BK Precision MDL4U Series, Руководство пользователя

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Operations 51
4.8 Trigger Operation
The trigger operation can be used in the following operations: transient pulse output, triggered output, and list output.
The electronic load has five kinds of trigger modes to synchronously trigger the tested instrument. Before enabling the
trigger function, the trigger source must be selected.
4.8.1 Manual Trigger
When manual trigger mode is active, pressing the Trig key on the front panel will enable a trigger operation.
4.8.2 External Trigger Signal(TTL level)
The
1𝑠𝑡
pin of the 8-pin connector on the rear panel of the mainframe is the trigger input terminal. When an external
trigger signal is available, input a low pulse (>10us) to the input and the load will enable a trigger operation.
4.8.3 Hold Trigger
When hold trigger is used, the load will enable a trigger operation only when the load receives the TRIG:IMM trigger
command from the communication port.
4.8.4 Bust Trigger
When bus trigger is set, the load will enable a trigger operation as soon as the load receives the trigger command GET
or *TRG.
4.8.5 Timer Trigger
When timer trigger is set, the mainframe will enable a trigger operation periodically.
4.9 Short Operation
The electronic load can simulate a short circuit at its input. During front panel operation, press the key to switch
the short on/off state. Short operation will not affect the present setting. When turning off the short state, the load
returns to the original set state.
The actual value of the electronic load in short operation depends on the mode and range that is active when the short
is turned on. In CC or CR mode, the maximum short current is 120% of the current range. In CV mode, short means
setting the load’s constant voltage to be 0 V. In short operation mode, you can measure the maximum short current
(Amax) or DC current (ADC) of the power source to be measured. This function via the Configuration menu. When in
remote control mode, send the SCPI command INPut:SHORt ON to enable the short operation.
4.10 Input On/Off Operation
During front panel operation, press the f key to switch the input on/off state. Input On/Off operation will not affect
the present settings. The load/unload speed of On/Off operation is not dependent on the rise/fall slew rate. When in
remote control mode, send the SCPI command “INPut ON” to turn the input on (refer to MDL4U Series Programming
Guide for more information on remote commands).