[TangerineSDR] Notes from PSWS / TangerineSDR call

[Tom McDermott]

Notes from PSWS / TangerineSDR call of 05-24-2021

1. John and Scotty located a replacement TCXO for the clock module and they
are on order (the previous unit was not available for production). Scotty
received the 7-port Ethernet chip. The USB3 (mid August delivery) and FPGA
(date not yet committed) are the only components not yet promised.

2. Discussion on power supply bypassing for low conducted noise. Scotty
will send Tom part numbers of the output bypass caps he is planning for the
+12v to +5v switcher.

3. Discussion on PPS during holdover. John recommends having the FPGA
generate PPS from the synthesizer and update/synchronize that against GPS
PPS when GPS in-lock, and holdover when GPS out-of-lock. The new TCXO has
good holdover performance ( +/- 40 ppb over 24 hours at constant
temperature).

-- Tom, N5EG
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