Racal Instruments 9901 Maintenance Manual page 14

8
,
TIME
INTERVAL SINGLE
& DOUBLE
LINE
9.
Input
Channel:
Time
Range:
Clock
Units:
Single
Line:
Channel
B,
Double
Line: Start
Channel
B:
Stop
Channel A.
4
100
ns to 10
s
(2.8 hours approximately).
100
ns to 10 ms.
Coupling:
DC
Start/Stop
Signals:
Electrical or
contact
Manual
Start/Stop:
Trigger Slope
Selection:
Accuracy:
Bounce
Protection:
By
single
push button on
fromt panel.
Electrical.
Positive or negative
slopes
can be
selected on
both
Start
and
Stop signals.
Contact
.
Opening
or closure
can be
selected
on
both
Start
and
Stop
signals.
For trigger
error see
page Tech.
Spec.
(4).
±
1
count ±
trigger error ± frequency
standard
accuracy.
A
10 ms
dead
time
is
automatically Included
when
contact operation
is
selected.
TIME INTERVAL
AVERAGING
SINGLE
& DOUBLE
LINE
Input Channel:
Time
Range:
Single
Line:
Channel
B.
Double
Line: Start Channel
B:
Stop
Channel A.
1
50
ns to
0
. 1
s
Dead
Time between
Intervals:
Clock
Unit:
Time
Intervals
Averaged:
Accuracy:
150
ns
minimum.
100
ns.
5
_
1
to 10
in
decade
multiples.
± Frequency
standard accuracy ±
system
error
± averaging
error.
System
error:
10
ns per input channel.
This
is
the difference
in
delays between
start
and
stop
signals
and
can be minimised by matching
externally.
9901 Vol.2
Tech
.
Spec.
(3)