Atec Agilent-34970A, Agilent-3499ABC User Manual

34970A

34970A and 3499A/B/C Switch Systems

Which would be best for your application?

Product Overview

3499A/B/C

Module and Mainframe Selection

The 34970A and 3499A/B/C each

have a set of modules that can be

plugged into the mainframes. The

modules offer different types and

total number of switches and/or

measurement inputs and outputs.

You are able to select the modules

that provide the best solution to

the switch and measurement needs

of your specific application.

The 34970A System offers 8 different

plug-in modules. The modules

include both low-frequency and RF

multiplexers, a matrix switch, a

general-purpose switch, and a mul-

tifunction module that includes dig-

ital input/output,

analog output,

and totalizer

capabilities.

The 3499 Family offers a selection of

30 different plug-in modules includ-

ing multiplexer, fiber-optical

multiplexer, general-purpose relay,

matrix, digital I/O, VHF module, RF

module, Microwave module, Form-C

relay, and three multifunction mod-

ules. The 3499A/B/C mainframes

are also compatible with the earlier

generation HP 3488A

Switch/Control Unit

modules (4447xx).

Introduction

The 34970A Data Acquisition/Switch Unit and the 3499A/B/C

Switch/Control System are both very popular Agilent products.

Both systems offer a great solution for switching applications but

they each have differentiating features that will make them better

suited to specific applications. With this general product overview

you should have a better idea of what the 34970A and 3499A/B/C

products are, what they are capable of, and which one is the

best choice for your application. Module and mainframe selection,

user interface and measurements, module connections, and

system cost are the topics covered.

The size of the 34970A and 3499A,

3499B, and 3499C mainframes

enable them to accommodate a

specific number of modules. The

34970A mainframe provides 3 slots

for modules to be installed. The

3499A, 3499B and 3499C differ only

in the number of slots that are avail-

able for modules. The 3499A can

accommodate up to 5 modules. The

3499B can accommodate 2 modules.

The 3499C has been designed with 9

electrical connections for modules,

and enough physical space for 14

modules. The additional space in

the 3499C mainframe enables the

2- or 3-slot RF and Optics modules

to be plugged in without giving up

a usable slot. The combination of an

individual module channel count,

and the total number of modules

that can be installed in one main-

frame determines the total number

of channels available for an appli-

cation. Table 1 (below) gives you an

idea of the maximum number of

channels possible for each main-

frame by showing the total number

of channels available when a high

channel count, 2-wire multiplexer

module is installed in every avail-

able slot. The 34970A and

3499A/B/C are best suited for appli-

cations with less than 60 channels

up to 360 channels. For applications

with a channel count greater than

360 channels, VXI switching is

recommended. Information on

Agilent VXI switching can be found at www.agilent.com/find, then enter

System Switches.

The modules available for the

34970A and the 3499A/B/C are

listed below in Table 2. As you can

see from the chart there are many

different types of switch modules to

choose from. You can easily identify

a module or modules that provides

the best solution your test applica-

tion needs. For more specific

module specifications please refer

to the product data sheets at:

www.agilent.com/find/3499 and/or www.agilent.com/find/34970A.

Mainframe Mainframe # of Module Maximum

Size Slots # of Channels

(2-wire)

34970A

Rack 3 60 2U

3499B

Rack 2 80 2U

3499A Full Rack 5 200

3499C Full Rack 9 360

5U (electrical)

(physical)

Table 1. Mainframes

Module Type 34970A 3499A/B/C

Multiplexer 34901A 20 Ch armature N2260A 40 Ch armature

34902A 20 Ch reed N2266A 40 Ch reed 34908A 40 Ch 1 wire armature N2270A 10 Ch 1000V

44470A 10 Ch 44470D 20 Ch

General Purpose 34903A 20 Ch N2261A 40 Ch

N2267A 8 Ch, 8A 44471A 10 Ch 44471D 20 Ch 44477A 7 Ch SPDT (Form C)

Matrix 34904A 4x8 N2262A 4x8

44473A 4x4

Digital I/O N2263A 32-bit TTL

44474A 16-bit TTL

Multifunction 34907A Two 8-bit Dig I/O, N2264A 12 GP, 3 GP 5A, 16-bit Dig I/O

26-bit Event Counter, N2265A 4x4 matrix, 16-bit Dig I/O Two 16-bit Analog out N2269A 2 DAC, 16-bit Dig I/O

Fiber-Optical N2280A Quad 1x2 Multiplexer N2281A Dual 1x4

N2282A Single 1x8

RF & Microwave 34905A Dual 4 Ch 2G 50 Ω N2268A Dual 1x4 3.5G 50 Ω

34906A Dual 4 Ch 2G 75 Ω N2272A Single 1x9 1.0G 50 Ω

N2276A Dual 1x6 20G 50 Ω N2276B Relay driver (2 switches) 44472A Dual 1x4 300M 50Ω 44478A Dual 1x4 1.3G 50Ω 44478B Dual 1x4 1.3G 75Ω 44476A Triple 1x2 18G 50Ω 44476B Relay driver (2 switches)

Table 2. Modules

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