The System /LP,based on Front Panel settings, selects
the display mode for the Vertical and Horizontal Vector
Generators. The selected input, either Vector, Dot,
Envelope, or Readout inputs, from each Vector Generator
is coupled through to its corresponding Vertical or Hor-
izontal Output circuit (diagram 18). There they are
amplified and converted from single-ended to double-
ended, to drive the Vertical or Horizontal plates of the crt
(diagram 19). Both Vertical and Horizontal Output circuits
have voltage offset and gain adjustments and are compen-
sated for "spot wobble" (variations in beam placement on
the crt screen with variations in beam intensity) by the
Intensity circuit (diagram 6) via the Spot-Wobble Correc-
tion circuit.
passed through an rc integrator that produces vectors
between the min-max data points of the Envelope Mode
display.
3-14
A Display Mode Switcher selects between the Vector
Generator signals, a dots-only signal or an envelope
display signal. With Envelope mode selected, the signal is
The Vector Generators consist of a High-Current
Difference Amplifier, a Sample-and-Hold circuit, and a
Integrator to produce the vectors that connect the sample
points in the display. Signals for vectored displays are con-
tinuously sampled and held, and integrated. The input volt-
age integrated is the difference between the voltage level
of the sample presently being held and the intergrated
level of the sample immediately preceding it. This action
allows a smooth transition between the individual steps for
a continuous display.
Theory of Operation-2430 Service
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