HP 8642A Operating Manual page 549

FIG,. &K-IVS
NARROW PULSE 1 2 5 kHz
D I V I D E - B Y - 1 2 , 5 0 0
OR 2 5 , 0 0 0
+ 5 V ( F 3 ) — * * -
R60
Ik
. DIVIDE BY
12,500 SELECT
+5V(f3)
U22A^7
+ 5V (F3)
0 1 7 * 1 4
^
7ET
CTR
CT=0
l*ni
C T R
± ^ C T = 0
=L
1 C64
NC-
>+
Hz
U 1 6 B (NOTE
! _
o
U7D
"If
0
U18C
"HO"-*
NC
ID
NC
10
11
DIV 2
-C
> +
DIV 5
■jiCT CT>
2] 2
NC
NC
A*
DIV 2
DIV 5
>+ CT
NC
NC
NC
U22B
r*
CTR
CT = 0
NC
15j
> +
J_2j
DIV 2
DIV 5
* > + CT
13
NC
■NC
NC
+ 5 V I F 3 )
t i l
U32A
T l 6
I vcT"
p — ^ CT = 0
b
- 1 4 - 1 DIV 2
- X C9
c
DIV 5
0
* > + CT
•NC
■NC
U32B
AAi
3 5 K T
CTR
CT*0
_i2j
DIV 2
13
DIV 5
*>> + CT
11
10
■NC
■NC
COUNT PERDID SELECT
AUDIO
COUNTED SIGNAL SELECT
AUDIO
U36D
9
&
U33D
45 MHZ
U16D
J l
U33C
45V (F3)
C70 X "
14
U33A