Philips PM3350A - Page 71

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4 APPLICATIONS
CALCULATE-TIME menu
This menu is entered from the CALCULATE menu by pressing the TlME-softkey.
ao AV- At s
fi& bbbbbbbbbbb
1
1
■ 1
• -
h
1
1
PERIOD
WIDTH RISE
RETURN
[= □ IZZI □ □ 1=]
The following selections can be made:
- FREQuency calculates the signal frequency (indicated on the CRT with "f)
provided that at least one signal period Is present between the MAIN cursors.
Only one cycle Is used in the calculation, this Is the nearest to the left cursor.
The LOCATE cursors indicate the signal period over which the calculation is
made.
. PERIOD calculates the duration of one signal period ("T") provided that at least
one signal period is present between the MAIN cursors. Only one cycle Is used
in the calculation, this is the nearest.to the left cursor. The LOCATE cursors
indicate the signal period over which the calculation is made.
- WIDTH calculates the width of the first pulse ("tw‘) seen from the left cursor
provided that there is at least one pulse present between the MAIN cursors.
The LOCATE cursors indicate the signal part over which the calculation Is
made. The pulse may be negative- or positive-going.
- RISE calculates the rise- or fall-time (‘tr") of the first signal slope seen from the
left cursor provided that there is at least one slope between the MAIN cursors.
The 100% level is taken to be the vertical value between the MAIN cursors.
The LOCATE cursors indicate the part of the slope over which the calculation
is made. The rise time is automatically calculated between the 10% and 90%
level of the dV-amplitude or to the nearest sample to these points.
4.3 MENUS AND MEASUflEUENTS