Counter Timing Signals .................................................................................................7-26
Counter n Gate Signal .....................................................................................7-28
Counter n Aux Signal ......................................................................................7-28
Counter Triggering ........................................................................................................7-32
Arm Start Trigger ............................................................................................7-32
Start Trigger.....................................................................................................7-32
Pause Trigger...................................................................................................7-32
Other Counter Features ..................................................................................................7-33
Cascading Counters .........................................................................................7-33
Counter Filters .................................................................................................7-33
Prescaling ........................................................................................................7-34
Synchronization Modes ...................................................................................7-38
© National Instruments Corporation
80 MHz Source Mode .......................................................................7-39
ix
Contents
NI 6238/6239 User Manual