Need info on HEDS-6300 encoder. Sorta...

[Fifty_ohm]

I've got some HEDS-6300 units but haven't found all the info I need for these. After lots of searching and putting together info from various places I resorted to tearing a damaged one apart to inspect the board.

6 = 2" diameter
3 = 3 channel (2 channel count with an index)
0 = ?
0 = Denotes an entire assembly (housing, encoder disk, etc)

These are the 10 conductor cable type for which there are two distinct pinouts. I've matched pinouts for mine by examining the board.

I've modified the encoder disk hub from 1/4" hole to 3/8" to fit my larger NEMA 34 motors. Maybe the third digit in the 6300 means 1/4".??

This thread gives some info as to the letter codes for CPR but mine don't have a letter code. I've counted the slots in each channel (I was bored at work one night) and come up with the following.
Channel 1 (being furthest from the center) has 200 slots.
Channel 2 (being one row in from the outside edge) has 196 slots.
Channel 3 (you get the picture... I hope) has 2 which line up to both of the detectors for the index.

If I was just to use the first channel then my CPR would be 200x4=800.
Second channel would be 196x4=784.
So my question is how do I figure out what the total would be using both channels? Just add them together for a total of 1584?
I'm to the point of putting together some electronics to count pulses for a full rotation of the motor. However, I'd really like to know how this is figured mathematically.

Any help would be appreciated. Thanks.