Measurement Computing Serial488A - Manual (Page 58)

4.9
4.6.7 Unlisten (UNL)
UNL places the Serial488A in the Listener Idle State.
4.6.8 Untalk (UNT)
UNT places the Serial488A in the Talker Idle State.
4.7 IEEE Address Selection
SW3-1 through SW3-5 select the IEEE bus address of the Serial488A when in
the IEEE Peripheral mode. The address is selected by simple binary weighting with
SW3-1 being the least significant bit and SW3-5 the most significant. The following
figure shows the IEEE address of the Serial488A set to 10.
SW3 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
4.7.1 Listen Only Mode
Listen Only is a special type of Peripheral operation. In the Listen
Only mode the Serial488A accepts all data transmitted on the bus and
transfers it out its serial port. The Serial488A is set to Listen Only mode
by setting its address to 31 (switches SW3-1 through SW3-5 all open).