AES# 01-14-xxx) Use the AES Trigger Pickup to sync lab scope display to an ignition event. When attached to a plug wire, the AES Trigger Pickup will shape the signal into a clean pulse that your scope can use as a trigger. Displaying a trigger signal on the screen is a very powerful aid for signal analysis, whether you need to judge the relationship of a signal to a position of the crank shaft or to an ignition event, or simply, just to hold/stabliize a repetitive signal. The pulse produced by the trigger pickup makes this possible. ApplicationsStepping through the Crank Signal: Many crank signals are very repetitive without any specific characteristic to trigger from. This results in a signal that walks left and right across the screen. Put the AES Trigger Pickup on #1 plug and trigger from it. The crank signal will now be stabilized. To step through the crank signal, move the Trigger Pickup to the next plug wire…and the waveform will update a new section of the signal! Cranking Compression: Place the AES Trigger Pickup on #1 spark plug and perform a cranking compression test. The Trigger Pickup signal will represent #1 compression in the cranking compression waveform. Exhaust Pressure Testing: Same as above. Use the AES Trigger Pickup signal to mark fire in the hole - #1. The AES Trigger Pickup (Inductive) Lead is an 'external trigger' and connects to any scope channel, usually channel 1. My scope has a internal trigger, do I need an external trigger?Some scopes, such as MODIS, VERUS, Fluke 98, have a dedicated ignition trigger input but they do not display the trigger signal, this can put you at a disadvantage. For example, when you slow the time base, if the trigger pulse is not visible it is difficult to judge when the next firing event occurs. With the trigger pulse on display you know exactly when it happens in relation to the other waveforms on display. Scope SetupGeneral instructions for setting your scope to display a firing event (trigger pulse) are included with the test lead. Test Lead ConfigurationThe AES Trigger Pickup (Inductive) Lead is 6-ft long. Connection to scope: The test lead is configured with either BNC or banana plugs for connecting to your scope (tell us which connector you need when placing your order). For scopes with banana plug inputs, the lead's ground banana plug is stackable to allowing other channels to access the scope's ground when using multiple channels. Connection to vehicle: The test lead has one connection on the vehicle: Trigger pickup clamps around plug wire. A ground connection is not necessary since the lead is inductive.
