The June club meeting will be held online via WebEx (https://bit.ly/2Tv4bXh). If you have any questions about joining the meeting, please email firstname.lastname@example.org.
Multiple Frequency-Shift Keying and Mysterious Olivia — Trans-Polar Fun and More
If you have taken the leap into using your shortwave transceiver as a digital mode communication tool, perhaps with the highly popular FT8 mode, or with another mode that uses a computer rather than with your voice or by using a Morse code key, then you understand the effectiveness of digital communication. If you have only heard the glowing reports from others who have tried digital modes, then you are a candidate for a new journey that can be rewarding in many ways.
Olivia MFSK is an amateur radioteletype protocol that uses multiple frequency-shift keying (MFSK) and is designed to work in difficult (low signal-to-noise ratio plus multipath propagation) conditions on shortwave bands. The signal can be received accurately even if the surrounding noise is 10 dB stronger. It is commonly used by Amateur Radio operators to reliably transmit ASCII characters over noisy channels using the high-frequency (3 MHz to 30 MHz) spectrum. The effective data rate of the Olivia MFSK protocol varies but is typically around 150 characters per minute.
Frequency-shift keying (FSK) is a modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier signal. The technology is used for communication systems such as telemetry, weather balloon radiosondes, caller ID, garage door openers, and low-frequency radio transmission in the VLF and ELF bands. The simplest FSK is binary FSK (BFSK). BFSK uses a pair of discrete frequencies to transmit binary information, “0s” and “1s.” With this scheme, the “1” is called the mark frequency and the “0” is called the space frequency. RTTY is an example of a BFSK radio signal modulation scheme.
Come meet Olivia and the digital chat mode that makes FT8 obsolete for social radio enthusiasts.
— Tomas Hood, NW7US
The Lincoln SATERN Amateur Radio Club will celebrate the 82nd anniversary of Donut Day with a special event station on 20 meters.
Day: Friday, June 5
Time: 9 am to 5 pm CDT (1400 to 2200 Zulu)
Frequency: 14.318 MHz
Certificate & QSL: Contact Chuck (KDØPTK) at KDØPTK@gmail.com
Details in June QST: http://www.arrl.org/news/the-june-issue-of-digital-qst-is-now-available-3
Many people celebrate National Donut Day on the first Friday in June. It was started by the Salvation Army in 1938 to help those in need during the great depression and commiserate the work of the “Donut Lassies,” who served donuts to soldiers in World War I. Donut Day is the symbol of the comfort that the Salvation Army provides to those in need through its many social programs.
The LARC Board will be meeting via WebEx. The meeting is still open to club members. If you wish to join the meeting, contact Justin, WJØTX, at email@example.com and he will send you the necessary details.
The May club meeting will be held online via WebEx (https://bit.ly/2KEY65D). If you have any questions about joining the meeting, please email firstname.lastname@example.org.
The Amateur Radio Emergency Service® (ARES) consists of licensed Amateur Radio operators who voluntarily registered their qualifications and equipment with local ARES leadership for public service communications duty when disaster strikes. The ARRL set in motion a new ARES strategic plan to improve collaboration with government and human services agencies and streamline community disaster response.
The LARC May club meeting presentation, “Intro to ARES,” will give a history of ARES and outline what you can do as a volunteer. We’ll also give the “nuts and bolts” of the organization. James Nelson, WØJRN, Southeast Nebraska District Emergency Coordinator (SE NE DEC), and Ed Holloway, KØRPT, Nebraska Section Emergency Coordinator (NE SEC), will tag-team this presentation. Please plan to attend this online presentation on Wednesday, May 13, at 7:30 pm via www.neares.net/larcmeeting.
The May 7 VE session will be held at Holme Lake Park starting at 6:30 pm at the northwest picnic pavilion. Enter Holmes Lake park using the entrance off Normal Blvd and park in the parking lot between the covered picnic area and children’s play area.
Plans are in place to ensure social distancing and sanitation of writing materials.
— Chris, KC0PJR
Volunteer Exam Session Coordinator