Keithley 3930A Service Manual page 22

SECTION 2
Principles of Operation
GPIB
INTERFACE
BLOCK
I-
----
1
GPIB '
I-----:
CONTROL
BLOCK
-------9
i SINGL i
t START IN !
L---,---L
i HOLD IN i
k------d
MKR OUT f
h------d
r------7
i SYNC OUT i
------A+
r-------1
i X i
~.IRIVE
0~3
------
DIGITAL OUT
FOR 3933A
0 Rear panel connector
Figure 2-1.
Overall Block Diagram
2-2