NYPD 10-13 alert tone

[silverbk]

Does anyone know how to make any radio do the NYPD alert tone for a 10-13? It sounds like 5 quick beeps.

[wiredwrx]

I do not believe this is buuilt into any radio. In fact, it is not a set length either. It is just a repeating tone for the length of the button press by the dispatcher.

It can probably be recreated in a mobile of base station, but getting it into a portable will be very difficult if at all possible.

You can record it, sample it, load it into an audio recording chip ( similar to the one in musical greeting card) and interface it into the audio tract of your unit.

Good luck.

Michael

[wiredwrx]

I do not believe this is buuilt into any radio. In fact, it is not a set length either. It is just a repeating tone for the length of the button press by the dispatcher.

It can probably be recreated in a mobile of base station, but getting it into a portable will be very difficult if at all possible.

You can record it, sample it, load it into an audio recording chip ( similar to the one in musical greeting card) and interface it into the audio tract of your unit.

Good luck.

Michael

[Pj]

I have never heard it...but assuming Motorola consoles...

Alert 1 - Steady tone
Alert 2 - Hi/Low tone
Alert 3 - Steady beep

All will sound as long the button is pressed.

I believe you could also get custom tones, but those are/were the three basic tones.

The Astro portables have an "evacuation" tone that can be enabled. This produces a hi/low tone by pressing the PTT and Emergency button at the same time.

[alex]

Yeah, I've heard the NYPD tone several times before, it's a fast paced version of alert 1, just a lower frequency tone.

I don't know how they are doing it, it's probably a special signaling BIM if they are using centracom's.

-Alex

[mr.syntrx]

From this thread:

http://groups.google.com.au/group/misc. ... 0ff300166e

From: Steve & Susan - view profile
Date: Thurs, Nov 11 1999 12:00 am
Email: moc.enilepip@ykkams (Steve & Susan)
Groups: misc.emerg-services
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fub...@my-deja.com wrote:
>it is still true today

Yes, but it wasn't true when Embassy system went online.

>if the dispatcher has the headset on she can hear u on the recieve side
>of the voted audio. when they dont wear the headset the voted audio is
>heard on the unselected speaker side of the console.
>all the changes took place when they went from the old bramco consoles
>to the motorola centracom console.
>and the process is commonaly called 4 wire audio...

When they built the CC-II with the Embassy switch, there was an issue
Motorola LMPS Large Systems had to deal with:

Normal CC-II configuration was that the transmit channel is muted
while the dispatcher is keyed. After 11 Metrotech went online, the
COIM board had to be reflashed with SP firmware to emulate the duplex
operation of the Bramco consoles, not only with unmuted 4-wire audio,
but to emulate a distinctive 10-13 alert tone that did not sound like
the customary Motorola (slow) beeps, steady tone or warble tone.

Simply supplying four-wire audio just means there is a non-hybrid
full-duplex path. It doesn't speak to what the console does with the
audio.

You can build a simple circuit from a Curtis 8044M CMOS IC that will
let you play 10-13 all day.

Steve