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OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL
VERTICAL AXIS (VERTICAL)
[12]
CH1 (X). The input terminal of vertical channel CH1. In X-Y operation mode is
X-axis.
CH2 (Y). Input terminal of vertical channel CH2. In operation mode X-Y is Y-axis.
[16]
[11] [15] AC/GND/DC. Select connection mode between input terminal and vertical
amplifier for channel CH1 and CH2 respectively.
AC
GND
DC
[10] [14] VOLTS/DIV. Selects the CH1/CH2 vertical axis sensitivity from 5 mV/DIV to
5 V/DIV with 12 ranges totally.
[13] [17] VARIABLE. Fine adjustment of sensitivity of CH1 & CH2 vertical axis respectively
with a factor of ≥ 1/2.5 of the indicated value. The sensitivity is calibrated to
specific value in the CAL position of VARIABLE control.
[40] [37]
POSITION. Vertical positioning control of the CH1/CH2 trace on the CRT
display. Clockwise turning shifts trace up and anticlockwise turning shifts trace
down.
[39]
MODE. Select operation mode of CH1 and CH2 amplifiers.
CH1
CH2
DUAL Operate the oscilloscope as a dual-channel instrument by selecting
ADD
[41]
CHOP. Operative in DUAL mode only.
Switch engaged CH1 & CH2 signal traces are chopped and displayed
simultaneously. That is, each horizontal sweep of the electrons beam of the CRT.
Normally used at slower sweep speeds.
[36]
CH2 INV. Inverts CH2 signal polarity.
[20]
Ground terminal.
TRIGGERING
[23]
EXT TRIG (EXT HOR). Input terminal is used in common for external triggering
signal and external horizontal signal. To use this terminal, set SOURCE switch
[26] to the EXT position.
November 2000
Blocks DC component of the input signal.
Connect the vertical amplifier of the CH1-CH2 to ground, establishing a
ground reference.
Connect CH1-CH2 amplifier to the input terminal, visualising AC & DC
component of the signal.
Operate the oscilloscope as a single-channel instrument by selecting
CH1 alone.
Operate the oscilloscope as a single-channel instrument by selecting
CH2 alone.
CH1 and CH2 (see control [41] description).
The oscilloscope displays the algebraic sum (CH1 + CH2) or
subtraction (CH1 - CH2) of the two signals (the subtraction function
effects only when push in CH2 INV [36] button).
Page 13
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