[RFI] heterodyne on 17 meters
kd7jyk at earthlink.net
Tue Jul 16 02:56:54 EDT 2013
: discovered that the switching power supply in my Rigol spectrum analyzer
: radiates trash that is picked up by a loop near the unit.
I was called out East of Fallon NAS to track down some possible RF/magnetic
anomolies. This was after having my watch overhauled after several years of
not wearing it and switching from an analog cassette recorder to a DVR.
My watch was on my left wrist, same hand I hold equipment in, DVR was off,
but clock and various soft-start circuits running, kept in left shirt
The watch produces a high pitched whine and 1 pps pop, the DVR broadband
hash and whistles from LF to upper HF, even worse when on, forget about
audio documentation with that. This drove me batty for a good five minutes
until I put two and two together. I eventually put them in the truck and
parked it several hundred feet from where I was sniffing.
More information about the RFI