YOKOGAWA DL7440 User Manual

5-7
IM 701450-01E
5
Vertical and Horizontal Axes
Explanation
Selecting the Input Coupling
You can select the method of coupling the input signal to the vertical control circuit.
AC1MΩ
Acquires and displays only the AC component of the input signal.
DC1MΩ
Acquires and displays all the components (DC and AC) of the input signal (1-MΩ input).
DC50Ω
Acquires and displays all the components (DC and AC) of the input signal (50-Ω input).
GND
Checks the ground level.
Input Coupling and Frequency Characteristics
Below are the frequency characteristics for the cases when AC1MΩ, DC50Ω, and
DC1MΩ are selected. Note that when AC1MΩ is selected, low frequency signals or
signal components are not acquired (as shown in the figure below).
0 dB
–3 dB
500 MHz
When DC50Ω is selected
400 MHz
When DC1MΩ is selected
Attenuation
0 dB
–3 dB
400MHz
Attenuation
10 Hz or less when using the 1:1 probe
1 Hz or less when using the 10:1 probe
Input frequency
Input frequency
When AC1MΩ is selected
When DC50Ω or DC1MΩ is selected
CAUTION
The maximum input voltage when the frequency is less than or equal to 1 kHz is
400 V (DC+ACpeak) for 1-MΩ input and 5 Vrms or 10 Vpeak for 50-Ω input.
Applying a voltage exceeding either of the two values can damage the input
section. If the frequency is above 1 kHz, damage may occur even when the
voltage is below this value.
5.4 Setting the Input Coupling

YOKOGAWA DL7440 Specifications

General

Brand	YOKOGAWA
Model	DL7440
Category	Test Equipment
Language	English