Sony Digiruler PL21 - OPERATION; Setting Resolution and Output Pulse Width

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3. OPERATION
Note (PL21)
The compensation value of 0.9 µsec for the minimum phase
difference and pulse width will differ according to output load
conditions (cable length, receiving circuit of connected
device, etc.). When setting the minimum phase difference
and pulse width to 2.5 µs, adjust the output load 1 kΩ or less.
3-1. Setting Resolution and Output Pulse Width
The resolution of this detector is factory-set to 10 µm, TW 20 µs.
Shown below are the output signal specifications for factory setting.
A/B signal output specifications
Tw: Minimum phase difference: 20 µs (20 µs – 0.9 µs at PL21)
10μm
100μs
A
B
10μ10μ10μ
100μs
≅≅
Resolution
(OFF)
(OFF)
Reverse
(ON)
The phase difference between A output and B output is
designated as 1 count and also resolution.
4Tw: Minimum period: 80 µsec
10μm
UP
DOWN
10μm
Tw
Tw
2
Minimum repeat cycle: 20 µs
Pulse width: (PL21) 10 µs + 0.9 µs
(PL22) 10 µs
Output pulse is sometimes output for every Tw even when the
movement speed is slow.
Resolution
Up/Down pulse output specifications (PL21/PL22)
(ON)