Programmable Attenuators Models 4246 & 4248 Phase Compensated GaAs Switched Programmable Attenuator 10 MHz to 2.5 GHz 4 Watts RoHS Low Insertion Loss, High IP3 MAXIMUM INSERTION LOSS (dB): Frequency Range 4246 4248 10 MHz - 1 GHz 1 - 2 GHz 2 - 2.5 GHz 8.0 9.0 10.0 10.5 12.0 13.0 INCREMENTAL ATTENUATION ACCURACY: CELL 0.25 0.50 dB +0.15 +0.15 +0.2 +0.2 1 2 4 8 16 +0.2 +0.2 +0.3 24 32 48 +0.4 +0.6 +0.8 Features Ideal for use in Wireless/Cellular, RF simulation/Emulation, & Communication Test Applications. o Broadband Performance - 10 MHz to 2.5 GHz o High IP3 and High Power Rating - Utilizes MESFET Switching o Flexible DC Voltage (+5 to +15 V) o Low DC Power Consumption - Ideal for portable battery powered equipment. o Custom Configurations including bus controlled attenuator subsystems Specifications NOMINAL IMPEDANCE: 50 Ω FREQUENCY RANGE: 10 MHz to 2.5 GHz MAXIMUM SWR: Frequency Range SWR 10 - 100 MHz 100 MHz - 200 MHz 200 MHz - 2.5 GHz 2.00 1.60 1.40 CELL CONFIGURATIONS: Model NO. Attenuation Number Cells Range/Steps (dB) 4246-63 6 63/1 4248-63.75 8 63.75/0.25 4248-103 8 103/1 Cell Increments (dB) 1, 2, 4, 8, 16, 32 0.25, 0.50, 1, 2, 4, 8 16, 32 1, 2, 4, 8, 16, 24, 48* MONOTONICITY: 10 MHz to 2.5 GHz (minimum 1 dB change) 3rd ORDER INTERMODULATION (IM3): -43 dBm typical, measured with two +27 dBm tones @ 869 MHz (f1) and 894 MHz (f2), the IM3 frequency being 844 MHz (2fl-f2). IP3 (input) = +58 dBm The input IP3 is derived from the following relationship: IP3 = 3(Pin-α)-IM3 + α 2 where α = the insertion loss (dB) at the IM3 frequency; Pin=single tone input power (dBm). POWER RATING: 4 Watts maximum SWITCHING TIME: 5 μsec. maximum OPERATING VOLTAGE: + 5 V to +15V OPERATING CURRENT: 25 mA typical INCREMENTAL RELATIVE PHASE: +5° between 0 and.25, 1, 2, 4, 8, 16 dB +10° between 0 and 32, 48 dB TEMPERATURE RANGE (Operating): 0°C to +70°C TEMPERATURE COEFFICIENT: <0.002/dB/dB/°C CONNECTORS: SMA female connectors - mate nondestructively with MIL-C-39012 connectors. CONTROL CONNECTOR: AMP-Latch 10 pin ribbon cable connector mates with AMP P/N 746285-1 (supplied with each unit) CONSTRUCTION: Housing: Connectors: WEIGHT: Aluminum Stainless steel body and beryllium copper contacts. Model 4246: Model 4248: 227 g (8.0 oz) 300 g (10.6 oz) *48 dB cell comprised of two 24 dB cells 245 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: 3/6/2013 Programmable Attenuators PHYSICAL DIMENSIONS: A B Model No. Control Connector J3 Pin Locations: B 82.50 (3.25) 122.50 (4.81) 4248-X 118.10 (4.65) 157.7 (6.21) TTL Conn PIN No. (J3) 4238-63 dB (Cell) 4240-63.75 dB (Cell) 4240-103 dB (Cell) 1 1 0.25 1 NOTE: 2 2 0.50 2 3 4 1 4 1. All dimensions are given in mm (inches) and are maximum, unless otherwise specified. 4 16 2 8 5 32 4 16 6 8 8 24 7 NC 16 48 8 NC* 32 NC* 9 +5 Vdc +5 Vdc +5 Vdc 10 COM COM COM NC = Not Connected * For Factory use only. 246 A 4246-X 2. Unit available with RoHS compliant materials, specify when ordering. CONTROL CONFIGURATION: Units are supplied with a built-in TTL interface. Each unit is supplied with a mating 10 pin connector (Amp 746285-1). Refer to Physical Dimensions for mating connector pin/wiring details. Two wires are specified for supply voltage and ground. The remaining wires will accept TTL control signals to activate or de-activate a particular attenuation cell. A TTL high will energize a cell to the high attenuation state, whereas a TTL low will maintain a cell in its zero attenuation state. 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