Tektronix 371B, Service Manual

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General Information
371B Service Manual
2-5
The step generator supplies one voltage or current step, or pulse, for each
collector supply sweep or pulse. The amplitude of the voltage or current is set by
the STEP/OFFSET AMPLITUDE knob and the number of steps by the
NUMBER OF STEPS selection buttons. The signal from the step generator can
be applied to the base or emitter (or an equivalent terminal) of the DUT.
The detector amplifiers are connected to the DUT to measure the effect of the
stimulus signals from the collector supply and the step generator. The measure-
ment result is amplified and the voltage obtained is applied to the CRT deflection
plates. Sensitivity of the amplifier is set by the VERTICAL CURRENT/DIV
(vertical current per division) and HORIZONTAL VOLTS/DIV (horizontal volts
per division) knobs.
Installation
The 371B Programmable High Power Curve Tracer weighs approxi-
mately 36 kg (80 lb). It requires two people to lift the instrument out of its
shipping carton. Work carefully to avoid injury due to improper lifting.
The CRT can implode if it or the 371B is handled severely. When handling the
371B always be aware of and practice safe work habits. If damaged, the CRT
could implode resulting in serious personal injury
All shipping containers and internal packing material should be saved for reuse.
Perform the following to unpack the 371B from its shipping container and to
perform initial inspection.
1. Remove the securing bands holding the outer lid on the shipping container.
2. Lift the lid off the shipping container.
3. Remove the accessory box from the carton. Set this box aside to be unpacked
later.
4. Carefully lift the 371B and the test fixture unit out of the shipping container
and place them on a flat, sturdy surface.
DO NOT apply power at this time otherwise severe instrument
damage may occur.
Step Generator
Detector Amplifier
Initial Inspection