Chas,
Are you using and software based audio processing? I was running my
signal through CuBase and as soon as I added an effect, I got a 2 KHz
spike in my audio with what best can be described as a pulsing rushing
noise. Removing CuBase made the pulsing rushing noise go away, but the
2 KHz spike is still there. I bought a extra shielded, ferrites on both
ends Firewire cable (1 meter) and use Hosa cables for connection to the
SDR1K. It made no difference.
Several e-mails to Presonus has gone unanswered and I am getting rather
disgruntled over the situation. An information only e-mail to support
was answer in 24 hours. I have been waiting two weeks now :-(
The noise is not there with the Delta 44 card, so it is coming from
somewhere in the FireBox.
For PSK work, I just set the frequency at 1500 Hz and it is clean as a
whistle.
If I ever get an answer from Presonus, I'll let you know what they say.
-Tim
---
Tim Ellison ( [EMAIL PROTECTED] )
Integrated Technical Services ( http://www.itsco.com )
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Charles Greene
Sent: Monday, January 23, 2006 3:34 PM
To: FlexRadio@flex-radio.biz
Subject: [Flexradio] 1 KHz tone on SSB
Hi,
I have a 1 KHz tone on my signal when transmitting SSB. The 1KHz
signal is about 20 dB over the noise level at that frequency. It
does not occur when using VAC, and it does not occur when I key using
MOX with no mike is plugged in. I am using a Firebox. When I plug
a mike into the SDR box with a cable from the SDR box to the mike in
on the Firebox, I get the tone when I press the PTT. When I unplug
the cable from the SDR box to the mike in on the Firebox, and plug in
a different mike into the Firebox, I get the tone again, but it is
only 10 dB over the noise level at that frequency.Set the RF
power to 1 watt; no change. The tone is very stable, not like RF
feed back. There is no test in progress. Restart everything, no
change. Nothing seems unusual in the Firebox setup. Any one have
any suggestions?
73, Chas, W1CG
___
FlexRadio mailing list
FlexRadio@flex-radio.biz
http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Archive Link:
http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/
FlexRadio Homepage: http://www.flex-radio.com
