The Model 120B is a general-purpose oscilloscope whose
bandwidth extends from dc to 450 kc. It combines the
precision characteristics of calibrated
horizontal sweeps, calibrated vertical sensitivity, and a
crt that eliminates parallax error; in addition, its
construction provides easy circuit accessibility and quick
convertibility from a rack-mounting to a bench-model
configuration. Specifications are listed in table 1 -1.
The internal graticule of the Model 120B is in the same
plane as the phosphor and crt trace; consequently, crt
parallax error is avoided, allowing easier, quicker, and
more accurate measurements.
The Model 120Bcan be used with either internal or external
sweeps, which can be either internally or externally
synchronized. Because of its high sensitivity and balanced
input, the Model 120B can be used to view complex waveforms
and monitor transducer outputs.