I went chasing something similar last month with a URI. I was experiencing a high pitched whine on TX audio. I had a spare URI so I swapped them and the problem cleared up. I sent the URI back to DMK who replaced it at no charge and they are investigating the source at this time.

N5ZUA

----- Original Message -----

From: Ron Simpson

To: APP_RPT Mail List

Sent: Tuesday, January 24, 2012 1:08 PM

Subject: [App_rpt-users] Noisy Quad PCI audio

Hey guys,

I am running an 800mhz VIA ITX Board and a quad pci card. The board is 2004 vintage. I have a distinct noise on TX audio both through my node and remote base. I have shielded cables to both remotes, I have replace the power supply and greatly reduced the high pitch noise.

An interesting note: the tx audio port is quiet when first booting the node pc. Once asterisk is running the noise returns.

Has anyone seen this before? Do I have a bad main board or did I miss something else..

Thanks for your help!

73,

Ron - N6GKJ

73,

Ron - N6GKJ
Sent from Yahoo! Mail on Android

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