![jt65 setup jt65 setup](https://www.essexham.co.uk/images/jt65-levels.jpg)
These modes offer enhanced message formats with support for nonstandard callsigns and some popular contests. MSK144 is designed for Meteor Scatter on the VHF bands. JT4 and QRA64 are optimized for EME on the VHF and higher bands, and especially the microwave bands from 2.3 to 24 GHz.įT4 and FT8 are operationally similar but use T/R cycles only 7.5 and 15 s long, respectively. With either JT9 or JT65, world-wide QSOs are possible with power levels of a few watts and compromise antennas. It is about 2 dB more sensitive than JT65 while using less than 10% of the bandwidth. JT9 is optimized for the LF, MF, and HF bands. JT65 and QRA64 were designed for EME ("moonbounce") on the VHF/UHF bands JT65 has also proved popular and effective for worldwide QRP communication at HF. They use timed 60-second T/R sequences synchronized with UTC. JT4, JT9, JT65, and QRA64 use nearly identical message structure and source encoding (the efficient compression of standard messages used for minimal QSOs). These modes were all designed for making reliable, confirmed QSOs under extreme weak-signal conditions. Keep your power reasonable and ALC under wraps and you’ll be a good JT op.WSJT-X implements amateur radio communication protocols or "modes" called FT4, FT8, JT4, JT9, JT65, QRA64, ISCAT, MSK144, and WSPR, as well as one called Echo for detecting and measuring your own radio signals reflected from the Moon. These signals are all levels of strength. I have seen more than 20 during busy band conditions. Roofing filter no tighter than 3khz.įollowing these steps I regularly decode 15-17 contacts per cycle. I normally run 3khz of IF bandwidth, Audio BW to allow 100-3k. And it does throw off the your frequency and you lose awareness of what else is going on elsewhere in the JT sub-band.
#JT65 SETUP SOFTWARE#
The software does such a good job of pulling out the signals it really just doesn’t help much. Some will tune to the frequency to then narrow the receiver IF bandwidth to improve performance. In fact, doing so will make the frequency calculations during logging and other functions incorrect. There is not need to move the VFO during operations. Set your VFO to the frequency WSJT-X sets when you use the WSJT-X band selection.
![jt65 setup jt65 setup](http://morsetutor.com/wp-content/uploads/2016/03/IMG_3962-1200x900.jpg)
You will get best transmitter performance. Set the power where you want it, then use the ALC normally. Your power output levels will wander all over the place with each tone and with transmitter heating. Many set power to max rig, normally 100 watts and drive to desired power levels with audio. Using newer rigs that use ALC to control output requires a different approach. Too much and you will splatter the entire JT sub-band and you’ll generate multiple decodes on the receive end. It can even decode two stations on almost exactly the same frequency. And that’s saying something, because it can decode what you can’t hear.
![jt65 setup jt65 setup](https://www.fichier-pdf.fr/2013/05/04/aide-jt65hf/preview-aide-jt65hf-1.jpg)
Adjust the video in the waterfall for best contrast. But I target a level of 30-35 with just air noise and 40 db during the receive cycle. It will decode better with 48khz over 44khz.
![jt65 setup jt65 setup](https://i.ytimg.com/vi/ujsFbZ9RLho/maxresdefault.jpg)
May not.Īudio card settings aren’t really all that critical. Under the “DECODE” menu try a less intensive decode level. If you have a computer that is also doing a lot of non-WSJT-X processing… you may not decode. If your computer is old and wimpy it may not decode RX. Once you see some decodes watch the decoded Time deltas and you can get a sense of where your time is and it’s sync quality.Īnother issue is computing power. If you are much more than 1 second off, you will probably not decode… RX or TX. You MUST be synced to an NTP time source at a minimum. It’s the very first reason for no decodes.