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UCSD-E4E / smartfin-pcba

Smartfin PCB
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Replace CAM-M8Q with CAM-M8C? #12

Closed ntlhui closed 1 year ago

ntlhui commented 2 years ago

Current BOM uses CAM-M8Q. Available alternative is CAM-M8C, which uses a crystal as opposed to a TCXO.

From the datasheet:

The CAM-M8Q concurrent GNSS module uses a TCXO oscillator.The TCXO option allows accelerated weak signal acquisition, enabling faster start and reacquisition times. The CAM-M8C concurrent GNSS module uses a crystal-based oscillator. This makes the CAM-M8C a more cost efficient solution. Oscillators used on CAM-M8 series modules are carefully selected and screened for stability and against frequency perturbations across the full operating range (–40 °C to +85 °C).

ntlhui commented 2 years ago

Test plan: obtain a set of CAM-M8C and install on a Rev C00 board. Compare side-by-side with CAM-M8Q on Rev C00 board.

Evaluate the following:

  1. Cold boot lock time
  2. Location stability
  3. Cold boot lock time in water
ntlhui commented 1 year ago

wontfix due to E Series obsolescence