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4 - 48 HOW TO USE THE INSTRUMENT
CURSORS READOUT ∆T-RATIO/PHASE
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.
- 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.
50%
ch1: ∆T=100%
ch1: ∆T=50%
TRACK
∆V=600mV
∆V=600mV
∆T=100%
100%
∆
TRACK
∆
ST6733