Re: [time-nuts] Thunderbolt code phase measurement

2018-05-16 Thread D. Jeff Dionne
On May 16, 2018, at 15:01, Mark Sims wrote: > > Many thanks Peter for confirming what I suspected. The problem with the > Trimble receivers is that requesting the satellite C/A code data can hose up > a lot of them. So, I'm stuck with calculating the integer number of > milliseconds. How

Re: [time-nuts] Thunderbolt code phase measurement

2018-05-16 Thread D. Jeff Dionne
On May 16, 2018, at 13:58, Peter Monta wrote: > > "Code phase" represents where you are along the 1023-bit C/A code (each bit > or "chip" of this code lasts ~1 microsecond or ~300 meters). The > scaled-by-16 code phase will thus range from 0 to 16*1023. To get the full > pseudorange, though,

Re: [time-nuts] trimble Thunderbolt, how to get 25 or 27 mHz from it??

2018-01-19 Thread D. Jeff Dionne
Chris, You don't need to do that. The SiLabs part will accept the 10MHz sin from an OCXO directly into the XA pin. That pin normally connects to a crystal, so there is a high gain amp in the chip to square it up already... I did the tests a while back, see the thread here: https://www.silabs