[time-nuts] Near-perfect chip for Loran-C frequency receiver
bruce.griffiths at xtra.co.nz
Thu Jul 3 19:25:10 EDT 2008
Hal Murray wrote:
>> At least where I am the 60 kHz signal from WWVB is quite weak. The
>> need is for as narrow an RF band width as possible for 60 kHz ...
> What is the bandwidth of WWVB and similar services?
WWVB uses AM to encode pulses of 200, 500 and 800 millisec duration.
Thus the bandwidth only has to be sufficient to allow the various pulse
widths to be distinguished.
Somewhere in the vicinity of 10Hz or so should suffice.
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