Does anyone have experience with the Trimble SMT 360 ? I bought some of these four or five months after they were released. During testing, the 1 pps output evidenced a problem, as shown in the attached plot (the 1 pps is being measured against a Cs beam standard), which is not sawtooth-corrected. While there are longish periods of nominal operation, the receiver seems to hop between two solutions. This behaviour is well out of specification.
When I contacted Trimble support, they said that the firmware in the receivers was very early, and replaced the receivers. However, the problem was still evident with the new firmware. Trimble did not respond to further emails. I tried many things to isolate the problem, including restricting the receiver to GPS-only but I was unable to make an improvement. I would like to know if anyone else is operating an SMT 360 and if they have seen any similar behaviour. Cheers[image: Inline image 2] Michael[image: Inline image 1]
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