Elenco 30MHz Dual Trace Uživatelský manuál stáhnout pdf (Strana 47)

OPERATING INSTRUCTIONS

HOLD OFF Control

Controls hold-off time between sweep signals to obtain stable display when

triggering a periodic signal. The control hold time ranges from 1 to 5 times time base.

Refer to Fig.3(A): shows a case for HOLD OFF knob at the NORM position. Various

different waveforms are overlapped on the screen, making the signal observation

unsuccessful.

Refer to Fig.3(B): show a case in witch the undesirable portion of the signal is held

off.

The same waveforms are displayed on the screen without overlapping.

In such a case, the sweep can be stable synchronized to the HOLD OFF time (sweep

pause time) of the sweep waveform.

TIME BASE Control

1. Sweep TIME/DIV Control

Set the sweep TIME/DIV control to display the desired number of cycles of the

waveform. If there are too many cycles displayed for good resolution, switch to

faster sweep time. If only a line is displayed, try a slower sweep time. When the

sweep time is faster than the waveform being observed, only part of it will be

displayed, which may appear as a straight line for a square wave or pulse

waveform.

Adjusting

the HOLD OFF

time

Sweep

Waveform

A complex waveform

(Digital signal)

Cycle

Heavy parts are display

Fig.3

(A)

(B)

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 67 68

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Elenco 30MHz Dual Trace Uživatelský manuál Strana 47