371B Service Manual
2-1
General Information
This section provides the following information:
Description and features of the 371B Programmable High Power Curve
Tracer.
Measurement concept
Initial inspection procedure
Installation procedures
Repackaging procedure for shipment
Product Description
The 371B is a high-power, GPIB-programmable digital-storage curve tracer that
provides static and dynamic semiconductor device testing. This versatile
instrument stimulates, measures, and displays the semiconductor characteristics
of a variety of two-, three-, and four-terminal devices; including bipolar
transistors, field effect transistors, silicon-controlled rectifiers, diodes, and
thyristors. A variety of measurements can be performed using either grounded-
emitter or grounded-base configurations.
The collector supply produces either high-current pulses (up to 400 A) or a
sine-square high-vole waveform (up to 3 kV). The high-current pulses enable
dynamic testing of high-power devices while keeping the internal heating of
these devices to a minimum. The high-voltage/low-current output enables
measurement of static characteristics, such as breakdown voltage. A step
generator produces voltage steps or current pulses, or steps, of either polarity for
application to the base or emitter terminal.
In addition to conventional curve tracer performance features, the 371B includes
the following features.
Digital storage capability that allows bright and stable display of characteris-
tic data.
A mass storage system that consists of non-volatile memory and a 3.5 inch
floppy disk drive. Up to 64 families of characteristic curves and 64
front-panel setups can be stored in a floppy disk. Up to 16 families of
characteristic curves and 16 front-panel setups can also be stored in
non-volatile IC memory. The stored characteristic curves can be recalled for
additional analysis and comparison.
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