The status bar at the bottom of the main dialog contains a status text message area to the left and a progress bar to the right. When FLARQ is in the Beacon mode the words BEACON ON, and the green light on the Beacon button will be lit. If you find that stations are having difficulty connecting to your beacon call then you probably need to increase the time between beacons to avoid ARQ collisions similar to doubling on voice. The minimum is 15 seconds and the maximum 300 seconds. The default beacon interval is 60 seconds. You can stop the beacon at any time it is in the count down mode by simply pressing that button or by pressing the Abort button. During the silent period between beacon transmissions the Beacon button will show the count down timer. The beacon will repeat with a wait time between transmissions set by the Beacon interval in seconds on the Configure dialog. Pressing the "Beacon" button sends both the text and T/R commands to the modem program. The state of the connection also appears in plain text to the right of the diamond indicator. The receiving station can then press the "Connect" button and the connect process begins. Upon receipt of the beacon frame a monitoring FLARQ will automatically insert the sending stations callsign into the edit box to the right of the "Connect" button. The "Beacon" button will cause the transmission of the ARQ equivalent of a "CQ" frame which can be easily recognized by a receiving station. Olivia does not allow the transmission of the control codes required for FLARQ.ĪRQ data is sent in data frames which clearly delineate from whom the data is being sent, it's purpose or type, the actual data, and a checksum value. Please note that Olivia IS NOT compatible with FLARQ transmissions. MT63 - all baud rates, FLARQ timing should be increased to accommodate mt63 latency THOR all baud rates, 11 or faster recommended Other developers wishing to duplicate or expand upon the FLARQ ARQ implementation may freely do so.įLARQ can be used with the following digital modem as the transport layer: The ARQ specification and the source code for FLARQ are GPL licensed. The ARQ transfer must take place between two systems both of which are running the FLARQ / FLDIGI. If you attempt to run FLARQ without FLDIGI already running you will view an information window asking you to first start FLDIGI. If MultiPsk is used it must be set to the "socket" mode before executing FLARQ. FLARQ is a client program and FLDIGI is a server program.įLARQ will not execute unless either FLDIGI (preferred) or MultiPsk is already running on the host computer. The socket interface requires that one program act as the server and the other the client. Program data exchange between FLARQ and FLDIGI is accomplished using a localhost socket interface. The interaction between FLARQ and FLDIGI requires no operator intervention. It is capable of transmitting and receiving frames of ARQ data via either FLDIGI or MultiPsk on Windows, or FLDIGI on Linux/Macintosh OSX. It is not needed to run fldigi, which is why we included the Ad-Supported notice.įldigi supports CW, PSK, MFSK, RTTY, Hell, DominoEX, Olivia, and Throb.Fast Light Automatic Repeat re Quest is a file transfer application that is based on the ARQ specification developed by Paul Schmidt, K9PS. This protocol is unicast and connection-based and seamlessly integrates with existing email clients such as Microsoft Outlook, Mozilla Thunderbird, and Sylpheed. ![]() ![]() It can also be used as a stand-in for radio emergency communications when other communication systems fail due to a natural disaster or power outage.ĭuring setup, you have the option to include flarq (same author), an ARQ specification, K9PS to transfer emails, text files, images, and binary files over the radio. Using fldigi will be possible for amateur radio operators to communicate worldwide with limited power consumption. It is mostly used by amateur radio operators that need to connect the microphone and headphone connections of an amateur radio SSB transceiver or an FM two-way radio to the computer's headphone and microphone connections. It allows an ordinary computer's sound card to be used as a simple two-way data modem. Fldigi is designed to help amateur HAM radio operators quickly calibrate sound cards to a specific time signal as well as perform frequency measurement tests and more.
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