Fixed Coaxial Attenuators Model 276 High Reliability, N Connectors dc to 18.0 GHz 25 Watts Designed to meet requirements of MIL-DTL-3933, CLASS IV, N/S CONNECTORS: Type N connectors per MIL-STD-348 interface dimensions - mate nondestructively with MIL-C39012 connectors. Description Options 3 Type N Female 4 Type N Male Features CONSTRUCTION: Black, finned aluminum body, stainless steel connectors with gold plated beryllium copper contacts. o Rugged injection molded connectors. WEIGHT: 110 g (4 oz.) maximum o Screened (Model 276S) and Non-screened (Model 276N) designs available. PHYSICAL DIMENSIONS: o Available in 3, 6, 10, 20 & 30 dB. o Test Data supplied at additional cost as follows: 44.4 [1.75] 22.9 [.90] 15.0 [.59] Non-screened (N): Swept data plots of Attenuation and SWR across the frequency band. 38.8 [1.53] Screened (S): Swept data plots of Attenuation and SWR across the frequency band. Standard data package includes film, lot record performace showing pass/fail quantities for all tests and test reports as applicable. Connector N Male N Female Specifications NOMINAL IMPEDANCE: 50 Ω FREQUENCY RANGE: NOTE: All dimensions are given in mm (inches) and are maximum, unless otherwise specified. dc to 18.0 GHz Screening MAXIMUM DEVIATION OVER FREQUENCY: Nominal ATTN (dB) 3, 6, 10, 20 30 DIM A 24.1 (0.95) 19.0 (0.75) dc-4 GHz 4-8 GHz 8-18 GHz + 0.30 + 0.60 + 0.60 + 0.75 + 1.00 + 1.00 MAXIMUM SWR: Frequency (GHz) SWR dc - 4 4-8 8 -12 12 - 18 1.15 1.20 1.25 1.40 POWER RATING (mounted horizontally): 25 watts average (bi-directional) to 25°C ambient temperature, derated linearly to 2.5 watts @ 125°C. 3, 6 dB: 1 kilowatt peak (5 μsec pulse width; 0.05% duty cycle), 10, 20 30 dB: 2 kilowatt peak (5 μsec pulse width; 0.05% duty cycle). Units are screened as follows: "N" versions: SWR Attenuation Peak Power "S" versions: Thermal Shock Monitored Thermal Cycle (MTC) Attenuation Conditioning Peak Power Attenuation SWR Radiographics MODEL NUMBER DESCRIPTION: Example: 276N - XX Attenuation Value (dB) POWER COEFFICIENT: <0.0006 dB/dB/watt TEMPERATURE COEFFICIENT: <0.0004 dB/dB/°C TEMPERATURE RANGE: -55°C to 125°C 41d Basic Model Number N = Non-screened S = Screened 5305 Spectrum Drive, Frederick, MD 21703-7362 s TEL: 301-846-9222, 800-638-2048 s Fax: 301-846-9116 web: www.aeroflex.com/weinschel s email: [email protected] Revision Date: 6/3/2014