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Olivia Demo With FLDigi (rough take)

NW7US
6.38K subscribers
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9.3K views 7 years ago #32405
This is a demonstration of using FLDigi software to work with the Olivia digital communications keyboard-to-keyboard mode used in the amateur radio service (by ham radio operators), primarily on shortwave frequencies. See more details regarding Olivia: http://OliviaDigitalMode.org Olivia MFSK is an amateur radioteletype protocol designed to work in difficult (low signal-to-noise ratio plus multipath propagation conditions on shortwave bands. The signal can still be properly copied when it is buried 10 dB below the noise floor (i.e. when the amplitude of the noise is just over 3 times that of the signal). It is commonly used by amateur radio operators to reliably transmit ASCII characters over noisy channels using the high frequency (3-30 MHz, HF) spectrum. Olivia modes are commonly referred to as Olivia X / Y (or, alternatively, Olivia Y / X ), where X refers to the number of different audio tones transmitted and Y refers to the bandwidth in  …...more
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Olivia Demo With FLDigi (rough take)
N/ALikes
9,350Views
2018Jan 3
This is a demonstration of using FLDigi software to work with the Olivia digital communications keyboard-to-keyboard mode used in the amateur radio service (by ham radio operators), primarily on shortwave frequencies. See more details regarding Olivia: http://OliviaDigitalMode.org Olivia MFSK is an amateur radioteletype protocol designed to work in difficult (low signal-to-noise ratio plus multipath propagation conditions on shortwave bands. The signal can still be properly copied when it is buried 10 dB below the noise floor (i.e. when the amplitude of the noise is just over 3 times that of the signal). It is commonly used by amateur radio operators to reliably transmit ASCII characters over noisy channels using the high frequency (3-30 MHz, HF) spectrum. Olivia modes are commonly referred to as Olivia X / Y (or, alternatively, Olivia Y / X ), where X refers to the number of different audio tones transmitted and Y refers to the bandwidth in hertz over which these signals are spread. Examples of common Olivia modes are 16/500, 32/1000 and 8/250. Olivia (Center) Frequencies (kHz) It is often best to get on standard calling frequencies with this mode because you can miss a lot of weak signals if you don't. However, with Olivia activity on the rise AND all the other modes vying for space, a good deal of the time you can operate wherever you can find a clear spot--as close as you can to a standard calling frequency. Note: some websites publish frequencies in this band, frequencies that are right on top of weak-signal JT65 and JT9 segments. DO NOT QRM weak-signal QSOs! We (active Olivia community members) suggest 8/250 as the starting settings when calling CQ on the USB frequencies designated as "Calling Frequencies." A Calling Frequency is a center frequency on which you initially call, "CQ..." and then, with the agreement with the answering operator, move to a new nearby frequency, changing the number of tones and bandwidth at your discretion. Even though 8/250 is slow, the CQ call is short. But, it is narrow, to allow room for other QSOs nearby. CENTER FREQUENCIES: 1.8269, 3.5729, 7.0729, 10.1429, 14.0729, 18.1029, 21.0729, 24.9229, 28.1229, and so on. See the pattern? (Why the ...9 frequency? Experts say that ending in a non-zero, odd number is easier to remember!) For those new to waterfalls: the CENTER frequency is the CENTER of the cursor shown by common software. The cursor is what you use to set your transceiver's transmit/receive frequency on the waterfall. If your waterfall shows the frequency, then you simply place the cursor so that its center is right on the center frequency listed, above. If your software is set to show OFFSET, then you might, for example, set your radio's dial frequency to 14.0714, and place the center of your waterfall cursor to 1500 (1500 Hz). That would translate to the 14.0729 CENTER frequency. Join our Facebook.com group for Olivia:   / olivia.hf   Join us on Groups.Io: https://groups.io/g/olivia Thank you for watching, commenting, and most of all, for subscribing. By subscribing, you will be kept in the loop for new videos and more... my YouTube Channel:    / nw7us   -- Tomas, Amateur radio guy and space weather guru; NW7US -- Home page: http://NW7US.us/ and http://SunSpotWatch.com -- Contributing editor, propagation and space weather columns in -- Twitter:   / nw7us   (@NW7US) -- Tumblr: http://blog.nw7us.us -- Google+ http://nw7us.us/+ -- Instagram:   / nw7us   Linux User #32405 - Since 1996 73 - NW7US Copyright, 2018, by Tomas Hood (NW7US). All rights reserved.

NW7US

6.38K subscribers