Alternate Mode, each the traces performs full sweep the screen, alternately..
In all cases, alternate triggering enables stable display the traces.OSCILLOSCOPES
Theoretical Introduction
Analogue oscilloscope
DEFINITION:
■ Analogue oscilloscope
This instrument for "qualitative analysis" which can
be used view the waveform periodic electrical
signal function time.
HORIZONTAL DEFLECTION:
■ Time base (TB):
This involves the circuits the oscilloscope which control the sweep the screen.Y4) can displayed with single electron
beam.
The choice the "time base coefficient" allows display the signals over appropriate duration
■ Alternate Chop display modes
Multiplexing the channels means that several channels (Y1, Y2, .
■ Rise time (rt):
For square signal (sheer edges), this the time required for the rising edge pass from 10% 90% the "peak-
to-peak" amplitude.
Choosing your analogue oscilloscope
Block diagram oscilloscope
Y input ugnal
External trigger
Triggering Time base
Xinputtignal
Cathode ray tube
VERTICAL DEFLECTION:
■ Deflection coefficient:
This defined the minimum amplitude (sensitivity) and maximum amplitude accepted the input. For low speeds,
portions the trace are cut for display during given sweep the screen: this called Chop Mode
■ Trigger
This circuit which allows horizontal sweeps and determines the starting point the signal.
■ Bandwidth (BW):
This the maximum frequency range accepted the oscilloscope (in MHz).
umlmx-
.
The "trigger level" the voltage level which must reached the signal observed order perform sweep.
■ function
This function that allows display channel (Y1) function another channel (Y2); the time base then
inoperative.
