(A NCPA band plan footnote for this frequency reads, "For digital modes other than AX.25 packet. A frequency within a NARCC digital sub-band that is designated "miscellaneous digital" by NCPA.Frequencies (channels) designated "simplex" by NARCC.In my group of fldigi experimenters, in late 2019, we have used the following kinds of frequencies: However, there is no reason why digital communications cannot be made on frequencies or "channels" designated "simplex" or even on repeaters (with the assent of the repeaters' trustees), as FM transmissions are expected there. Within the sub-bands marked "digital" or similar in the NARCC band plans, the Northern California Packet Association ("NCPA") provides band plans for digital use. NARCC sets all 2-meter frequencies at or below 144.300 aside for "weak-signal" transmissions, which excludes FM. In Northern California, band plans are provided by the Northern Amateur Relay Council of California ("NARCC"). Local band plans recommend specific usage patterns on the VHF and UHF bands, and they vary by locality.US Federal regulations prohibit anything except CW at or below 144.100 MHz on the 2-meter band and at or below 50.100 MHz on the US 6-meter band, but otherwise are OK with digital emissions of the sort fldigi produces anywhere on the VHF/UHF bands (50 MHz and up in frequency).Frequency: tune your transceiver to a VHF or UHF frequency on which FM digital signals will comply with Federal regulations and with local band plans.Technician or higher Amateur Radio license? Yes.Computer with installed fldigi software? Yes.These settings apply to the use of any interface method. In this brief exercise, you will configure your transceiver to work properly with fldigi in the context of this course, using FM mode on the VHF and UHF bands. If you have a Tigertronics™ SignaLink interface device, you will go on to the later exercises in this step, configuring that device (Exercise 1.4.4) and using it on the air (Exercises 1.4.5 and 1.4.6). Then you will operate fldigi on the air with yourself as the interface between your transceiver and your computer (Exercises 1.4.2 and 1.4.3). In this step in the course, Step 1.4, you will first configure your transceiver (Exercise 1.4.1). You may be happier, however, using an electronic interface, with which audio travels by cables and PTT (putting the rig into transmit) is automatic. Or, if you simply don't want to get into this issue right now, you can also continue with the next step this step is not a prerequisite for anything that follows.Īn "interface" can be as simple as your hand or a shelf or bracket holding an "HT" (handheld transceiver) in the correct position and your fingers pressing and releasing the PTT (push-to-talk) button at the correct times. If you don't meet those requirements, you can skip Step 1.4 and continue with the next step. This step of the course requires that you have an Amateur Radio license and an Amateur Radio transceiver. switching the transceiver between receive and transmit at the correct times.moving audio effectively between the transceiver and fldigi, and.The only absolutely necessary elements of that "interface" are: This step of this course, Step 1.4, deals with the "interface" between your radio transceiver and the device on which you are running fldigi. next page Step 1.4: Interfacing your transceiver and fldigi device Background.The ‘fldigi-versioni386.dmg’ and ‘fldigi-versionx8664.dmg’ links are for the 32 bit and 64 bit macintosh install files respectively. The ‘fldigi-versionsetup.exe’ link is the windows binary file. The ‘fldigi-version-tar.gz’ link is the source code for the Linux version of fldigi.Fldigi (short for Fast light digital) 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 transceiver or an FM two way radio to the computer's headphone and microphone connections, respectively.All digital modes are supported by the program, including CW, MFSK, PSK, Hell, RTTY, Olivia, DominoEX, and Throb. It enables you to read incoming signals, control the transmitter, and tune high-frequency propagation. Fldigi is a software tool that lets you make a radio station out of your computer.
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