Iwatsu DS-8814, Operation Manual

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15
Selects the input signal coupling from DC
→
Ground
→
AC.
Coupling
BW
AC coupling (V) : The signal of 10 Hz or below is attenuated and the
DC component is blocked.
This coupling is used to observe the signal while canceling the DC
level.
DC coupling (V)
: All signal frequency components including the DC
component are passed.
GND ( ) : Displays the ground level (0 V).
BW ON/OFF
: Selects ON/OFF using the CH menu. The AC component
of 10 MHz or higher is attenuated when ON is selected.
BW is used to reduce noise of 10 MHz or higher in the signal.
Square wave when
AC is selected
Square wave when
DC is selected
〜 〜
〜 〜
〜
When you observe the signals that ripple or noise occurs like in the power
output, it is better to use Volts than AC coupling.
Turn [OFFSET] knob to
set offset level to − 1 V.
[e.g.]
Observe signal in DC 1 V.
VOLTS/DIV allows noise
component to be observed in
an enlarged view relative to the
center of the screen.
How to use Volts
Caution
Do not apply a voltage exceeding the specified voltage to the input
terminal.
Direct connection:
±400 V (DC+AC peak)
When SS-0130R or equivalent probe is used: ±600 V (DC+AC peak)
[Note] The maximum input voltage is de-rated at a frequency of 1
MHz or higher.