Yes, you are correct and they will go away soon when we make the change to turn it back off. Gerald
Gerald Youngblood, K5SDR President and CEO FlexRadio Systems(TM) 13091 Pond Springs Road, #250 Austin, TX 78729 Phone: 512-535-4713 Ext. 202 Email: [email protected] Web: www.flexradio.com <http://www.flex-radio.com/> Tune In Excitement (TM) PowerSDR(TM) is a trademark of FlexRadio Systems On Sat, Nov 13, 2010 at 10:07 AM, Al <[email protected]> wrote: > Clay, > I think the Spur you see on 6 meter when in the AM mode are the result of > the fact that the current versions of PSDR keep the TX active during receive > to enhance CW turnaround time.. In CW/SSB the Carrier is uppresed until > modulation is applied and you see no spurs.. In AM/FM the carrier is always > on and you see the spurs on 6 Mtrs( maybe 10).. On the lower HF bands there > is enough natural isolation so that the spurs are not visable. > > Al, K0VM > > > > > On 11/13/2010 9:22 AM, Clay W7CE wrote: > >> Thanks for the info Gerald. I'm still confused why a mode change would >> affect the spurs as seen on the panadapter. Aren't mode changes handled >> completely in software? I'm not having a problem with CW or USB/LSB spurs. >> But when I switch to AM or FM, new spurs show up on the panadapter, many of >> which are now in the wider passband. >> >> 73, >> Clay W7CE >> >> >> On 11/12/2010 6:15 AM, Gerald Youngblood wrote: >> >>> Tim is correct about the cause. This is being addressed as part of the >>> CW iteration. >>> >>> Gerald >>> >>> >>> Gerald Youngblood, K5SDR >>> President and CEO >>> FlexRadio Systems(TM) >>> 13091 Pond Springs Road, #250 >>> Austin, TX 78729 >>> Phone: 512-535-4713 Ext. 202 >>> Email: [email protected] <mailto:[email protected]> >>> Web: www.flexradio.com <http://www.flex-radio.com/> >>> >>> >>> Tune In Excitement (TM) >>> >>> PowerSDR(TM) is a trademark of FlexRadio Systems >>> >>> >>> On Fri, Nov 12, 2010 at 7:27 AM, Tim Ellison <[email protected]<mailto: >>> [email protected]>> wrote: >>> >>> I believe that on the 3000, the QSE is left on during RX to >>> improve RX/TX/RX switching performance and it is leaking into the >>> QSD. If this is the case, it is a known problem and I believe it >>> is one of the things that will be addressed when the CW is revamped. >>> >>> >>> -Tim >>> >>> >>> -----Original Message----- >>> From: [email protected] >>> <mailto:[email protected]> >>> [mailto:[email protected] >>> <mailto:[email protected]>] On Behalf Of Clay W7CE >>> Sent: Friday, November 12, 2010 2:41 AM >>> To: Flexedge >>> Subject: [FlexEdge] Flex 3000 Spurs on AM >>> >>> I had hoped that 2.0.16 would fix this problem, but it looks >>> unchanged. >>> If I tune to 50.400 MHz (the local 6M AM frequency) and select AM >>> mode with a 6.6 kHz BW, there are 4 spurs in the AM passband with >>> the strongest at -100 dBm (S 4.5). If I turn SR on, the spurs >>> move and decrease in amplitude, but there are still 4 spurs with >>> the strongest at >>> -114 dBm (S2+). If I select USB, LSB, DSB, CWL or CWU the spurs >>> disappear from the panadapter. I don't know if this happens on >>> the lower frequencies, but it makes AM unusable on 6M. I just checked >>> 50.300 on FM and the same issue exists. The spurs will be >>> stronger than many FM simplex stations on that frequency. >>> >>> Why does changing mode cause a change in the spurs? I wouldn't >>> expect the DDS to be reprogrammed when the mode changes. >>> >>> Is this a known problem that will eventually be fixed? BTW, I've >>> never seen this on my 5000A. >>> >>> 73, >>> Clay W7CE >>> >>> _______________________________________________ >>> Flexedge mailing list >>> [email protected] <mailto:[email protected]> >>> >>> http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz >>> This is the FlexRadio Systems e-mail Reflector called FlexEdge. >>> It is used for posting topics related to SDR software development >>> and experimentalist who are using beta versions of the software. >>> >>> _______________________________________________ >>> Flexedge mailing list >>> [email protected] <mailto:[email protected]> >>> >>> http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz >>> This is the FlexRadio Systems e-mail Reflector called FlexEdge. >>> It is used for posting topics related to SDR software development >>> and experimentalist who are using beta versions of the software. >>> >>> >>> >> _______________________________________________ >> Flexedge mailing list >> [email protected] >> http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz >> This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is >> used for posting topics related to SDR software development and >> experimentalist who are using beta versions of the software. >> >> > > _______________________________________________ > Flexedge mailing list > [email protected] > http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz > This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used > for posting topics related to SDR software development and experimentalist > who are using beta versions of the software. > _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software development and experimentalist who are using beta versions of the software.
