911 Dispatch Radio Problems

[pepper33]

I also may have read this wrong.. the issue is at dispatch only? Are any field units complaining? Sorry, it's been a long day as I may have misinterpreted your post.

Pretty much dispatch only. Another problem is the Sheriff's Department bought TYT-UV-390 instead of a actual commercial radios and they suck. An officer got into a fight the other night and couldnt transmit due to the radio not getting out

 

[12dbsinad]

The officers can talk car to car just fine and the repeater works great on digital and analog. An officer can say a whole sentence and it not come through but we also have a Kenwood tk-7180 we can monitor with and it comes through on it but not the consoles. Also from the time we key up the consoles it takes 4-5 seconds before it keys the repeater. The consoles are ran with audio cable down to some kenwood nx-5700s in a closet rack mounted

Definitely sounds like a console problem then. Do you have a loging recorder? Have you checked the audio there?

 

[pepper33]

Definitely sounds like a console problem then. Do you have a loging recorder? Have you checked the audio there?

Yes everything sounds great on the recorder

 

[srich10]

Pretty much dispatch only. Another problem is the Sheriff's Department bought TYT-UV-390 instead of a actual commercial radios and they suck. An officer got into a fight the other night and couldnt transmit due to the radio not getting out

Wait....WHAT!?!? Who in the heck is running your requisition department!? TYT-UV-390 for Sheriffs Office Deputies!? Please tell me you’re trolling us...

 

[Project25_MASTR]

So let me get the base facts correct...

1. You have a Gai-Tronics ICP9000 console (which is DC/Tone/E&M capable from the doc's I've found online).
2. You are having issues when transmitting page tones (sounds like tones are not being sent)
3. Sometimes the console misses calls.
4. Logging recorder isn't missing the calls.
5. You have noise on the audio when transmitting.

Since DC is somewhat depreciated, I'm guessing your control station radios are interfaced either by E&M (sometimes referred to as local) or by tone remote adapters.

Does the logging recorder record the page tones correctly? If so, is it directly interfaced to the console or is it interfaced to the control stations individually?

When sending a page, has anyone listened to the output of the console at the control radio (or 66 block) and compared it to what audio is actually being modulated by the control station?

Where is the signalling being performed? The console or the control station? Is there a chance that the console also is handling CTCSS/DCS encode/decode?

Finally, the noise you are hearing is a telltale sign of RF back-feeding on the audio TX and RX lines which typically suggests leaky coax, poor routing, or grounding issues.

 

[Muffin]

So i work in a 911 dispatch center and i am a radio enthusiast. Recently we just upgraded and we are now running 2 Gai-tronics icp 9000 consoles which are connected to Kenwood NX-5700 Mobiles running in remote head mode. We are having problems with the pager tones for our fire and ems. The radio company says everything is right and they have ran multiple test but we are still are getting a wah wah and clicking noise when we transmit almost like alternator noise on a mobile radio running in a car. It is causing some pager tones to be shorter than usual and the pagers are only beeping a couple times instead of the full 4 seconds. Also on the Sheriff's Department channel lots of the incoming traffic is cut off and only the second half of that the incoming traffic is coming through. This channel is also on a DMR/Analog split repeater that auto switches. The fire/ems channel is not. Does anyone know what might be causing this. Radio company says its probably the weather causing this but we have never had problems like this before. Would be great if anyone had advice. thanks

Have you or anyone else tried installing a ferrite on the mic connection or the coax?

 

[R8000]

Another problem is the Sheriff's Department bought TYT-UV-390 instead of a actual commercial radios and they suck.

Red flag. Run away. I see no further need to internet engineer your system problems.

The best professional advice I can give you is, recommend to your supervisors to hire a reputable communications consultant asap. It's weird. Sometimes officials will listen to people if they pay them for the privilege.

A reputable consultant can come in and evaluate what you have, and point our ares of concern. A consultant (if involved before building a radio system) will protect both the customer and the vendor. With the consultant's report on legal file and public record, if things don't get fixed then someone is on the hook if somebody gets killed due to improper system engineering or poor workmanship.

 

[pepper33]

Wait....WHAT!?!? Who in the heck is running your requisition department!? TYT-UV-390 for Sheriffs Office Deputies!? Please tell me you’re trolling us...

No im serious. Another radio guy said these are the greatest and cheaper than anyone else. Admin was like that sounds great lets buy them

 

[mmckenna]

No im serious. Another radio guy said these are the greatest and cheaper than anyone else. Admin was like that sounds great lets buy them

Yeah, we see that periodically. Any chance the guy was an amateur radio operator? Some of the hams love those things, but don't understand the differences between them and good radios. (I'm a ham myself, but been working in the industry for about 30 years now…)

 

[pepper33]

Yeah, we see that periodically. Any chance the guy was an amateur radio operator? Some of the hams love those things, but don't understand the differences between them and good radios. (I'm a ham myself, but been working in the industry for about 30 years now…)

oh yeah he is a ham.

 

[LD723]

No im serious. Another radio guy said these are the greatest and cheaper than anyone else. Admin was like that sounds great lets buy them

A little off topic but do those officers with the issued tyt's have a speaker mic also?

 

[pepper33]

A little off topic but do those officers with the issued tyt's have a speaker mic also?

Yes and it is the worst muffled sound i have ever heard

 

[LD723]

Yes and it is the worst muffled sound i have ever heard

I am very surprised to see a police/sheriff's dept. with a tyt lol I wish I could see a picture of them with the tyt speaker mics on their lapels

 

[12dbsinad]

Yes and it is the worst muffled sound i have ever heard

What kind of Dept is this anyway? At this rate I bet they are using Hi Point pistols for 125 dollars.

 

[pepper33]

What kind of Dept is this anyway? At this rate I bet they are using Hi Point pistols for 125 dollars.

LOL most of them have glocks actually

 

[LD723]

I am very surprised to see a police/sheriff's dept. with a tyt lol I wish I could see a picture of them with the tyt speaker mics on their lapels

Honestly the kenwood speaker mic KMC-45D isn't a bad option for the tyt

 

[mmckenna]

oh yeah he is a ham.

Somehow I knew….

 

[mmckenna]

LOL most of them have glocks actually

Pretty typical for cops.
They're required to qualify at the range periodically. But rarely will they ever sit down to receive some radio training.
Their radios are a pretty important part of their equipment. They'll purchase decent firearms, but then go cheap on the radios.

 

[pepper33]

Somehow I knew….

Is there a way i can direct message you or email you some pictures of the setup

 

[mmckenna]

Is there a way i can direct message you or email you some pictures of the setup

Yeah, just click on my name, <— over there.