Define Instruments PRO-CTR200 Manual page 15

6.5 - A–B
In this mode the A and B signals are linked in a phase relationship. Signal A incre-
ments the primary counter on every rising edge, while signal B decrements the pri-
mary counter on every rising edge.
Signal A
Signal B
Primary counter increments:

On a rising edge A signal
6.6 - A&B Independent
In this mode there is no fi xed relationship between signals A and B. Signal A
increments the primary counter on every rising edge, and signal B increments the
secondary counter on every rising edge.
Signal A
Signal B
Primary counter increments:

On a rising edge A signal
6.7 - Up/Down
In this mode the A and B signals are linked in a phase relationship. Signal A incre-
ments the primary counter on every rising edge when signal B is low. Signal A also
decrements the primary counter on every rising edge when signal B is high.
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Primary
Counter
Primary
Counter
Primary counter decrements:

Primary
Counter
Secondary
Counter
Secondary counter increments:

Signal A
Signal B
On a rising edge B signal
Signal A
Signal B
On a rising edge B signal
Primary
Counter
Primary
Counter
Primary
Counter
Secondary
Counter
PRO-CTR-MAN-16V03 (0128)
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