It is more likely your Firewire card or the actual cable at the connection ends. I can't tell if you have laptop or a desktop. If this is a desktop, I would open it up and re-seat the card and/or move it to another slot.
Another item to check (in either type of PC) would be for any conflicts with the Firewire card in Device Manager under the View Menu/Resources by connection/Interrupts(IRQ).
I have also found on some cards that the cable can be connected but not pushed in completely which would cause the intermittent issues you are having.
Lastly, check that the power supply if it is a desktop to ensure that none of the bus voltages are low.
Just my 2 cents...the value may vary.
Thank you all for your awesome, fast responses. I have subsequently re-seated the Firewire card into a different slot within my desktop computer, connected everything back up and am now listening trouble free as I type. The CPU load is averaging 8%. It's a bit too early to tell, but I think the fact my Flex has been working okay for about 30 minutes is a good sign. Last night it wouldn't last 5 minutes.
For your information I am using a Fujitsu Esprimo PH300 mini tower computer. Specifications are as follows: Intel® CoreTM i7-2600 processor (4 Cores / 8 Threads, 3.40 GHz, 8 MB, Intel® HD Graphics 2000)
I have owned it for about 2,5 years but think it should still be fast enough to run my SDR. I don't run many other apps at the same time, so there isn't much else to slow it down.
Thanks again for your valuable assistance. If it fails again, I will look into the device manager for any IRQ conflicts etc and take it from there. Either way I shall keep you posted.
Have a great weekend, Regards Kevin (ZS6KAT)
:-( I'm afraid after just 35 minutes the problem resurfaced - intermittently to start with and eventually almost all the time. What a shame... It starts off with a buzzing noise just like electrical interference, increasing in intensity until the audio sounds quite garbled. Eventually Power SDR crashes. I wonder if the problem isn't temperature related perhaps?
I have just tried reloading the factory settings again, but unfortunately no luck. I'm now going to follow the rest of your suggestions and see what happens.
Will keep you posted... Regards Kev
Hi Tim, Thank you for your advice. The last time Power SDR crashed I switched off my Flex 3000 and performed a complete reboot of my computer. 10 seconds after loading Power SDR and starting my Flex 3000 the problem was there. Within 20 seconds Power SDR had crashed again. CPU loading was 24% - up from 8%. I quickly reloaded Power SDR (not the PC) and since then the problem has been coming and going by itself. I have not experienced another crash though. I cannot recall loading any new programs recently but do you think I might be able to see what is happening if I look at the Windows Task Manager? Maybe there is a process that is interfering with the Firewire communications. I followed Jon's advice earlier but could not see any conflicts. By the way, I have recorded the distorted audio using Power SDR. I have also taken some screen shots of the various waveforms and error messages. Is there any way I can email them through to the group? I'm not sure whether it is possible or not.
Hi Bill, thank you for your advice too. I will have to find a fellow ham or colleague at work who also has a Firewire card installed on his computer with a view to seeing if the problem still appears or not.. Unfortunately my card does not appear on the list you recommended - neither good nor bad news. I'll let you know what I find out. Thanks again.
FYI - 45 minutes and the distortion is still coming and going by itself. No more crashes though...
Sounds like DPC issues still...have you tried shutting down you antivirus/anti malware programs to test? Are you using some form of online or offline back-up that is automatic like Mozy, Acronis or something else?
Try going into MSCONFIG and turning off the majority of start-up (all if you can) and then restart, accept the change and see what happens. If the system is then problem free you can work on determining what item in Start-up might be causing the problem.
For anyone who has been following this post, over the past couple of days I have slowly managed to completely get rid of the distorted audio by removing all unwanted software from my computer - especially the stuff that repeatedly searches for new updates over the Internet. I also removed everything possible from MSCONFIG - Start-up. No use in having programs running in the background and taking up unnecessary CPU time..
The only issue I have now is that sometimes Power SDR crashes out of the blue. For the most part, this is only during transmit and not during receive. RF feedback perhaps? Your comments would be much appreciated please.
Thank you for all your advice thus far - I would never have been able to manage without it.
73's Kevin ZS6KAT
I had the exact same issue you are describing and spent ages trying this and trying that and in the end I changed the FW card and cable to completely eliminate them.
That was better but not cured - in the end I sent the Flex 3K to FRS for service and they replaced the FW IO chip and all was well.
The FW IO probably died at some time and all the unplugging and plugging in probably killed it with ESD. There is a warning to have everything off when plugging in that lead to avoid ESD issues.
Mine was 3 weeks old brought second hard - but about 12months old from new so it was not an expensive repair. My clue was that it came and went from the device manager with the Windows "ping pong" PSDR would stop or hang and then it would appear back moments later.
Performed perfect after FRS serviced it.
Hope that helps.