5-2
IM 701510-01E
5.2
Setting the Input Coupling
1.
Press the
INPUT key
corresponding to the channel for which input
coupling is to be selected. The input setting menu will be displayed.
2.
Press the soft key corresponding to the desired coupling type.
3.
When DC is selected, turn the rotary knob to set the desired offset
voltage.
Explanation
Input coupling
The following three types of input coupling are available. The default is “DC”.
AC
Displays only the AC content of the input signal.
DC
Displays both the DC and AC content of the input signal. Only in this case an offset
value can be set. This setting can also be done pressing the KEYBOARD key (refer
to page 4-7).
GND
Used to check the ground level.
Input coupling and frequency characteristic
The frequency characteristic when “AC” or “DC” is selected is shown below.
Note that low-frequency signals and low-frequency contents are not acquired if “AC” is
selected.
0 dB
– 3 dB
150 MHz
Attenuation
0 dB
– 3 dB
150 MHz
Attenuation
less than 10 Hz when using 1:1 probe
less than 1 Hz when using 10:1 probe
Input frequency
Input frequency
When "AC" is selected
When "DC" is selected
Offset voltage and vertical sensitivity
If “DC” is selected, it is possible to cancel the offset voltage for the input signal.
The allowable setting range varies depending on the vertical sensitivity as shown in the
table below.
Vertical sensitivity*
Allowable setting range*
Setting step
10 mV to 500 mV/div
–10 V to
±
10 V
500
µ
V
(for DL1520/DL1520L, 20 mV to 500 mV/div)
1 V to 5 V/div
–100 V to
±
100 V
5 mV
10 V to 50 V/div
–1000 V to
±
1000 V
50 mV
* The above values are given for a probe attenuation of 10:1. They will be 1/10 the value shown
when the attenuation is 1:1, 10 times the value shown when it is 100:1, and 100 times the value
shown when it is 1000:1.
Keys and Procedure
Rotary knob
INPUT key
Soft keys
