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