Counter Description (Service Group G) - HP 3585A Service Manual

Model 3585A
6·29 . COUNTER D ESCRIPTI O N (Service Group G)
The A46, Counter, board is made up of a ripple counter whose output (carry) sets bits of the
24-bit counter . When the counting is through, the results in the 24-bit counter is latched onto
the IOD bus by a set of data latches . The remaining circuits on this board are for the control
logic and for signal conditioning .
3 5 0 K H z
I F
l O M H z
R E F E R E N C E -- -- -- -- -- -4- -- -- --+- -- --+- -- -- -- -- -- -'
I N P U T
S C H E MA T I C D RAW I N G
F O R T H E
CAN B E F O U N D
N O T E
M6 C
N U M B E R
B OARD I S AND
IN V O L U M E T W O .
1 / 0
F R OM
B OA R D
Figure 6· 1 7 . Counter Block D iagram
Scans by ART EK MEDIA =>
Circuit Functional Descriptions
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1 00
TO P R O C E S S O R
D A T A
24
B U S
L A T C H E S
B I T
C O U N T E R
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3 5 8 5 "-6 - 1 7
6-4 1 /6-42