Channel Numbering And Addressing - HP 82479A Owner's Manual

Getting Started
2.9 CHANNEL NUMBERING AND ADDRESSING
Throughout this manual, the term "channel" will be used to refer to either a relay on a multiplexer
assembly or an input/output bit on a digitial I/O assembly. Channel numbers are repeated on each
multiplexer assembly (numbers 0-9) and digital I/O assembly (numbers 0-7). Channel addresses are
determined by which HP 3421A slot the option assembly is plugged into plus the channel number.
Channel 4 for an assembly in slot 2 would be addressed as 24. The following table shows the addressing
scheme for the three different slots.
Channel Channel Address if
Number Assembly is in Slot #:
Slot 0 Slot 1 Slot 2
0 00 10 20
1 01 1 21
2 02 12 22
3 03 13 23
4 04 14 24
5 05 15 25
6 06 16 26
7 07 17 27
8+ 08 18 28
OH 09 19 29
# The digital I/O assemblies contain only channels 0-7.
2-8