Changing System ID: Should I re-program?

[mdgjedde]

I own and operate a RadioShack PRO-164, which I use from time to time on Knoxville, TN's trunking radio system. I just noticed an edit to the system here on the site:

July 2, 2011, 9:05 am (Changed System ID: [9F30 | | ] to [9F30 | 90.0 | ])

Should I reprogram the scanner to include this alteration, or would it make a difference? It's been programmed in since April. Last I checked everything worked fine.

Thanks!

Knoxville/Knox County Public Safety Trunking System, Knoxville, Tennessee - Scanner Frequencies

 

[jim202]

I own and operate a RadioShack PRO-164, which I use from time to time on Knoxville, TN's trunking radio system. I just noticed an edit to the system here on the site:

July 2, 2011, 9:05 am (Changed System ID: [9F30 | | ] to [9F30 | 90.0 | ])

Should I reprogram the scanner to include this alteration, or would it make a difference? It's been programmed in since April. Last I checked everything worked fine.

Thanks!

Knoxville/Knox County Public Safety Trunking System, Knoxville, Tennessee - Scanner Frequencies

I think you will find that the 90.0 is the connect tone. The system ID did not change. You don't use that connect tone on a scanner.

Sit back, cool your jets and enjoy the system like you were before.

 

[davidgcet]

that is the connect tone, not needed for scanners only for radios.

 

[OsloViking1975]

I own and operate a RadioShack PRO-164, which I use from time to time on Knoxville, TN's trunking radio system. I just noticed an edit to the system here on the site:

July 2, 2011, 9:05 am (Changed System ID: [9F30 | | ] to [9F30 | 90.0 | ])

Should I reprogram the scanner to include this alteration, or would it make a difference? It's been programmed in since April. Last I checked everything worked fine.

Thanks!

Knoxville/Knox County Public Safety Trunking System, Knoxville, Tennessee - Scanner Frequencies

Looks like to me it the thing that was added was the CTCSS 90.0

So no you don't have to.



The Continuous Tone Coded Squelch System, commonly referred to as CTCSS, has been in used in the land mobile radio arena from the late 1960’s. It is known by a number of different trade names such as Private Line® (PL) by Motorola, Channel Guard® (CG) by General Electric and generically as tone squelch.
It is a use of sub-audible tones that are transmitted along with the speech portion of the transmission which allows more than one agency (or fleet) to use the same radio frequency without causing undue interference to another agency on the that frequency. Receivers for agency XYZ are set to only open their audio squelch when the proper sub-audible frequency tone is part of the transmission.
The land mobile industry started with some 38 sub-audible frequencies this has increased over the years to the more generally accepted 50. There is no generic standard tone number assignment or code letter to go with a particular tone; however, below is a chart of the commonly accepted 50 tones used at this time.
67.0 94.8 131.8 171.3 203.569.3 97.4 136.5 173.8 206.571.9 100.0 141.3 177.3 210.774.4 103.5 146.2 179.9 218.177.0 107.2 151.4 183.5 225.779.7 110.9 156.7 186.2 229.182.5 114.8 159.8 189.9 233.685.4 118.8 162.2 192.8 241.888.5 123.0 165.5 196.6 250.391.5 127.3 167.9 199.5 254.1

 

[davidgcet]

the connect tone is not a PL tone, it is more like a hold tone that lets the repeater/controller know recieved traffic is still valid after initial UID validation. it is what generates the RSTAT and is continuously passed from the radio to the repeater and from there to the site controller for continued validation of the signal. lose the CT during a key up and the repeater drops out. i've chased many an issue with some radios putting out too low of a CT and the repeater dropping out after 1-2 seconds of key up but to the user the radio is still keyed. CT/PL are similar in that they are continuous subaudible tones, but serve different functions.

 

[Jay911]

mdgjedde, the ultimate answer is - nothing has changed about the system, only the RadioReference database has been updated to add info RR didn't have before. There's no need to do anything to your scanner.

 

[mdgjedde]

Thanks everybody for the prompt, informative replies!

 

[N1BHH]

Looks like to me it the thing that was added was the CTCSS 90.0

So no you don't have to.



The Continuous Tone Coded Squelch System, commonly referred to as CTCSS, has been in used in the land mobile radio arena from the late 1960’s. It is known by a number of different trade names such as Private Line® (PL) by Motorola, Channel Guard® (CG) by General Electric and generically as tone squelch.
It is a use of sub-audible tones that are transmitted along with the speech portion of the transmission which allows more than one agency (or fleet) to use the same radio frequency without causing undue interference to another agency on the that frequency. Receivers for agency XYZ are set to only open their audio squelch when the proper sub-audible frequency tone is part of the transmission.
The land mobile industry started with some 38 sub-audible frequencies this has increased over the years to the more generally accepted 50. There is no generic standard tone number assignment or code letter to go with a particular tone; however, below is a chart of the commonly accepted 50 tones used at this time.
67.0 94.8 131.8 171.3 203.569.3 97.4 136.5 173.8 206.571.9 100.0 141.3 177.3 210.774.4 103.5 146.2 179.9 218.177.0 107.2 151.4 183.5 225.779.7 110.9 156.7 186.2 229.182.5 114.8 159.8 189.9 233.685.4 118.8 162.2 192.8 241.888.5 123.0 165.5 196.6 250.391.5 127.3 167.9 199.5 254.1

Connect tones and CTCSS tones are unrelated. This is about the connect tone, not a CTCSS tone. There is also no such thing as CTCSS tone frequency of 90.0.

 

[W8RMH]

I might add CTCSS tones are not used on trunked systems.

 

[OsloViking1975]

Thanks guys for correcting me, because as you can see I really don't know anything about CT/PL/DCT I have a lot to learn, but I can program my PRO 106 manually LOL