[AG-TECH] hiss from gentner AP800

[Stewart, Corbin J]

We are also experiencing a hiss.  We're using the AP400 with Analog
MatchMaker.
Like you we've traced all the connections and we are 
about to swap out the soundcard.  We have the added problem that we cannot
send
audio.  The genter's meters indicate that signal is being sent to the audio
server
but the RAT doesn't seem to see it.

Sorry I don't have an immediate solution but I'll let you know if we get rid
of the
hiss.

---------------------------------------------------------------
Corbin Stewart				     cjstewa at sandia.gov

Videoconferencing & Collaborative Environments
Sandia National Laboratories California
925-294-4856




-----Original Message-----
From: James Miller [mailto:millerjw at mailer.psc.edu]
Sent: Monday, November 26, 2001 11:30 AM
To: Access Grid Techs mailing list (E-mail)
Subject: [AG-TECH] hiss from gentner AP800


I am trying to resolve a major hiss problem with our AG node.  I am getting
a lot of hiss out of my monitor speakers.  I think I have narrowed it down
to a problem with the AP800.  If I disconnect all of my inputs to the
gentner, the hiss is still there.  When I disconnect the speakers, the hiss
stops.  This tells me the hiss is not coming from cable interference to the
speakers and it is not coming from the MatchMaker/Audio node.  If I mute all
of my inputs, the hiss remains.  If I mute the speaker output from the
gentner, the hiss lessens, but does not disappear.

Has anyone had similar experiences?

Jim Miller
Network Engineer
Pittsburgh Supercomputing Center
4400 Fifth Avenue
Pittsburgh, PA 15213

mailto:millerjw at psc.edu
412.268.6073