Instructions

6
3.2 FUNCTIONS OF CONTROL SWITCHES
NO.
SWITCHES
FUNCTIONS
1
POWER SWITCH
Power on/off
2
POWER LIGHT
Lights when power on
3
INTENSITY
Controls brightness of display
4
FOCUS
After obtaining appropriate brightness with INTENSITY,
adjust FOCUS for clearest line
5
CALIBRATION
Provide symmetric square wave for 0.5V range,
frequency=1KHz. Used for adjusting 10:1 Capacitor and
adjusting the vertical & horizontal sensitivity.
6
TIME/DIV
Selects the sweep rate
7
Horizontal
POSITION
Horizontal positioning control of trace on the screen
8
HORIZONTAL
VA R
Provides continuously variable sweep rate, turn clock wise
to the end is the calibrating position
9
LEVEL
Control signal trigger to sweep at certain level
10
+/-
TV
+: Triggering occurs when trigger signal crosses trigger
level in a positive-going direction.
-: Triggering occurs when trigger signal crosses trigger
level in a negative-going direction
TV: used to show TV signals
11
AUTO/NORM
EXT/X: X-Y
AUTO : a single trace shown on screen even no signal.
Automatically reverts to triggered sweep
operation when adequate triggered signal is
present. Needs to adjust the Level.
NORM: No trace on screen if no signal. Trace is only
generated when adequate trigger signal is present
EXT/X: X-Y switch
12
INT/EXT/LINE
Switch to select the Trigger Source INT/EXT/LINE
13
Ext. Trig Input
Terminal
When switching [11] to EXT/X, it’s X-Y input terminal;
When switching [12] to EXT, it’s Ext. Trig. Input terminal.
14
ATT
Continuously adjusting X-Y mode sensitivity, turn
clockwise to obtain the highest sensitivity
15
VOLTS/DIV
Adjusting sensitivity of vertical system
16
Vertical POSITION
Control vertical position of trace on the screen
17
VERTICAL VAR
Continuously adjusting the sensitivity of vertical system,
turn clockwise to the end is the calibration position
18
coupling options
(AC⊥DC)
Selects input coupling options
19
INPUT
Vertical input terminal
20
POWER INPUT
CONNECTOR
AND FUSE
power input connector (refer to the rear panel for voltage)
110V±10% , 220 V ±10%;