HP 35601A Operating And Service Manual page 115

Service
Model 35601A
STARTUP
_ i _
Q , - 1
Q
2
- 1
DAV
DAV = 'DAV ('ATN' + LADS)
U33 is positive
edge triggered
'RFD' = 1
'DAC = 0
'RFD' = 0
'DAC = 0
RFD = 0 _
DAC = Q
2
» M
2
CL = 0
Q
2
= 1
Figure 6 26. Flowchart for A1 Handshake Circuitry
6-74