Racal Instruments 9901 Maintenance Manual page 15

Accuracy: (Gsnt'd).
Averaging
Error:
Trigger
error
+
100
ns
y]
(Intervals
Averaged)
10
.
RATIO
One
Frequency
Input:
Other Frequency
Input:
Frequency Range (channel
A)
Trigger
Error:
(ns)
Signal slope at trigger point
(V/ps)
Channel
A
Channel
B
DC
to
50MHz
Frequency Range (channel
B)
DC
to
10
MHz
Accuracy:
±
1
count
±
trigger error
on channel
B (see
above)
Reads:
Frequency
A
x
n
Frequency
B
Multiplier
n:
1
to
10^
in
decade
multiples
TOTALIZING
Input
Channel:
Channel
A
(DC
to
10
MHz).
Maximum
Rate:
1
events per second
.
Pulse
Width:
50
ns
minimum
at trigger points.
Prescaling:
Events
can be prescaled
in
decade
multiples,
(n)
from
1
to
10^.
Reads:
Number
of input events
n
Manual
Start/Stop:
Single push button
on
front
panel
.
Electrical Start/Stop:
By electrical signal
applied
to
Channel
B.
Specification
as for
Time
Interval, single line
working
.
FREQUENCY STANDARD
See
also
Option
04A
and 04B.
Frequency: 5
MHz.
Temperature
Stability:
±
8
parts
in
10^, over temperature range
0°C
to
+55 C.
±3
parts
in
10° over temperature
range +20°C
to
+40°C.
9901 Vol.2
Tech
.
Spec.
(4)