9
Selection of coupling means of input signal
The selected input coupling will determine what part of signal is allowed to be transmitted to the scopemeter.
The coupling means include DC/AC types.
DC coupling
The AC and DC part of signal is allowed pass through.
AC coupling
The DC part of signal is blocked but the dynamic AC part is allowed to pass through.
Time base control
Under the main option menu of scopemeter, press F1 button to enter into the sub-option menu of scanning time
base control:
Back
Adjustment of scanning time base
Horizontal position
EXIT
◄
►
POS
F1
F2
F3
F4
1. Press F1 button (EXIT) to exit the sub-option menu of time base setting and back to the main option menu.
2. Press F2 button (◄) and F3 button (►) to adjust the time base (t /div).
3. Press F4 button (POS) to enter into the sub-option menu of adjustment of triggering position (horizontal position)
Instructions!
• When measuring a signal whose frequency is unknown, user has to try to collect the waveform
from the fastest time base and then gradually select the slower time base until the signal can be
displayed correctly. Otherwise, due to “aliasing effect”, waveform may fail to correctly reflect the
actual situation of the signal.
• There are several ways to avoid aliasing effect: adjust the time base or press
“
R
”
button.