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10kHz with interpolation?
multiple encoders?
- combine absolute/relative (may be complexity issues)
- 2 staggered slower encoders
need fpga timestamping
100 microev resolution requirement

	Option	max rate	work to be done	drawbacks/other consideration
A	absolute encoder used for relevant stage	10-20(?) kHz	controls: rework PLC to send data (current solution likely ~1kHz) DAQ: likely FPGA timestamping
B	absolute encoder used for relevant stage, interleave with second absolute encoder	20-40 kHz	as above	need to ensure both encoders read back equivalent data, intersperse jitter from both?, same latency
C	add a relative quadrature encoder on shaft	5 or more MHz	DAQ: need board to read signal & timestamp	complicated and possible not very reproducible mapping of measured & relevant motion
D	add a relative quadrature encoder in vacuum	5 or more MHz	DAQ: need board to read signal & timestamp engineering: figure out how to add relative encoder

To do

Feels like option D is doable according to conversation between Georgi and Danny Morton (meets with Axilon next week (manufacturer of mono assembly))
current default solution, but can still change (final decision in weeks)
Matt W. and Ryan H. think the camlink converter box could be used for this
- quadrature encoder "frame format" is understood and relatively simple (absolute encoders are more difficult)
- quadrature encoder readout can be triggered
currently no use case for high rate absolute encoders
- might need either a new camlink converter board with new connectors or some "connector transition"