The Marconi IFR Aeroflex 2186 is a programmable attenuator for precise RF and microwave signal level control across DC to 5 GHz. It delivers 0 to 130 dB attenuation in 1 dB steps under microprocessor control, optimized for automated test equipment environments requiring remote programming and signal path switching.
Technical Specifications
Frequency Range: DC to 5 GHz
Attenuation: 0 to 130 dB, 1 dB increments
Interface: IEEE-488.2 (compliant with SH1, AH1, T6, L4, SR1, RL1, PP0, DC1, DT0, C0, E2 subsets per IEEE Std. 488.1)
Power Handling: 1 W continuous; 50 W pulsed
Auxiliary Control Output: 16 lines, 0.5 A sink capability per line, 35 V withstand voltage
Pulse Duration Options: 10 ms, 20 ms, 30 ms, 40 ms, or 50 ms (software selectable)
Calibration: Internal calibration with international standard traceability; user calibration data stored in non-volatile memory; corrected attenuation mode available
Control: Microprocessor-based with direct keyboard operation; all functions except supply switch remotely programmable via GPIB
Safety: IEC 348, HD401 (Class 1 portable equipment); Pollution Degree 2; Installation Category 2 supply
– Key Features
• Wide 0–130 dB attenuation range in 1 dB steps accommodates both high and low signal level requirements
• Diode clamp protection on auxiliary output lines guards against inductive load transients
• 16 independent relay-driver lines configured for static or pulsed operation with front-panel or GPIB status visibility
• Corrected attenuation mode reduces measurement uncertainty by applying internal calibration coefficients
• Non-volatile user calibration memory enables system-specific offset storage and post-calibration traceability
– Typical Applications
• RF/microwave signal conditioning in automated test systems
• Receiver sensitivity and dynamic range characterization
• Transmitter power level validation across 5 GHz bandwidth
• ATE environments requiring synchronized attenuation and relay switching
– Compatibility & Integration
IEEE-488.2 GPIB interface enables direct integration into test racks and multi-instrument systems. Auxiliary output supports both relay actuation and external logic control. Microprocessor architecture permits standalone operation or seamless incorporation into larger ATE frameworks.
