--- type: product schema_version: 1 stock_number: "95403-18" canonical_url: "https://www.artisantg.com/95403-18/Rohde-Schwarz-1126-2250-20" json_url: "https://www.artisantg.com/95403-18/Rohde-Schwarz-1126-2250-20.json" generated_at: "2026-11-07T11:14:17.657Z" last_updated: "2026-10-21T05:35:41.353-05:00" --- # Rohde & Schwarz 1126.2250.20 MW-Bias Unit _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: Rohde & Schwarz - Model: 1126.2250.20 - Condition: Used and in Excellent Condition - Price: $215.00 USD - Availability: In stock, 12 available - Warranty: 1-Year Warranty with 30-Day Return Guarantee - ITAR restricted: No - Shipping weight: 2 lb, estimated - Shipping dimensions: 8X8X3 in, estimated ## Categories - Test Equipment > Electrical Test > Microwave (primary) - Test Equipment > Electrical Test > Bias Tees - Test Equipment > Electrical Test > Electrical Parts ## Details Part Number: 1126.2250.20 ## Overview Microwave bias unit designed to provide DC bias voltage and current to active microwave components such as amplifiers, mixers, and frequency converters while maintaining RF signal integrity through integrated bias tees. Features low noise voltage regulation, current limiting protection, and wide frequency range RF transparency from DC to millimeter wave frequencies. Incorporates precision voltage and current metering with programmable output levels and protection circuits. Connects via standard laboratory power connectors for DC supply and precision RF connectors for signal path integration. Enables characterization and operation of active microwave devices in test environments, amplifier bias control in communication systems, and mixer local oscillator biasing in radar and measurement applications. ## Function Supplies precision DC bias currents and voltages to microwave semiconductor devices, such as amplifiers, mixers, or switches, to establish optimal operating points for specified RF performance characteristics including gain, linearity, and noise figure, often incorporating protection and control features. ## Platform Designed for integration into microwave and RF test setups, this module provides precise bias control for active components within vector network analyzer configurations. It interfaces via coaxial connectors and control ports to supply stable DC currents and voltages, essential for characterizing semiconductor devices under test in laboratory and production environments. Compatible with standard lab racks and test benches, facilitating automated measurements and system calibration in high-frequency device evaluation. ## Application A 40 kHz to 40 GHz microwave bias unit designed for use in automated test systems for semiconductor and MMIC testing. It provides DC biasing of power transistors while simultaneously applying microwave signals, enabling high-accuracy device characterization. The unit offers integrated bias-Ts, active thermal protection, and multiple safety mechanisms including current limiting, voltage limiting, and power compliance. It supports synchronized pulsing operations for advanced device characterization and features programmable control via GPIB interface. Commonly used in production testing, device characterization, and R&D environments for power amplifier development. ## Accessories Requires external DC power supply with voltage range -50V to +50V and current capability up to 2A. Compatible with R&S ZVA/ZVT vector network analyzers via dedicated bias connection interface. Front panel features SMA female RF connectors for input/output, BNC connector for DC bias injection, and 4mm banana jack safety sockets for power supply connection. Includes internal bias tee networks with DC blocking capacitors. Supports bias current monitoring via built-in ammeter. Optional accessories include R&S ZV-Z52 DC bias cables, protective DC blocks, and RF attenuators for sensitive DUT protection. Firmware control via USB 2.0 Type-B interface for automated bias sequencing. ## Interface 1x BNC female RF input, 1x BNC female RF output, 1x 2.4mm male bias input, supply voltage 12VDC via 2.1mm barrel connector. ## Images - - - -