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1.4.
3.
2.
Time measurements
(s)
When
the
time
function
is
selected,
the SI contact connects the source to the
voltage attenuator.
After attenuation,
it is
connected
to the
+
input of the
comparator.
In
the
same way,
as
for
frequency measurements the comparator produces output
pulses
when
the
signal
peaks
cross
the
trigger
level
selected.
These
are
passed
direct
to the
microprocessor
and
also
to the
selection gates of
the
interrupt controller.
1.
4. 3. 3.
Trigger
level
measu remen
ts
When
trigger
level
is
selected,
TL1
function switch contact routes the input
signal
to
the
voltage
attenuator
as
for voltage
measurements.
Contact
TL3
connects the attenuated output
via
the
impedance
convertor
to
the
+
input of the
comparator
as
for
frequency measurements.
Switch
K301
is
open
in
the
trigger
level
function.
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