BK Precision MDL4U Series, Руководство пользователя

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Load Connection 29
3.3 External Trigger Connections
There is five kinds of trigger modes.To set the trigger mode:
1. Press the ( + ) to enter the System menu.
2. Press the navigation keys to select Trigger Source .
3. Press the navigation keys to select the desired trigger mode.
3.3.1 Trigger Modes
Manual Trigger Mode
To use the front panel trigger mode, set the trigger source to MANUAL .
Once trigger mode is set to manual press the
External Trigger Mode
To use rear panel trigger mode, set the trigger source to EXTERNAL . Inputting a TTL level pulse (>10 us) to the
trigger signal input (pin 1) of mainframe’s Mainframe 8-pin Control Connector on the rear panel will enable a trigger
operation. Figure 3.4 shows one way to produce a trigger signal.
Figure 3.4 Contact
with a TTL Pulse Source
When making contact with a TTL pulse source, it produces a trigger to change the setting value (voltage, current,
resistance, etc.), e.g. switch in transient mode, or create a pulse in dynamic pulse mode. At the same time, it will output
a trigger signal on pin 2.
Hold Trigger Mode
To use hold trigger mode, set trigger source to HOLD . Then send the TRIG:IMM command to trigger the electronic
load. Pin 2 of 8-pin Control Connector on the rear will also output a corresponding trigger signal when the electronic
load receives the TRIG:IMM command.
Bus Trigger Mode
To use BUS trigger mode, set the trigger source to BUS . Connect the electronic load by GPIB, USB, or Ethernet
communication interface.
When the TRIG command is received, the load will produce a trigger signal.
Timer Trigger Mode
To use timer trigger mode, set the trigger source to TIMER . Set the TRIGGER TIMER’s time, and the electronic load
will trigger at specified trigger timer setting and also produce a trigger signal on rear Trigger Out pin.