Hello All As I started all of this with what I thought was a simple observation I thought I should send a follow up. First let me say that I am using a dual boot system as this is how I have switched in the past from one operating system to another. In this case it is from Win XP Pro w/service pack 3 to Win 7 64 bit. I did this primarily because a video editing program that I use. Not because I was getting poor performance from the F3K and Win XP.
So now, down to the drivers. When I went into the device control drivers I found 3 possible drivers. 1394 OHCI Compliant Host Controller 1394 OHCI Compliant Host Controller (Legacy) LSI 1394 OHCI Compliant Host Controller I tried all 3 and immediately ruled out the LSI driver. By the way I rebooted after each change. >From what I can tell (on my setup - not yours) there is little difference >between the other two. At first what I did was to leave everything the same and try both drivers. Nothing seemed to change. I let each driver have about 1/2 hour of digital (25 watts) operation with the Flex Radio DPC latency checker running. At the end of the test period drivers were in the 6-700 range. At this time I should mention that the audio did not seem to be distorted to me with either driver. Also please not the the following software was active. PowerSDR 2.0, Ham Radio Deluxe, DM780 for digital, Logbook and for good measure I checked my e-mail (internet access - simulate QRZ lookup) twice with each driver. I was trying to have all kinds of stuff going on. Also please note that the CPU usage at time it 25%. There was one unexpected occurrence. When I went from 25 to 35 Watts I got enough RF feedback to lock up PowerSDR. - This had never happened before. Weird I thought. So I rebooted and went back to Win XP. Tried 50 watts and no problem........and this was just within a few minutes - I mean how long does it take to reboot? So I started checking around and found that I had changed the buffer size between XP and Win 7..... Oh no .... dummy dummy dummy! Don't ask me why the buffer would matter but it seems to have - and just for clarification it was the under the DSP -Options - CW TX buffer. I had had it at 2048 and changed it to 256 like I had in Win XP. Now it works!! I don't know don't ask me, it just does. This all started because I noticed a difference between Win XP and Win 7 in latency and cpu usage. Were either really really bad - no not really. I mean come on - only 25% cpu usage - that means I have 75% left. With 6-700 latency - hey access to a HD can rung 4 or 5 times as much. If it works - then it works..... By the way I am using the legacy driver because it was recommended by people who know more than I do. So how did you spend your evening....... 73's Don kd6hq For those who might want to know: Computer : clone CPU: Quad core running at 2.83G. 8 GB Ram 6 Hard drives for a total of 2 TB. Asus P5K motherboard NVIDIA GeForce 8600 GTS Video Card 2 Monitors Wireless keyboard and mouse Griffin PowerMate _______________________________________________ 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.
