Scott, I also use D44 card 96k and 2048 Buffer. But there is one thing I forgot to tell you (sorry for that!): a while ago I replaced the old original Low-Noise AMP (SGA-4586) with a Gali74 LNA. The Gali74 gives 10dB more gain than the SGA6286 that is used in the new SDR-1000 Version. The price for the higher gain and sensitivity is worse Input IP3 (abt10dB) down. On shortwave bands I always use preamp-med settinng (10dB Attenuator) to reduce overdrive and phantom signals. So I think your readings might be ok if you have the SGA6286 installed. Maybe someone with original SDR-hardware can confirm your readings.
73's Martin ----- Original Message ----- From: "Scott Gordon" <[EMAIL PROTECTED]> To: <FlexRadio@flex-radio.biz> Sent: Thursday, August 17, 2006 3:59 PM Subject: Re: [Flexradio] Signal to Noise > Martin, > > I am using the D44 M-Audio sound card. I have not calibrated it > within the flex setup. Could that be a issue? Mostly use sample 96,000 > and 2048 buffer. > > Thanks for help, > Scott > > > > -----Original Message----- > From: Martin Hirsch [mailto:[EMAIL PROTECTED] > Sent: Thursday, August 17, 2006 9:56 AM > To: flexRadio@flex-radio.biz; Scott Gordon > Subject: Re: [Flexradio] Signal to Noise > > > Scott, > > using the same settings as you , I read 10dB less (S2 and S0.5) than you > on > my signal rx-meter. I calibrated my SDR with professional equipment. > What > soundcard are you using ? > > Martin > > ----- Original Message ----- > From: "Scott Gordon" <[EMAIL PROTECTED]> > To: <FlexRadio@flex-radio.biz> > Sent: Thursday, August 17, 2006 3:40 PM > Subject: Re: [Flexradio] Signal to Noise > > >> Martin, >> >> 1.) My pre-amp is set on low >> 2.) Level Meter reads S3 with -103 dbm (low) S2 -114 dbm (med) S1 >> -121 dbm (High) >> 3.) Selected filter on LSB 2.7K 7.200 hz >> 4.) Calibrated with XG1 >> >> This is into a dummy load or with SDR unhooked. >> >> Thanks >> Scott >> >> -----Original Message----- >> From: Martin Hirsch [mailto:[EMAIL PROTECTED] >> Sent: Thursday, August 17, 2006 8:05 AM >> To: flexRadio@flex-radio.biz; Scott Gordon >> Subject: Re: [Flexradio] Signal to Noise >> >> >> Hello Scott, >> >> the indicated level depends on: >> 1.) preamp setting >> 2.) whether you are reading the Level-Meter or the >> Panadapter-line-level >> 3.) the selected filter >> and of corse if you did the calibration properly. >> Slight diferences may occure on different bands. >> >> My readings with antenna disconnected on 14.250kcs and 500Hz cw are: >> >> >> on RX-Meter: on >> Panadapter: >> >> preamp high: ~ -142dBm ~ >> -153dBm >> med ~ -133dBm > ~ >> - >> 143dBm >> low ~ - 124dBm >> ~ -135dBm >> off ~ - 114dBm >> ~ -125dBm >> >> As you can see I never reach the -104dBm Level. I get 104dBm Meter- >> reading when the preamp is off and the filter is set > 3.3kHz. >> Hope I could help with this. >> >> 73's Martin >> >> >> >> ----- Original Message ----- >> From: "Scott Gordon" <[EMAIL PROTECTED]> >> To: <flexradio@flex-radio.biz> >> Sent: Thursday, August 17, 2006 1:16 PM >> Subject: [Flexradio] Signal to Noise >> >> >>>I am seeing on all bands into a dummy load or without a antenna >>>connect >> >>>to the flex a S3 to S4 noise level or -104dbm. Seems like it should >>>be >> >>>closer to zero unless getting some noise from somewhere else. Can >>>someone try theres and see what your reads. >>> >>> Thanks >>> Scott >>> http://www.kq8rp.us >>> -------------- next part -------------- >>> An HTML attachment was scrubbed... >>> URL: >>> >> /pipermail/flexradio_flex-radio.biz/attachments/20060817/3c519aaa/atta >> ch >> ment.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 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
