In a message dated 11/02/2007, tchannel@.............. writes:

  I received some Mystery noise yesterday  3:20pm and again today at 8:40am.  
This noise is different than the road  construction of a few months ago.
It appears as single spikes, spaced one minute  apart, all the same in 
height. On the helicorer they look like fence posts.  eight the first time and 
eleven today. I drove around the neighbor hood  but did not see anything. Happy to 
email a screenshot, etc to anyone who  might have an idea.



Hi Ted,
 
    Are they all of the same duration and what is it?  How many channels are 
you recording and is it on all of them? This sounds more  like a timing 
problem / poor circuit board contact / psu supply fault / faulty  chip / earth 
contact / loop problem. Check the GPS reception?
 
    Regards,
 
    Chris Chapman






In a message dated 11/02/2007, tchannel@.............. writes:
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  I received some Mystery noise yest=
erday=20
  3:20pm and again today at 8:40am.  This noise is different than the r=
oad=20
  construction of a few months ago.
  
It appears as single spikes, spaced one m=
inute=20
  apart, all the same in height. On the helicorer they look like fence posts=
..=20
  eight the first time and eleven today. I drove around the neighbor ho=
od=20
  but did not see anything. Happy to email a screenshot, etc to anyone=20=
who=20
  might have an idea.

Hi Ted,
 
    Are they all of the same duration and what is i=
t?=20
How many channels are you recording and is it on all of them? This sounds mo=
re=20
like a timing problem / poor circuit board contact / psu supply fault / faul=
ty=20
chip / earth contact / loop problem. Check the GPS reception?
 
    Regards,
 
    Chris Chapman