F5K IF Spurs ??
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F5K IF Spurs ?? Expand / Collapse
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Posted Thursday, May 29, 2008 2:34 PM
Supreme Being

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Last Login: Thursday, October 25, 2012 10:13 AM
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(Flex5000a, trunk SVN, WinXP sp3, sample rate 48k)

on several bands with low noise levels, (i.e. 6 m ) I can see some spurs on the panadapter that never move as the receiver frequency is changed.. In addition to the zero hz hump (9 khz below dial frequency), at 50.125 on SSB/Digi I see a small spur at 40 hz above the dial freq. In AM or FMN I see larger spurs at +-1 khz , +3 khz, +5 khz and +7kz reference the dial frequency. If SR is off, these spurs are fixed on the panadapter as the dial frequency is changed.

Why would spurs come and go as you toggled between SBB and AM ??

Is it just my radio ??

AL, K0VM


AL, K0VM
SDR-1000, Flex5000, Flex user since 2006
Post #847
Posted Thursday, September 25, 2008 5:24 AM
Junior Member

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Al, I just recently had spurs on my F5K as well that acted just like yours. I found out by turning the volume way up on the computer and equalizer I could hear a radio station in there. I had to move the bandwidth up and down and set to AM mode to find it out.

My fix was to reset the database and restart SDR.

Hope this works for you

73

Floyd/WD8DUP
German: DA1VF


Floyd, WD8DUP
German: DA1VF
Post #1290
Posted Thursday, September 25, 2008 5:26 AM
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Should have read my reply a little better .....

The spurs turned out to be real signals. It seems that my receiver was stuck on one frequency and wouldn't change; hence, the signals staying were they were.

Floyd


Floyd, WD8DUP
German: DA1VF
Post #1291
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