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Table Of Contents

PXI-2543 Specifications

Last Modified: March 2, 2017

This document lists specifications for the PXI-2543 multiplexer module. All specifications are subject to change without notice. Visit for the most current specifications.

PXI-2543 Specifications

Specifications characterize the warranted performance of the instrument under the stated operating conditions. Data in this document are Specifications unless otherwise noted.

Typical Specifications are specifications met by the majority of the instrument under the stated operating conditions and are tested at 23 °C ambient temperature. Typical specifications are not warranted.

All voltages are specified in DC, ACpk, or a combination unless otherwise specified.


The protection provided by the PXI-2543 can be impaired if it is used in a manner not described in this document.


Device relays might change state momentarily during electrostatic discharge.


Refer to the NI Switches Help at for detailed topology information.


Dual 4 × 1 multiplexers

Input Characteristics

Minimum input frequency

10 MHz

Characteristic impedance (Z0)

50 Ω nominal



Maximum safe DC input voltage

±8 V

Maximum Safe Continuous RF Power

Chassis power ON

+30 dBm

Chassis power OFF

+20 dBm


NI recommends against switching active RF signals. As a relay actuates, the channel is momentarily unterminated. Some RF sources can be damaged by reflections if their outputs are not properly terminated. Refer to your RF source documentation for more information.

RF Performance Characteristics

Insertion loss

≤2.4 GHz

<4.1dB (<3.4 dB, typical)

≤6 GHz

<5.8 dB (<5.1 dB, typical)

≤6.6 GHz

<7.0 dB (<6.1 dB, typical)

Insertion loss thermal coefficient

α = 2050 ppm/°C

Use the following equation to calculate the insertion loss at a given temperature:

I L T = I L T 0 ( 1 + α ( T T 0 ) )
  • IL is insertion loss in dB
  • T is the temperature at which the property is being measured in °C
  • T0 is the reference temperature in °C
  • α represents the insertion loss temperature coefficient in ppm/°C
Voltage standing wave ratio (VSWR)

≤2.4 GHz

<1.7 (<1.5, typical)

≤6 GHz

<1.8 (<1.5, typical)

≤6.6 GHz

<2.4 (<1.6, typical)

CH-COM isolation

≤2.4 GHz

>70 dB (>84 dB, typical)

≤6 GHz

>61 dB (>74 dB, typical)

≤6.6 GHz

>59 dB (<72 dB, typical)

CH-CH isolation

≤2.4 GHz

>69 dB (>90 dB, typical)

≤6 GHz

>58 dB (>74 dB, typical)

≤6.6 GHz

>53 dB (<71 dB, typical)

Bank-to-bank crosstalk

<-90 dB, typical

Channel-to-channel skew

<10 ps, typical

Propagation delay

1,720 psi, typical

Input 1 dB Compression

>27.6 dBm, minimum

>32.0 dBm, typical

Refer to the following figures for typical insertion loss, typical VSWR, and typical isolation, respectively.

Figure 1. Insertion Loss, Typical
Figure 2. VSWR, Typical
Figure 3. Isolation, Typical


Second-order harmonic distortion (Input IP2 (IIP2))

IP2 (input)

>+89 dBm, typical


Measurements are performed with single CW tones, ranging from -26 dBm to +10 dBm at the RF input. This specification is based on both experimental and calculated data.

Third-order intermodulation distortion (Input IP3 (IIP3))

IP3 (input)

>+54 dBm, typical


Measurements performed with two 10 dBm input tones = 1 MHz apart. This specification is based on both experimental and calculated data.

Dynamic Characteristics

Maximum switch operate time

76 μs


Switch operate time is defined as the time from TRIG IN falling to 10% to when the output reaches 90% of final value.


Certain applications may require additional time for proper settling. For information about including additional settling time, refer to the NI Switches Help at

Trigger Characteristics

Input trigger


PXI trigger lines <0...7>

Minimum pulse width

150 ns


The PXI-2543 can recognize trigger pulse widths less than 150 ns by disabling digital filtering. For information about disabling digital filtering, refer to the NI Switches Help at

Front panel input voltage

-0.5 V, minimum

+0.7 V, VL maximum

+2.0 V, VH minimum

+3.3 V, nominal

+5.5 V, minimum

Output trigger


PXI trigger lines <0...7>

Pulse width

Programmable (1 μs to 62 μs)

Front panel nominal voltage

3.3 V TTL, 8 mA

Physical Characteristics

Switch type


Front panel connectors


10 SMA jacks, female


2 SMB jacks, female

Power requirement


0.6 W at 5 V

0.6 W at 3.3 V

PXI Express

0.4 W at 12 V

1 W at 3.3 V

Dimensions (L × W × H)

3U, one slot, PXI/cPCI module, PXI Express compatible 21.6 cm × 2.0 cm × 13.0 cm (8.5 in. × 0.8 in. × 5.1 in.)


774 g (27.3 oz)


Operating temperature

0 °C to 55 °C

Storage temperature

-20 °C to 70 °C

Relative humidity

5% to 85%, noncondensing

Pollution Degree


Maximum altitude

2,000 m

Indoor use only.

Shock and Vibration

Operational Shock

30 g peak, half-sine, 11 ms pulse (Tested in accordance with IEC 60068-2-27. Test profile developed in accordance with MIL-PRF-28800F.)

Random Vibration


5 Hz to 500 Hz, 0.3 grms


5 Hz to 500 Hz, 2.4 grms (Tested in accordance with IEC 60068-2-64. Nonoperating test profile exceeds the requirements of MIL-PRF-28800F, Class 3.)

Compliance and Certifications


This product is designed to meet the requirements of the following electrical equipment safety standards for measurement, control, and laboratory use:

  • IEC 61010-1, EN 61010-1
  • UL 61010-1, CSA 61010-1

For UL and other safety certifications, refer to the product label or the Online Product Certification section.

Electromagnetic Compatibility

This product meets the requirements of the following EMC standards for electrical equipment for measurement, control, and laboratory use:
  • EN 61326-1 (IEC 61326-1): Class A emissions; Basic immunity
  • EN 55011 (CISPR 11): Group 1, Class A emissions
  • AS/NZS CISPR 11: Group 1, Class A emissions
  • FCC 47 CFR Part 15B: Class A emissions
  • ICES-001: Class A emissions

In the United States (per FCC 47 CFR), Class A equipment is intended for use in commercial, light-industrial, and heavy-industrial locations. In Europe, Canada, Australia, and New Zealand (per CISPR 11), Class A equipment is intended for use only in heavy-industrial locations.


Group 1 equipment (per CISPR 11) is any industrial, scientific, or medical equipment that does not intentionally generate radio frequency energy for the treatment of material or inspection/analysis purposes.


For EMC declarations and certifications, refer to the Online Product Certification section.

CE Compliance

This product meets the essential requirements of applicable European Directives, as follows:

  • 2014/35/EU; Low-Voltage Directive (safety)
  • 2014/30/EU; Electromagnetic Compatibility Directive (EMC)

Online Product Certification

Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for this product, visit, search by model number or product line, and click the appropriate link in the Certification column.

Environmental Management

NI is committed to designing and manufacturing products in an environmentally responsible manner. NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers.

For additional environmental information, refer to the Minimize Our Environmental Impact web page at This page contains the environmental regulations and directives with which NI complies, as well as other environmental information not included in this document.

Waste Electrical and Electronic Equipment (WEEE)
EU Customers  

At the end of the product life cycle, all NI products must be disposed of according to local laws and regulations. For more information about how to recycle NI products in your region, visit


National Instruments符合中国电子信息产品中限制使用某些有害物质指令(RoHS)。关于National Instruments中国RoHS合规性信息,请登录。(For information about China RoHS compliance, go to

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