Elenco 30MHz Dual Trace - Manual (Page 35)

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CONTROLS AND INDICATORS
CAL Terminal(9): Terminal provides 2V p-p, 1 KHz(nominal) square wave
signal. This signal is useful for checking probe compensation adjustment, as
well as providing a rough check of vertical calibration.
BEAN FIND Pushbutton(12): Momentary-contact pushbutton speeds setup
of trace position by bringing the beam into graticule area; operates
independently of other display controls.
VERTICAL CONTROLS
VERTICAL Mode Switch(7)
Selects vertical display mode. Four-position lever switch with the following
positions:
CH 1: Displays the channel 1 signal by itself.
CH 2/X-Y:
CH 2: Displays the channel 2 signal by itself.
X-Y: Used in conjunction with the X-Y control and TRIGGER SOURCE switch
to enable X-Y display mode.
DUAL:
Displays the channel 1 and channel 2 signals simultaneously, Dual-trace mode
may be either alternate or chopped sweep; see the description under HOLD
OFF/PULL CHOP ( 100MHz: Cannel 1 POS/PULL CHOP control ).
ADD: The inputs from channel 1 and channel 2 are summed and displayed as
a single signal. If the Channel 2 POSITION/PULL INVERT control is pulled
out, the input from channel 2 is subtracted from channel 1 and the difference is
displayed as a single signal.
CH 1 AC-GND-DC Switch(1)
Three-position lever switch the following positions:
AC: Channel 1 input signal is capacitively coupled; dc component is blocked.
GND: Opens signal path and grounds input to vertical amplifier. This provides a
zero-volt base line, the position of which can be used as a reference when
performing dc measurements.
DC: Direct coupling of channel 1 input signal; both ac and dc components of
signal produce vertical deflection.
CH 1(X) Input Jack(2): Vertical input for channel 1, X-axis input for X-Y
operation.