Operating information—2205 Service
- \
Tfekhonix 2205 20MHz OSCILLOSCOPE
^horizontal «^.f®s#»;TRiGGER f-zmm.
IN TiNSITY , .Q. POSITION
6716-OS
Figure 2-2. Front panel controls, connectors, and indicators.
(T5) Variable VOLTS/DIV Controls—Provide con
tinuously variable deflection factors between
calibrated positions of the VOLTS/DIV switch.
Reduces gain by at least 2.5 times at the fully
counterclockwise rotation of the variable
knob. A detent position at full clockwise ro
tation indicates the Calibrated VOLTS/DIV
position of the variable knob.
(j4 ) AC-GND-DC (Input Coupling) Switches—
Select the method of coupling the Input signal
from the CH 1 OR X and CH 2 OR Y connectors
to the vertical amplifiers.
AC—Capacitively couples the input signal to
the vertical deflection system. The do com
ponent of the input signal is blocked. The
lower -3 dB bandpass is 10 Hz or less.
GND—Grounds the input of the vertical de
flection channel; provides a zero (ground)
reference voltage display (does not ground
the input signal) .
DC—All frequency components of the input
signal are coupled to the vertical deflection
and signal acquisition systems.
2-4
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