You are aware that if your cabling is picking up noise or there are ground loops in your setup, they will not go away by turning off the SDR-1000 (which really doesn't turns it off). Noise can also be picked up on the mike cable with the microphone disconnected.
Is the mike connected to the sound card directly or is it going through the SDR-1000? You have not mentioned the nature of the noise which makes it hard to guess here. If the noise is hum or a raspy hum then ground loops are being a problem and a trip to Radio Shack to purchase a pair of audio isolation units may do the trick for you, if the noise is something else then you are going to do a little detective work to find it's source. If it's the software others should be noticing the problem also, any other recent complaints? At 11:26 AM 2/11/2007, Gerald Capodieci wrote: >The Knowledge Base doesn't cover this issue. > When I depress the MON and MOX buttons I monitor a noise in my > headphones and see it on the Panadapter in as the transmit signal. > The noise is present at the same level with the SDR1000 and power > supply switched off. It's present with the Microphone disconnected > as well. The noise is much more prevalent under the following conditions: > . MON and MOX are checked > . Transmit Equalizer enabled and the preamp increased any amount above 0 > . Mic Gain set higher than 35 > . When Mic Boost box checked noise is really increased > The noise seems to be generated in software during its > amplification. Note; it's present even without the mic plugged in, > and the SDR1000 is powered down. > If this noise is in-fact generated in the software especially > when the gain in increased, an external preamp between the mic and > the D44 box would reducing the need for gain in software thereby > reducing software noise. However, an external preamp may introduce > its own noise. > Please repeat the above conditions and offer suggestions (perhaps > the noise level is inconsequential, I just don't know) > Jerry > >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: >http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070211/4835c6da/attachment.html > > >_______________________________________________ >FlexRadio mailing list >FlexRadio@flex-radio.biz >http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz >Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ >FlexRadio Homepage: http://www.flex-radio.com/ > >FlexRadio Knowledge Base: http://kb.flex-radio.com/ Cecil KD5NWA www.qrpradio.com www.hpsdr.com Cum catapultae proscriptae erunt tum soli proscripti catapultas habebunt. (When catapults are outlawed, only outlaws will have catapults!) _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
