Capter 3
Function Setting and Basic Operation
Curve Tracer CS-3000 Series Instruction Manual
3-107
In LIMIT SWEEP submenu, it is possible to set LIMIT SWEEP function which puts restrictions on a
measurement value of the vertical/horizontal axis. It is useful when:
- A measured device is to be protected by putting restriction on the current/voltage value.
- SWEEP is stopped at the preset current/voltage value.
It is possible to put restriction on either of vertical/horizontal axes or both. When starting SWEEP,
it is possible to put restriction on normal SWEEP measurement using LIMIT SWEEP function.
Therefore, LIMIT SWEEP is set to OFF in the initial state and only when required, it should be set to
ON.
SWEEP key is used to start SWEEP of LIMIT SWEEP function.
CONSTANT VOLTAGE / CURRENT submenu can continuously apply constant voltage or current.
It is effective in the load test to check reliability and stability of the semiconductor device. If this
option is combined with the semiconductor parameter measurement application CS-810 (option)
and allows the PC to remotely control the curve tracer itself, the device load can be automatically
tested.
The feature of this function is to make stable long-sustained application of voltage or current since
the voltage or current to be applied to the device keeps constant even if influence; e.g.
environmental change and change to the device by the voltage or current to be applied is received.
In this function, VOLTAG or CURRENT is selected as the parameter to be constant.
However, specification can be made only to the voltage between the collector and emitter on the
horizontal axis (Vce) or the collector current on the vertical axis (Ic).
* If the horizontal axis is the BASE – EMITTER range, this function cannot be used.
The settings below are made after selecting the parameter:
- Set the target value and the permissible range (%) of the parameter (voltage / current).
- Specify the range to return to the target value.
* Measure the device characteristics in advance and rotate the VARIABLE knob of the curve tracer
itself to decide the setting range of VARIABLE in the unit of %.
- Set the upper / lower limit values of the measurement values (Vce and Ic) to protect the device
when measuring it.
For details of setting, refer to Section 3.11.7.3.
When this function starts, SWEEP measurement is executed in the setting range from START
VARIABLE preset by COLLECTOR SETUP and continuous application (REPEAT measurement)
starts at the nearest point to the target value. If the measurement value exceeds the permissible
range of the target during application because of environmental change, SWEEP measurement
starts at that point in the setting range of COLLECTOR SETUP and returns to the nearest point to
the target value.
If this value is out of the permissible range of the target, the error occurs; i.e. application stops. In
addition, the value out of the range preset by OBSERVE SETUP is measured during application,
the error occurs; i.e. application stops.
Note that when Vth CONSTANT VOLTAGE / CURRENT menu is executed, other keys are invalid
excluding the ABORT key, the STOP key in the menu, and the CLEAR key to the front panel.
Summary of Contents for CS-3000 Series
Page 1: ...Instruction Manual Curve Tracer CS 3000 series CS 3100 CS 3200 CS 3300 ...
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