Fixed Coaxial Attenuators Model 274 High Reliability, SMA Connectors dc to 18.0 GHz 2 Watts Designed to meet requirements of MIL-DTL-3933, CLASS III/IV, N/S CONNECTORS: SMA connectors per MIL-STD-348 interface dimensions - mate nondestructively with MIL-C-39012 connectors. CONSTRUCTION: Passivated stainless steel body and connectors; gold plated beryllium copper contacts. WEIGHT: Features o Rugged injection molded connectors. o Screened (Model 274S) and Non-screened (Model 274N) designs available. o Available in 0 - 20 in 0.5 dB steps, 30 & 40 dB. o Test Data supplied at additional cost as follows: dB VALUE WEIGHT (Net) 0 - 20 30, 40 10 g (0.35 oz) 20 g (0.70 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. dB VALUE 0 -10, 20 30, 40 Specifications NOMINAL IMPEDANCE: 50 Ω FREQUENCY RANGE: dc to 18.0 GHz NOTE: All dimensions are given in mm (inches) and are maximum, unless otherwise specified. MAXIMUM DEVIATION OVER FREQUENCY: Nominal ATTN (dB) 0-2 3 -6 7 - 12 20 30, 40 DIM A + 0.5 (0.02) STD Prefix F Prefix M 30.5 (1.20) 29.7 (1.17) 32.3 (1.27) 47.0 (1.85) 46.2 (1.82) 47.7 (1.88) dB + + + + + 0.50 0.30 0.50 0.70 1.00 MAXIMUM SWR: Frequency (GHz) SWR dc - 4 4-8 8 - 12.4 12.4 - 18 1.15 1.20 1.25 1.35 POWER RATING: 2 watts average to 25°C ambient temperature, derated linearly to 0.5 watts at 125°C. 500 watts peak (5 μsec pulse width; 0.2% duty cycle). Screening Units are screened as follows: "N" versions: SWR Attenuation Peak Power "S" versions: Thermal Shock Monitored Thermal Cycle (MTC) Attenuation w/Parts Assembly Verification (PAV) Conditioning Peak Power Attenuation SWR Radiographics MODEL NUMBER DESCRIPTION: Example: 274N - XX POWER COEFFICIENT: < 0.005 dB/dB/watts TEMPERATURE COEFFICIENT: < 0.0004 dB/dB/°C TEMPERATURE RANGE: -55°C to +125°C 41c Basic Model Number Attenuation Value (dB) 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: 1/27/2014