Hello Brian My setup is similar : SDR with Phil's vCom and VAC 4.03. The difference is that the digital software is either PSK31 deluxe or the new DM780, both by HB9DRV, Simon Brown. I have not noticed any anormal drift between TX and RX.
Setup/audio/VAC : Buffer size : 2048 Sample rate : 48000 RX gain : -35 TX gain : 0 Enable VAC for digital modes Mono/Stereo : unchecked Good luck ! José F5JD Brian Kassel a écrit : > Hi John: > > Thanks for the message. Yes, the stability from turn on is no > problem at all for me. It is the 2-3 second drift from TX back to RX > that is worrisome. With so much help on the reflector, I feel sure > that we will find the answer. I wonder if any others that are using VAC > 4.03 with the virtual sound card, the N8VB virtual com ports and the SDR > with the digital mode programs MiXW and Digipan have see what I am > describing? AS I have determined that the PS is not at fault, assume > that the hardware in the SDR-1000 is OK, I am looking at possible > differences between my set up and other folks. This might give me a > clue with which to work. > > Brian K7RE > > John Basilotto wrote: > > >> Brian, >> >> The newer SDRs have a 3 minute stabilization period. The older units took 15 >> min to stabilize. The radio should be very stable after 3 minutes provided >> your power supply voltage is stable. I leave my SDR on 7/24 and experience >> about 5-10 Hz drift a day. I usually do an auto calibrate once a day and >> don't have any drift problems. >> >> John P. Basilotto >> W5GI >> Marketing and Sales >> 512 535-5266 >> >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of Brian Kassel >> Sent: Sunday, December 31, 2006 10:35 AM >> To: flexradio@flex-radio.biz; [EMAIL PROTECTED] >> Subject: [Flexradio] More Strange Frequency Drift Problem >> >> Folks: >> >> I have been told that with the newer SDR's (mine is only a few weeks old), >> no turn on drift should be experienced with the thermistor modification. >> However I see drift of probably 100 HZ or so immediately after turn on, for >> about 10 minutes or so. I have the feeling that the thermistor feature is >> not working in hardware. Am I correct? Is there any way to fix this? I am >> a retired electronic technician, and have a pretty good lab set up here, but >> don't want to void the warranty. Any and all help will be appreciated. >> >> Brian K7RE >> >> >> >> _______________________________________________ >> 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 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 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
