If microwave ovens could be an issue, could current popular mobile phone/tablet
(Qualcomm Snapdragon, Samsung Exynos, Apple A7/M7) and low power desktop (Intel
Core) processors running at nominal 1.4GHz also be an issue?
On 2015-12-05 09:06, Tom Van Baak wrote:
Jim,
Check IF level and H2 pressure. Also see if OCXO tuning is near a rail. Go back
through the past month and look at trends on all the parameters. You are
logging all channel data, I hope.
Also check your microwave ovens: http://arxiv.org/pdf/1504.02165v1.pdf ;-)
Less technical links:
http://www.nature.com/news/microwave-oven-blamed-for-radio-telescope-signals-1.17510
http://www.skyandtelescope.com/astronomy-news/microwave-ovens-spark-radio-signals-peryton-05122015/
http://phenomena.nationalgeographic.com/2015/04/10/rogue-microwave-ovens-are-the-culprits-behind-mysterious-radio-signals/
/tvb
Has anyone here who is familiar with hydrogen masers ever experienced a
sudden jump in phase of the 5MHz output?
We have found they occur semi-regularly (few times a week) and are trying
to find a culprit.
The weird thing is that the jump is ~0.7ns and that 1/0.7E-9 is close-ish
to 1420.4MHz which is the hydrogen line. Too much of a coincidence for me.
These seem to be appearing at three different locations with the same model
of maser at each location. I won't mention the model publicly.
We're still investigating various potential causes (e.g. power spikes,
cables being moved), but this 0.7ns figure is niggling me.
Has anyone here ever seen such a thing before?
Jim
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--
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
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