Quick Start Guide

Chapter 2 Function and Features SIGLENT
SDL1000X User Manual 35
on page 3 of the Dynamic test. Pressing this key will trigger the step.
Ext sets the trigger type to external, which looks for a valid trigger on
the rear panel Ext Trig input. Bus is a trigger sent over the remote
control bus. See “Set trigger” in Section 3 for more details. Press
On/Off to turn on the channel input. At this time, the actual input
voltage, current, resistance and power will be displayed on the main
interface.
OCPT Test Function
Overcurrent Protection Testing (OCPT) uses preset limits on current to halt
a test. At the beginning of a test, the load measures the input voltage. If this
value meets or exceeds the Von setpoint (OCP_V), the load starts to sink the
current after a period of delay time. The load then increments the sink current
value using the user-defined step size (I_Step) and time interval (Delay). At
each step, , the load measures the input voltage and compares it to the
protection voltage value (OCP_V). If the measured value is higher, it indicates
that OCPT does not occur. If the load has not reached the maximum current
set poiunt (I_MAX), the sink current will increment again. The load proceeds to
run and increases with regular steps until it reaches the set protection voltage
value (OCP_V) or the end current (I_End). If the sink current of the load
reaches the stop value at any time during the test, the load will halt the test
automatically. The OCPT test fails, and the test ends. If lower, it indicates that
OCPT does occur. Judge whether the current under test is within the set
current range (I_MIN to I_MAX). If yes, the load passes the test. If no, the
load fails the test.