The Spirent DLS400J is a digital line simulator that emulates telephony cable characteristics for comprehensive DSL equipment testing. Using passive discrete component networks (L, R, C), it reproduces real-world line conditions across ADSL, HDSL, T1, ISDN, and related technologies. The instrument supports hundreds of configurable cable segments and 28 preset ADSL test loops, with user-defined loop creation capability. Its passive design enables DC loop current passage and full bi-directional transmission simulation, making it ideal for validating transmission schemes using DMT, CAP, and 2B1Q line codes.
Technical Specifications
• Frequency Range: Accurately reproduces cable characteristics up to 1.5 MHz; select configurations extend to 2.0 MHz
• Cable Segments: Hundreds of segments matrixed for variable lengths and configurations
• Preset Test Loops: 28 preset loops optimized for ADSL; user-defined loops supported
• DC Loop Current: Passes DC loop current via passive component architecture
• Bi-directional Transmission: Full duplex simulation capability
• External Noise Inputs: 2 × 50 Ω connectors
– Key Features
• Passive L, R, C component design accurately replicates AC and DC cable characteristics
• Power and Remote indicators on front panel
• Supports ADSL, HDSL, T1, ISDN (BRI & PRI), and high-speed DSL applications
• Compatible with DMT, CAP, and 2B1Q line code implementations
– Typical Applications
• ADSL equipment validation and compliance testing
• DSL modem and line card functional verification
• Transmission impairment characterization
• Multi-standard DSL product development
– Compatibility & Integration
• IEEE-488 (GPIB) interface with SCPI command compliance
• RS-232 control interface
• Computer-controlled automated test system integration
