Motorola R-2002A Manual page 32

Item
Horiz Vernier control
Ext Horiz
Trig Level
Position controls
• Vert
• Horiz
Vert switch
Vert Vernier control
Vert/Sinad/DVM/
Counter In connector
Table 4-1 Controls, Indicators, and Connectors (Cant)
Description
Potentiometer
BNC connector
Stacked concentric
potentiometer and
switch
Stacked concentric
controlled potentiometer
Center (small) control
knob
Outside (large) control
knob
Four-position rotary
switch
Potentiometer
BNC connector
4-10
Function
Horizontal sweep rate Vernier or external hori-
zontal input gain Vernier. Calibrated position
is fully clockwise.
Allows external horizontal inputs for oscilloscope.
Selects oscilloscope trigger level and trigger
mode. Center knob selects the level of trigger.
Outside (largest) knob controls the trigger
mode. In Auto position, continuous sweep with
no vertical input signal, syncs on vertical input
Normal position, no sweep unless vertical input
is present, syncs on vertical input.
Controls the position of the CRT display, when
in the oscilloscope mode.
Controls the vertical position of the CRT
display
Controls the horizbntal position of the CRT
display
Oscilloscope operation uses values marked to
the right of the switch, indicating volts per
division on the CRT. Values marked to the left
of the switch are used during modulation
display mode, indicating range for calibrated
FM deviation.
NOTE: Frequency Counter sensitivity
is also controlled by this switch.
Vernier gain control for vertical inputs to the
CRT when in the oscilloscope mode. Fully
clockwise is the calibrated position.
Signal input to the equipment for the following
operations:
a. External vertical for oscilloscope
operation
b. SINAD Meter
c. Frequency Counter
d. Digital Voltmeter
I .