High resolution event timer channel
| Channel Number | 97 |
| Total Length | 8bytes |
| Channel | Data1 | Data2 | Data3 | Data4 | Data5 | Data6 | Checksum |
Event details = Data1
GPS micro-second time of week = (Data2 x 2^32 + Data3 x 2^24 + Data4 x 2^16 + Data5 x 2^8 + Data6)
For Data1, bits 0 - 2 (the 3 least significant bits) are used to determine which trigger on a logger the signal has originated from.
Trigger numbers are 1-based on the logger fascias, but zero-based in this message, so:
Trigger number = (Data1 & 0x07) + 1
Bit 7, the msb, is used to indicate the polarity of the originating event.
if bit7 = 0 (i.e. Data1 & 0x80 == 0) then the event was triggered by a falling edge.
if bit7 = 1 (i.e. Data1 & 0x80 == 1) then the event was triggered by a rising edge.
This channel provides a method of outputting an event time with micro-second resolution referenced to GPS time.