The Spirent DLS400HE1 is a DSL test module engineered for validation of DSL equipment across multiple standards and technologies. It simulates local loop characteristics using passive discrete component networks (L, R, C) to replicate real telephony cable behavior, supporting ADSL2+, VDSL2, G.fast, and additional xDSL variants. The instrument delivers accurate cable simulation up to 1.5 MHz, extending to 2.0 MHz in select configurations, with analog bandwidth reaching 30 MHz for comprehensive standards testing.
Technical Specifications
• Cable Simulation: Hundreds of matrixable cable segments configured in various lengths and line topologies
• Analog Bandwidth: Up to 1.5 MHz standard; up to 2.0 MHz in specific configurations
• Test Bandwidth: 30 MHz for SHDSL, ADSL, ADSL2, ADSL2+, ADSL2++, and VDSL2
• Preset Loops: 28 ADSL test loops with custom loop creation capability
• Loop Increments: PE04 cable: 100 m increments (0–7 km); 26AWG cable: 250 ft increments (0–21 kft)
• Line Codes: DMT, CAP, 2B1Q and other transmission schemes
• Micro Interruption Simulation: G.SHDSL-compliant with user-configurable parameters
• Input Voltage: 100–240 VAC (±10%), 50–60 Hz
• Power Consumption: 120 VA maximum
• Dimensions: 194 mm (H) × 452 mm (W) × 494 mm (D)
• Weight: 28 kg
• Form Factor: 2U rack-mountable chassis
– Key Features
• Passive circuitry topology ensures low noise floor for accurate test results
• DC loop current pass-through capability via passive components
• Multi-gauge cable configurations: 26AWG and PE04mm models
• External noise input via (2) 50 Ω connectors
• BNC connector for external signal injection
– Standards Support
ADSL, ADSL2, ADSL2+, ADSL2++, VDSL2, VDSL1, G.SHDSL (Annex A), HDSL, T1, ISDN (BRI & PRI)
– Compatibility & Integration
• IEEE-488 (GPIB) with SCPI command set for automated test systems
• RS-232 DCE interface: 9600 bps, no parity, 8 data bits, 1 stop bit, RTS/CTS flow control
• Line fuses: Type T, 2A/250V SLOW BLOW (2 required, 5 mm × 20 mm)
