JT65HF -- Data Mode A
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I recently downloaded JT656HF by W6CQZ and have on several occasions monitored 14.076 MHZ with my K3/Signalink USB using this software. I am still in the process of trying to set up the software and gaining an understanding of how to use it. I experience the following: 1) If I set my K3 in data mode A, no decoding of JT65 signals occurs during the 12 second decoding period, but 2) if I set my K3 in the USB mode, decoding of the JT65 signals does occur in the 12 second decoding period. I have not tried any transmissions. I would appreciate any advice/solutions so that I can use data mode A with JT65HF.
I use the K3, Signalink USB and FLDIGI on a regular basis for PSK31 with data mode A and have not had any problems. N9KW John ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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John,
What are your filter settings? The default filter settings in DATA A are Fc = 1500 Hz, width = 500 Hz. The JT65 "sub-band" is 2 kHz wide, centered at 1270 Hz, so with the default DATA A filter setting you will only be able to copy a small fraction of the sub-band and therefore only a small fraction of the signals that are on at any time. Your K3's filter width should be set to 2.5 kHz or so to cover the whole JT65 sub-band. 73, Rich VE3KI N9KW wrote: > I recently downloaded JT656HF by W6CQZ and have on several occasions monitored 14.076 \ > MHZ with my K3/Signalink USB using this software. I am still in the process of \ > trying to set up the software and gaining an understanding of how to use it. I \ > experience the following: 1) If I set my K3 in data mode A, no decoding of JT65 \ > signals occurs during the 12 second decoding period, but 2) if I set my K3 in the USB \ > mode, decoding of the JT65 signals does occur in the 12 second decoding period. I \ > have not tried any transmissions. I would appreciate any advice/solutions so that I \ > can use data mode A with JT65HF. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by John Bohnert
Hello John, First of all I would highly recommend you try asking JT65-hf related questions on the jt65-hf@googlegroups.com list. Their list is totally dedicated to helping folks with the JT65-hf software. You can join it here: https://groups.google.com/forum/?hl=en&fromgroups#!forum/jt65-hf That said, I run my K3 with a SignaLink USB and JT65-hf on Windows 7 I also bought the SignaLink cable for the K3, so I can use the rear jacks. I'll address your "12 second" comment first, then give you a few pointers after that. I'm assuming when you say "12 second" you are referring to the, 48-60 second, section of a minute. There should be 'NO' signals during that time. If there are, your computers time sync with NTP is wrong. Anything above 2-3 seconds off 'nothing' decodes 'any' time during the entire 60 seconds. The only time you should see any signals in the waterfall is between 0-48 seconds, then there is a 12 second quiet time. (good opportunity for setting the volume levels in JT65-hf so they read 0 in receive) (top left in the JT65-hf window, where it says Audio Input Levels) Time syncing you computer is 90% of the problem with bad/no decodes To much receive signal strength is the other 10% (above 4 or 5 it goes into the red to show rx is to hot) Meinberg is good for setting your clock http://www.meinberg.de/english/sw/ note: the internal Windows time sync is NOT accurate enough for this task! === Settings for JT65-hf operations with the K3 and SignaLink USB. K3 in DATA mode A, (which for the K3 defaults to USB) Data A also sets the K3 so there is no compression during transmit. If you use straight USB mode there may/will be distortion on your signals. While in DATA A, set the MIC knob (lineout level) to Line 10-20 if this needs to be any higher, you can jumper JP3 in the SignaLink. "JP3 – This jumper can be installed to increase the SignaLink USB’s Transmit Audio Signal." In Receive, under MAIN CONFIG menu, the LIN OUT is set to [nor 010] If the volume is to low you may need to jumper JP2 in the SignaLink. "JP2 – This jumper can be installed to increase the Receive Audio signal going into the SignaLink USB’s built-in sound card." the above settings interact with TX & RX controls on the SignaLink Set the K3 as above, then use the TX & RX knobs to tweak the levels needed for JT65-hf to work. For TX I set the K3's PWR where I want (say 5w) MIC knob (lineout level) is set to Line 10-20 then turn the SignaLink TX up til I get the K3's ALC to the 5th bar For RX I set the K3 MAIN CONFIG menu the LIN OUT is set to [nor 010] then the turn the RX on the SignaLink USB up so the reading for the JT65-hf 'Audio Input Levels' shows L 0 This is set with no signals being received, like during the time between 48-60 seconds. In JT65-hf rig control, I use DXLabs Commander. I set the width of the K3's filter to 2.0khz and if you have a P3 set it's span to 3khz In Windows 7 under the 'recording devices' for the SignaLink USB properties are set to: Listen to this device NOT checked Power Management set to 'Continue running under battery power' Microphone level '37' 1 channel, 16 bit, 44100 HZ (CD Quality) Exclusive Mode 'both' boxes are checked ** side note, I was just trying RMS Express for WinMor and after 3 days figured out the SignaLink USB's DLY MUST be set down to off. So it could possibly be the cause of some problems, on some other modes ** I have found you can use much less power in TX than you might think. I have only short verticals (7-9' tall) on 10-20m I may have to run as high as 20w to get to Russia or S. Africa from Texas. But otherwise I make most contacts with 1-5w. Using a 7' tall vertical on 160m and 20w (1.2w ERP) I made a QSO with California receiving a -14 report. GENERAL Be sure to check out the following url's: for 'band of the day' info: http://www.powerlinenoise.com/n0rq/JT65-HF/ for a look at signal reports worldwide: http://jt65.w6cqz.org/receptions.php when you get to transmitting be sure to look at the: "Want to see only your reports? Click here for a filtered listing" link http://jt65.w6cqz.org/freceptions.html this site will tell you how much power you are using and how low uou can go: http://dwestbrook.net/projects/ham/dBCalc/?my_power=5&my_report=-01 shows Spotted stations, you can use settings to show many things LOTW and eQSL stations, Bands, different modes, etc http://hamspots.net/wsjt/ and of course the pskreporter.info site > http://pskreporter.info/pskmap.html?preset&callsign=ZZZZZ&what=all&mode=JT65&timerange=86400 also check out Ham-Apps JT-Utilities Useful helper applications for JT65-HF http://www.ham-apps.com/ === Hope I didn't bore you and others to tears John, good luck with your JT65 efforts, hope to see you in the waterfall soon. 73 & GB K5OAI Sam p.s. we now turn the list back over to other Elecraft chatter <g> |
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a couple of more thoughts I missed about running the K3 with a SignaLink USB on JT65
I forgot to cover the sliders underneath 'Audio Input Levels' bars" in the upper left of the JT65-hf screen they are also useful for acquire the '0' setting desired when there are no signals present (in the 48-60 sec time period) I try to leave those slider(s) set to center then set all the other receive stuff up like I said in the previous email (partly quoted below) then I can use those sliders if there is some immediate need to either raise or lower the volume lever to keep it in the black if you go below or above the 'desired' readings *during decoding* those numbers will turn red to warn you actually since you're really operating in single channel mode, only the top one matters it's kinda backwards to me but in the Win 7 Recording Devices the Microphone USB CODEC Properties is actually the one that effects your receive level (37) and in the Win 7 Speakers USB Audio CODEC is the one that effects the TX level I use that is set to (50) I also forgot to mention if you are all set up and working fine in receive and someone comes on that is so loud (strong) that they put you in the red and mess up any and all decodes for that 48sec period then you can HOLD in the notch to get the K3's adjustable notch and while watching the waterfall in JT65-hf move the notch to where it is masking most of the loud signal it won't cover the whole signal but if you set it to mask the left hand sync line in the water fall it will cover most of the offending signal I'm sure you can also move and narrow the bandwidth, to just allow the signal you are wanting but that takes more time and you only have a few seconds to do something I was trying to copy my signal report from S. Africa when this happened to me and I needed a quick fix and the K3's adjustable notch was just the trick 73 & GB K5OAI Sam
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