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Channel Numbers,
Ranges, and Lists
34 HP E1476A Multiplexer Setup
Command
Module
Figure 1-14. Card Numbers in a Multiple-module Switch
The E1476A Multiplexer channel numbers are 00 through 63. The channels
can be addressed using channel numbers or channel ranges. For a single-
module switchbox, channel ranges can span across the channels. For
multiple-module switchboxes, channel ranges can span across the channels
of all modules.
Use commas (,) to form a channel list or use a colon (:) to form a channel
range. Only valid channels can be accessed in a channel list or channel
range. Also, the channel list or channel range must be from a lower channel
number to a higher channel number. For example,
acceptable, but
CLOS(@215:100)
Using the channel range
channels to be scanned except the tree relays which are channels 90 through
94. These are not typical scan channels and therefore are not included in a
scan list. You can however, include channel 93 in a scan list, e.g.
(@100:193)
when making a four-wire resistance measurement. The only
restriction is that
SCAN:MODE
channel 93, which is the voltage sense. The current source channel is 94 and
is automatically switched.
Below are some SCPI commands and a description of their effect on channel
lists and ranges.
Channel Lists:
CLOS(@100,112)
OPEN(@203,210)
CARD NUMBER 02
CARD NUMBER 03
generates an error.
(@n00:n99)
with the
SCAN
must be
(four-wire resistance) for
FRES
Close channels 00 and 12 on
card 01.
Open channels 03 and 10 on
card 02.
CARD NUMBER 01
Multiplexer Number 1
Logical Address = 112
Secondary Address = 14
Multiplexer Number 2
Logical Address = 113
Multiplexer Number 3
Logical Address = 114
CLOS(@100:215)
is
command causes all
Chapter 1
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