Are the HFT guys (the High Frequency traders on Wall Street, you know,
'quants' et al)
still testing on the HF bands, with the intent to use that medium to execute
trades with
less than the delays seen on the fiber circuit from Chicago to New York (and
elsewhere)?
de AA5CT
.
.
On Wednesday, December 18, 2019, 2:12:45 PM CST, MICHAEL ST ANGELO
<mstangelo@comcast.net> wrote:
I was considering allies in this fight. I thought of Elon Musk but he has
written off AM as an entertainment medium.
He has phased out AM radios in this cars:
<https://www.wsj.com/articles/your-tesla-can-go-zero-to-60-in-2-5-seconds-but-cant-get-am-radio-1541523098>
HF communications is primarily used by Hams. There is still some aeronautical
mobile and I haven't heard maritime mobile recently so I don't believe they
will lobby for tighter rules. In addition, they operate over water, not land,
so interference is not an issue, except from their own systems.
The Digital TV and FM bands are higher power line of sight modes and the
modulation schemes are less susceptible to noise.
Next is the VHF aeronautical band. It is still AM and the administrators are
sensitive to interference when it affects them will. If they complain we will
get some action.
Mike N2MS
> "Since these RFI issues from Solar seem to long and drawn out
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