105
M2 Scope/Meter
M2 Scope/Meter Operations
Special Selections
The Special settings allow you to alter the way the trace is displayed in order to readily spot signal
anomalies and to compare signals. A short push of the F2, F3, or F4 key activates the indicated
special mode, a long push of the key cancels the special mode.
Figure 8-17
Sample special selections screen with peak capture on
Peak
Pressing the F2 key switches on the peak capture function, which allows you to see very fast
signal transitions or glitches. When peak capture is active, “P1” displays at the top of the screen.
During normal operation, the scope collects just enough data samples to plot a waveform across
the screen. When peak is active the scope samples data at the maximum highest rate, which
collects more data than what is needed to simply construct a waveform across the screen.
Therefore, any signal glitches or fast events are captured.
Invert
Pressing the F3 key inverts, or switches, the polarity of the signal trace so that it appears
upsidedown on the screen. This is typically used to sample amperage or high-voltage signals.
Coupling
Pressing the F4 key switches the input to the meter from DC coupling (default) to AC coupling. In
this mode the average value of the waveform is subtracted so that small signal variations become
apparent. AC coupling blocks the DC portions of an input signal in order to amplify the AC portions
without driving them off of the screen. Use for viewing alternator ripple or fuel pump amperage.
Preset B
F2 (PCI&S)
10 mS
50 Volts
8 Volt
DC
Positive
F3 (LF DS)
50 mS
20 Volts
3 Volt
DC
Positive
F4 (HFDS)
10 mS
20 Volts
3 Volt
DC
Positive
Selection
Position
Timebase
Scale
Trigger
Coupling
Slope
'
'
'
'
&+
'&
P6
7$872
7&+
9
9'LY
7
1FBL
4QFDJBM
$PVQMJOH
*OWFSU
3
Содержание VERDICT
Страница 1: ...User Manual EAZ0063L05G Rev E 5 ...