Repeater Drop Out

[Tophtoh]

My Sheriff is on a conven. freq (460.475), PL 173.8, is there anyway I can turn something on to make an EOT tone, Instead of the annoying sound when the repeater drops out. I've heard thier actual radios before and it just fades away, like a trunking system would sound. I have a PRO-96, can I get my scanner to do the same thing thier radios do? Thanks

 

[SAR923]

First, it helps to let us know where you are and what system you're listening to. I don't really understand what tone you're hearing. With the Pro-96 and the PL tone entered, you should hear almost no squelch tail. Anything else you're hearing may be generated by the repeater system as some have a data burst at the end of transmission. The sheriff's department radios are programmed to not hear this data burst but there's nothing you can do with a Pro-96 as long as the data burst is transmitting with the same tone as the rest of the transmission.

 

[Thorny41587]

RE:

Okay, I have another question. My Sheriff dispatch radio hits the repeater. But I have heard some just sound like the dispatch radio is direct, and there is no repeater tail. Are they on the repeater or do they just have a lot of wattage? Cause the mobile units hit it.

 

[KB8UYC]

:evil:


Ok, if you want help, you need to tell everyone WHERE YOU ARE and WHAT SYSTEM IT IS THAT YOU ARE MONITORING!!!!! Without that, you probably are not going to get any help!

:!:

Eric

 

[nd5y]

On most systems that I have ever heard, when the dispatch consoles
are connected to the repeater sites via telco line or microwave, as they
typically are in public safety, there won't be any hang time or squelch
tail when the dispatcher releases the PTT switch.
Is this what you are referring to?

Tom

 

[loumaag]

In addtion to what Tom says, the dispatcher (in those types of setups) can actually still hear the field units while he/she is talking. This audio they are hearing does not make it to the repeater for you to hear normally but sometimes you might hear them (especially in a busy channel) actually seem to answer a field unit's question that you never heard.

 

[Thorny41587]

RE:

So it is still hitting the repeater, it just doesn't have a tail? And Eric, clam down, I not monitoring a SYSTEM it is a conventional frequency of: 460.475 PL: 173.8, Lucas County Sheriff, Ohio.

 

[loumaag]

Re: RE:

So it is still hitting the repeater, it just doesn't have a tail?

Ummm, if you mean the dispatcher in a hard wired console, probably not. In another words, the dispatcher doesn't use a radio to talk to the input of the repeater, they just use a telco line to the repeater transmitter directly, hence why they can hear (through the headphone) what is on the input channel while tying up the output channel with their signal.

 

[KB8UYC]

Re: RE:

So it is still hitting the repeater, it just doesn't have a tail? And Eric, clam down, I not monitoring a SYSTEM it is a conventional frequency of: 460.475 PL: 173.8, Lucas County Sheriff, Ohio.

I am very calm...all I was saying unless you tell us where you are it makes it kinda hard to help you out. But apparently somebody after I posted decieded to make me look dumb, so guess I wont be helping any more....

 

[scanfan03]

Re: RE:

So it is still hitting the repeater, it just doesn't have a tail? And Eric, clam down, I not monitoring a SYSTEM it is a conventional frequency of: 460.475 PL: 173.8, Lucas County Sheriff, Ohio.

A SYSTEM includes everything from trunked to Conventional. So yes you are listening to a system. These are all definitions to system:

1. A group of interacting, interrelated, or interdependent elements forming a complex whole.
2. A functionally related group of elements, especially:
a.The human body regarded as a functional physiological unit.
b.An organism as a whole, especially with regard to its vital processes or functions.
c. A group of physiologically or anatomically complementary organs or parts: the nervous system; the skeletal system.
d. A group of interacting mechanical or electrical components.
e. A network of structures and channels, as for communication, travel, or distribution.
f. A network of related computer software, hardware, and data transmission devices.
3. An organized set of interrelated ideas or principles.
4. A social, economic, or political organizational form.
5. A naturally occurring group of objects or phenomena: the solar system.
6. A set of objects or phenomena grouped together for classification or analysis.
7. A condition of harmonious, orderly interaction.
8. An organized and coordinated method; a procedure. See Synonyms at method.
9. The prevailing social order; the establishment. Used with the: You can't beat the system.

 

[Voyager]

My Sheriff is on a conven. freq (460.475), PL 173.8, is there anyway I can turn something on to make an EOT tone, Instead of the annoying sound when the repeater drops out. I've heard thier actual radios before and it just fades away, like a trunking system would sound. I have a PRO-96, can I get my scanner to do the same thing thier radios do? Thanks

No on the tone, but the PRO-96 supports squelch tail elimination just like the commercial radios do. You do have the PL programmed in your scanner and you are in SCAN mode, right?

Joe M.

 

[Voyager]

Re: RE:

Okay, I have another question. My Sheriff dispatch radio hits the repeater. But I have heard some just sound like the dispatch radio is direct, and there is no repeater tail. Are they on the repeater or do they just have a lot of wattage? Cause the mobile units hit it.

They may have land line to the repeater TX in various offices - just like the dispatch center probably does. With those, there is usually not a tail.

Joe M.

 

[loumaag]

... in SCAN mode, right?

Joe, the Pro-96 does not have to be in SCAN mode (or even CLOSED), unlike it's predecessors, as long as it has a code or tone programmed, it will rely on the code or tone for squelch.

 

[Thorny41587]

RE:

This is awesome, I've only heard trunking systems (now knows the definition of system), will all future scanners do this?

 

[Thorny41587]

RE:

Also, can the PRO 2052 do that?

 

[Voyager]

... in SCAN mode, right?

Joe, the Pro-96 does not have to be in SCAN mode (or even CLOSED), unlike it's predecessors, as long as it has a code or tone programmed, it will rely on the code or tone for squelch.

My mistake. It's only PROGRAM mode that the squelch doesn't work (it's CSQ - even if you have a tone programmed in)

Joe M.

 

[Thorny41587]

RE:

Why do PL tones for most public service freqs. tend to be higher such as 173.8, 123.0, 156.7, 151.4 etc. There seems to be a louder tone the higher on Hz you go.

 

[loumaag]

Re: RE:

Why do PL tones for most public service freqs. tend to be higher such as 173.8, 123.0, 156.7, 151.4 etc. There seems to be a louder tone the higher on Hz you go.

I am not sure what you mean by this. You can't hear the tones, they are sub-audible. Yes your radio may hum a bit, but it is not passing a 151.4 Hz tone.

 

[nd5y]

Every scanner and all but one ham rig I have ever owned DON'T filter
PL tones like quality commercial radios.

If you use a real speaker or headphones
with good bass response you can hear PL, DPL, LTR and the data stream
on Motorola & EDACS trunking voice channels all day long, and also
hear stuff well over 3 kHz.

Its not really subaudible anyway, normal human hearing is from ~ 20 Hz to 20 kHz.
Those tones are just below 300 Hz but high quality real radios only pass the
voice band of ~ 300 to 3000 Hz to the speaker.

Tom

 

[loumaag]

Tom, well, I am not sure about filtering out (except when in LTR mode) the low frequencies, but I sure can't hear them through any installed speaker (ham radio or scanner) and certainly not out of any quality communications speaker. Granted the average human hearing response is as you stated; however, to hear anything 20Hz to say 45Hz souinds reproduced you are going to need a Sub-Woofer. Full range, Hi-Fidelity speakers will go from about 45Hz on up past what you or I can hear, but we aren't talking about your stereo, we are talking about listening to commuications. A good communications speaker (say the Motorola's for example) have a range of about 300Hz to about 2000Hz peaking between 800Hz and 1000Hz where you really need it. Obviously if you are using a communications speaker (or even the cheapo placed in the scanner) you are not gonna hear CTCSS tones. This doesn't even count what the audio amp stages do to the signals.