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P25 Issue - Moto Astro Spectra and Kenwood TK-5210

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txpss

Member
Joined
Jul 9, 2010
Messages
9
Location
College Station, TX
Ok guys im racking my brain here. Ive got a Motorola Astro Spectra (VHF W5 Hi Power trunk mount) and im working on programming in P25 channels. Ive been using a Kenwood TK-5210 P25 handheld and I can not get the motorola and the kenwood working correctly. The kenwood can transmit and the astro spectra will recieve and you hear audio. When you transmit from the Astro spectra the kenwood shows its picking up something but there is no audio at all.

Has anyone had any problems with kenwood and motorola like this? The only thing I can think of is to set the kenwood to a "receive all/open nac" setting instead of NAC setting i have it set on and see if I can get audio.

The motorola has been checked out by a radio shop and the kenwood has been to the factory to be fixed and retuned after someone broke the antenna connector.

Any ideas?

And just to put it out...

Motorola Astro Spectra
-----------------------------------
TX 158.61250 NAC 560
RX 158.61250 NAC 560
ASTRO System - 1
Digital Modulator Type - C4FM
Rx Unmute Rule - Normal Squelch
Unmute/Mute Type - And UnMute, Or Mute
RX Voice/Signal Type - ASTRO
Rx Unmute Delay (ms) - 1
Rx Emphasis - Checked
Busy LED - Checked
TX Time Out Timer - 1 (Infinite)
Transmit Deviation - 2.5 kHz
Trasmit Emphasis - Checked
Reverse Burst/Turn-Off Code - Checked
Channel Spacing - 12.5 kHz
Tx Voice/Signal Type - ASTRO


Kenwood TK-5210K3
-------------------------------
TX 158.61250 NAC 560
RX 158.61250 NAC 560
Squelch Type - NAC
Channel Type - P25
Channel Spacing - 12.5 kHz
 
Last edited:

txpss

Member
Joined
Jul 9, 2010
Messages
9
Location
College Station, TX
Its telling me unknown right now. Im using Astro CPS R05.03.00
I can say the system package is G48 / FLASHcode 100001-000000-7
When I decode the FLASHcode i get:
D12 B1 G806 G806 ASTRO IMBE Digital Operation
D7 B1 G48 G48 Conventional Systems Operation
 

RKG

Member
Joined
May 23, 2005
Messages
1,087
Make sure the Kenwood is programmed for narrow band ("N").
 

RFrunner

Member
Joined
Sep 5, 2011
Messages
14
The Motorola should not have pre-emphasis enabled for P25 mode. I'm surprised it's even an option.

Did the radio shop check out the Motorola radio P25 FM deviation?
 

txpss

Member
Joined
Jul 9, 2010
Messages
9
Location
College Station, TX
I turned off pre-emphasis and it still did not help. The motorola shop said everything was in working order with the radio. I will call them back and re ask them.
 

RFrunner

Member
Joined
Sep 5, 2011
Messages
14
Have you tried toggling the various P25 squelch modes? Can you hear audio when the Kenwood is set to "P25 monitor"? Also, what TGID are you set to? Same TGID for Mot and Kenwood?

I like radioman2001 suggestion about being too close to the Mot radio too. Could be overloading the Kenwood receiver.
 
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