Watkins-Johnson Company WJ-8718-19/FE Instruction Manual page 139

CIRCUIT DESCRIPTION
-
I KHZ
REFERENCE-
FREQUENCY
lOj CK
U4 E
-N
PHASE
DETECTOR
U9A.U9B
PRESETS
o o
:_j:
©0
^101 CK
RC U3 E
PRESETS
o o o o
H-iol CK
RC U2 E
-N
; i u
®@
END OF CYCLE DETECTOR
U5A,U5B,U6A,U6B,U6C
U7A,U7B,U8A,U8B
WJ-8718-19/FE HF RECEIVER
PRESETS
9 9 90
Eg
RC Ul
-tN
CK
PROGRAMMABLE
DIVIDER
1
1
- v w
^h
n •
* —•
VCO
0
DIVIDER
-r 10
UIO
» BFO
OUTPUT
Figure 3-27. BFO Functional Block Diagram
3-56