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Write-up - Digital Signaling Fundamentals
I've written about digital signaling: including Frequency Shift Keying (including RTTY), Phase Shift Keying (PSK31 for example), Quadrature Phase Shift Keying (QPSK), and Quadrature Amplitude Modulati
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I've written about digital signaling: including Frequency Shift Keying (including RTTY), Phase Shift Keying (PSK31 for example), Quadrature Phase Shift Keying (QPSK), and Quadrature Amplitude Modulati
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By
KH6CP Craig Paul
· #418
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Military adopts APRS like functions
In SET 2019 some Windward Hams demonstrated networking functions of APRS and geographical situational awareness, not of an enemy's location, but of road obstructions. Some in EARC built an inexpensive
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In SET 2019 some Windward Hams demonstrated networking functions of APRS and geographical situational awareness, not of an enemy's location, but of road obstructions. Some in EARC built an inexpensive
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By
KH6CP Craig Paul
· #398
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More from the military about its use of HF
ALE frequency hopped link establishment Windows software can be found at http://hflink.com/software/ Multipsk has ALE-400 for fixed frequency link establishment. It simulates a full-duplex link. VARA
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ALE frequency hopped link establishment Windows software can be found at http://hflink.com/software/ Multipsk has ALE-400 for fixed frequency link establishment. It simulates a full-duplex link. VARA
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By
KH6CP Craig Paul
· #393
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The military renaissance in HF communications
Note the reference to HF for local communications! ---- In an online presentation to the Association of Old Crows on Aug. 6, Paul Denisowski, KO4LZ, described how communications satellites are vulnera
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Note the reference to HF for local communications! ---- In an online presentation to the Association of Old Crows on Aug. 6, Paul Denisowski, KO4LZ, described how communications satellites are vulnera
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By
KH6CP Craig Paul
· #391
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220 MHz nets via Diamond Head NH7ZD?
Thanks, Steve, Here's what I see from http://www.hamradiohawaii.com/oahu That Diamond Head location makes sense because from some "sweet spots" at which I can "hit" the Diamond Head APRS digipeater, K
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Thanks, Steve, Here's what I see from http://www.hamradiohawaii.com/oahu That Diamond Head location makes sense because from some "sweet spots" at which I can "hit" the Diamond Head APRS digipeater, K
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By
KH6CP Craig Paul
· #319
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220 MHz nets via Diamond Head NH7ZD?
Hello, Are there any nets hosted on the NH7ZD 220 MHz repeater near Diamond Head? Thanks! Craig/KH6CP
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Hello, Are there any nets hosted on the NH7ZD 220 MHz repeater near Diamond Head? Thanks! Craig/KH6CP
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By
KH6CP Craig Paul
· #317
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Configure for FM, push 1 button to "go digital"
Configure the radio for FM use (VHF/UHF) and push 1 button to "go digital". The entry level radio sells for $155 (DX Engineering) FM/YSF Yaesu FT-70dr Craig/KH6CP
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Configure the radio for FM use (VHF/UHF) and push 1 button to "go digital". The entry level radio sells for $155 (DX Engineering) FM/YSF Yaesu FT-70dr Craig/KH6CP
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By
KH6CP Craig Paul
· #310
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1.25m/220MHz usage
Hi, Tim, I'm only aware of a single 220 MHz repeater on island and I haven't tried to use it yet. It's in the vicinity of Diamond Head. Look for NH7ZD on the map. http://www.hamradiohawaii.com/oahu I
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Hi, Tim, I'm only aware of a single 220 MHz repeater on island and I haven't tried to use it yet. It's in the vicinity of Diamond Head. Look for NH7ZD on the map. http://www.hamradiohawaii.com/oahu I
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By
KH6CP Craig Paul
· #306
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YSF simplex QSOs yesterday and what YSF is
If you're not interested in digital voice on FM, delete this message now. A few of us on Oahu had QSOs yesterday. We enjoyed digital's clarity and superior reach, compared to other digital modes. The
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If you're not interested in digital voice on FM, delete this message now. A few of us on Oahu had QSOs yesterday. We enjoyed digital's clarity and superior reach, compared to other digital modes. The
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By
KH6CP Craig Paul
· #304
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Yaesu System Fusion QSO day - April 25th
Hi, Dave, Evan and I had the simplex QSO, exercised Group Mode (GM), and tested powers. I was using 1 watt and the Yaesu FT-2dr's "rubber duck" antenna. I was 5 feet below the terrain with some modera
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Hi, Dave, Evan and I had the simplex QSO, exercised Group Mode (GM), and tested powers. I was using 1 watt and the Yaesu FT-2dr's "rubber duck" antenna. I was 5 feet below the terrain with some modera
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By
KH6CP Craig Paul
· #303
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Yaesu System Fusion QSO day - April 25th
Thanks, Evan! See you on-the-air at 9. DG-ID 00. Shall we coordinate via the 147 repeater? Craig
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Thanks, Evan! See you on-the-air at 9. DG-ID 00. Shall we coordinate via the 147 repeater? Craig
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By
KH6CP Craig Paul
· #298
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Yaesu System Fusion QSO day - April 25th
Yaesu USA suggests a YSF simplex QSO day April 25th using the world-wide VHF frequency of 145.5625 MHz. (Yes, you have to change your frequency step to 6.25 kHz.) Any takers? I'm on the Windward side!
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Yaesu USA suggests a YSF simplex QSO day April 25th using the world-wide VHF frequency of 145.5625 MHz. (Yes, you have to change your frequency step to 6.25 kHz.) Any takers? I'm on the Windward side!
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By
KH6CP Craig Paul
· #296
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