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Smoothed power supply DC-DC for GPS receiver


Richard Pearce

I have a GPS receiver board (Hemisphere P200) which I wish to use for a PTP time server.  The board requires 2 x 3.3v input and 1x 15v input for the antenna. The board will be mounted inside a computer and powered from its power supply. This will provide a 12v power from which I intend to power the board and antenna. I was planning to use two DC-DC converters (TRACOPOWER TEC 3-1210WI, TEC 3-1213WI) to get from the 12v to the 3.3v and the 15v. My question revolves around how to connect the grounds. Do I just attach everything to a common ground or does the 3.3v GND need to go back through the 3.3v DC-DC converter for it to work? Ditto for the 15v. What is the best practice for instruments? The antenna obviously works with RF what considerations does this involve in the circuitry.

Apologies for the basic questions. Just starting out.

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