Digital / Analog Patch

[DPS8504]

My communications facility will be converting to P25 Digital in the next month or so. We currently has dual Motorola Gold Radio Consoles. One repeater located at Decatur is already digital, with my main channel and a repeater at Throckmorton to be converted with in about a month. My question is that some of the interoperability channels will remain in the analog mode, can we patch the Digital and Analog channels together during pursuit or other emergency type situation?

thanks for your help.

 

[WayneH]

Yes, but the audio will sound terrible. Useable but the quality will suffer.

 

[DPS8504]

We did some testing the past few days, the audio was pretty bad when patching the analog and digital repeater together. I hope it improves once we are all digital.

 

[N4DES]

Interesting as we do it on a 3600 trunking system and it sounds just fine. You can tell the difference, but the audio is still intelligible.

 

[DPS8504]

Interesting as we do it on a 3600 trunking system and it sounds just fine. You can tell the difference, but the audio is still intelligible.

We are not trunked, conventional going to P25 digital. The Throckmorton repeater is 68 miles line of sight from the Control Station, the Decatur Repeater is 45 miles from it's control station and link to my console by microwave. The repeaters are a little over 90 miles apart. I don't know if the distance has anything to do with it, but the Troopers I talked to the other day said they could hear each other and understand what was being said, just a lot of static.

Once we switch over to digita, we will do some more testing.

Thanks for the replies.

 

[mam1081]

We are not trunked, conventional going to P25 digital. The Throckmorton repeater is 68 miles line of sight from the Control Station, the Decatur Repeater is 45 miles from it's control station and link to my console by microwave. The repeaters are a little over 90 miles apart. I don't know if the distance has anything to do with it, but the Troopers I talked to the other day said they could hear each other and understand what was being said, just a lot of static.

Once we switch over to digita, we will do some more testing.

Thanks for the replies.

How good is the link from the WF dispatch to the Decatur repeater? I've heard the dispatcher cut out on the repeater before - not something you usually hear.

Static? on digital? I wouldn't think the P25 vocoder knows what to do with that sound...

 

[N4DES]

OK...let me ask, how stable is the microwave link and is it analog or digital?
Could the issue be in the link and not in the recovered audio from the field units?

Mark

 

[jparks29]

One thing about digital communications.......

you either have a signal, or you don't......

there is no 'static' in digital radio, only no service, or missed packets (machine gunning,broken record, whatever you call it)

 

[WayneH]

One thing about digital communications.......

you either have a signal, or you don't......

there is no 'static' in digital radio, only no service, or missed packets (machine gunning,broken record, whatever you call it)

You can still have chirping and robotic-like vocals. So it's not necessarily clear voice or nothing at all. I'd call that the 'static' version for digital.

 

[grcjrsc]

You can still have chirping and robotic-like vocals. So it's not necessarily clear voice or nothing at all. I'd call that the 'static' version for digital.

The term I've heard aroud here is "Space Talk"

 

[jparks29]

You can still have chirping and robotic-like vocals. So it's not necessarily clear voice or nothing at all. I'd call that the 'static' version for digital.

lol

there is no 'static' in digital radio, only no service, or missed packets (machine gunning,broken record, whatever you call it)

yeah, exactly what I said