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10
1.2.7.
Options
TTL triggering
Internal
External
ECL triggering
Internal
NOTE: Insteadof TV triggering,you canmodify the instrument for TTL or ECL triggering (seeservice
manual), If modified the main time-base triggering is automatically set for TTL or ECL triggering.
The level control is not operative then.
Sweep out MTB
Output voltage
Gate out MTB
Output voltage
Gate
out DTB
Output
voltage
t2
Fig. 1.2. Rise time measurement t
Rise-time of oscilloscope (s) =
NOTE: Bearin mind that inaccuraciesof CRTandtime.base and rise-timeof generator(measured with an
input pulse with a rise-time < Ins) influence this measurement.
Rise-time measurement of a signal applied to the vertical inputs:
Bear in mind that the rise-time measuredon the oscilloscope screen is influenced by the rise-time of the
oscilloscope according to the formula:
T
(measured)
=
The measuring fault < 3%, if the rise-timeof the input pulseis
MAT
861
= t (90%)—tl (10%)(general formula)
0.35
bandwidth
(Hz) of the instrument
(T (signal) + (TR(oscilloscope)
The correct TTL level is obtained with the AMPL/DIV
position 2V/div.
The correct
TTL level is obtained
probe.
The correct ECL level is obtained with the AMPL/DIV
position 0.5V/div.
From
— 1.8V
to + 3.8V.
Output short-circuit
protected.
At TTL level: "high" during MTB sweep.
Output short-circuit
protected.
At TTL level: "high"
during DTB sweep.
Output short-circuit protected.
2
4 timesthe rise-timeof the oscilloscope.
in
via a 10 : I attenuator
in
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