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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.