On Tue,9/1/2015 6:19 AM, Steve London wrote:
An interesting discussion.
There is a common factor in every example cited in this thread -- the
link between sensor and readout is UHF RADIO, and the sensor has no
external wires to act as antennas. If the designer has done a decent job
with layout of the printed circuit board so that it does not contain
antennas, there's nothing to act as an RX antenna for our transmitted
signals, and nothing to act as a TX antenna for noise.
When there is RFI to or from equipment, it is nearly always the improper
termination of the shields of external wiring that radiates trash and
receives RFI. This mechanism was first identified by hams working in pro
audio, and is known as The Pin One Problem.
73, Jim K9YC
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