Overview

The National Instruments PXI-2590 and PXI-2591 are 4x1 high-

frequency unterminated multiplexing switches. The NI SCXI-1190 and

NI SCXI-1191 perform the same functions as the PXI-2590 and

PXI-2591 but also offer a quad 4x1 multiplexing configuration. The

switches are capable of switching signals from DC to 1.3 GHz

(SCXI-1190 and PXI-2590) and DC to 4 GHz (SCXI-1191 and

PXI-2591). The characteristic impedance of the channels is 50

.

For the SCXI-1190 and the PXI-2590, the maximum voltage rating

with a maximum current of 330 mA. All are well suited for

applications that require the routing of high-frequency signals inside

automated test equipment (ATE) systems because they can switch

signals with a very low insertion loss. In addition, the excellent

voltage standing-wave ratio (VSWR) and isolation parameters make

these modules the perfect choice in a system geared to high-

frequency applications as shown in Table 1.

Extended Features and Specifications

National Instruments switch modules are built with a number of core

features that are covered in detail in the Switch Overview section.

For additional information about the PXI-2590, PXI-2591, SCXI-1190, and

SCXI-1191, including software, certifications and compliance, relay

control, etc., please see page 20. For detailed specifications, please

see page 504.

1.3 GHz and 4 GHz Multiplexers

NI SCXI-1190 ................................................................776572-90

NI PXI-2590 ..................................................................777987-01

NI SCXI-1191 ................................................................776572-91

NI PXI-2591 ..................................................................778339-01

Includes switch module and NI-SWITCH driver software.

For information on extended warranty and value added

services, see page 20.

See page 499 for accessory and cable information.

BUY ONLINE!

and/or scxi1191.

Ordering Information

• 4x1 unterminated multiplexer

• 50

characteristic impedance

•High-bandwidth

electromechanical relays

•Excellent insertion loss, VSWR,

and isolation specifications

•Fully software programmable

SCXI-1190 (quad 4x1),

PXI-2590 (single 4x1)

• 1.3 GHz bandwidth

• SMB direct connectivity

•1 A at 24 VDC capacity

SCXI-1191 (quad 4x1),

PXI-2591 (single 4x1)

•4 GHz bandwidth

• SMA direct connectivity

• 330 mA at 30 VDC capacity

Operating Systems

•Windows 2000/NT/XP

Recommended Software

• LabVIEW

• LabVIEW Real-Time Module

(PXI Modules only)

• LabWindows/CVI

•Measurement Studio

• NI Switch Executive

Other Compatible Software

•Visual Basic

• C/C++

Driver Software (included)

• NI-SWITCH

Compliance

•CE

NI SCXI-1190, NI PXI-2590, NI SCXI-1191, NI PXI-2591

Module

Insertion Loss

VSWR

SCXI-1190, PXI-2590 (@ 1.3 GHz)

< 1.5 dB

< 1.5

SCXI-1190, PXI-2590 (@ 2 GHz)

< 3 dB

< 2.5

SCXI-1191, PXI-2591 (@ 4 GHz)

< 0.9 dB

< 1.5

Table 1. Parameters of High-Frequency Switching Modules