Category: Digital

via the ARRL: New D-Star ONE Nanosatellites Launched; Es’hail Testing Under Way

A December 27 Soyuz launch deployed the two German Orbital Systems D-Star ONE satellites D-Star ONE – Sparrow and D-Star ONE – iSat. Beacons have been successfully received from both satellites, which carry a D-Star repeater with an uplink at 437.325 MHz and downlink at 435.525 MHz. The D-Star ONE – Phoenix 3U CubeSat, launched last February, was […]

WSJT-X 2.0 Full Release Now Available; FT8 Enthusiasts Urged to Upgrade Now

The WSJT-X 2.0 software suite has been released, and developer Joe Taylor, K1JT, is urging FT8 and MSK144 users to upgrade to what will become the new standard, because the FT8 and MSK144 protocols have been enhanced in a way that is not backward compatible with older versions of the program. That includes any version 1.9 releases. “The new […]

via the ARRL: New Beta Version of WSJT-X is Now Available, Mock FT8 Contest Set

A new WSJT-X “release candidate,” version 2.0.0-rc4, now is available, and the version 2.0 Quick Start Guide has been revised and extended. The developers urge anyone upgrading to the new version to read the release notes thoroughly, since the upgrade requires users to change operator settings, so the software may not work “out of the box” when upgrading from […]

via the ARRL: FT8 to be Permitted in 2019 ARRL RTTY Roundup

The ARRL Contest Branch has announced that participants in the 2019 ARRL RTTY Roundup will be permitted to use the new FT8 protocol, which is part of the WSJT-X software suite. The RTTY Roundup takes place January 5 – 6, 2019. A “Practice Contest” has been set for Wednesday, October 24, in North American time zones. Details are below. […]

via the ARRL: Correction: Practice Contest for ARRL RTTY Roundup Participants Planning to Use FT8

A 1-hour “practice contest” will be held next week on Thursday, October 25, 0200 – 0300 UTC (Wednesday, October 24, in North American time zones). Use dial frequency 7.078 kHz, moving up in 2 kHz increments if interference is too great. The date was incorrect in this week’s edition of The ARRL Letter. To participate you […]

via the ARRL: FCC Grants ARRL Temporary Waiver Request to Permit PACTOR 4 Use in Hurricane Relief

The FCC has granted an ARRL request for a temporary waiver of Section 97.307(f) of the FCC’s Amateur Service rules to permit the use of PACTOR 4 digital mode for Amateur Radio communication within the continental US related to Hurricane Florence relief. The grant extends through Tuesday, September 18, and a formal order addressing the […]

via the ARRL: Digital Mobile Radio Hotspots May Be Interfering with Satellite Uplinks, AMSAT Reports

This week, AMSAT News Service (ANS) cited an August 27 report from AMSAT Vice President-Operations Drew Glasbrenner, KO4MA, saying that a digital mobile radio (DMR) signal has been interfering with the AO-92 (Fox-1D) satellite’s 435.35 MHz uplink frequency. Glasbrenner said hotspots, repeaters, terrestrial simplex, and “anything not satellite” should never transmit in the segments 145.8 […]

via the ARRL: An Amazing Recovery: ARISS Packet System Revives

Similar to the AO-7 satellite resurrection several years ago, the Amateur Radio on the International Space Station (ARISS) packet radio system on the International Space Station (ISS) has begun working again. NASA ISS Ham Radio Project Engineer Kenneth Ransom, N5VHO, said over the weekend that reports he’d received indicated that the NA1SS packet signal returned in […]

via the ARRL: Significant Changes in Store for FT8 and MSK144 with WSJT-X Version 2.0

WSJT-X co-developer Joe Taylor, K1JT, has announced that major changes are coming to the FT8 and MSK144 digital protocols when WSJT-X version 2.0 arrives in a few months. Taylor said version 2.0 should be ready for prime time by January. “Much of the necessary programming is finished,” Taylor said in a post to the Packrats reflector. “Many of […]

via the ARRL: Space Station Digital Amateur Radio TV System Transmitter Determined to be Defective

The Amateur Radio on the International Space Station (ARISS) “Ham Video” digital Amateur Radio TV (DATV) transmitter on the International Space Station (ISS) is reported to be defective, with onboard repair not possible. Also known as HamTV, the DATV system stopped working in mid-April, and a subsequent test on June 1 using a second L/S […]

via the ARRL: FCC Denies Petition Aimed at Preventing Interference from Digital Repeaters to Analog Repeaters

The FCC has turned away a Petition for Rulemaking from a Michigan radio amateur that asked the Commission to amend Section 97.205 of the Amateur Service rules to ensure that repeaters using digital communication protocols do not interfere with analog repeaters. Charles P. Adkins, K8CPA, of Lincoln Park, had specifically requested that discrete analog and digital repeaters […]

via the ARRL: FT8 Activity Bumping Up at Some Expense to Other Modes

Despite largely dismal HF conditions, there is no doubt that the recent FT8 digital protocol has made hams more enthusiastic about getting on the air. The mode has caught on so quickly that co-developer Joe Taylor expressed surprise last fall at the rapid uptake of FT8 for making contacts on HF bands. Judging by Logbook […]