Table Of Contents

PXI-2544 Specifications

    Last Modified: March 3, 2017

    This document lists specifications for the PXI-2544 ( PXI-2544) multiplexer module. All specifications are subject to change without notice. Visit for the most current specifications.


    8 × 1 multiplexers

    About These Specifications

    Specifications characterize the warranted performance of the instrument under the following operating conditions:

    • Chassis is powered on
    • Calibration adjustment cycle maintained
    • 50 Ω termination connected to unused I/O front panel connectors

    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.

    Nominal values (or supplemental information) describe additional information about the product that may be useful, including expected performance that is not covered under Typical Specifications. Nominal values are not covered by warranty.

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

    Clean devices and terminal blocks by brushing off light dust with a soft, nonmetallic brush. Remove other contaminants with a soft, lint-free, dampened cloth. Do not use detergent or chemical solvents. The unit must be completely dry and free from contaminants before returning to service.

    Input Characteristics

    Minimum input frequency

    10 MHz

    Characteristic impedance (Z0)

    50 Ω nominal



    Maximum safe DC input voltage


    Maximum Safe Continuous RF Power

    Chassis power ON

    +30 dBm

    Chassis power OFF

    +20 dBm

    RF Performance Characteristics

    Values in parentheses are typical.

    Insertion loss

    ≤2.4 GHz

    <4.5 dB (<3.2 dB)

    ≤6 GHz

    <6.3 dB (<5.2 dB)

    ≤6.6 GHz

    <7.2 dB (<6.0 dB)

    Insertion loss thermal coefficient

    α = 3,402 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 ) )
    where 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 insertion loss temperature coefficient in ppm/°C
    Table 1. PXI-2544 Flatness (Typical)
    Frequency Flatness / 200 MHz Flatness / 1 GHz
    10 MHz to 5 GHz <0.30 dB <0.8 dB
    5 GHz to 6 GHz <0.32 dB <1.0 dB
    6 GHz to 6.6 GHz <0.47 dB <1.3 dB
    Voltage standing wave ratio (VSWR)

    10 MHzx ≤3.5 GHz

    <1.9 (<1.5)

    3.5 GHz < x ≤6 GHz

    <1.9 (<1.4 )

    6 GHz < x ≤6.6 GHz

    <2.2 (<1.6)

    CH-COM isolation

    ≤2.4 GHz

    >77 dB (>95 dB)

    ≤6 GHz

    >65 dB (>77 dB)

    ≤6.6 GHz

    >61 dB (>72 dB)

    CH-CH isolation

    ≤2.4 GHz

    >77 dB (>95 dB)

    ≤6 GHz

    >62 dB (>82 dB)

    ≤6.6 GHz

    >56 dB (>76 dB)

    Typical channel-to-channel skew

    <10 ps

    Typical propagation delay

    1100 ps

    Input 1 dB compression


    >27 dBm


    >32 dBm

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

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


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

    Typical IP2 (input)

    >+91 dBm


    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))

    Typical IP3 (input)

    >+56 dBm


    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

    122 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. Refer to the NI Switches Help at for more information about including additional settling time.

    Trigger Characteristics

    Input trigger


    PXI trigger lines 0 –7, front panel

    Minimum pulse width

    150 ns


    The PXI-2544 can recognize trigger pulse widths less than 150 ns if you disable digital filtering. Refer to the NI Switches Help at for information about disabling digital filtering.

    Front panel input voltage


    -0.5 V

    VL maximum

    +0.7 V

    VH minimum

    +2.0 V


    +3.3 V


    +5.5 V

    Output trigger


    PXI trigger lines 0–7, front panel

    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


    9 SMA jacks, female


    2 SMB jacks, female

    Power requirement

    5 V

    0.1 W

    3.3 V

    0.6 W

    PXI Express

    12 V

    0.6 W

    3.3 V

    0.9 W

    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.)


    538 g (19 oz)


    Maximum altitude

    2,000 m (at 25 °C ambient temperature)

    Pollution Degree


    Indoor use only.

    Operating Environment

    Ambient temperature range

    0 °C to 55 °C (Tested in accordance with IEC-60068-2-1 and IEC-60068-2-2.)

    Relative humidity range

    10% to 90%, noncondensing (Tested in accordance with IEC-60068-2-56.)

    Storage Environment

    Ambient temperature range

    -40 °C to 70 °C (Tested in accordance with IEC-60068-2-1 and IEC-60068-2-2.)

    Relative humidity range

    5% to 95%, noncondensing (Tested in accordance with IEC-60068-2-56.)

    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, certifications, and additional information, refer to the Online Product Certification section.

    CE Compliance

    This product meets the essential requirements of applicable European Directives, as follows:
    • 2006/95/EC; Low-Voltage Directive (safety)
    • 2004/108/EC; Electromagnetic Compatibility Directive (EMC)

    Online Product Certification

    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 not only to the environment but also 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 products must be sent to a WEEE recycling center. For more information about WEEE recycling centers, National Instruments WEEE initiatives, and compliance with WEEE Directive 2002/96/EC on Waste Electrical and Electronic Equipment, visit



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