34970A

The Agilent 34970A consists of a three-slot mainframe with a built-in 6 ½ digit DMM. Each channel can be configured independently to

measure one of 11 different functions without the added cost or hassles of signal-conditioning accessories. Choose from eight optional

plug-in modules to create a compact data logger, full-featured data acquisition system or low-cost switching unit. On-module screw-terminal

connections eliminate the need for terminal blocks and a unique relay maintenance feature counts every closure on every switch for easy,

predictable relay maintenance. Our most popular module 34901A features a built-in thermocouple reference and 20 two-wire channels.

Agilent BenchLink Data Logger software is included with the 34970A. BenchLink Data Logger gives you a familiar Microsoft Windows®

interface for test configuration and real-time data display and analysis. Setup and make measurements quickly, export data or use the built-in

graphs to log your results.

Customize your Agilent 34970A with plug-in modules

A complete selection of plug-in modules gives you high-quality measurement, switching, and control capabilities to choose from. Modules
include both low-frequency and RF multiplexers, a matrix switch, a general-purpose switch, and a multifunction module that includes
digital input/output, analog output, and totalizer capabilities. You can mix and match modules to get just the functionality you need right
now—then change or add more channels later as your application grows.

Modules for the 34970A are designed to make your testing easier, faster, and more reliable. Here’s how:

Higher throughput

Our unique architecture incorporates a high-performance microprocessor on each module, offloading the mainframe processor and
minimizing backplane communications for faster throughput.

More channels in less space

Surface mount construction and a highly integrated design minimize the space required for relay drive and interface circuitry. High density
on-module connectors save both board and connector space normally required by a terminal block. We use the latest technology to
squeeze the most out of the remaining board space, giving you up to 40 single-ended channels in roughly the same space used by many
data acquisition system terminal blocks.

Convenient connections

On-module screw-terminal connectors make wiring more convenient. Built-in strain-relief cable routing and cable tie points keep your wiring
secure and safe from accidental tugs and pulls. An internal analog bus routes signals from any of the low-frequency multiplexers directly to
the internal DMM, without the need for external connections.

Use the chart below to help you pinpoint the modules that meet your needs.

Agilent Modules-at-a-Glance Selection Guide
Model Description	Type	Speed (ch/sec)	Max Volts	Max Amps	Bandwidth	Thermal Offset	Comments
34901A 20ch Multiplexer	2-wire armature (4-wire selectable)	60	300 V	1A	10 MHz	< 3 µV	Built-in cold junction reference 2 additional current channels (22 total)
34902A 16 ch Multiplexer	2-wire reed (4-wire selectable)	250	300 V	50 mA	10 MHz	< 6 µV	Built-in cold junction reference
34903A 20 ch Actuator/GPS witch	SPDT/form C	120	300 V	1A	10 MHz	< 3 µV
34904A 4 x 8 Matrix	2-wire armature	120	300 V	1A	10 MHz	< 3 µV
34905A Dual 4 ch RF Mux 50Ω	Common Low (unterminated)	60	42 V	0.7 A	2 GHz	< 6 µV	1 GHz bandwidth through BNC-to-SMB adapter cable
34906A Dual 4 ch RF Mux 75Ω	Common Low (unterminated)	60	42 V	0.7 A	2 GHz	< 6 µV	1 GHz bandwidth through BNC-to-SMB adapter cable
34907A Multifunction Module	Two 8-bit digital I/O ports 26-bit Event Counter Two 16-bit Analog outputs		42 V 42 V ±12 V	400 mA 　 10 mA	100 KHz dc		Open drain Selectable input threshold Max 40 mA total output per frame
34908A 40 ch Single-Ended Mux	1-wire armature	60	300 V	1A	10 MHz	< 3 µV	Built-in cold junction reference No four-wire measurements