Actually, those are sigma delta idle tones in the ADC that go away when you excite the ADC with band noise. They only show up on a dummy load. In fact they will probably go away if you turn up the preamp gain. You will never see them in normal antenna operation.
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.flex-radio.com Tune In Excitement (TM) PowerSDR(TM) is a trademark of FlexRadio Systems On Sun, Jul 4, 2010 at 9:41 PM, [email protected] <[email protected]> wrote: > Hello, > > I am running a new 1500 with PowerSDR v2.0.5 Beta SVN 3783 > > I ran both the filter and level test. > > The level tests all passed however i still see spurs (in the waterfall) > across all bands. See the following image: > > http://moon-bounce.com/satcom/satcom_files/1500_spurs.jpg > > The radio hooked up to a dummy load in this picture and during the > filter/level tests. > > Any idea why I am seeing these spurs? I have several other SDRs running > that don't show spurs like this. > > Also, in the filter test I had tests 4,5,8 and 11 all fail. Not sure if > that is meaningful or what to do about it. > > thanks, > > Joe Steinmetz > k6sat > > > _______________________________________________ > 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 alpha and 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 alpha and beta versions of the software.
