19. F O C U S
Spot focus control to obtain optimum waveform
according to brightness.
20. EXT TRIG
External triggering terminal. For external triggering,
external triggering voltage (more than 1Vp-p) should
be applied, with SOURCE switch (21) set to EXT.
2 1 . S O U R C E
Three-position switch to select triggering voltages for
CH1, CH2 and EXT.
C H 1 : Sweep is triggered by CH1 vertical input
waveform.
Both sweeps are triggered by the same source
in dual(2-channel) trace operation.
C H 2 : Sweep is triggered by CH2 vertical input
waveform.
Both sweeps are triggered by the same source
in dual (2-channel) trace operation.
EXT: Sweep is triggered by an external signal applied
to EXT TRIG (20) terminal.
22.
S Y N C
Sync separator switch. It picks up sync signal
component in TV video signal and applied to trigger
circuit for complete synchronization of video signal be-
ing viewed.
N O R M ±: Used for viewing general waveforms. In
this position, TV sync separator circuit is not
connected.
At " - ) - " polarity, sweep is effected by " - ) - " slope
and, at " —" polarity, by " —" slope.
TV ±: Used for viewing waveforms with TV video
signal synchronized with sync signal. TVV and
TVH are automatically selected for sweep times
of 0.5s to 0.1ms and 5 0 M S to 0 . 5 M S of S W E E P
TIME/DIV rotary switch, respectively, and are
synchronized with vertical and horizontal sync
signals.
Polarity should be set to match that of video
signal as shown in the illustration.
S Y N C SWITQH
T V (+)
S Y N C SWITCH
T V ( - )
23. LEVEL
Triggering level control adjusts sync phase to deter-
mine the starting point of sweep on the slope of
trigger signal waveform.
P U L L A U T O :
By pulling LEVEL VR toward you, auto-sweep is
effected; the sweep is set in free-running state even
when no trigger input signal is applied, with fly-back
line displayed on CRT.
With trigger signal, trigger-sweep is effected where
sync level is adjustable. When the sync level exceeds
the limit, the sweep is set in free-running state.
24. <> POSITION, PULL X5 MAG
Horizontal position adjuster to shift waveform to any
desired horizontal position. A right turn of the adjuster
will shift the waveform to right, and vice versa,
pull
X
5
M A G .
Sweep magnifier switch. By pulling the knob toward
you, waveform is magnified to 5 times in left and right
directions. Brightness is slightly decreased.
25. S W E E P T I M E / D I V
Horizontal sweep time selector. It selects sweep
times of 0.5MS to 0.5s in 19 steps. X - Y operation is
possible by turning the knob fully clockwise.
Changeover between CHOP, ALT, TVV and TVH is
also accomplished automatically by this selector.
When V A R I A B L E (26) is turned fully clockwise,
calibrated reading is obtained which is the sweep time
per "div".
26. V A R I A B L E
Used for fine adjustment of sweep time. Continuous
adjustment between 19 steps of S W E E P TIME/DIV
(25) is possible. Sweep time is calibrated at the ex-
treme clockwise position (CAL).
27. C A L
Calibration voltage terminal. Calibration voltage is
1Vp-p of about 1kHz square wave.
28. A C VOLTAGE S E L E C T O R
The C S - 1 5 6 0 A II may be operated from 100V, 120V,
220V, 240V, putting the AC VOLTAGE SELECTOR in
the place ofanother.
29. F U S E HOLDER
For 100 <~ 120V operation a 0.7 ampere fuse should
be used.
For 2 2 0 ~ 240V operation a 0.3 ampere fuse should
be used.
30. POWER CONNECTOR
For connection of the supplied AC power cord.
3 1 . Z AXIS INPUT
Intensity (brightness) modulation terminal. Intensity is
modulated at voltages of 20Vp-p or higher. When
modulation is not needed, the supplied shorting pin
must be plugged in.
32. C O R D R E E L
Wind power cord when the oscilloscope is to be
carried or stored. They also serve as a stand when the
oscilloscope is used in upright position.
Fig. 1
6
