[time-nuts] Si5351A

Joseph Gray jgray at zianet.com
Tue Nov 11 15:49:53 EST 2014

Some of you have probably already heard of this new clock generator chip
from Si. News of a board with this chip from Adafruit just came up on a
local Amateur list today. A quick Google shows that some folks have used
this chip in homebrew SSB rigs.

My concern would be that when this chip generated frequencies that required
non-integer PLL ratios, that the jitter would be unacceptable for SSB use,
and even worse for CW.

As for the Adafruit board, they are using a crystal spec'ed for 30ppm
accuracy and stability. Not something I'd want to use in a radio. Perhaps
the "C" version of the chip, fed by a TCXO.

What do you think about the jitter issue?

Joe Gray

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