repairman222
Member
Believe it or not I live next to a county that still uses point to point, 155.370 mhz. There county is not with MOSWIN system. would anyone know the audio option, CTCSS? Thank you group members..
Missouri Point to Point
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Most of the St Louis region still uses the old analog point to point channels. The same applies to the old Sheriff's net channel as well.
A far as the PL tones used, if your scanner can use tone squelch then it will usually also have a way to search for the tones being used when it stops on an active channel.
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- Retired 40 Year Firefighter NW Tenn
In Tennessee 155.370 is open squelch no tones.
Yes, I forgot to state the same for the St Louis area that no tones are used.
However, I think St Louis County does send a PL tone when they send the CW callsign for their license.
I always assumed they have their radios setup in reverse and mute the audio when the tone is heard.
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Back in the old days each town and county had a 3 digit rotary pluse like a phone system like Hospital's used on Ambulance to Hospital traffic.
repairman222
Member
Mutual Aid and Sheriffs Net Has 156.7 listed I thought Mutual Aid might be the same 156.7?
repairman222
Member
Should I leave it on Search or CTCSS SEARCH?
stlouisx50
Member
Yes, leave search enabled. Some agencies use a search tone, but some others don't. Receiving stations obviously are in a no tone mode because 1 toned agency ca. Talk to the non toned.
However if you happen to like a particular agency and they use a tone and you don't want to hear those who don't, you can then use the squelch tone.
repairman222
Member
Its not tones, its the CTCSS NUMBERS.
Use Search so it will find both CTCSS type tones as well as DCS tones if any are being used.I monitored 155.370 all day today and not one station was using a squelch tone any longer. The county also appears to have stopped sending a PL tone when they broadcast the CW ID like they used to.
I didn't check 155.730. And 155.475 is used around this area heavily by Illinois as the channel they call ISPERN so I don't monitor it either. Most of the ISPERN traffic is DWI bolo's that are rather boring.
For regular point to point on 155.370, you probably won't find any tones in use these days. That's what I found today after several hundred calls logged but no tones logged at all.
repairman222
Member
Thanks for the info..
wtp
Member
the thing about tones is,
if you set it wrong, you hear nothing,
if they change it, you hear nothing.
if you leave it alone, you hear everything.
i take the leave it alone method.
remember, you don't need the tone to hear them.
if you set it wrong, you hear nothing,
if they change it, you hear nothing.
if you leave it alone, you hear everything.
i take the leave it alone method.
remember, you don't need the tone to hear them.
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stlouisx50
Member
Ctcss are analog tones and DCS are digital tones. These tones are squelch tones, not actual tone out tones.
repairman222
Member
So leave it on Search or CTCSS Search? Also what is NAC tones? Thank you...
DeoVindice
P25 Underground
NAC is a Network Access Code, essentially the P25 equivalent to CTCSS. It's not applicable to an analog system.
wtp
Member
repairman222, why leave it on search ?
you radio might get it wrong as i have heard about a digital tone being decoded as an analog one.
also CTCSS and DCS are for analog systems.
one is a steady actual tone in hertz and the digital one is just a digital signal on the analog signal.
both should not be heard out of you speaker
and the NAC thing is on a digital system and is also a digital thing as computer "talk" in ones and zeros.
you radio might get it wrong as i have heard about a digital tone being decoded as an analog one.
also CTCSS and DCS are for analog systems.
one is a steady actual tone in hertz and the digital one is just a digital signal on the analog signal.
both should not be heard out of you speaker
and the NAC thing is on a digital system and is also a digital thing as computer "talk" in ones and zeros.
repairman222
Member
wtp
Member
DCS is the digital version of CTCSS/PL.
so instead af a low frequency hum it is a morse code thing going on as in ones and zeros on an analog system
NAC is what they use on a digital system
from a lookup for DCS
CDCSS or Digital Code Squelch (DCS) is a further development of the continuous tone-coded squelch system or CTCSS that uses a slow-speed, binary data stream passed as sub-audible data along with the transmission. Motorola calls this Digital Private Line or DPL. DCS is a two way, 3-digit, digitally encoded code.
and repairman, i wish we could do this in personal messsages, if you could open that up.
so instead af a low frequency hum it is a morse code thing going on as in ones and zeros on an analog system
NAC is what they use on a digital system
from a lookup for DCS
CDCSS or Digital Code Squelch (DCS) is a further development of the continuous tone-coded squelch system or CTCSS that uses a slow-speed, binary data stream passed as sub-audible data along with the transmission. Motorola calls this Digital Private Line or DPL. DCS is a two way, 3-digit, digitally encoded code.
and repairman, i wish we could do this in personal messsages, if you could open that up.
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repairman222
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Leave it on CSQ and call it a day.
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