Meinberg TCR170PEX - Manual (Page 19)

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Time capture inputs
Two time capture inputs (CAP0 and CAP1) are provided at a contact strip of
TCR170PEX to measure asynchronous time events. A falling TTL slope at one of
these inputs lets the microprocessor save the current real time in its capture buffer.
From the buffer, capture events are transmitted via the PCI-bus or the serial interface
COM0. The capture buffer can hold more than 500 events, so either a burst of events
with intervals down to less than 1.5 msec can be recorded or a continuous stream of
events at a lower rate depending on the transmission speed of COM1 can be measu-
red. The format of the output string is ASCII, see the technical specifications at the
end of this document for details. If the capture buffer is full a message „** capture
buffer full“ is transmitted, if the interval between two captures is too short the
warning „** capture overrun“ is being sent.