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A terminal node controller (TNC) is a device used by amateur radio operators to participate in AX.25 packet radio networks. It is similar in function to the Packet Assembler/Disassemblers used on X.25 networks, with the addition of a modem to convert baseband digital signals to audio tones. [1]
Rig control companion program Flarq: Automatic Repeat reQuest companion program for Fldigi GNU Radio: GPL: Windows, macOS, Linux: software-defined radio and signal processing SDRangel: GPL: Windows, macOS, Linux: software-defined radio SDR# Freeware Windows software-defined radio receiver SDR++: GPL: Windows, macOS, Linux, Android: software ...
Each channel symbol conveys one sync bit (LSB) and one data bit (MSB). Duration of transmission is 162 × 8192 ⁄ 12000 = 110.6 s. Transmissions nominally start one second into an even UTC minute: e.g., at hh:00:01, hh:02:01, etc. Minimum S/N for reception is around –34 dB on the WSJT scale (2500 Hz reference bandwidth).
In a radio antenna, the feed line (feedline), or feeder, is the cable or other transmission line that connects the antenna with the radio transmitter or receiver.In a transmitting antenna, it feeds the radio frequency (RF) current from the transmitter to the antenna, where the energy in the current is radiated as radio waves.
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Defense will rule the day in this one, so finish your errands early by Saturday evening, because this one could come down to the wire. The action before that might not be too exciting, though. 4.
Fldigi (short for Fast light digital) [4] is a free and open-source program which allows an ordinary computer's sound card to be used as a simple two-way data modem.The software is mostly used by amateur radio operators who connect the microphone and headphone connections of an amateur radio SSB or FM transceiver to the computer's headphone and microphone connections, respectively.
Her assailant strangled her nearly unconscious twice. Morgan Metzer: It's the worst feeling in the world to think you're dying. And you feel like you're going to be tortured beforehand.