Trimble event marker input
I have a device which has a trimble event marker input and a 1 pps output that connects to a receiver via a lemo port. I bought it when I purchased a new 4700 in the late 90’s. Never used it.
The event marker input is a bnc connector. I want to rig up a normally open momentary action switch to apply a voltage to the event marker input. Has anyone done something like this? Any ideas on how to do it?
According to the receiver manual…
The event is triggered when the source pulse voltage transitions
between 1.0 V DC and 2.0 V DC in less than 100 nsec. Trimble
recommends that you use TTL level inputs. You can configure the
receiver to recognize either a positive (rising) or negative (falling)
voltage as the leading edge of a pulse. The accuracy of the associated
time tag recorded for an event is determined by the GPS accuracy
(typically less than 1 ?æsec.).
The 5700 receiver records each event in the current data file.
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