The VIAVI ALT-9000 is a portable, fiber optic–based test set that enables comprehensive closed-loop testing of all types of radio altimeters — including LPI (Low Probability of Intercept), CARA (Combined Altitude Radar Altimeter), and next-generation radar systems. Designed for avionics technicians, engineers, and maintainers, the ALT-9000 delivers precise altitude simulations using true RF time delay and path loss modeling.
Whether you're validating new avionics installations, performing flight line diagnostics, or troubleshooting complex signal issues, the ALT-9000 offers unmatched versatility and performance in one rugged, battery-operated unit.
Supports all radar altimeter formats, including legacy and next-gen variants like LPI and CARA.
Delivers accurate and repeatable altitude testing using fiber optic delay lines — replicating real flight conditions on the ground.
Lightweight, battery-powered, and enclosed in a durable chassis, perfect for hangar or bench use.
Large graphical interface provides parametric data like TX power, frequency, FM deviation, PRF, and more.
Test via UUT TX/RX connectors or aircraft antennas using couplers — flexible for any environment.
Simulate altitudes from 5 ft* to 10,000 ft (or up to 25,000 ft with options) in 5 ft increments.
The ALT-9000 isn’t just another altimeter test set — it’s a complete solution built for precision, flexibility, and ease of use. Whether you’re troubleshooting complex LPI radar systems or verifying standard installations, the ALT-9000 delivers advanced RF simulation and real-time measurement capabilities in a rugged, flight-line-ready package. With features that support both static and dynamic altitude profiles, direct-connect or over-the-air testing, and intuitive touchscreen control, the ALT-9000 brings lab-grade performance to the hangar floor. Below are the key features that make the ALT-9000 a trusted tool for avionics professionals worldwide:
The ALT-9000 allows for full end-to-end testing of radio altimeter systems by closing the RF loop from transmit to receive. This means you can verify performance across the entire signal chain, including antennas, coaxial cables, Line Replaceable Units (LRUs), and cockpit indicators. By isolating faults at the system level, technicians can avoid unnecessary swaps of expensive components, significantly reducing maintenance costs and downtime.
The ALT-9000 delivers real-time visibility into the key operational metrics of most radio altimeters. These include:
*Support varies by altimeter type, depending on modulation and signal characteristics.
Perform tests in the hangar with maximum flexibility. The ALT-9000 supports both direct-connect testing via the TX/RX ports and over-the-air testing using antenna couplers. This means technicians can verify system performance without removing hardware, making it ideal for both quick troubleshooting and detailed validation.
The ALT-9000 simulates real-world altitude conditions without ever lifting off the ground. Run static altitude tests from 5 ft to 10,000 ft in 5-ft increments — or use dynamic altitude profiles to simulate climb, descent, or maneuvering conditions. Ideal for validating TCAS, GPWS/TAWS, and autopilot response, this feature brings flight realism to your test environment.
| Component | Dimensions (in) | Weight |
|---|---|---|
| Coupler | 7.5 x 7.5 x 7 | - |
| Single Carry Case | 10 x 9 x 9 | 6.5 lbs (3 kg) |
| Dual Carry Case | 16 x 9 x 12 | 9 lbs (4 kg) |
