Elenco 30MHz Dual Trace - Manual (Page 39)

EXT: Signal from EXTERNAL TRIGGER jack becomes sweep trigger.
Trigger COUPLING Switch(24): Selects trigger coupling. Four-position level
switch with the following positions:
AC: Trigger signal is capacitively coupled.
TV-V: Used for triggering from television vertical sync pulses. Also serves as lo-
pass/dc (high frequency reject) trigger coupling.
TV-H: Used for triggering from television horizontal sync pulses. Also serves as
hi-pass (low frequency reject) trigger coupling.
LINE: Signal derived from input line voltage(50/60 Hz) becomes trigger.
TRIGGER LEVEL/PULL (-) SLOPE Control(26):
TRIGGER LEVEL: Trigger level adjustment; determines the point on the
triggering waveform where the sweep is triggered. Rotation in the (-) direction
(counterclockwise) selects more negative triggering point; rotation in the (=)
direction (clockwise) selects more positive triggering (clockwise) selects more
positive triggering point.
PULL (-) SLOPE: Two-position push-pull switch. The “in” position selects a
positive-going slope and the “out: position selects a negative-going slope as
triggering point for main sweep.
EXTERNAL TRIGGER Jack(16): External trigger input for single- and dual
trace operation.
REAR PANEL CONTROLS (P.29~30)
Fuse Holder/Line Voltages Selector(35)(36): Contains fuse and selects line
voltage.
Power Cord Receptacle.
CH 2 (Y) SIGNAL OUTPUT Jack(39): Output terminal where sample of
channel 2 signal is available. Amplitude of output is nominally 50 mV per
division of vertical deflection seen on CAR when terminated into 50Ω.
Z-Axis Input Jack(38): Input jack for intensity modulation of CRT electron
beam. TTL compatible (5V p-p sensitivity). Positive levels increase intensity.
AC Power Input Connector(37).
Feet/Cord Wrap(40).
36
CONTROLS AND INDICATORS