Tektronix 371B, Service Manual

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371B Service Manual
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Product Overview
The 371B Programmable High Power Curve Tracer provides both high current
and high voltage for testing high-power semiconductor devices at user-selected
power settings. It can test devices at up to 400 amps at power levels up to
3000 watts. By measuring and displaying the characteristics on a CRT screen,
the 371B enables a user to analyze and evaluate the static characteristics of
semiconductor devices.
Non-volatile memory (RAM) and floppy disk storage enable you to store
frequently used test setups and curve characteristics for quick and easy measure-
ment comparisons. Using memory in this way helps you avoid errors associated
with manual testing, and allows you to run more repetitive-type tests in any
given period. You can store up to 64 characteristic curves and 64 setups on a
floppy disk, and up to 16 characteristic curves and 16 setups in non-volatile
memory. Stored characteristic curves and setups can be recalled for additional
analysis and comparison.
The 371B provides direct readout on the CRT of offset base/gate voltage or
current. The 371B calculates these values for you, unlike earlier curve tracers
where these functions had to be calculated manually.
The 371B also has the ability to average readings to reduce the effects of random
noise, which can obscure actual curve data.
The rear panel contains a GPIB connector. The GPIB connector is for use by a
GPIB-compatible controller or other GPIB instrumentation. Using this connector
and appropriate GPIB instruments, you can create and control tests to suit your
application. A typical GPIB system will include a controller and one or more
instruments, such as the 371B, a signal generator, a digital multimeter, and a
digital oscilloscope. Some GPIB instruments are talk only or listen only devices
while others can both talk and listen. The 371B does both. Linking a controller
to the 371B, and possibly other instruments, provides operation in four major
task areas:
Program development
System control
Data processing
Display and storage