--- type: product schema_version: 1 stock_number: "93399-9" canonical_url: "https://www.artisantg.com/93399-9/Cobham-53-249" json_url: "https://www.artisantg.com/93399-9/Cobham-53-249.json" generated_at: "2026-11-07T09:12:14.369Z" last_updated: "2026-10-14T13:00:51.160-05:00" --- # Cobham / Aeroflex / IFR 53-249 2nd LO Summing Loop Module _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: Cobham - Model: 53-249 - Condition: Used and in Excellent Condition - Price: $320.00 USD - Availability: In stock, 1 available - Warranty: 1-Year Warranty with 30-Day Return Guarantee - ITAR restricted: No - Shipping weight: 8 lb, estimated - Shipping dimensions: 14X10X10 in, estimated ## Categories - Test Equipment > Electrical Test > Electrical Parts (primary) - Military and Embedded Equipment > Embedded & Industrial > Other Modular ## Details Part Numbers: 53-249, 53-248G ## Function Performs second local oscillator frequency summing and mixing operations in heterodyne receiver architectures. Combines multiple LO signals through active summing circuitry to generate precise intermediate frequencies for downconversion stages. Provides phase-coherent signal addition with controlled amplitude weighting and isolation between input ports. Integrates with synthesizer modules and frequency conversion chains in test equipment and communication systems. Features impedance-matched RF interfaces, typically 50-ohm, with frequency-dependent gain compensation. Enables multi-band receiver operation and spurious signal rejection through selective frequency plan implementation. ## Images - - - -