billkarsh/SpikeGLX

adc bit resolution in meta file?

jkbhagatio opened this issue · 3 comments

jkbhagatio commented

It looks like this information is not included, would it be possible to add this?

billkarsh commented

As of NP 2.0 the metadata include item imMaxInt which, going forward, you should parse if present. If not present assume the value 512 which is correct for all probes earlier than 2.0.

jkbhagatio commented

image

So this table is taken from the neuropixels 1 manual. Wouldn't this mean the resolution is 1024 (2^10), or am I misunderstanding something?

billkarsh commented

2^10 = 1024 values, but they are signed, and cover range [-512, 512). The metadata item is imMaxInt which would be 512 for 10-bit signed data.

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