NINE MINUTES? Weird. Do me a favor please. REMEMBER YOU DID THIS SO YOU CAN GO BACK.
You high precision folks are always finding the smallest glitches. Click on setup and on the general tab, hardware, click the expert box on the right hand side and change the DDS offset from 9000 to 0. Hit enter in the box. See if the glitch goes away. After you're done, set the DDS offset back for best receiver dynamic range, etc. performance. Bob On Sat, Dec 17, 2011 at 11:53 AM, Bill Dailey <[email protected]> wrote: > BY the way.. it was right on time 9 minutes... also I have tried to listen > for the anomoly but cant hear it (although it is a very small shift) was > hoping for a click or something. > > The 5000 is plenty stable for phone without and external reference but for > what I am doing it is a few orders of magnitude less stable. It has been > on for days and the room is at a constant temperature (+/- 1-2 degrees) > > On Sat, Dec 17, 2011 at 10:44 AM, Bill Dailey <[email protected]> wrote: > > > Good point.. i have done that before: > > http://img94.imageshack.us/img94/2592/spikes2.jpg > > > > spike is still there although less noticeable. > > > > > > On Sat, Dec 17, 2011 at 10:22 AM, George Allen < > [email protected]>wrote: > > > >> Suggest that you remove the external clock input to the F5K, use the > >> internal reference and see if you still have the problem. Obviously, > you > >> will be off by a different amount; but, with a warm F5K, the frequency > >> should be stable. > >> > >> George > >> K2CM > >> > >> ________________________________________ > >> From: [email protected] [[email protected]] > >> on behalf of Bill Dailey [[email protected]] > >> Sent: Saturday, December 17, 2011 11:11 AM > >> To: Jerry Flanders > >> Cc: Flex Edge > >> Subject: Re: [FlexEdge] Odd happenings every 9 minutes > >> > >> By the way... this glitch is nearly instantaneous... it look like it > >> happens for several seconds just because the FFT is responding to the > >> large > >> jump... it is likely more than 50mhz.. that is just how the FFT smooths > >> it. I would presume there is something odd going on with image > rejection > >> or something. > >> > >> On Sat, Dec 17, 2011 at 9:57 AM, Jerry Flanders <[email protected] > >> >wrote: > >> > >> > Might this result from the satellites coming in/out of view and the > >> GPSDO > >> > switching among them? Maybe try it without the GPSDO. > >> > > >> > I am surprised you are within 100 microHz on your measurement - my > 5000a > >> > synthesizer seems to _always_ be 20 -60mHz off. > >> > > >> > Jerry W4UK > >> > > >> > > >> > At 10:40 AM 12/17/2011, Bill Dailey wrote: > >> > > >> >> I don't know who to contact on this so I will put it here and leave > it > >> up > >> >> for grabs. I have been dealing with this and trying to trouble shoot > >> it > >> >> for a couple of months. Fairly complex setup: > >> >> > >> >> Flex-5000a PowerSDR version 2.2.3 (I havent checked other versions), > >> >> windows 7, i7 speed demon computer > >> >> IF offset 0 hz, dds offset 0 > >> >> Stanford Research DS345 Signal generator > >> >> Both disciplined to a Jackson Labs Fury GPSDO 10Mhz reference > >> >> Sending audio via VAC - all sample rates verified to 48khz > >> >> I am sending audio to fldigi (have verified with spectrum lab also, > >> >> identical results) > >> >> > >> >> Excellent frequency resolution.. right on where I would expect > (within > >> >> about 0.1mhz) ...BUT..... > >> >> > >> >> Every 9 minutes there is some odd abberancy that occurs with either > >> >> powerSDR (probably), the radio or VAC that shifts the measurement by > >> +50 > >> >> mhz. image of graph: http://img703.imageshack.us/** > >> >> img703/9382/spikesbf.jpg< > >> http://img703.imageshack.us/img703/9382/spikesbf.jpg> > >> >> I have tried various buffers and cant seem to affect the timing or > the > >> >> magnitude of the shift. I used to get noise that would surge like > this > >> >> with past powersdr versions so I am virtually certain this is a > >> software > >> >> issue. > >> >> > >> >> Anyone have any suggestions of what may be causing this behavior? > >> >> > >> >> Doc > >> >> KX0O > >> >> > >> > > >> > > >> > >> > >> -- > >> Doc > >> > >> Bill Dailey > >> KXØO > >> _______________________________________________ > >> 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. > >> > > > > > > > > -- > > Doc > > > > Bill Dailey > > KXØO > > > > > > > > > > > > > > > -- > Doc > > Bill Dailey > KXØO > _______________________________________________ > 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.
