60.012 Hf Transceiver

Transcript

60.012 HF TRANSCEIVER Reviewed on : 23 October 2007 Specifications of Computer Hardware and Peripherals may be taken from latest DGS&D rate contract Equipment Specification: HF TRANSCEIVER Version 1 60.012-1/7 60.012 HF TRANSCEIVER Approval Date: 31 July 1998 Version: 1 Purpose The HF transceiver will be used for verbal dissemination of hydrological data. Conditions & Requirements • • • • • • • • • • • • • • • • • • • • • • The HF transceiver shall be of such a design that it functions reliably under the prevailing environmental and operational conditions. The HF transceiver shall be easy to operate and maintain. The HF transceiver shall be supplied with the accessories as needed for effective deployment. The HF transceiver shall have an expected technical lifetime of not less than 10 years. Operator’s and technical manuals, related to the type and model of the HF transceiver and the accessories shall be part of the delivery. A hand held microphone with PTT button shall be part of the HF transceiver. The HF transceiver shall be fitted with the frequency channels that are required to cover the specified ranges under all weather conditions. The power specification shall meet the requirements for the maximum range of operation, taking the local conditions into account. The transmitter output power specification may have to be adjusted to reliably cover the required range. The vendor shall access the transmitter output power requirements and recommend accordingly. Transmitter output power may be operator selectable in say two levels to adjust for the prevailing conditions. Reduced power is used unless signal loss is too high and power has to be increased. On all electrical equipment, proper fuses should protect against damage due to overload, short circuit, open antenna connection etc. It should be virtually impossible to damage the electronics by any user error or cable damage. The equipment shall be adequately protected against damage, e.g. by use of surge arresters, transient absorbers and careful grounding. Proper measures shall be implemented to prevent fire due a direct lightning strike on antenna and/or antenna cable. The HF transceiver shall be moisture proof and adequately protected against corrosion both to mechanical and electrical components inside and outside the housing. The antenna shall be of a long wire type. The antenna shall be suspended between two poles in a slightly tilted orientation. The poles shall be of the proper height, and at a proper separation. If guy wires are used to maintain the poles in vertical position, insulators may be required. On the ground, or just below the ground, a conductive grid/net is required to act as a reflector for the radio waves. The grid shall be properly connected to electrical ground and earth. The grid materials and design shall resist damage caused by inundation, interaction with the soil, rodents, etc. The antenna cable and its connections to both HF transceiver and antenna shall be of a low loss type. All antenna and cable materials used shall be corrosion proof. Cables and connectors shall be waterproof and the antenna cable shall be properly protected against damage, wear and tear, domestic animals, rodents. The antenna including its support structure and the antenna cable shall be solid enough to withstand all local weather conditions including high wind load. Equipment Specification: HF TRANSCEIVER Version 1 60.012-2/7 60.012 HF TRANSCEIVER Approval Date: 31 July 1998 • • • • • • • Version: 1 Power shall be supplied by a mains power supply/charge controller with backup battery. The charge and discharge capacities of the charge controller as well as the battery capacity shall match the power demand of the radio transmitter and the occurrence and duration of the mains power disruptions. The charge controller shall maintain the battery in optimal condition. The charge controller shall protect the battery against depletion and over charge. The charge controller shall support 'drip' charging when the battery is fully charged. The battery shall be kept in an acid proof box/container, which is adequately ventilated. Connections to the battery and all components on the battery and the container, both at inside and outside of the container, shall be fully acid and corrosion proof. Equipment Specification: HF TRANSCEIVER Version 1 60.012-3/7 60.012 HF TRANSCEIVER Approval Date: 31 July 1998 A. Version: 1 15 Watt HF Transceiver Specifications 1. general frequency range number of channels frequency control frequency accuracy type of operation modes of operation roles input voltage input current operating temperature storage temperature relative humidity 2. transmitter RF power output spurious and harmonic suppression unwanted side band inter-modulation distortion products level microphone impedance keying speed 3. receiver sensitivity (CW & A3J) sensitivity IF rejection image rejection selectivity (CW) selectivity (SSB) AF response AF output ≤2 to ≥30 MHz ≥10 (all preset) Crystal ±10 ppm Simplex SSB, AM, A1 Manpack Vehicular fixed antenna whip, dipole and slant wire. 24V nominal (negative grounded) Tx CW and A3H ≤2.4 A, A3J ≤1A Rx ≤120 mA. 20 to 55°C -40 to 70°C. 95% @ 40°C. 2 to 15 MHz; 15 W in SSB(PEP) and CW (average) in 50 Ω 15 to 30 MHz >7.5 W in SSB, PEP and CW (average) in 50 Ω 45 dB minimum suppression by 40 dB minimum less than 25 dB corresponding PEP level in SSB mode 300 Ω (Unbalanced) 25 WPM ≤2 µV emf for 20 dB(S+N)/N ratio. ≤8 µV emf 50% modulated at 1 kHz for 20 dB (S+N)/N ratio ≥60 dB 2 to 21 MHz; 60 dB minimum, 21 to 30 MHz; 40dB minimum. >300 Hz at -6 dB, <2.5 kHz at -60 dB >2.7 kHz at -6 dB, <4.5 kHz at -60 dB within 6 dB over 400 Hz to 3 kHz. 0.5 mW into 150 Ω Accessories • • • • • telephone hand set long wire antenna kit low loss coaxial cable 25 m antenna matching unit ground peg assembly Equipment Specification: HF TRANSCEIVER Version 1 60.012-4/7 60.012 HF TRANSCEIVER Approval Date: 31 July 1998 Version: 1 Consumables • adequate numbers of spare fuses, of all types used in the HF transceiver and the charge controller Equipment Specification: HF TRANSCEIVER Version 1 60.012-5/7 60.012 HF TRANSCEIVER Approval Date: 31 July 1998 B Version: 1 100 W/125 W HF Transceiver Specifications 1. general frequency range number of channels frequency control frequency stability type of operation modes of operation (voice) antenna 2 to 30 MHz >500 synthesiser ±1 ppm Simplex SSB (J3E, USB), AM (H3E) dipole and slant wire. supply voltage operating temperature relative humidity 24V nominal (negative grounded) 0 to 50°C 95% @ 40°C. 2. transmitter RF power output spurious and harmonic suppression carrier suppression unwanted side bands intermodulation distortion protection microphone impedance keying speed 3. receiver sensitivity (CW & A3J) sensitivity IF rejection image rejection selectivity (CW) selectivity (SSB) AF response AF output 2 to 15 MHz; 125 W in SSB (PEP) and CW (average) in 50 Ω 15 to 30 MHz >100 W in SSB, PEP and CW (average) in 50 Ω 45 dB minimum 50 dB minimum suppression by 45 dB minimum less than 25 dB corresponding PEP safe under all load conditions 300 Ω (Unbalanced) 25 WPM 2 µV emf for 30 dB(S+N)/N ratio. 8 µV emf 50% modulated at 1 kHz for 30 dB (S+N)/N ratio 60 dB minimum 2 to 21 MHz; 60 dB minimum, 21 to 30 MHz; 40dB minimum. >300 Hz at -6 dB, <2.5 kHz at -60 dB >2.7 kHz at -6 dB, <4.5 kHz at -60 dB within ±3 dB over 400 Hz to 3 kHz. 0.5 mW into 150 Ω, 2 W into 4 Ω Accessories • • • • • • telephone hand set long wire antenna kit low loss coaxial cable, ≥20 m conductive grid/net under antenna 2 core power cable antenna matching unit Equipment Specification: HF TRANSCEIVER Version 1 60.012-6/7 60.012 HF TRANSCEIVER Approval Date: 31 July 1998 Version: 1 Consumables • adequate numbers of spare fuses, of all types used in the HF transceiver and the charge controller Equipment Specification: HF TRANSCEIVER Version 1 60.012-7/7