Fixed Coaxial Attenuators Model 272 High Reliability, N Connectors dc to 18.0 GHz 2 Watts Designed to meet requirements of MIL-DTL-3933, CLASS III/IV, N/S CONNECTORS: Precision Type N connectors per MILSTD-348 interface dimensions - mate nondestructively with MIL-C-39012 connectors. CONSTRUCTION: Stainless steel body and connectors; gold plated beryllium copper contacts. WEIGHT: Features o Rugged injection molded connectors. o Screened (Model 272S) and Non-screened (Model 272N) designs available. o Available in 1- 10, 20, 30 & 40 dB. o Test Data supplied at additional cost as follows: dB VALUE WEIGHT (Net) 1 - 10, 20, 30 40 70 g (2.6 oz) 100 g (3.6 oz) PHYSICAL DIMENSIONS:. Non-screened (N): Swept data plots of Attenuation and SWR across the frequency band. Screened (S): Swept data plots of Attenuation and SWR across the frequency band. Film, Standard data package includes lot record performace showing pass/fail quantities for all tests and test reports as applicable. Specifications Screening dc to 18.0 GHz Units are screened as follows: MAXIMUM DEVIATION OVER FREQUENCY: Nominal ATTN (dB) 1-9 10 20 30, 40 DIM A 57.9 (2.28) 68.1 (2.68) NOTE: All dimensions are given in mm (inches) and are maximum, unless otherwise specified. NOMINAL IMPEDANCE: 50 Ω FREQUENCY RANGE: dB VALUE 1-10, 20, 30 40 dB + + + + 0.30 0.40 0.50 0.75 MAXIMUM SWR: Frequency (GHz) SWR dc - 4 4-8 8 - 12.4 12.4 - 18 1.12 1.15 1.18 1.20 "N" versions: SWR Attenuation Peak Power "S" versions: Thermal Shock Monitored Thermal Cycle (MTC) Attenuation Conditioning Peak Power Attenuation SWR Radiographics MODEL NUMBER DESCRIPTION: POWER RATING: 5 watts average @ 25°C ambient temperature, derated linearly to 0.5 watt @ 125°C. 1 kilowatt peak (5 μsec pulse width; 0.25% duty cycle) Example: 272N - XX Attenuation Value (dB) POWER COEFFICIENT: <0.005 dB/dB/Watt TEMPERATURE COEFFICIENT: < 0.0004 dB/dB/°C TEMPERATURE RANGE: -55°C to +125°C 41a 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