03/06/10 45 W - + 5 - 5 Morse Code?


What are those morse code-sounding beeps we've been hearing on Headquarters for the last week or two? Seems like they started after the CAD upgrade, though I am sure I have heard them before? Those in the know, please dash off an answer!



KII 313
lee - 03/07/10 - 00:48

KIQ-206
Silver - 03/07/10 - 01:09

Duh, so it’s really that simple? The frequency call signs as morse code?
Legeros - 03/07/10 - 09:19

I’m not sure, I was just anwering Lee!! I know Durham’s FCC I.D. is encrypted, don’t know if ours is the same.
Silver - 03/07/10 - 10:39

Yep. It is the FCC license. Still required on the VHF side while VIPER spits out it’s own callsign on the 800Mhz side.
Marshall Sherard KE4ZNR (Email) (Web Site) - 03/07/10 - 11:36

And I am guessing FCC regs require only daily transmission?
Legeros - 03/07/10 - 14:43

FCC requires it to go out once an hour, I believe… unless the call-sign of the station is spoken on a regular basis. This is why under old voice dispatching, the morse code was never heard… you always got, “Rescom/Raleigh Central/Headquarters… blah, blah, blah… WZX-555 KMCM-293/KIQ-206/KII-313.”
CJS (Email) - 03/07/10 - 15:36

CJS has it correct. Just like for us Ham Radio Operators the requirement was an hourly CW or voice Callsign on VHF/UHF. Once Trunking came about a little thing called “Base Station Identifier” was put into place. In a Moto trunked system (such as VIPER), the FCC requires that only the lowest RF frequency channel that is not a control channel transmit a station identifier. To prevent the IDer from transmitting on top of someone’s conversation, the system restricts voice traffic on the BSI channel unless no other channels (except more protected channels) are available. If you listen to a business LTR (Logic Trunked Radio) system you can hear each repeater ID in sequence. The IDs are still there, just in a little different format.
Marshall Sherard KE4ZNR (Email) (Web Site) - 03/07/10 - 21:45

Very cool. Thanks for the insight.
Legeros - 03/07/10 - 21:51

Here in OKC on our systems both 400 and trunked 800 they go out as a data burst that isnt heard by anybody. It makes me wonder if they jacked up something on the computer control of your radio system. the cad upgrade should have nothing to do with it at all. but then again our cad and our radio computers are totally separate. Oh how i miss the old motorola console with real live buttons. this computer control is nice most of the time but when it does give us fits its a terror to track down. All our radio traffic in OKC goes up the turnpike to tulsa to the master control and then back down to the slave here in OKC.
RAYMOND (Email) (Web Site) - 03/08/10 - 11:36

@Raymond No, nothing is “jacked up” as far as the way VIPER is constructed. It operates in exactly the manner one would expect of an 800Mhz mixed mode analog/digtal P16 3600 Baud Motorola system. It IDs via CW/Morse Code the way most Moto trunked systems due as I described earlier. Just depends on how the system is setup. Obviously the system in your area is configured differently but that does not make other systems such as VIPER “jacked up”.
Hope this helps provide come insight into the different ways different trunked systems work!
Marshall Sherard KE4ZNR (Email) (Web Site) - 03/08/10 - 23:05

Over the past few years there have been several changes to FCC regulations. Stations that are used primarily for paging/signalling are exempt from the ID requirement.
[RWECC] - 03/10/10 - 04:59



  
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