Thanks to all who responded.   Larry and Steve,  I have been trying to save
and decipher the WinXP log but never considered the WinSDR log.  Sure
enough, there it was, "Loss of signal from A/D board".  That was interestin=
g
since in the past I've disconnected the cable as a test and it did not caus=
e
the disappearing trace phenomena.

I thought it probably was not a complete loss of signal, maybe intermittent
or weak signal since I've checked all the connections numerous times.  Earl=
y
last night  I connected one of those "active USB repeater" cables to the en=
d
of the existing USB cable, making the overall cable even longer, and knock
on wood, it's been running perfectly ever since.  Not sure how the repeater
cable works, maybe takes some current from the USB power conductor to power
an amplifier circuit for the data conductor.

I won't mention how long I've been struggling with this issue, too stubborn
to ask for help, and within hours of asking, I get the solution.  Thanks
again to all.

Bob



On Tue, Sep 13, 2011 at 9:24 AM,  wrote:

> Hi,
>
> I have never seen this type of issue. But I use wirless all the time clos=
e
> to my geophone. I use serial cable, not usb however.
>
> Regards,
> J=F3n Fr=EDmann.
>
>
> > I have had some trouble keeping my WinSDR up and running.  It frequentl=
y
> > shows just a blank screen, with all helicord traces gone.  Just as if I=
'd
> > just opened the software without a seismometer connected to the compute=
r.
> > The computer is an older Dell with a 2 GHz processor and 512 Mb RAM,
> > running
> > WinXP with I think service pack 3.
> >
> > What is interesting about this phenomenon is that there is a wireless
> > router
> > in the house (the seismo server has no wireless capability and is not
> > connected to the network) and WinSDR will work fine until someone sits
> > down
> > at another computer and the wireless network starts exchanging traffic.
> > Then the WinSDR screen loses the displayed data and goes blank.
> >
> > Is it possible that somehow the USB cable from the seismometer to the
> > seismo
> > server computer  is acting as an antenna and picking up enough
> > interference
> > from the 2++GHz wireless LAN system to crash WinSDR?  WinSDR does not
> > actually crash, it just loses the data traces, which disappear.  My nex=
t
> > step is to dig out some old books and see if I can figure out what leng=
th
> > the seismo cable would have to be to resonate at the wireless LAN
> > frequency.   But I think it would have to be very short?
> >
> > This is another unexpected educational aspect of this hobby!   Just
> > wondering if anyone else has experienced this issue?
> >
> > Thanks,
> >
> > Bob
> >
>
>
> __________________________________________________________
>
> Public Seismic Network Mailing List (PSNLIST)
>
> To leave this list email PSNLIST-REQUEST@.............. with
> the body of the message (first line only): unsubscribe
> See http://www.seismicnet.com/maillist.html for more information.
>
Thanks to all who responded.=A0=A0 Larry and Steve,=A0 I have been trying t=
o save and decipher the WinXP log but never considered the WinSDR log.=A0 S=
ure enough, there it was, "Loss of signal from A/D board".=A0 Tha=
t was interesting since in the past I've disconnected the cable as a te=
st and it did not cause the disappearing trace phenomena.


I thought it probably was not a complete loss of signal, maybe intermit=
tent or weak signal since I've checked all the connections numerous tim=
es.=A0 Early last night=A0 I connected one of those "active USB repeat=
er" cables to the end of the existing USB cable, making the overall ca=
ble even longer, and knock on wood, it's been running perfectly ever si=
nce.=A0 Not sure how the repeater cable works, maybe takes some current fro=
m the USB power conductor to power an amplifier circuit for the data conduc=
tor. 


I won't mention how long I've been struggling with this issue, =
too stubborn to ask for help, and within hours of asking, I get the solutio=
n.=A0 Thanks again to all.

Bob




On Tue, Sep 13, 2011 at 9:24 AM,  <jonfr@.........> wrote:

Hi,



I have never seen this type of issue. But I use wirless all the time close<=
br>
to my geophone. I use serial cable, not usb however.



Regards,

J=F3n Fr=EDmann.





> I have had some trouble keeping my WinSDR up and running. =A0It freque=
ntly

> shows just a blank screen, with all helicord traces gone. =A0Just as i=
f I'd

> just opened the software without a seismometer connected to the comput=
er.

> The computer is an older Dell with a 2 GHz processor and 512 Mb RAM,
> running

> WinXP with I think service pack 3.

>

> What is interesting about this phenomenon is that there is a wireless<=
br>
> router

> in the house (the seismo server has no wireless capability and is not<=
br>
> connected to the network) and WinSDR will work fine until someone sits=


> down

> at another computer and the wireless network starts exchanging traffic=
..

> Then the WinSDR screen loses the displayed data and goes blank.

>

> Is it possible that somehow the USB cable from the seismometer to the<=
br>
> seismo

> server computer =A0is acting as an antenna and picking up enough

> interference

> from the 2++GHz wireless LAN system to crash WinSDR? =A0WinSDR does no=
t

> actually crash, it just loses the data traces, which disappear. =A0My =
next

> step is to dig out some old books and see if I can figure out what len=
gth

> the seismo cable would have to be to resonate at the wireless LAN

> frequency. =A0 But I think it would have to be very short?

>

> This is another unexpected educational aspect of this hobby! =A0 Just<=
br>
> wondering if anyone else has experienced this issue?

>

> Thanks,

>

> Bob

>





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Public Seismic Network Mailing List (PSNLIST)



To leave this list email =
PSNLIST-REQUEST@.............. with

the body of the message (first line only): unsubscribe

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ttp://www.seismicnet.com/maillist.html for more information.