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1693 RLC Digibridge
5.10 Internal Address Settings for
IEEE-488 Interface
Each device (instrument) in a system linked by an
IEEE-488 bus must have its own address (except in
the simple case of a single "talker only" with one
or more "listeners" that are always listening). The
initial setting of address, provided by the factory,
in the interface option of this Digibridge, is 00011.
If the requirements of a system installation make it
necessary to change the Digibridge address, use the
following procedure. Refer to paragraph 2.8.4 for
further comments and a table of possible addresses.
1. Remove the interface option , after removing
the 2 large screws with resilient washers in
the rear panel. See Figure 5-15
CAUTION
Observe the handling precautions
given at the beginning of the Service
Section.
146
Figure 5-15: IEEE-488 interface on the rear panel
2. Find S2 which is located at the end of the
interface option board, about 3 cm (1 in.)
from the TALK switch S1. If S2 is covered,
lift the cover off, exposing the "DIP" switch,
which has 2 rows of 6 tiny square pads with
numbers 1 thru 6 between the rows. The five
device-dependent bits of the address are set
by this switch.
3. Set in the desired bits as follows. To enter
logical 1's, depress pads nearest the end
of the board. To enter logical D's , depress
pads on the other side of the "DIP" switch,
the side marked with a + sign . The address
is read from 5 to 1 (not using 6). Thus, for
example, to set up the address 00011, enter
D's at positions 5, 4, 3; enter L's at positions
2, 1. (This makes the talk address "0" and the
listen address "#".)
4. Replace the interface option assembly in its
former place. Reassembly note: align board
edges carefully with connector and guide
that are inside of instrument, while pushing
interface option into position.
Service and Maintenance
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