APX 6500 and 8500 audio issues

[Michaeltoth7]

The department I work for just switch out the mobile radios within some of the apparatus. Added a 6500 and 8500 to the trucks. We’ve noticed since replacing them that the receive audio has been garbage. Although the transmit audio is crystal clear. Originally we thought the issue may have been from the radio installation guys changing out the antenna connector (using the same antenna cord from the previous radios), but we also got a new assistant chef’s vehicle that has the same model radios, but were installed by a different company and he’s experiencing the same radio issues. The radios were all programmed at the same time from Motorola. The antennas for the 6500 are laird (same ones used with old mobiles) but we’ve never had issues with them. The trucks that didn't get upgraded mobiles are not having receive issues, so it’s not a bad reception area of town. Just looking to see if anyone has any ideas, thank you.

 

[KevinC]

the receive audio has been garbage.

Define that a little better.

 

[N4DES]

I'd like to know what radios did you migrate from and what area of the spectrum (V, U, 700/800) are you in?

 

[Michaeltoth7]

Define that a little better.

Very scratchy

 

[Michaeltoth7]

I'd like to know what radios did you migrate from and what area of the spectrum (V, U, 700/800) are you in?

We had icom’s in those two trucks before the switch. We still have icoms in 6 other trucks but those are not experiencing issues. We are UHF, and the radios that were added are a 6500 (UHF) and 8500 (U, V, 7/8)

 

[MTS2000des]

Yep, and is it P25 conventional, trunking or analog? A whole lot missing here.

 

[dickie757]

Check the audio ground (negative, really) going into the cabin intercom system. Make sure it is isolated

 

[Michaeltoth7]

Yep, and is it P25 conventional, trunking or analog? A whole lot missing here.

It’s just analog

 

[K2NEC]

If a company came and installed them, why don't you reach out to the company to come diagnose and fix this? I assume the company was paid for a full working install, if you got anything less then that, they should be contacted so they can fix it. These are public safety radios, not sure this is an issue for a hobby forum and not for nothing but you aren't being very helpful or descriptive with your details.

 

[N4DES]

Narrowband/Wideband programming error in the codeplugs could be a possibility.

 

[12dbsinad]

Narrowband/Wideband programming error in the codeplugs could be a possibility.

Radios are forced narrowband anyway regardless after the 2013 mandate , so moot point. Hard to believe an agency pays tens of thousands of dollars for equipment and has to post on RR because it doesn't work right, unreal. Doesn't sound like a very competent radio shop if you ask me.