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HOW TO USE THE INSTRUMENT

4.5 HORIZONTAL DEFLECTION AND TRIGGERING

Before starting with the horizontal deflection functions, you must set the instrument to a predefined state to create a correct start situation.

STANDARD SETTING

-Simultaneously press the STATUS and TEXT OFF keys.

-Connect the Probe Adjust signal to channel 1.

The Probe Adjust signal, now supplied to the input, is a square wave with a lower level of 0V and a top level of 600 mV.

-Press AUTOSET.

TIMEBASE

TIME/DIV

TIME/DIV

4 periods/cycles of the square wave are displayed on the screen.

ST6839

-Press the ’s’ (left) key of the MainTB TIME/DIV key pair a few times.

The more you press the left (’s’) key, the slower the timebase will run. This results in the number of displayed periods/cycles of the input signal to increase.

-Press the ’ns’ (right) key of the MainTB TIME/DIV key pair a few times.

The number of displayed periods/cycles decreases as the timebase speed increases.

Observe that the timebase speeds are adjustable in steps following a 1-2-5 sequence.

MTB 500μs

TIME/DIV

MTB 100μs

ST6709

-Set the timebase to 200 μs.

The signal is displayed with four periods on the screen.

Page 67
Image 67
Fluke PM3370B user manual Horizontal Deflection and Triggering, Timebase TIME/DIV, Set the timebase to 200 μs