User's Manual

Main Menu

The Main Menu consists of a set of menu selections used to set the operating mode, time pe-

riod and frequency of the 9412/9412A.

MODE - Pulse Modes

There are five (5) different Pulse modes available.

Continuous Mode

While in Continuous mode, the 9412/9412A will generate pulses at the rate set by the internal

To Period as set in the ToPer menu. The delay of Channel 1 is relative to To, while the delay

for Channel 2 is from the active edge of Channel 1.

The Ext/Gate input may be used as a gate or interlock by setting the GATE menu to Low or

High. Pulses will then only be generated while the Ext/Gate input is active. Selecting Low

will make the gate active low, while selecting High will make the gate active high. Set to Off

to disable the gate function.

Note: No pulses are generated until the Run key has been pressed.

External Trigger Mode

In the External Trigger mode, one pulse is output each time an active edge occurs on the

Ext/Gate input. The external trigger polarity menu (TRIG) is used to determine whether the

9412/9412A is triggered on the rising or falling edge of the external trigger.

The delay of each output is relative to the active edge of the external trigger, except for

Channel 2 which is delayed from the active edge of Channel 1.

Since it is being used as a trigger source, the Ext/Gate input cannot be used as a gate in this

mode.

Single Shot Mode

During Single Shot operation, one pulse is generated each time the Run key is pressed. The

rate at which pulses are produced is totally dependent on how fast the Run key is pressed.

The external trigger input may be used as a gate or interlock by setting the GATE menu to

Low or High. Pulses will then only be generated while the external trigger input is active. Se-

lecting Low will make the gate active low, while selecting High will make the gate active high.