Racal Instruments 9916 Workshop Manual page 18

Uhf frequency meter
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DATA OUTPUT CONNECTIONS
Al.
Data and Command information is available via a 28-way edge connector accessible
by removing a cover on the rear panel. The facil ities and pin connections are listed
in Table
1.
TABLE
1
Data Output Connector
-
Pin
Faci
I
ity
Pin
Facil
ity
1
-5'1
nominal
A
OV
2
+5V
nominal
B
Overflow
\
3
Key Way
C
Key Way
I
-
-
4
4
(BCD)
0
1
(BCD)
-
"2
5
8 (BCD)
E
(BCD)
6
External Hold Input
F
10kHz
Sync.
I
7
External Reset Input
H
Main Gate
1
8
Not Used
J
Not Used
I
9
-
)
K
-
)
Time Base
c
z
1
-
Logic
11'
-
)
10
b
)
L
y
Information
I
I
11
-
)
M
-
)
(See Table
2)
a
x
I
- -
12
R
(0)
N
Not Used
,
,.13
Hold/Reset
P
Not Used
,.
,4
Prescale
R
Not Used
NOTES
1:
All facil ities are outputs except pins
6
and
7_
2:
The Overflow level on pin B is
0
sta.tic indication.
t;
3:
The Prescale information on pin
14
is a permanent
'1'
level to indicate
that no correction
is
requ.ired
extern~lly
to the outputs as the decimal
point informat ion is automatically corrected on change of function
and channel.
9916 Vol. 2
Tech. Spec. (8)

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