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Multiplexer Channel
Addresses
Connecting the
Multiplexers
22
Getting Started with the Strain Gage Multiplexers
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The strain gage multiplexer channels within the scanning multimeter and
switchbox are specified in the form:
(@ccnn)
(@ccnn,ccnn)
(@ccnn:ccnn)
(@ccnn:ccnn,ccnn:ccnn)
where "
" is the card number and "
cc
example:
(@100:107)
specifies channels 0 through 7 on (multiplexer) card number 1. The leading 0
in the card number can be omitted.
Chapter 3 contains example programs showing how a channel (and channel
list) is specified in a strain measurement command. The strain measurement
commands are described in detail in Chapter 5.
In scanning multimeter and switchbox instruments, the multiplexers are
connected to the multimeter and to other multiplexers with an analog bus
cable, or with an analog bus cable and a digital bus cable (Figure 1-6). The
cables used are determined as follows:
1. If the scanning multimeter or switchbox uses relay (strain gage)
multiplexers only, the analog bus cable is used.
2. If the scanning multimeter or switchbox uses FET (strain gage)
multiplexers only, the analog bus cable and the digital bus cable
are used.
3. If the scanning multimeter or switchbox uses a combination of relay
and FET multiplexers, only the analog bus cable is used.
Figure 1-6. Connecting the Analog and Digital Bus Cables
Descriptions of the analog bus and digital bus cables are found in the
HP E1326B/E1411B Multimeter Manual.
single channel
-
multiple channels
-
sequential channels
-
-
groups of sequential channels
" is the channel number. For
nn
Chapter 1
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