ARC-620/E Airborne Radio Communication System

Description

New generation of airborne radios are designed based on the SDR (Software Defined Radio) technology. Benefiting from the technology an appropriate infrastructure is provided for data transmission and establishing data link networks as well as improving technical specifications and stability in comparison with the old radios. ARC-620 is a VHF/UHF airborne Software Defined Radio in a way that it can be substituted with the ARC-1400 old radio properly. This radio can be installed inside various jetfighters, cargos, and helicopters. Proportionate to the plane, there are several different remote control systems installed inside the cockpit to perform control commands remotely General specifications Frequency rangeUHF: 225-399.975MHz, VHF: 108-173.975MHzChannel spacing8.33KHz/12.5KHz/25KHzModulation typeAM:A3E, FM:F3E, ECCM:FSKData transmission16kbps rate in the ECCM modeTransmitting specifications Output powerAM and FM modes: 20W ± 1dB ECCM mode: 100W peak ± 1dBInput audioLocal: Unbalanced with 150Ω impedance and -35dBm to +10dBm power with capability of microphone bias Line: Balanced with 600Ω impedance and -15dBm to +10dBm dynamic rangeModulation factorAM mode: at least 80% FM mode: ±5KHz frequency deviation in 25KHz channel spacing ±2.5KHz frequency deviation in 12.5KHz channel spacingModulation distortionmaximum 5% in environmental test condition: maximum up to 10% Audio frequency response300 to 3400 HzSide tonein the AM mode: audio sampling from the antenna RF output signal In the FM and ECCM modes: control signal sampling from the antenna RF output signalHarmonic rejectionbetter than -55dBcSpurious signalsbetter than -80dBcOutput power stabilityup to VSWR<2.5 against mismatchReceiving specifications Receiving sensitivityAM mode: -103dBm for more than 10dB SINAD in detecting the 1KHz signal modulated with 30% modulation factor FM mode: -108dBm for more than 10dB SINAD in detecting the 1KHz signal modulated with 2.5KHz deviation ECCM mode: -90dBm for maximum 4×10-2 bit rate errorSquelch sensitivitysetting the squelch ON/OFF point is Accomplished in the range of 5 to 25dB output SINADImage frequencies rejection-80dBIF frequency rejection-80dBSelectivityWIDEBAND: spurious signal rejection for ±25KHz frequency offset is at least 60dB NARROWBAND: spurious signal rejection for ±12.5KHz frequency offset is at least 40dBAudio distortionmaximum 5%Audio frequency response300 to 3400 HzReceiver input protectionReceiver input is protected against applying 1W (+30dBm) signal in/out of the band permanentlyEnvironmental Specifications Operating temperature-40°C to +65°CHumidityaccording to the MIL-STD~810F method (4 and 507)Vibration testcasual vibration in the range of 15~2000Hz for T/R with 0.03g2/Hz vibration amplitude in the range of 300 to 1000 Hz according to the MIL-STD-810FMechanical shock testaccording to the IDS810-17 and IDS1371 Iran Defense StandardElectromagnetic compatibilityMIL-STD-461EHeight testaccording to the IDS810-17 and IDS1371 Iran Defense Standard