Measurement Computing Parallel488 - Manual (Page 30)

Section 4 IEEE to Parallel Operation
4.6
4.4.8 Untalk (UNT)
UNT places the Parallel488 in the Talker Idle State.
4.5 IEEE Address Selection
SW1-1 through SW1-5 select the IEEE bus address of the Parallel488 when in
the IEEE to Parallel mode. The address is selected by simple binary weighting with SW1-
1 being the least significant bit and SW1-5 the most significant. The following figure
shows the IEEE address of the Parallel488 set to 10.
SW1 View for IEEE Address Selection
OPEN
1 2 3 4 5 6 7 8
1
0 DOT
Switch
Side
View
0 x 16
1 x 8
0 x 4
1 x 2
0 x 1 = 0
= 8
= 0
= 2
= 0
+
IEEE Address = 10
4.5.1 Listen Only Mode
Listen Only is a special type of IEEE to Parallel operation. In the Listen
Only mode the Parallel488 accepts all data transmitted on the bus and transfers it
out its parallel port. The Parallel488 is set to Listen Only mode by setting its
address to 31 (switches SW1-1 through SW1-5 all open).