A two-way Olivia digital-mode radio conversation between station K8CJM and station NW7US on 12 November 2019 (UTC date). K8CJM is located in Dayton, Ohio, and NW7US is located in Lincoln, Nebraska. See http://OliviaDigitalMode.org for details about the digital mode, Olivia. NOTE: Compression and ALC!? Some have noted that it appears that I’ve left on the Compression of the transmitted audio. However, the truth is that compression was not being used (as is proof by carefully taking note of the zero meter movement of the Compression activity). I had the radio set for 20-Meter USB operation on the Sub VFO. Compression was set for standard USB operation. Note also that the radio was transmitting USB-D1, which means the first data/soundcard input to the radio. Also, some complain about my use of ALC, because, in their view, ALC (automatic level control) is a no-no for data modes. The notion that one must NEVER use ALC when transmitting digital modes is not accurate. Multi-frequency shift keyed (MFSK) modes with low symbol rate–such as the Olivia digital modes–use a single carrier of constant amplitude, which is stepped (between 4, 8, 16 or 32 tone frequencies respectively) in a constant phase manner. As a result, no unwanted sidebands are generated, and no special amplifier (including a transmitter’s final stage) linearity requirements are necessary. Whether the use of ALC matters or not depends on the transmitted digital mode. For example, FSK (Frequency-Shift Keying; i.e., RTTY) is a constant-amplitude mode (frequency shift only). In such a case, the use of ALC will NOT distort the signal waveform. PSK31 does contain amplitude shifts, as an example, therefore you don’t want any ALC action that could result in distortion of the amplitude changes in the waveform. On the other hand, the WSJT manual says that its output is a constant-amplitude signal, meaning that good linearity is not necessary. In that case, the use of ALC will NOT distort the transmitted signal-amplitude waveform. You can use ALC or not, as you choose when you run WSJT modes, or Olivia (MFSK). Clarification Nowhere in this am I advocating running your audio really high, thinking that the ALC will take care of it. I am not saying that. I am saying that some ALC is not going to be an issue. You MUST not overdrive any part of the audio chain going into the transmitter! Transmit audio out of the sound card remains at a constant amplitude, so there will be no significant change in power output if you adjust your input into the radio so that the ALC just stops moving the meter, or, you can have some ALC meter movement. You can adjust your audio to the transmitter either way. If the transmitter filters have a significant degree of ripple in the passband then you may fin ... https://www.youtube.com/watch?v=ur7-wHdLxBw

Demonstration of a two-way transmission using the Olivia digital mode on shortwave. I am in QSO (conversation) with KA5TPJ. There are two other Olivia QSOs just below our frequency. Just above us is a lot of FT8 activity. Below the two other Olivia QSOs are PSK31 QSOs. The band is active. And, Olivia is not dead. -=-=-=-=- 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: https://YouTube.com/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 + "CQ Amateur Radio Magazine", http://www.cq-amateur-radio.com/ + "The Spectrum Monitor" http://www.thespectrummonitor.com/ -- Twitter: https://Twitter.com/NW7US (@NW7US) -- Tumblr: http://blog.nw7us.us -- Google+ http://nw7us.us/+ -- Instagram: https://instagram.com/nw7us Linux User #32405 - Since 1996 Copyright, Tomas Hood / NW7US ... https://www.youtube.com/watch?v=yAIhkaJN15o

With the return of the robins, we see the promise of a new spring, new life, Spring! ... https://www.youtube.com/watch?v=5LIHEqEcUwE

How to set the Reed-Solomon Identification feature in Ham Radio Deluxe Digital Master 780 software. Reed-Solomon Identification is also known as RSID. Please join our Olivia-mode email group: https://groups.io/g/Olivia Also, be aware that we have a Facebook group dedicated to instant communication for spotting, scheduling, and so on, at https://www.facebook.com/groups/olivia.hf/ -- please join this group, if you are on Facebook. Voluntary channelization Since Olivia signals can be decoded even when received signals are extremely weak, (signal to noise ratio of -14db), signals strong enough to be decoded are sometimes below the noise floor and therefore impossible to search for manually. As a result amateur radio operators have voluntarily decided upon channelization for this mode. This channelization allows even imperceptibly weak signals to be properly tuned for reception and decoding. By common convention amateur stations initiate contacts utilizing 8/250, 16/500, or 32/1000 configuration of the OLIVIA mode and then switch to other configurations to continue the conversation. Note: some websites publish frequencies that are right on top of weak-signal FT8, JT65 and JT9 segments. Even if that is a matter of contention, follow the regulations and be kind: DO NOT QRM weak-signal QSOs! AGAIN: make sure that your signal does not cross into other sub-bands where weak-signal modes are active. For instance, do not have any part of your signal at x.074 or higher, as this is the sub-band for FT8, JT65A, and JT9. Quick Reference: we suggest 8/250 as the starting settings when calling CQ on the USB dial frequency of 14.072 MHz with an offset of 700 Hz, on 20m, and on 40m, 7.072 dial with an offset of 700 Hz (and again 8/250). Do not switch to other modes without calling CQ for at least a five-minute window. It is really horrid when people call CQ and change settings, modes, bandwiths, tones, every time they call CQ! DO NOT QRM WEAK-SIGNAL MODES such as WSPR, JT65A, and JT9! BE AWARE OF THE BAND PLANS FOR THOSE MODES!! Operating OLIVIA 1. Please make sure you are using the RSID (Reed Solomon Identification - RSID or TXID, RXID) option in your software. RSID transmits a short burst at the start of your transmission which identifies the mode you are using. When it does that, those amateur radio operators also using RSID while listening will be alerted by their software that you are transmitting in the specific mode (Olivia, hopefully), the settings (like 8/250), and where on the waterfall your transmission is located. This might be a popup window and/or text on the receive text panel. When the operator clicks on that, the software moves the waterfall cursor right on top of the signal and changes the mode in the software. This will help you m ... https://www.youtube.com/watch?v=lBIacwD9nNM