Variable Attenuators Model 940-60 dc to 4.0 GHz Model 940-114 dc to 2.0 GHz Precision Continuously Variable Attenuators 5 Watts RoHS Choice of SMA or Type N Connectors DIRECT READING DIAL ACCURACY: Model EXPRESS www.argosysales.com 800-542-4457 ACCURACY* 940-60-XX 940-114-XX + 0.25 dB or 0.4% @ 2 GHz + 0.25 dB or 0.4% @ 1 GHz 940-60-XX-1 940-114-XX-1 + 0.5 dB or 1% @ 2 GHz + 0.5 dB or 1% @ 1 GHz *Whichever is greater. Features o Wide Variable Attenuation Range - Variable attenuation range of 60 dB for Model 940-60 and 114 dB for Model 940-114, with minimum insertion loss at 6 dB. o Approximately Linear Calibrated Dial - Direct reading dial individually calibrated in approximately linear 1 dB increments from 6 dB to full scale. o Rugged - Designed to meet the environmental requirements of MIL-A-24215. o Long Life - These variable attenuators offer a cycle life of up to 10,000 cycles. Optional models are also available to extend the life to 50,000 cycles. o Available Express Models: 940-60-11 940-60-33 940-60-33-1 Other models may be available for Express delivery. CHARACTERISTIC INSERTION LOSS, RESIDUAL: 6 dB nominal DIAL CALIBRATION (in 1 dB increments): Model 940-60: 6 to 66 dB Model 940-114: 6 to 120 dB DIAL INCREMENTS: 1 dB RESOLUTION OF SCALE: Model 940-60: ~ 115° Model 940-114: ~ 270° CYCLE LIFE: A cycle consists of a rotation from minimum to maximum and back to minimum Model 940-XX-XX : 10,000 Model 940-XX-XX-1: 50,000 PHASE SHIFT WITH CHANGE IN ATTENUATION: 1° per dB x f(GHz) maximum POWER RATING: 5 watts average to 40°C ambient temperature, derated linearly to 0 watts @ 85°C. 500 watts peak (5 μsec pulse width; 0.5% duty cycle). POWER COEFFICIENT: < 0.005 dB/dB/watt TEMPERATURE COEFFICIENT: <0.001 dB/dB/°C Specifications TEMPERATURE RANGE: NOMINAL IMPEDANCE: 50 Ω FREQUENCY RANGE: Model 940-60: Model 940-114: INCREMENTAL ATTENUATION RANGE: Model 940-60: 60 dB Model 940-114: 114 dB dc to 4.0 GHz dc to 2.0 GHz MAXIMUM SWR: Frequency Range (GHz) dc - 1 1-2 2-3 3-4 136 SWR Operating: Nonoperating: 0°C to +85°C -55°C to +125°C. FREQUENCY SENSITIVITY: Model 940-60: Model 940-114: 0.05 x A x (F - Fd) dB 0.1 x A x (F - Fd) dB A = Attenuation setting in dB, Fd = Dial cut frequency in GHz, F= Operation frequency in GHz TEST DATA: Test frequency for Model 940-60 is 2 GHz and 1 GHz for 940-114. Test data is available at additional cost. 1.50 1.60 1.70 1.80 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: 9/30/2012 Variable Attenuators Specifications-Con’t CONNECTOR: SMA or Type N connector per MIL-STD348 interface dimensions - mate nondestructively with MIL-C-39012 connector. INPUT (J1) OUTPUT (J2) Connector Options 11 SMA, Female SMA, Female 12 SMA, Female SMA, Male 22 SMA, Male SMA, Male 33 N, Female N, Female 34 N, Female N, Male 44 N, Male N, Male CONSTRUCTION: Aluminum body and stainless steel connector; gold plated beryllium copper contacts. Knob is included with each unit. WEIGHT: Net 1,570 g (3 lbs, 8 oz) MODEL NUMBER DESCRIPTION: Example: 940 - XX - XX - * Basic Model Number Attenuation Value (dB) Connector Options * Add -1 for long life version. ACCESSORIES ATTENUATOR STAND, MODEL 940 Z: This stand allows a user to easily mount any Model 940 for those bench applications. PHYSICAL DIMENSIONS: Model No. 940-XX-11 940-XX-12 940-XX-22 940-XX-33 940-XX-34 940-XX-44 DIM A 52.3 (2.06) 55.6 (2.19) 55.6 (2.19) 61.0 (2.40) 66.0 (2.60) 66.0 (2.60) DIM B 58.2 (2.29) 58.2 (2.29) 61.5 (2.42) 68.1 (2.68) 68.1 (2.68) 71.9 (2.83) NOTE: 1. All dimensions are given in mm (inches) and are maximum, unless otherwise specified. 2. Unit available with RoHS compliant materials, specify when ordering. 137 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: 9/30/2012