Philips PM3219/01 Notice D'emploi page 34

3.4.
3.4.1.
3.4.2.
3.4.2.1.
3.4.2.2.
3.4.2.3.
37
DETAILED OPERATING INFORMATION
Preliminary Settings and Connections
Before switching on, ensure that the oscilloscope has-been correctly installed in accordance with the
instructions given in Section 2, and that the various precautions outlined have been observed.
Storage Operation
Normal storage function
For normal storage of signals, proceed as follows:
— Depress MEMORY OFF.
— Connect an input signal to the oscilloscope.
— Set AMPL/D!V and POSITION controls to a suitable position.
— Suitably adjust the TIME/DIV control.
— Set INTENS to a suitable position.
— Adjust FOCUS for minimum spot size.
— Depress SINGLE pushbutton.
— Release MEMORY OFF.
— Release READ/WRITE to WRITE position.
— Depress ERASE pushbutton once.
On receipt of a trigger pulse, the input signal is stored.
The INTENS controls should be adjusted for optimum display.
For fast input signals, which are characteristically of low intensity, the MAX WRITE position of the PERSIS-
TENCE control provides a facility for clearer display; i.e., signals captured in the variable persistence mode
are better displayed with the potentiometer at MAX WRITE.
Auto erase function
To obtain the automatic erase facility:
— Pull the PULL FOR AUTO ERASE control.
— Set the VIEW TIME to a suitable position (range of setting lies approximately between 1 and 10 seconds).
The auto erase function can be shown graphically as follows:
WAIT TIME VIEW TIME WAIT TIME
MATS28E
AUTO TRIGGER ] AUTO TRIGGER
ERASE ERASE
Fig. 19.
If manual ERASE is used, it overrules the other functions and the circuit is set to the position immediately
after auto erase.
Read mode
— Select the READ position (READ/WRITE switch depressed). The captured signal is stored and displayed.
Erasure is not possible in this mode. :
— Adjust the stored signal for optimum intensity with the BRIGHTNESS control.
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