Elenco 30MHz Dual Trace - Manual (Page 37)

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CONTROLS AND INDICATORS
PULL X5 MAG: When pulled out, increases vertical sensitivity by a factor of
five. Effectively provides two extra sensitivity settings: 2 mV/DIV and 1 mV/DIV.
In X-Y mode, increases Y-sensitivity by a factor of five.
CH 2 (Y) Input Jack(13): Vertical input for channel 2. Y-axis input for X-Y
operation.
CH 2 AC-GND-DC Switch(14): Three-position lever switch with the following
positions:
AC: Channel 2 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 2 input signal; both ac and dc components of
signal produce vertical deflection.
HORIZONTAL CONTROLS
Main Time Base TIME/DIV Control(15): Provides step selection of sweep
rate for the main time base. When the VARIABLE SWEEP control is set to CAL,
sweep rate is calibrated. This control has 23 steps, from 0.1 μS/DIV to 2 S/DIV,
in a 1-2-5 sequence (100MHz: 23 steps, from 20 nS/DIV to 0.5 S/DIV, in a 1-2-5
sequence) .
DELAY Time Base TIME/DIV Control(17): Provides step selection of sweep
rate for delayed sweep time base. This control has 23 steps, from 20 nS/DIV to
0.5 S/DIV, in a 1-2-5 sequence.
DELAY TIME POSITION Control(20): Sets starting point of delayed sweep.
Clockwise rotation causes delayed sweep to begin earlier.
VARIABLE Sweep Control(22): Rotation of control is vernier adjustment for
sweep rate. In fully clockwise (CAL) position, sweep rate is calibrated. This
control is the vernier adjustment for both te main and delayed time bases.
POSITION/PULL X10 MAG Control(18):
POSITION: Horizontal(X) position control.
PULL X10 MAG: Selects ten times sweep magnification when pulled out.
Normal when pushed in. Increases maximum sweep rate to 10 nS/DIV.
Sweep Mode Switch: Selects sweep (horizontal) mode. Four-position rotary
switch with the following positions:
MAIN: Only the main sweep operates, with the delayed sweep inactive.