://www.aircraftspruce.com/catalog/avpages/tednotch.php for an example.
Robert G8RPI.
From: ed breya e...@telight.com
To: time-nuts@febo.com
Sent: Thursday, 5 July 2012, 22:03
Subject: Re: [time-nuts] gps jamming source found
The wireless data links in those R/C sensor
On 7/5/12 10:45 PM, Robert Atkinson wrote:
Hi Ed,
It's not just just cheap and nasy regens that cause this problem. Some
aircraft navigation and communication receivers where found to have enough local
oscillator harmonic leakage at 1575 MHz through the antenna port to jam GPS then tuned
to
It turns out my lacross projection, atomic, external temperature transmitter,
clock is the source of the jamming..
Apparently its trying to communicate with its external temp sensor which has
had a dead battery for months..
The projection clock is powered from ac mains and transmitts for long
Quite interesting the indoor unit that transmits hunting for the outdoor
sensor... usually the indoor unit receives only and the external sensor
transmits only. Your words imply that the LaCrosse clock/sensor is a
transceiver pair...
On Thu, Jul 5, 2012 at 5:21 PM, tom jones epoch_t...@yahoo.com
Thanks for posting this and I'm glad you solved your problem. It's nice to see
actual examples of this type of interference.
--- On Thu, 7/5/12, tom jones epoch_t...@yahoo.com wrote:
From: tom jones epoch_t...@yahoo.com
Subject: [time-nuts] gps jamming source found
To: time-nuts@febo.com
The wireless data links in those R/C sensor type things don't operate
near GPS carriers, but their harmonics can land there. The
transmitted power allowed should be too small to interfere with
anyone's receiver farther away - yours is probably pretty close. I
believe that the remote senders do
A badly tuned/designed super-regenerative receiver can put out a lot of
garbage. For commercial products, the receiver needs FCC approval to
ensure this doesn't happen.
Mike
On 7/5/2012 4:03 PM, ed breya wrote:
The wireless data links in those R/C sensor type things don't operate
near GPS
I believe all electronics needs FCC approval for emissions. [Not my job,
but I know engineers that complain about compliance testing.]
433MHz is a freeband (ISM). Still, you are supposed to be clean.
On 7/5/2012 4:41 PM, Michael Blazer wrote:
A badly tuned/designed super-regenerative
I bought some low power 315 Mhz, 2400 bps transmitter and receiver modules to
use as a GPS data link. It turns out that the transmitter module can jam gps
within a half mile radius. Later, the maker of the modules disavowed all
knowledge of their existence
On 7/5/12 6:33 PM, gary wrote:
I believe all electronics needs FCC approval for emissions. [Not my job,
but I know engineers that complain about compliance testing.]
433MHz is a freeband (ISM). Still, you are supposed to be clean.
433 is NOT an ISM band in the US (or in region 2, for that
stub filter on the
Nav or Comm. see http://www.aircraftspruce.com/catalog/avpages/tednotch.php for
an example.
Robert G8RPI.
From: ed breya e...@telight.com
To: time-nuts@febo.com
Sent: Thursday, 5 July 2012, 22:03
Subject: Re: [time-nuts] gps jamming source
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