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An ICOM IC-7300 Radio Tuned to the 20 Meter Band. The ICOM IC-7300 is a multimode 6 meter, 4 meter (ITU Region 1 only) and HF base station amateur radio transceiver. [1] The IC-7300 was announced to the public at the Japan Ham Fair in 2015. [2] The radio has 100 watts output on CW, SSB, and FM modulations and 25 watts of output in AM. [3]
0.5 1/1 USB 2.0 Yes Yes Yes none SDRplay: RSPdx [99] Pre-built 1 kHz – 2 GHz 10 MHz 14<2 MHz 12<8 MHz 10<9.216 MHz 8>9.216 MHz No 20 MSPS with 12 built-in preselection filters and 3 antenna ports 0.5 1/1 USB 2.0 Yes Yes Yes none SDRplay: RSPduo [100] Pre-built 1 kHz – 2 GHz 10 MHz 14<2 MHz 12<8 MHz 10<9.216 MHz 8>9.216 MHz No
In parts of ITU Region 1 5 metres: 58.0–60.1 MHz: in parts of ITU Region 1 4 metres: 70–70.5 MHz: in parts of ITU Region 1 2 metres: 144–148 MHz 144–146 MHz ITU Region 1 1.25 metres 219–220 MHz Fixed digital message forwarding systems 222–225 MHz: US & Canada UHF; 70 centimetres: 420–450 MHz 430–440 MHz in ITU Region 1
The Icom IC-V82 is a VHF handheld transceiver with coverage in the two-meter band (144–146 MHz) and a maximum output power of 7 watts. [8] It was manufactured and sold by Icom from 2004 to 2014. [9] [10] [11] Following its discontinuation, Icom issued an advisory warning about counterfeit radios, including the IC-V82.
IQ imbalance is a performance-limiting issue in the design of a class of radio receivers known as direct conversion receivers. [a] These translate the received radio frequency (RF, or pass-band) signal directly from the carrier frequency to baseband using a single mixing stage.
A low code-rate close to zero implies a strong code that uses many redundant bits to achieve a good performance, while a large code-rate close to 1 implies a weak code. The redundant bits that protect the information have to be transferred using the same communication resources that they are trying to protect.
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Amateur repeaters in the 144–148 MHz band usually use a 600 kHz (0.6 MHz) separation, in the 1.25-meter band use a 1.6 MHz separation, in the 420–450 MHz band use a 5 MHz separation, and in the 902–928 MHz band use a 25 MHz separation. Systems in the 450–470 MHz band use a 5 MHz separation with the input on the higher frequency.