PSN-L Email List Message

Subject: Re: GPS RECEIVER
From: michaeld mike.wizard@.........
Date: Mon, 1 Nov 2010 11:25:25 -0700


The active TV antennas mounted on boat masts were a major contributor to on=
e
case of GPS interference.
Michael

On Mon, Nov 1, 2010 at 10:07 AM, Jack Ivey  wrote:

> You're sure it's RF and not something else?
>
> There was an infamous case in Monterey Bay that disabled GPS
> on-and-off for months.  Turned out to be that bane of the
> radio amateur, a faulty TV amplifier in someone's
> attic.  You might want to check your own house, although
> it could also be a neighbor.
>
>
> -----Original Message-----
> From: psnlist-request@.............. [mailto:
> psnlist-request@............... On Behalf Of jonfr@.........
> Sent: Monday, November 01, 2010 12:44 PM
> To: psnlist@..............
> Subject: Re: GPS RECEIVER
>
> Hi,
>
> I have never had a GPS signal jammed because of some other transmitters
> that are being used close to my GPS antenna.
>
> Regards,
> J=F3n Fr=EDmann.
>
> > Hello PSN:
> >
> > Many of you have this gps receiver to get good times on your graphs
> > and over time you should learn any problems.
> >
> > I have found one Which I do not know how to beat.
> >
> > There seems to be RFI related problems
> > where the in the presence of a high energy RF field
> > of some frequency the GPS signal or A/D board is being
> > jammed and the lock is lost and an alarm will sound.
> >
> > This problem is not the fault of of the device
> > but simply related to the fact the unwanted RF signal
> > has penetrated the electronics.
> >
> > Can anyone tell me if they have successfully won
> > the battle of when like a police car or fire truck
> > or other government car is outside in the neighborhood with a 25 watt
> > transmitter maybe 100ft away and using their radio ?
> >
> > It wipes out my data and everything for a minute or so.
> >
> > This mostly happens in the winter when the city
> > here grows three times its normal population.
> >
> > Comments ?
> >
> > geoff
> >
> > or, grumbly in Arizona.
> >
> >
> > __________________________________________________________
> >
> > 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.
> >
>
>
> __________________________________________________________
>
> 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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> __________________________________________________________
>
> Public Seismic Network Mailing List (PSNLIST)
>
> To leave this list email PSNLIST-REQUEST@.............. with
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>
The active TV antennas mounted on boat masts were a major contributor to on=
e case of GPS interference.
Michael

On= Mon, Nov 1, 2010 at 10:07 AM, Jack Ivey <ivey@..........> wrote:
You're sure i= t's RF and not something else?

There was an infamous case in Monterey Bay that disabled GPS
on-and-off for months. =A0Turned out to be that bane of the
radio amateur, a faulty TV amplifier in someone's
attic. =A0You might want to check your own house, although
it could also be a neighbor.


-----Original Message-----
From: psnlist-request@web= tronics.com [mailto:p= snlist-request@..............] On Behalf Of jonfr@.........
Sent: Monday, November 01, 2010 12:44 PM
To: psnlist@.............. Subject: Re: GPS RECEIVER

Hi,

I have never had a GPS signal jammed because of some other transmitters
that are being used close to my GPS antenna.

Regards,
J=F3n Fr=EDmann.

> Hello PSN:
>
> Many of you have this gps receiver to get good times on your graphs > and over time you should learn any problems.
>
> I have found one Which I do not know how to beat.
>
> There seems to be RFI related problems
> where the in the presence of a high energy RF field
> of some frequency the GPS signal or A/D board is being
> jammed and the lock is lost and an alarm will sound.
>
> This problem is not the fault of of the device
> but simply related to the fact the unwanted RF signal
> has penetrated the electronics.
>
> Can anyone tell me if they have successfully won
> the battle of when like a police car or fire truck
> or other government car is outside in the neighborhood with a 25 watt<= br> > transmitter maybe 100ft away and using their radio ?
>
> It wipes out my data and everything for a minute or so.
>
> This mostly happens in the winter when the city
> here grows three times its normal population.
>
> Comments ?
>
> geoff
>
> or, grumbly in Arizona.
>
>
> __________________________________________________________
>
> 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.
>


__________________________________________________________

Public Seismic Network Mailing List (PSNLIST)

To leave this list email = PSNLIST-REQUEST@.............. with
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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
See h= ttp://www.seismicnet.com/maillist.html for more information.


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