5-6
IM 701310-01E
Explanation
Selecting the Input Coupling
You can select the method of coupling the input signal to the vertical control circuit in the
following ways.
AC Acquires and displays only the AC component of the input signal.
DC Acquiresanddisplaysallthecomponents(DCandAC)oftheinputsignal(1MΩinput).
This can only be selected when measuring voltage.
GND
Checks the ground level.
DC50 Acquiresanddisplaysallthecomponents(DCandAC)
oftheinputsignal(50Ωinput).
Input Coupling and Frequency Characteristics
The following shows the frequency characteristics when AC or DC are selected.
Note that when AC is selected, low frequency signals or signal components are not
acquired (as shown in the figure below).
0 dB
– 3 dB
–3 dB attenuation point
Attenuation
0 dB
– 3 dB
–3 dB attenuation point
Attenuation
Lower –3 dB attenuation point when connected by AC
Input frequency
Input frequency
When AC is selected When DC is selected
CAUTION
• The maximum input voltage for the 1-M
W
input is 150 Vrms when the frequency
is 1 kHz or less. Applying a voltage exceeding this maximum can damage the
input section. If the frequency is above 1 kHz, the input section may be damaged
even when the voltage is below the values specified above.
• The maximum input voltage for the 50-
W
input is 5 Vrms and 10 Vpeak. Applying
a voltage exceeding either of these voltages can damage the input section.
5.4 Setting the Input Coupling
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