TABLE
2-1.
CONTROLS,
INDICATORS,
AND
CONNECTORS
ITEM
OSCILLOSCOPE section:
DESCRIPTION
FRONT
PANEL
(figure 2-1)
FUNCTION
'----,
Horiz switch
Horiz vernier control
Ext Horiz
Trig Level
Position controls
Seven-position rotary
switch
Potentiometer
BNC connector
Stacked concentric
potentiometer and switch
Concentric
potentiometers
When in the oscilloscope mode, selects the horizontal
sweep rate or external horizontal input.
Horizontal sweep rate vernier
or
external horizontal input
gain vernier. Calibrated position
is
fully clockwise.
Allows external horizontal inputs for oscilloscope. High in-
put impedance.
Selects oscilloscope trigger level and trigger mode. Center
knob selects the level
of
trigger. Outside (largest) knob con-
trols the trigger mode. In Auto position, continuous sweep
with no vertical input signal, syncs
on
vertical input. Nor-
mal position, no sweep unless vertical input
is
present,
syncs
on
vertical input.
CAUTION
During Tone Sequence mode, entering a scope trigger delay
prevents normal operation
of
scope triggering.
Controls the posItIOn
of
the CRT display, when in the
oscilloscope mode.
'--.......-
• Vert
o Horiz
Vert switch
Vert Vernier control
VertiSinad/Dist
DVM/Counter
In
connector
Center (small) control knob Controls the vertical position
of
the
CRT
display
Outside (large) control Controls the horizontal position
of
the
CRT
display
knob
Four-position rotary switch Oscilloscope operation uses values marked to the right
of
the switch, indicating volts per division
on
the CRT. Modu-
lation display mode uses values marked to the left
of
the
switch, indicating range for calibrated FM deviation. This
switch also controls Frequency Counter sensitivity.
Potentiometer Vernier gain control for vertical inputs to the
CRT
when in
the oscilloscope mode. Calibrated position
is
fully
clockwise.
BNC connector Signal input to the equipment for the following operations
(one megohm input impedance):
1.
External vertical for oscilloscope operation
2.
SINAD/Distortion Meter
3.
Digital Voltmeter
4. Frequency Counter
2-8
'--..-/
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