[App_rpt-users] Strange oscillation

[kb8ude at gmail.com]

I am still testing my hardware here on a dummy load and having strange behavior.  First, my hardware:

Dell P3 1.13GHz server, 1gb RAM, 36gb SCSI drive, installed via ACID CD.
URI interface, output cable about 6 inches long, twisted but not shielded.
Motorola Radius M120 UHF turned down to 20W.  Set as a simplex link and the channel is set to carrier squelch.

Set my audio levels using a Motorola service monitor.

Sometimes when the radio transmits I get clear voice.  Most of the time there is a noticeable low frequency oscillation on the signal and the audio is unreadable. Almost sounds like mid-rpm engine ignition noise if that helps paint a cleare picture of the sound.  RX seems good, I am listening using iaxrpt on the pc and can hear myself slightly delayed and clear.

I tried a couple ferrites on both sides of the URI with no change.  I also noticed that sometimes the 'connected' announcement has a ripping or tearing sound to it as well as stuttered courtesy tones on occasion.  I am wondering if my server just isn't fast enough or if the URI needs a 2.0 USB port to plug into.

Any thoughts folks?

-Shawn

Sent via BlackBerry from T-Mobile