Testers & Simulators

BGAN Physical Layer Tester (BPLT)

BGAN Physical Layer Tester (BPLT)

The BGAN Physical Layer Tester (BPLT) supports the testing of physical layer performance and protocol implementation of Radio Access Nodes (RANs) and User Terminals (UTs) implementing Inmarsat’s Broadband Global Area Network (BGAN), Fleet Broadband and Swift Broadband services.

The BPLT application runs on multiple hardware platforms, including the original PLT-H, which supports multiple services, and the PLT-M, which supports only the BGAN and IDP applications. The version of BPLT that runs on Square Peg’s generic MCP-based Physical Layer Tester (PLT-M) platform is referred to as BPLT on MCP (BMCP).

The BGAN Network Emulator can also be used with the BPLT to provide emulation of the end-to-end network.

Transmit Capabilities

Physical channels4 simultaneous; 1-4 bearers per physical channel depending upon bearer type
Channel Types

LESP (8.4, 33.6, 84, 168 ksym/s QPSK;
33.6, 84, 151.2, 168 ksym/s 16-QAM;
84, 168 ksym/s 32-QAM;
84, 168 ksym/s 64-QAM)
MESP (16.8, 33.6, 67.2, 151.2 ksym/s p/4-QPSK;
33.6, 67.2, 151.2 ksym/s 16-QAM;
5, 20 or 80 ms bursts)
Test tones (CW, two-tone, etc.) and raw samples

Channel impairments

Independently-specifiable parameters:

  • Fixed carrier frequency error, burst frequency jitter
  • Doppler rate, peak offset
  • Navigation-based Doppler and path delay
  • Reacquisition carrier offset
  • Adjacent channel interference level and frequency offset
  • Co-channel interference level
  • I/Q gain and phase imbalance
  • Continuous phase noise spectrum, level
  • Discrete phase noise level, frequency offset
  • Fading model, bandwidth, C/M ratio, differential delay, path Doppler for up to 5 paths
  • Phase and/or amplitude jump distribution, magnitude, interval
  • Blockage depth, interval, duration
  • Transmission path delay, burst timing jitter
  • Symbol rate error
  • HPA non-linearity
  • AWGN

Receive Capabilities

Physical channels
4 simultaneous
Channel types
  • LESP (as per transmitter)
  • MESP (as per transmitter)
  • Unframed
Channel modesAnalysis (auto-identification of burst types, optimized for transmitter performance testing)
SDM (fully compliant performance in noise, PLT-H only)
Signal analysisSignal capture (raw samples and soft decisions)
Signal replay (from raw samples)
Selectable pass/fail limits for measurements:
  • Carrier frequency offset
  • Average power, power rate of change
  • Phase change
  • Integrated phase noise
  • Burst timing offset
  • Symbol clock rate error
  • I/Q gain and phase imbalance
  • Constellation mean-squared error, EVM
  • HPA compression and AM/PM
  • Eb/No loss
  • Uncoded errors
  • Power profile
  • Spectral shape
  • Out-of-band emissions
  • Phase noise spectrum

Ethernet Interface Capabilities

FunctionalityProtocol Tester interface, remote control interface (e.g., to LabView™), UT control interface, voice codec interface, GPIB interface (with Ethernet-to-GPIB converter), ARINC-429 interface (with USB or Ethernet-to-429 converter)

Logging Capabilities

GeneralProtocol Tester interface messages
Transmitted/received user or channel data
Test sequence progress and outcome
System events, faults, and abnormal conditions
Signal analysisSignal analysis measurements
Signal analysis statistics
Raw input samples
Demodulator soft decisions

Script Capabilities

GeneralProcedure-based (like Basic, C or Pascal)
Functions for string processing, math, user interaction, logging, I/O (serial, TCP/IP, GPIB)
Integrated development environment
BPLT-specificConfiguring and controlling modems
Sending and receiving user data
Controlling channel simulator
Sending and receiving BPT and UT messages
(Not all components are required for all test applications)

Physical Layer Tester (PLT-M)

  • Full capabilities, including satellite channel simulator and signal analysis
  • One-box solution
  • L-band, S-band and IF versions
  • Optional rack mount kit

Physical Layer Tester (PLT-H)

  • Full capabilities, including satellite channel simulator and signal analysis
  • Requires MSS L-band Radio Frequency Unit (RFU) for operation at L-band

Physical Layer Tester (PLT-L)

  • For protocol testing and network emulator only.

ATC Interface Unit (AIU)

Square Peg Communications Inc.
4017 Carling Avenue, Suite 200 
Ottawa, ON, Canada K2K 2A3
Tel + 1 613 271 0044
Fax+ 1 613 271 3007
Contact us for more information: