IsatData Pro Physical Layer Tester (DPLT)

Testers & Simulators

The IsatData Pro Physical Layer Tester (DPLT) supports testing of the physical layer performance and protocol implementation of Mobile Terminals (MTs) implementing Inmarsat’s IsatData Pro (IDP) services.

The DPLT application runs on the SPCI Physical Layer Tester Multi-Channel Platform (PLT M) and is referred to as DPLT on MCP or DMCP.

Specifications

Demodulator features Auto-identification of return burst type, optimized for transmitter performance testing

Transmit Capabilities
Channels	4 simultaneous
Channel types	Bulletin Board To-mobile (forward traffic) From-mobile (return traffic/ack sub-channels) Test tones (CW, two-tone, etc.) and raw samples
Channel impairments	Independently-specifiable parameters: Fixed carrier frequency error Burst frequency jitter Sinusoidal Doppler peak rate and offset ACI level and frequency offset CCI level I/Q gain and phase imbalance Continuous phase noise spectrum, level Discrete phase noise level, frequency offset Fading model, bandwidth, C/M ratio Phase and amplitude jump distribution, magnitude, interval Periodic signal blockage (e.g., helicopter) Transmission path delay Burst timing jitter Symbol rate error HPA non-linearity AWGN C/No
Receive Capabilities
Channels	4 simultaneous
Channel types	Bulletin Board To-mobile (forward traffic) From-mobile (return traffic/ack sub-channels) Unframed (raw samples)
Signal analysis	Signal capture (raw samples and soft decisions) 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 MSE, EVM^2 Eb/No loss Uncoded errors Power profile Spectral shape Spurious emissions Phase noise spectrum
Ethernet Interface Capabilities
Medium	10/100/1000BaseT
Functionality	Protocol Tester interface, remote control interface, MT control interface, MPC interface for ESE emulation, GPIB interface (with Ethernet-to-GPIB converter)
Logging Capabilities
General	Transmitted/received packet data Test sequence progress and outcome Protocol Tester interface messages System events, faults, and abnormal condition
Signal analysis	Signal analysis measurements Signal analysis statistics Raw input samples Demodulator soft decisions
Script Capabilities
General	Procedural (similar to C or Basic) Functions for string processing, math, user interaction, logging, I/O (serial, TCP/IP, GPIB) Integrated development environment
CPLT-specific	Controlling the Tx and Rx channels Sending and receiving IDP packets Controlling channel impairments Sending and receiving MT control messages