the range that humans can hear.

dxAce
Michigan
USA



--
The state religion of the USA is atheism, as established by the courts.


No, just on most radios, the low end is cut off by
filters and the crappy speaker. The tone on the Ohio
Turnpike troopers on 155.790 and 155.685 is one af about
a half dozen that can be easily heard around the Toledo
area. It's the "whine" in the background...

If you can't hear from 50-200hz, you have serious
problems...;)

BDK

whoever wrote:

AWWWW little steavie doesn't like being called a tard?

How about you, 'tard boy?

dxAce
Michigan
USA

BDK wrote:

In article ,
says...


clifto wrote:

Al Klein wrote:
It's not the program. Most radios have a high-pass filter in the
audio so that you don't hear the CTCSS tone.

No, most radios have a three-inch speaker that can't reproduce the
CTCSS tone. If you plug a hi-fi speaker into most radios, you'll hear
the CTCSS just fine.

No, don't think so. The CTCSS tones are 'sub-audible', that is, they are below
the range that humans can hear.

dxAce
Michigan
USA



--
The state religion of the USA is atheism, as established by the courts.


No, just on most radios, the low end is cut off by
filters and the crappy speaker. The tone on the Ohio
Turnpike troopers on 155.790 and 155.685 is one af about
a half dozen that can be easily heard around the Toledo
area. It's the "whine" in the background...

If you can't hear from 50-200hz, you have serious
problems...;)

No problem here, my ears are quite good. My point was that with most radios, whether
one uses a good speaker system or not, the tones won't be heard.

That being due to the high pass filter. If you are hearing them, then perhaps your
system is not really up to par, or there are other issues with the transmitting
system which you have no control over.

dxAce
Michigan
USA

There ya go, I didn't call you anything and you start again?

dxAce wrote:

whoever wrote:


AWWWW little steavie doesn't like being called a tard?


How about you, 'tard boy?

dxAce
Michigan
USA

whoever wrote:

There ya go, I didn't call you anything and you start again?

Start? Hell, I was just putting the icing on, 'tard boy.

dxAce
Michigan
USA



dxAce wrote:

whoever wrote:


AWWWW little steavie doesn't like being called a tard?


How about you, 'tard boy?

dxAce
Michigan
USA

Make up your mind TARDGIRL, are they 'sub-audible' or are they filtered?

TURDGIRL wrote:
"No, don't think so. The CTCSS tones are 'sub-audible', that is, they
are below
the range that humans can hear."


dxAce
Michigan
USA

Volker Tonn wrote:
"You will see that they are very audible on a decent system."

TURDGIRL wrote:
"That is correct. So... plugging the radio into a better speaker will
therefore not
help... unless the high pass filter is disabled."

This is what happens when they made low codes general!

TURDGIRL wrote:

whoever wrote:


There ya go, I didn't call you anything and you start again?


Start? Hell, I was just putting the icing on, 'tard boy.

dxAce
Michigan
USA



dxAce wrote:

whoever wrote:



AWWWW little steavie doesn't like being called a tard?


How about you, 'tard boy?

dxAce
Michigan
USA

whoever wrote:

Make up your mind TARDGIRL, are they 'sub-audible' or are they filtered?

TURDGIRL wrote:
"No, don't think so. The CTCSS tones are 'sub-audible', that is, they
are below
the range that humans can hear."

Make up your mind 'tard boy... am I TARDGIRL or TURDGIRL?

LMAO at the 'tard boy,

dxAce
Michigan
USA

Why not answer the question Steven?
Make up your mind, are they 'sub-audible' or are they filtered?
Or is the best you can do is call people names?

TURDTHING wrote:

Make up your mind 'tard boy... am I TARDGIRL or TURDGIRL?

LMAO at the 'tard boy,

dxAce
Michigan
USA

Why ask me? Look in the mirror.
Be very careful when you LYAO cause there may be nothing left of you,
you'll laugh yourself away!

whoever wrote:

Why not answer the question Steven?
Make up your mind, are they 'sub-audible' or are they filtered?
Or is the best you can do is call people names?

I'm just following in your footsteps, 'tard boy!

dxAce
Michigan
USA

On Sat, 04 Dec 2004 23:19:15 GMT, Tony VE6MVP
said in alt.radio.scanner:

On Wed, 1 Dec 2004 21:33:38 -0500, "RadioMan2"
wrote:

I would like to try an decode CTCSS tones with my scanner. Most software
that is out there to do this, you must have a discriminator tap so it will
grab the audio better.

Not that it helps you but in RTFMing the manual on my handheld 2m/70cm
transciever it will decode the CTCSS tone. This has to be done on the
receive frequency though so I'd have to be in range of the
transmitting radio rather than the repeater.

Many repeaters transmit the CTCSS tone.