Physical Layer Tester (PLT-M)

Square Peg Communications Inc.’s fourth-generation Physical Layer Tester (PLT-M) is a generic PC based test tool which supports the testing and type approval of mobile terminals and base stations for various satellite or wireless communications networks. The PLT-M is based on Square Peg’s Multi-Channel Platform (MCP) Channel Unit, a software-defined radio providing baseband-to-RF functionality.

The generic PLT-M hardware platform runs software specific to the equipment type under test. The following applications are currently available or in development:

Product

Inmarsat Standards

BGAN Physical Layer Tester (BMCP)

BGAN, FleetBroadband, SwiftBroadband, SB-SAT

IsatData Pro Physical Layer Tester (DMCP)

IsatData Pro (under development)

  • The PTL-M implements the communication channels at L-band. Up to four transmit and four receive channels are supported. It communicates with an optional Protocol Tester or network emulator as well as external test equipment and the unit under test over a LAN or serial connection. The PLT-M includes a high stability 10 MHz frequency reference and provides a local or remote Windows-based Operator Interface.

  • PHYSICAL AND ENVIRONMENTAL


    Form factor 

    19” / 2.5U rack mount
    (optional 0.5U filler plate available)

    Size (with bumpers)

    L 51 cm x W 51.75 cm x H 12.07 cm
    L 20 in x W 20.38 in x H 4.75 in

    Weight (with internal highpower attenuator)

    7 kg (15 lb)

    Power connector

    IEC 320 male

    Voltage

    100-240 VAC, 50/60 Hz

    Current (typical, with four 600 MHz DSPs)

    1.5 A rms at 115 VAC

    Operating temperature

    10°C to 35°C

    Operating humidity

    20% to 75% relative humidity, noncondensing

    Regulatory

    FCC, CE and RoHS compliant, Safety: EN61010-1, Emissions & immunity: EN61326-1 Class A

    RF


    Connector

    Combined RF: N female
    Rx In / Tx Out: SMA female

    Impedance

    50 ohms nominal

    Receive frequency

    1626.5 to 1675.0 MHz

    Receive frequency step size

    1 Hz

    Receive level (Rx In)

    -35 to +16 dBm per channel
    +16 dBm max total

    Receive level (Combined RF)

    -34 to +17 dBm per channel
    +17 dBm max total

    Receive level (Combined RF, with optional high power attenuator)

    -4 to +43 dBm per channel
    +43 dBm max total

    Receive level measurement resolution

    0.01 dB

    Receive level measurement accuracy

    ±1.0 dB

     

    Receiver spurious signals

    ≤-55 dBc

    Receiver phase noise density

    @ 10 Hz:     ≤-55 dBc/Hz
    @ 100 Hz:   ≤-75 dBc/Hz
    @ 1 kHz:     ≤-85 dBc/Hz
    @ 10 kHz:   ≤-90 dBc/Hz
    @ 100 kHz: ≤-100 dBc/Hz

    Receiver 3rd order intermodulation

    ≤-55 dBc (two carriers at 3 dB below maximum, receive path attenuation adjusted optimally)

    Receiver I/Q amplitude and phase  imbalance

    Negligible

    Transmit frequency

    1518.0 to 1559.0 MHz

    Transmit frequency step size

    1 Hz

    Transmit level (Tx Out)

    -90 to -25 dBm per carrier

    Transmit level (Combined RF)

    -91 to -26 dBm per carrier

    Transmit level (Combined RF, with optional high-power attenuator)

    -121 to -56 dBm per carrier

    Transmit level resolution

    0.01 dB

    Transmit level accuracy

    ± 1.0 dB

    Transmit phase noise density

    @ 10 Hz:     ≤-50 dBc/Hz
    @ 100 Hz:   ≤-70 dBc/Hz
    @ 1 kHz:     ≤-87 dBc/Hz
    @ 10 kHz:   ≤-90 dBc/Hz
    @ 100 kHz: ≤-100 dBc/Hz

    Transmit spurious

    < -55 dBc or -90 dBm

    Transmit 3rd order intermodulation

    ≤-55 dBc with two carriers at 3 dB below maximum

    Transmit frequency accuracy

    ± 1 x 10-7

    Transmit I/Q amplitude and phase imbalance

    Negligible

    REFERENCE


    Source

    Internal / External

    Connector

    BNC female

    Impedance

    50 ohms

    Frequency

    10 MHz

    Level

    0 dBm ± 2 dB

    Frequency error

    ≤10-7 (with yearly calibration)

    BASEBAND INTERFACES


    Sync

    TTL, configurable as input or output
    Input impedance: ≥ 1000 ohms
    Load impedance: ≥ 1000 ohms

    Ethernet

    2 x 10/100/1000 Base T

    Serial

    1 x RS-232, 1 x RS-232/422/485

    USB

    4 x USB 2.0, 2 x USB 3.0

    Video

    VGA, DVI

    Audio

    Standard PC audio

    PROCESSING


    Host

    Core i7

    DSPs

    4 to 8 TigerSHARC, 500/600 MHz

    FPGA

    Virtex-5, Kintex-7

  • PLTM Data Sheet

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  • © 2019   Square Peg Communications Inc.