2-4
IM 701730-01E
2.2 Vertical and Horizontal Axes
Input Coupling <For the setup procedure, see section 5.4>
If you wish to observe just the amplitude of an AC signal, it is best to remove the DC
component from the input signal. On the other hand, there are times when you wish to
check the ground level or observe the entire input signal (both the DC and AC
components). In these cases, you can change the input coupling setting. By changing
the input coupling, the method used to input the signal to the vertical control circuit
(voltage axis) is switched.
The input coupling can be set to one of the following.
AC1 M
Ω
The input signal is coupled to the attenuator of the vertical control circuit through a
capacitor. This setting is used when you wish to observe only the amplitude of the AC
signal, eliminating the DC component from the input signal.
Vertical
control
circuit
Input
terminal
1 M
Ω
DC1 M
Ω
The input signal is directly coupled to the attenuator of the vertical control circuit. Use
this setting if you wish to observe the entire input signal (DC component and AC
component).
Vertical
control
circuit
1 M
Ω
Input
terminal
DC50
Ω
This setting is similar to DC1 M
Ω
described above except the input impedance is 50
Ω
.
Use caution because the allowable maximum input voltage is decreased.
Vertical
control
circuit
50
Ω
Input
terminal
GND
The input signal is coupled to the ground, not to the attenuator of the vertical control
circuit. You can use this setting to check the ground level on the screen.
Vertical
control
circuit
Input
terminal
