HP 8901B Service Manual page 195

Model 8901B
Service
L L H
1
; D x
AND GATE
L H L
L L
n b l e 8A-6. Schematic Diagram Notes (9
of
1
I)
I
FFl T l T
OR GATE
NAND GATE
B
OR GATE WITH
H H
INVERTED INPUTS
L H H
NOR GATE
B
AND GATE WITH
INVERTED INPUTS
L
H
L
L L
H
EXCLUSIVE-OR
GATE
OPEN COLLECTOR
OUTPUTS (TTL)
+V
INVERTER
OPEN EMlllER
OUTPUTS (ECL)
EXTERNAL
' , *
RES
ISTO R
PULL-DOWN
l v
8A-18