Battery Operation - Hitachi V-209 Operation Manual

quency signal (30Hz or less).
TV(V) This setting is used when observing the enure
vertical picture of television signal.
Th1s setting is used when observing the entire
TV(H)
horizontal picture of television signal.
(NOTE) Both TV V and TV H synchronize only when
the synchronizmg signal is negative.
(5)
Miscellaneous
@
EXT BLANK connector
Input terminal for brightness modulation. It is of the
coupling. The brightness is reduced with a positive signal
and increases with a negative signal.
@
CAL O.SV tip
Output terminal of calibration square wave of about
I
kHz and O.SV. It has a tip terminal. It is used to cali­
brate the probe combination.
@
GND terminal
Earth terminal of the oscilloscope.

5. BATTERY OPERATION

Operation of battery pack AD-
I)
Set the Power source select switch
Power mode select switch
2)
Tum on the POWER switch
to operate on the power from the AD-:!09.
The continuous operation time is one hour and half. If
the battery is operated 1n excess of this period, the ter­
minal voltage will decrease sharply and the battery will
be in the over-discharged condition.
In this model, an alarm circuit will be activated before
the over-discharging and the POWER lamp
DC
Oash. In this case, charge the battery immediately.
Note: When the alarm c1rcuit
age is lowered down to IO.SV, the power of the
V-209 is off automatically to prevent the over­
discharge of the AD-209.
The selection of the AD- 209 and an external
source is made by the external DC input con­
nector
209
(j)
to DC and the
@
to DC OP.
CD.
Then the V-:!09 starts
energized and the volt­
IS
®
.
G)
starts to
DC
15