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Figure 2-27.-Circuit signatures: View A-Low-range open circuit; view B--medium and high range open circuit; and view
C--all ranges short circuit.
You use three other CRT controls to adjust
lower left of the CRT (fig. 2-27, view A)
the brightness and clarity of the trace--lNTEN-
represents an open circuit. In the HIGH and
SITY, FOCUS, and ASTIGMATISM. The front
MEDIUM ranges, an open circuit shows as a
panel intensity control is the primary means of
horizontal trace from the left to the right (fig.
adjusting the visual characteristics of the trace.
2-27, view B). When you short the terminals
The focus control is on the back panel and is
together, the maximum current flows through the
operator adjustable. The astigmatism trim pot is
terminals, and the voltage at the terminals is zero.
inside the 1000 on the main printed circuit board.
A vertical trace from the top to the bottom of the
The pot is factory adjusted to the correct setting.
CRT graticule in all ranges shows this short (fig.
2-27, view C).
Huntron Tracker 2000
The CRT deflection drivers boost the low-level
The Huntron Tracker 2000 (fig. 2-28) is a
outputs from the signal section to the higher
versatile troubleshooting tool having the following
voltage levels needed by the deflection plates in
features:
the CRT. The HORIZONTAL and VERTICAL
controls on the front panel adjust the position of
Multiple test signal frequencies (50/60 Hz,
400 Hz, 2000 Hz)
the trace on the CRT display.
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Figure 2-28.-Huntron Tracker 2000.
