Tektronix DM505 Instruction Manual page 63

'ONVERTER
fl
BLOCK DIAGRAM
PARALLEL
BCD OUTPUT DIGIT STROBES
m
0 1 0 2 0 3 w4
\
MULTl PLEXER
-12 V
CLOCK IN
AZ
LTER C1103
0
CKT
SWITCH STATES ARE
FOR A
LOGIC "0" AT U/D AND M/Z INPUTS.