[time-nuts] Differences between the Trimble Resolution-T and -SMT timing receivers

[Mark Sims]

Our friends from Old Cathay sell two versions of the Trimble Resolution timing receiver:  the -T and the -SMT.

The -T is a 12 channel receiver built of discrete components on both sides of the PCB.  It is spec'd at +/-20 ns accuracy (the sawtooth correction range).  It can be set up operate in a moving environment which would allow it to function as a general purpose GPS receiver.  In dynamic mode,  it is abut 1/3 as accurate as when in fixed location mode.  I don't have one in yet,  but it can probably take advantage of Lady Heather's precise survey position code.

The -SMT is a 14 channel receiver built around a tiny hybrid receiver module (it never seems to use more than 10 sats in its navigation solution).  It has much fewer components than the -T version and is probably more robust/reliable.  It is spec'd at +/-15 ns accuracy.  It can ONLY operate at a fixed location.