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Chapter 3
Using the HP E1351A/53A FET Multiplexer
Modules
Using This Chapter
This chapter uses some typical examples to show how to use the
16-Channel FET and 16-Channel Thermocouple FET Multiplexer Modules.
Refer to Chapter 4, “Understanding the HP E1351A/53A FET
Multiplexers” for further information. This chapter contains the following
sections:
• Selecting Channels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 29
• Multiplexer Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 31
• Connecting Switchbox Channels to Direct
Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 32
• Connecting Switchbox Channels to Tree Terminals for
Making Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . Page 34
• Scanning a Range of Switchbox Channels . . . . . . . . . . . . . . Page 36
• Downloading a Scan List. . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 39
• Scanning a Switchbox without a Downloaded
Scan List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 40
• Scanning a Switchbox with a Downloaded
Scan List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 41
• Scanning Voltmeter Configuration with
HP E1326B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 42
• Measuring Temperature Using Thermocouples
(HP E1353A Module only) . . . . . . . . . . . . . . . . . . . . . . Page 43
Selecting Channels
Individual channels within a module or multiple-module instrument are
selected with the
SCAN <channel_list> or OPEN and CLOSe
<
channel_list> commands. OPEN and CLOSe <channel_list> immediately
opens/closes the specified channel. The
SCAN <channel_list> command
creates a scanning list which can be downloaded into RAM on each module.
The
INITiate command closes the first channel on the scan list, and the
selected trigger mode advances the rest of the channels.
The FET Multiplexer Module uses break-before-make logic so that a closed
channel is opened before the next channel is closed. Only one channel can
be closed at any given time on the FET multiplexer. The only exception is
in
SCAN:MODE FRES (4-wire resistance measurements). You can,
however, have a channel closed on two different modules in the same
instrument.
Chapter 3 Using the HP E1351A/53A FET Multiplexer Modules 29