Nassau County Detectives-2?

[bezking]

Hi all,

Since at least yesterday, the usually quiet Detectives-2 (478.93750) has been acting up. Every 5 minutes or so 8 loud, monotone beeps are sounded, followed by what sounds like MDC1200. There has been at least one instance of people actually trying to communicate and the beeps just continue right over their comms. This sounds like a repeater issue as something similar happened a few months ago on 3+6. Anybody know what's up?

Thanks
Bezking

 

[tommyscan]

Yes,I hear this also. maybe there is some big surveillance ops going down somewhere in nassau because this channel is scrambled 99% OF THE TIME!!

 

[bezking]

Good to know. Thanks Tommy...


--bezking

 

[CloroxCowboy]

That is the surveillance channel "F9." It is analog only with transparent Securenet. The beeping you hear is a function that alerts users on the channel that encrypted transmissions are being made. Essentially an alert that the channel is in use. The sound at the end of a transmission, which is similar to the squawk of MDC-1200, is the sound of the Securenet feature in the repeater demodulating. It is the equivalent of a squelch tail. This happens because analog Securenet does not support PL/DPL tones. PL/DPL may be used to initially key-up the repeater, but once an encrypted transmission is underway the the squelch codes are stripped from the message.

 

[dave3825]

but once an encrypted transmission is underway the the squelch codes are stripped from the message.

That's strange I was getting 179.9 the whole time

 

[CloroxCowboy]

I've very occasionally heard that channel live for hours at a time. All carrier (in the clear) and no voice as if the repeater was just locked in Tx. Could your reception with PL have been a period of of keyup like this?