--- type: product schema_version: 1 stock_number: "98775-1" canonical_url: "https://www.artisantg.com/98775-1/Exfo-FTBx-3500-BI-EI" json_url: "https://www.artisantg.com/98775-1/Exfo-FTBx-3500-BI-EI.json" generated_at: "2026-11-07T21:01:06.665Z" last_updated: "2026-10-14T13:00:51.160-05:00" --- # Exfo FTBx-3500-BI-EI Variable Attenuator w/Power Monitoring _Summary and Categories are this item's record. The description sections and FAQ are machine-assisted and can contain errors; where they disagree with the record, the record is correct, and where description sections disagree with each other, Details wins._ ## Summary - Manufacturer: Exfo - Model: FTBx-3500-BI-EI - Condition: Used and in Excellent Condition - Price: $2,150.00 USD - Availability: In stock, 1 available - Warranty: 1-Year Warranty with 30-Day Return Guarantee - ITAR restricted: No - Shipping weight: 2 lb, estimated - Shipping dimensions: 9X9X3 in, estimated ## Categories - Test Equipment > Optical Test > Attenuators (primary) ## Details ### Configuration - Fiber Type: Singlemode 9/125 μm - Wavelength Range: 1250 to 1650 nm - Typical Insertion Loss: 1.5 dB - Maximum Insertion Loss: 2.2 dB - Connector Type: *PC *This unit comes with the standard Exfo optical interface as shown here. The Exfo Universal Interface (EUI) Connector Adapters are sold separately. They can be purchased here. ## Overview Benchtop variable attenuator with built-in power meter for single-mode fiber. Attenuation range: 3 to 60 dB. Wavelength range: 1250 to 1650 nm. Optical return loss: >55 dB. Power measurement range: -65 to +10 dBm. SC/APC connector. GPIB and Ethernet interfaces for remote control and data acquisition. Applications include automated testing of optical components and systems. ## Function Attenuates optical signals across a wide wavelength range, typically 1250-1650nm. Provides precise control over attenuation levels with low insertion loss and high return loss. Simultaneously measures optical power levels via integrated power meter. Used for BER testing, margin analysis, and system characterization in fiber optic communication systems. Bidirectional capability supports testing in both transmission directions. ## Platform Designed for integration within rackmount test platforms, specifically the LTB-8 chassis, this variable attenuator with integrated power monitoring operates on singlemode 9/125 µm fiber over 1250 to 1650 nm wavelength range. It connects via standard fiber optic interfaces and interfaces with test system controllers for precise attenuation and output power control, enabling automated transceiver testing and system verification in continuous 24/7 production environments. Compatible accessories include power meters (e.g., FTBx-1750) and MEMS optical switches (e.g., FTBx-9160) within the EXFO ecosystem, facilitating modular and scalable optical test configurations. ## Accessories FTBx platform chassis, optical patch cords (FC/APC, SC/APC, LC/APC), fiber optic cleaning kit. interfaces: Optical Input/Output (attenuator path), Optical Input (power meter), via interchangeable bulkheads; RJ45 (8P8C) Ethernet for remote control. ## Images - - - - -