on reception is always on in MMTTY and either my keyer or my transceiver is set to inverse the FSK transmission stream. Hence, I operate this transceiver always in its RTTY-USB mode.
Rtty machine how to#
This is cumbersome for logging QSOs on LoTW which does not know how to handle RTTYR as a mode. My Yaesu FT-990 insists on designating RTTY-LSB as reversed or RTTYR in its CAT communication with my computer. On the FT‑990, this is set using DIP switches.Ĭaveat: Reversed FSK on RX implies inversing FSK on TX!
Rtty machine serial#
(See below.) It is a good idea to also configure RTS-PTT for the other virtual serial ports for use with other programs. Instead of using the dedicated PTT1 port, MMTTY will need to key PTT with a RTS (ready to send) signal on the FSK1 port. Here is why: MMTTY is only able to employ a single COM port for both PTT T/R and FSK tone keying. Also make sure to tick off RTS-PTT for each of these virtual serial ports. In this step, the CAT, PTT and FSK channels of the microHAM keyer will be assigned to a Linux device virtual serial port. Keep your transceiver and cabling at hand too, because -remember- the keyer gets its power from the transceiver.
Rtty machine install#
Just install the Windows™ microHAM USB Device Router and let this program upgrade your keyer to the latest version of the appropriate firmware. In less than 10 minutes, you get the job done. Installing new keyer firmware is the one and only instance where you are probably quicker off borrowing a Windows™ computer. Hence firmware MUST be upgraded and power-up settings MUST be again stored to EEPROM of keyer.» «Some changes in keyer protocol and settings format was introduced to be compatible with router v5.1.0. Hidden deep within its change file mmk_change_log.txt, the Novementry reads: The firmware for the micro/Digi/CW keyers (MK/CK/DK) goes under the name of mmk. Once mhuxd is installed, first, make absolutely sure your microHAM keyer is running the latest firmware! Failing to do so, guarantees problems with MMTTY PTT keying over the FSK port -as I experienced first-hand. Summary screen of the mhuxd daemon available at showing the keyer’s firmware version.
However, as with all hardware under GNU/Linux, always check for Linux support on the web before acquiring a new interface! Because they are quite popular and I had one lying around, this article will focus on the excellent microHAM interface products.
Many transceiver interfaces work with GNU/Linux. If you own a modern transceiver with a USB port which presents audio as a sound device, you may skip this part. The use of virtual PlayOnLinux drives keeps things uncluttered and limits the damage when any Windows™ program goes awry. PlayOnLinux offers the benefit of installing unrelated Windows™ programs on separate virtual drives, also called «bottles» in CrossOver, a commercial offering similar to the free (as in beer) PlayOnLinux. I prefer the use of PlayOnLinux - a front-end for Wine - over using bare metal Wine. Previously, I have been using Win-Test on Xubuntu LTS. However, getting set for RTTY contesting under GNU/Linux is kind of challenging. The required signal-to-noise ratio lies between a moderately low -5 to -9 dB in any case, much lower than the +10 dB for SSB! These characteristics render late-night RTTY contesting especially gentle towards family members and nearby neighbours. What is more, you even do not need to listen to RTTY stations in order to work them. There is no need to type a lot, nor do you need to shout your voice hoarse. Drop me a line when you managed to get QARTest running in a stable fashion on GNU/Linux.
Rtty machine update#
I will update this page as I make progress. Hence, the information contained on this page should be considered as experimental. However, I have not yet managed to run it fully stable as I did with Win-Test. Running QARTest with PlayOnLinux on GNU/Linux looks promising. QARTest, even though written in Italian, is interesting because it supports many European RTTY contests and the software is kept maintained. (RTTY) Contesting on GNU/Linux with QARTest Serge Stroobandt, ON4AA Copyright 2017–2021, licensed under Creative Commons BY-NC-SA
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