The HP/Agilent 3789B DS3 Transmission Test Set delivers end-to-end DS3 circuit testing and troubleshooting from a single access point. This instrument generates and analyzes DS3 signals at 44.736 Mbps, supports unframed and framed test patterns (M13 and C-bit parity), and includes built-in demultiplexing for simultaneous DS1/DS3 measurements. Bidirectional testing on C-bit parity equipment enables simultaneous signal analysis in both directions, while comprehensive error injection capabilities stress-test interfaces and detect transmission faults.
## Technical Specifications
**Signal Generation & Detection**
• Supports unframed, M13, and C-bit parity test patterns
• Generates and detects DS3 Idle signals
• DS3 operating rate: 44.736 Mbps
• Built-in demultiplexer for DS1 signal extraction from DS3 access point
**Testing Capabilities**
• Error injection facility for equipment stress testing
• Bidirectional simultaneous testing (C-bit parity framing)
• Single access point measurement architecture
**Power & Physical**
• Line voltage: 100, 115, 120, or 220, 230, 240 VAC ±10%
• Power dissipation: less than 200 VA
• Dimensions: 213 mm H × 366 mm W × 460 mm D
• Weight: 9 kg
## Key Features
• Dual DS1/DS3 signal measurement from single DS3 port
• Bidirectional path characterization on C-bit parity systems
• Complete framing format flexibility for legacy and modern deployments
• Error injection for validation and margin testing
## Typical Applications
• DS3 transmission line commissioning and maintenance
• Carrier circuit acceptance testing
• Jitter and signal integrity analysis
• Interface troubleshooting and performance verification
## Compatibility & Integration
Works with equipment using unframed, M13, and C-bit parity frame formats. Requires DS3 access point connection for measurement.
