Instrument Type:

Any instrument with TTL inputs that support these modes.

Description:

TTL inputs on supported instruments respond to four types of device output signals. The default TTL signal mode, normal edge, is compatible with the output signals provided by most Dionex modules. If the controlling device outputs a different signal type, select a different signal mode.

Parameters:

Normal_Edge

In normal edge operation, the negative (trailing) edge of a signal turns on the function and the positive (leading) edge turns off the function.

Inverted_Edge

The inverted edge mode works identically to the normal edge mode, except that the positive and negative edges are reversed in function.

Normal_Pulse

In normal pulse operation, the negative (trailing) edge of the TTL signal is the active edge and the positive (leading) edge is ignored.

The minimum pulse width guaranteed to be detected is 50 ms. The maximum pulse width guaranteed to be ignored as noise or invalid is 4 ms. The action is undefined for pulses less than 50 ms or greater than 4 ms.

Inverted_Pulse

The inverted pulse mode operates identically to the normal pulse mode, except that the positive and negative edges are reversed in function.