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]] 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] 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.
