It does help. Junk from a previous DB could have been getting in the way, but that does not seem to be the issue.
Here are a few things to check or fiddle with. 1.) Look in the Setup->General->Options tab and make sure that the Enable TX Out Delay check box is not checked. 2,) Use the smallest audio buffers that do not distort the audio (Setup->Audio->Primary). I would start with 512. 3.) Use smaller CW RX/TX DSP buffers (Setup->DSP->Options) 4.) Change the CW Blanking Delay value (Setup->Transmit) I am not a CW op so I do not want to venture a guess at what settings to try, but these are the things that you can change which can improve latency. -Tim -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of David Feldman Sent: Sunday, November 21, 2010 2:58 PM To: [email protected] Subject: Re: [FlexEdge] First CW transmit/QSO attempt with > Flex 1500 When I first started 2.0.16, I am pretty sure it created a new database, because I had uninstalled 2.0.5 prior to installing 2.0.16. In any event, I also tried resetting the database and restarting the program, and got the same results (the reset/restart left an XML file on the desktop which I didn't look at.) Hope this is helpful info, Dave > Message: 7 > Date: Sat, 20 Nov 2010 21:28:08 -0500 > From: "Tim (W4TME)" <[email protected]> > To: [email protected] > Subject: Re: [FlexEdge] First CW transmit/QSO attempt with Flex 1500 > and 2.0.16 beta on 1.6 GHz Atom XP box > Message-ID: <[email protected]> > Content-Type: text/plain; charset=windows-1252; format=flowed > > Did you import the database from 2.0.5 into 2.0.16? > > -Tim > --- > W4TME > FlexRadio Systems Internet Systems Admin. > Product Verification Team > Tune In Excitement? > > > On 11/20/2010 6:54 PM, David Feldman wrote: > > This afternoon I had my first QSO with the Flex 1500 > and PowerSDR 2.0.16 using an external keyer. I'm an absolute beginner > with any flexradio product - I bought the rig long ago, received it > when they began shipping, and put it on the shelf (as I'm exclusively > CW op) until 2.0.16 beta was released. So, today is my first on-air > experience with the rig. I was able to upgrade from 2.0.5 > (out-of-the-box CDROM) to 2.0.16 beta without any difficulty. > > > > Where I'm struggling: I notice a pronounced > "hesitation" effect with the first transmit symbol, and also hear a > slightly off-frequency carrier (on another receiver in the shack) > during transmit - a kind of "backwave" but not on the exact TX > frequency. I don't think either of these is news to the developers or > reflector, but I just wanted to see if I should be making any > configuration/operational changes before putting rig back on shelf > awaiting later software version. I did try adjusting CW TX buffer size > between 256 and 2048 and didn't see much difference. I did find it > necessary to run keyer's own sidetone (with "Disable Monitor" selected > on powersdr) as powersdr sidetone is delayed enough vs actual sending, > and powersdr sidetone audio level is dependent on transmit drive level > (which means no powersdr sidetone when tx power turned down to 0 for > testing.) > > > > To work around the first-symbol hesitation, I was able > to complete a QSO by setting the "break in delay" parameter to ~750 > mSec (so basically I could send a whole transmission without the rig > dropping back into receive.) I tried a simple test of sending a string > of dits at modest speed, and adjusted the Delay parameter down to 0 mS > (QSK hoped for) and discovered the shack receiver was not hearing any > useful signal (certainly not a string of dits). Until the delay was > set long enough to keep the rig in transmit between dits, I could not > obtain a workable transmit signal. > > > > The machine is an ATOM 1.6 GHz box with XP and is > doing nothing but running powersdr. CPU utilization seems to be > 50-60%. > > > > I looked at the flexedge archives and 2.0.16 release > notes and didn't see any advice that seems directed at the > first-symbol hesitation which is my main concern. > > > > Thanks for any advice, > > > > 73 Dave WB0GAZ > _______________________________________________ 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.
