Fluke CombiScope PM3370B User Manual page 93

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CURSORS READOUT
First, the reference distance between the two cursors is set. This then is set to
100 % (360 ) by pressing the T=100 % (360 ) softkey. Changing the distance
between the cursors now results in a % ( ) reading of the reference.
- Press the softkey next to T until T-ratio (phase) is intensified.
- Set the time cursors to be exactly one signal period apart.
- Press the softkey next to T=100% (360 ).
In the cursor readout line of the screen, the value for T is now ' T=100%'
( T=360 )
Observe that the 100% (360 ) reference does not change when the TRACK
control is turned.
100%
ch1: T=100%
TRACK
- Adjust the cursors to a distance of half a signal period.
Now the T in the readout area will read ' T= 50%' ( T=180 )
This is the way to use the cursors for duty cycle measurements.
V=600mV
T=100%
HOW TO USE THE INSTRUMENT
T-RATIO/PHASE
50%
ch1: T=50%
TRACK
V=600mV
ST6733