![]() ![]() ![]() will sync T/R buttonģ2 FLDigi Intro Type or use Macro to populate text, Before or during TXĬlick to select signal on waterfall RX/TX ToggleĬQ CQ CQ DE K0AAA K0AAA K K0AAA DE AA0CN AA0CN K AA0CN 5A WTX 5A WTX DE K0AAA K K0AAA DE AA0CN 1A MN 1A MN SK …Ĥ0 N1MM Logger+ Logger Radio Interface Digital Interface Packet / AX.25 / APRS USB, FM for VHF/UHF APRS on FM MT63 High bandwidth, Fast Audio coupling for ARES: MT WPM Waterfall/Audio source:Ģ9 FLDigi Rig Control Rig will display, Freq. JT-65 Weak Signal / QRP UTC time synched, ~50 seconds, 13 chars WSJT Software by K1JT SSTV Many different modes MMSSTV Software Waterfall/Audio source:ġ9 Waterfall Signal Identification: Other Modes, VHF/UHF Many tones 2N, 4 thru 256 8Hz – 2000Hz Bandwidth Good for poor propagation and High QRM Use USB Mode Contestia: An Olivia variant, twice as fast Waterfall/Audio source:ġ8 Waterfall Signal Identification: Other HF Modes Keying is done by one tone at different frequencies MFSK8: 8 tones, 7.8 baud MFSK16: Bd 154Hz / 218Hz bandwidth Waterfall/Audio source:ġ6 Waterfall Signal Identification: THROB / THROBXĩ or 11 tones 1 to 4 Baud (10-40 WPM) Throb 1: 72Hz Bandwidth Throb 4: 144Hz Bandwidth ThrobX 4: 94Hz BW ThrobX 4: 188Hz BW Waterfall/Audio source:ġ7 Waterfall Signal Identification: Olivia / Contestia ![]() Uses 2 (Binary), 4 (Quad) or 8 “Phase Constellations” BPSK-31 most common, “typing speed” Baud Narrow ~60Hz bandwidth Usually used in USB mode Common Freqs: 3.580, 7.040,, ,, ,, MHz Waterfall/Audio source:ġ5 Waterfall Signal Identification: Multi-Freq. Text-Only Baudot Encoding Two distinct carriers (Mark and Space) RTTY-45 : 200 Hz bandwidth, 45 Baud Transceiver often set to LSB for RTTY-45, may be used in USB Waterfall/Audio source:ġ4 Waterfall Signal Identification: Phase Shift Keying (PSK) Most Common HF Voice No constant carrier ~ Hz bandwidth Waterfall/Audio source:ġ3 Waterfall Signal Identification: Radio Teletype (RTTY) Voice/Music/Broadcast Single Carrier with Products Waterfall/Audio source:ġ2 Waterfall Signal Identification: Single Sideband (SSB) On/Off encoding Single Carrier Narrowest Bandwidth Waterfall/Audio source:ġ1 Waterfall Signal Identification: Amplitude Modulation High Duty Cycle, turn down the power! Some AutoTuners have Digi power limits Volume-sensitive (driving radio direct, ALC) Some radios have a “Digital” mode, won’t take USB audio if not in Digi Mode Sometimes tricky setup for PC Interface (You kept the manual, right?) Use ferrites to reduce hardware issues Limitless potential!įLDigi Intro Decoded Text Out Waterfall and Current Freq (Audio)įLDigi Intro Current Mode & VFO Freq Current Freq and Log Info Note: Current Frequency = (VFO Freq ±Offset) + for USB, - for LSBġ0 Waterfall Signal Identification: Carrier Wave (CW) / Morse RX/TX Control Signal PTT Pin/Gnd PC “Mic” or “Line In” Radio RXOut Speaker PC “Speaker” Radio TX MIC In ![]() 1 Overview of Digital Modes, FLDigi and N1MM Logger+Ĭollin Howe AA0CN Rochester Amateur Radio Club - Relevant Links on Last SlideĢ Digital Modes Mechanism of communication using discrete signals (Non-Infinite, repeatable) Often uses specialized hardware/software (Teletype Machine, Modem, Computer) Can be much faster than voice (at the expense of reliability) Can be much slower (can work in low-signal conditions at expense of speed) CW: Simplest “Digital” mode, high reliabilityĭigital Modes often use Computer through a purpose-built interface using the computer’s Sound Card as a modem Many Radios have USB control built-in Signalink USB control interface Homebrew COM / Sound Card interface: PTT On/Off, RX Audio, TX Audio KF5INZ Easy Digi Interface: Or just use speaker and mic, and manually switch TX/RX! ![]()
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