I had a freeze when I started some DOS programs. I increased the priority
in powerSDR to "above normal" and all is well since I did that.
Carl Moreschi N4PY
121 Little Bell Drive
Bell Mountain
Hays, NC 28635
www.n4py.com
----- Original Message -----
From: "Stu Phillips" <s...@ridgelift.com>
To: <flexradio@flex-radio.biz>
Sent: Thursday, July 02, 2009 8:33 PM
Subject: [Flexradio] PowerSDR "freeze" and AM Broadcast spurii on 40m
withFlex-5000?
I took delivery of my Flex 5000 a couple of days ago - everything is
working fine except for...
- Periodic hangs where PowerSDR "freezes" and the audio output
stops. Pressing Stop then start on PowerSDR gets everything going
again. I've run the latency checker and the max its seen was 900us -
this on a Duo Quad Core at 2.33 GHZ, Vista X64. The machine is
dedicated to the radio. I'm still trouble shooting this one following
the suggestions in the KB (disabling virus checker etc.). The system
runs fine for hours and then hangs - odd. Typical CPU utilization is <
15%.
- I have a set of spurii on 40m from local broadcast stations
on the AM band. For example, AM860 is perfectly decodable on 7.0039,
AM910 at 7.0539, AM1010 at 7.1539... the frequency spacing on the AM
band is reflected on the spurii. This goes above and below the 40 band.
I have dual RX in the Flex - RX2 is fed via its RX2 input from my home
built K9AY loop which has a very effective hi pass filter with an almost
brick wall response at 1.7 MHz. When using RX2 input from the K9AY
there are no spurii on RX2 - using RX1 is fed from an R5 vertical, 160m
inverted L, G5RV and a 30m vertical dipole.
Checking the two receivers via the antenna selection panel shows the
following.
RX1 - Spurii on Inverted L (strongest), Vertical Dipole and G5RV
- none on the R5
RX2 - Spurii same as RX1 when fed via RX1 tap (not a surprise),
none on the R5 and NONE on the K9AY
Since some of the antennae are clear, it pretty much eliminates the BCI
getting in via other cables (audio, 10 MHz GPSDO reference), etc.
Have others seen this? I saw some reference on the mailer archive of
this being a side effect of the single conversion of the FLEX so I
suspect this isn't new news.
I'm thinking of a BCI filter (same design as in my K9AY) in the RX1
receive loop - any suggestions/pointers to either of these issues
gratefully received!
Thanks!
Stu N6TTO
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