HP E1433A User's Guide
The
Arm and Trigger
This section explains some terminology relating the the “Arm” and “Trigger” steps in the measurement loop. As an example a measurement might be set up to arm at a certain RPM level and then subsequently trigger at an external event corresponding to top dead center (TDC). The settings would be:
Arm: | RPM Step Arm | |
Trigger: | External Trigger |
If you want to begin a throughput session at this same RPM/TDC event, then the first external trigger after a specified RPM would start a continuous mode measurement. Now (using overlap block mode) the settings would be:
| RPM Step Arm |
Arm: | Auto |
Trigger: | Auto |
In the measurement loop, an arm must take place before a trigger. You can program how many triggers to do before waiting for another arm condition. The default is one trigger for each arm. For each trigger, a block of data is sent to the host.
The first arm in a measurement is the
Valid Arm (and
Auto Arm
Manual Arm
RPM Step Arm
Valid trigger conditions are:
Auto Trigger
Input Trigger
Source Trigger
External Trigger
Manual Trigger
Tachometer Edge Trigger
