The Spirent DLS5104 is a digital subscriber line simulator and impairment generator that emulates real-world DSL loop conditions and network impairments in a controlled laboratory environment. It validates DSL equipment performance across modems, DSLAMs, and network devices by injecting precise noise profiles, simulating cable characteristics, and reproducing insertion loss, delay, phase shift, and impedance parameters.
Technical Specifications
DSL Technology Support
• ADSL, ADSL2, ADSL2+, ADSL2++, HDSL, HDSL2, HDSL4, SHDSL, ISDN, DSL, VDSL, VDSL2
• Standards compliance: ATIS, DSL Forum, ETSI, ITU-T
Loop Simulation
• Cable models: PE04 and 26AWG
• Maximum reach: 21 kft (26AWG), 7 km (PE04mm)
• Loop step increments: 100 m (PE04, 0–7 km range); 250 ft (26AWG, 0–21 kft range)
• Frequency range: DC to 30 MHz
Noise Generation
• Noise types: impulsive, RFI, fluctuating
• White noise (DLS-6900AWGN): −90 dBm/Hz to −140 dBm/Hz in 0.25 dB increments
• Injection modes: common mode, differential mode
• Crest factor: greater than 5 (ETSI compliant)
• Maximum output: ±10 V
Noise Injection Units (DLS-5409)
• Passive injection onto wireline simulators and modem inputs
• Noise bandwidth: up to 30 MHz
Noise Generator/Sequencer Platform (DLS-5800)
• Expandable configuration: 2 to 6 noise cards (8 to 24 outputs)
• Concurrent script execution: up to 3 independent scripts for multiple test environments
• Multi-platform injection: single generator drives multiple wireline simulators
Simulation Parameters
• Insertion loss, delay, phase, and input impedance modeling
– Key Features
• 2U rack-mountable chassis design
• Manual front-panel control and remote RS232 serial interface
• Expansion slots for scaling noise card capacity
– Typical Applications
• DSL equipment validation and performance characterization
• Modem and DSLAM testing under simulated loop conditions
• Noise injection and impairment scenario reproduction
• Multi-environment test orchestration
– Compatibility & Integration
Supports ATIS, DSL Forum, ETSI, and ITU-T standards. Integrates with wireline test platforms via passive injection units and noise generation subsystems.
