K3 FSK RTTY Problems
Locked
 
|
Hi All,
This weekend my K3 stopped working with FSK. AFSK works just fine. I have ran many RTTY contests with the K3 in FSK mode, using various software drivers. The problem is I get a single tone, but at the wrong frequency, Its about 200hz, not 2125Hz. I checked the pitch setting, its still setup for High tones, the radio keys just fine, I have not checked the fsk input signal, but even if that was bad and not toggling I should still have an output at the Mark frequency, not way low at ~200hz. I reloaded firmware, - no change. The K3 is a mid 5000 serial number and has worked flawless for many years of RTTY contests. This one has me baffled, any suggestions? (I switched to AFSK setup for now). Gordon - N1MGO ("Bambi" on RTTY) ______________________________________________________________ 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 Message delivered to [hidden email] |
|
|
Ralph,
I normally use MMTTY, with DXLabs. That is not the problem, the Mark output of the radio is at ~200hz, NOT 2Khz as normal, and can not tell if the space is there or not, due to the super low frequency offset from the dial frequency. I'm setup for SO2V operation with Writelog, that also has the problem. I did check for port conflicts and did not find any. Thanks for the suggestions! Gordon - N1MGO On 11/09/2015 08:47 AM, Ralph McClintock wrote: > Gordon, > How are you generating FSK and are you using MMTTY? It sounds like > you are getting PTT but not FSK out of the serial port. There may have > been a conflict pop up in your PC for that serial port. I have had the > exact problem using MMTTY through MH Digi Keyer & Digi Keyer II. > Ralph W1ZK > -- Gordon - N1MGO ______________________________________________________________ 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 Message delivered to [hidden email] |
|
|
In reply to this post by Gordon LaPoint
Gordon,
It's not clear what you mean. The mark output from the radio is at RF, not at either 2 kHz or 200 Hz. Do you mean the audio monitor tone you hear from the K3, or are you monitoring in some other way? In FSK D (and also in AFSK A), the K3's dial displays the actual Mark frequency as transmitted. If you are monitoring via an external receiver, the two RTTY frequencies should be at the K3's dial frequency (mark) and at a frequency 170 Hz lower (space). The audio monitor tone from the K3 should be at the K3's Pitch setting. If it isn't, that would seem to point to something odd in the monitor, which does not necessarily mean there is anything wrong with the actual transmitted RF. 73, Rich VE3KI N1MGO wrote: > I normally use MMTTY, with DXLabs. That is not the problem, the > Mark output of the radio is at ~200hz, NOT 2Khz as normal, and can not > tell if the space is there or not, due to the super low frequency offset > from the dial frequency. I'm setup for SO2V operation with Writelog, > that also has the problem. I did check for port conflicts and did not > find any. ______________________________________________________________ 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 Message delivered to [hidden email] |
|
|
Rich,
Sorry, I am going by the monitor tone. I need to check the actual rf on another radio and see if the Mark is really at 200hz offset or at 2.1Khz like it should be ( I use high tones from mmtty or 2tone) the AFSK A is working normal. I did not hear any shift using FSK D. I normally use FSK D, and the "pitch" setting was still correct, is there another setting that affects the pitch? Gordon - N1MGO On 11/09/2015 11:29 AM, Richard Ferch wrote: > Gordon, > > It's not clear what you mean. The mark output from the radio is at RF, > not at either 2 kHz or 200 Hz. Do you mean the audio monitor tone you > hear from the K3, or are you monitoring in some other way? > > In FSK D (and also in AFSK A), the K3's dial displays the actual Mark > frequency as transmitted. If you are monitoring via an external > receiver, the two RTTY frequencies should be at the K3's dial > frequency (mark) and at a frequency 170 Hz lower (space). > > The audio monitor tone from the K3 should be at the K3's Pitch > setting. If it isn't, that would seem to point to something odd in the > monitor, which does not necessarily mean there is anything wrong with > the actual transmitted RF. > > 73, > Rich VE3KI > > N1MGO wrote: > >> I normally use MMTTY, with DXLabs. That is not the problem, the >> Mark output of the radio is at ~200hz, NOT 2Khz as normal, and can not >> tell if the space is there or not, due to the super low frequency offset >> from the dial frequency. I'm setup for SO2V operation with Writelog, >> that also has the problem. I did check for port conflicts and did not >> find any. > ______________________________________________________________ > 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 > Message delivered to [hidden email] -- Gordon - N1MGO ______________________________________________________________ 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 Message delivered to [hidden email] |
|
|
In reply to this post by Gordon LaPoint
If you are using MMTTY make sure that you have the "EXTFSK" patch set up
in both the TX setup window and the Misc window. I get tripped up on this every once in a while. If these settings are correct you probably have a physical problem with the FSK keying lead between the interface and the K3. You can check the radio by grounding pin 1 of the ACC (DB15) connector. The tone will shift when grounded. Good luck Ed ______________________________________________________________ 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 Message delivered to [hidden email] |
|
|
In reply to this post by Gordon LaPoint
Rich, and others on the list,
Thanks for all of the suggestions. I got the system working. The problem was the pitch setting. While in FSK D If you hold the Pitch button the K3 shows the current pitch, (2125-170) is what was showing. I changed it to low tones (915-170) and back to 2125. That fixed it! I now have working FSK-D mode again. I'm not sure what was going on, but the pitch was at some value of ~200hz, not 2125. Resetting the pitch fixed it. So for future reference, don't believe the display, change it and then set it back to what you want!! I was hearing a tone of about 200 hz when going into tx, but was hearing the 2125 when I pressed the Pitch button. Now I hear a tone of 2125 and diddles when I use the software to send something. Thanks to all for the suggestions, Gordon - N1MGO On 11/9/2015 3:28 PM, Richard Ferch wrote: > Just a thought - is there any chance your K3 is not in FSK D, but in > some other Data sub-mode? > > When I put my K3 into FSK D and press the XMIT button, I hear a > sidetone in my headphones that is identical to the tone I hear when I > press the PITCH button. (That's assuming I don't have the K3's MON > level set to zero.) The pitch of the sidetone is affected by the PITCH > setting, but nothing else I adjust, including filter settings and > XIT/RIT, seems to have any effect on it. > > In PSK D, the sidetone is a PSK idle signal at 1000 Hz. In AFSK A and > DATA A, there is no sidetone unless there is audio getting into the > radio (e.g. from the Line In connector). > > It has been years since I used FSK. I switched to AFSK soon after I > got my K3, as soon as I realized that the K3's transmitted signal was > cleaner in AFSK than in FSK. However, back when I did use FSK, when > there was a keying input connected to the ACC connector sending > diddles to the radio I heard diddles in the monitor, the same as I > would in AFSK where the input to the radio actually is a diddling > audio tone. > > If you are hearing a 200 Hz tone (lower pitched than even the lowest > possible CW sidetone) with the radio transmitting in FSK D, there is > something very peculiar going on; that's not the way it is supposed to > work. > > If you are hearing a steady tone in the monitor at the Pitch frequency > with no diddling, then either the software is not generating a keying > output (MMTTY set up for AFSK instead of FSK, for example), or the > connection to the ACC connector is broken. > > You can use the K3 Utility to check some of this. Start the Utility > up, choose the Terminal tab, select RTTY, put the K3 into FSK D, type > something into the lower pane near the bottom of the window, press > Ctrl+T or click on the Transmit button, and you should hear something > that is mostly at 2295 Hz (the space tone), with diddles and text > characters causing it to diddle back to 2125 Hz (the Pitch setting). > If that works, then the problem is likely somewhere outside the area > that the Utility tests. > > You can test for a problem in the K3's internal wiring to the ACC > connector by shorting pin 1 to pin 5 on the ACC connector to see if > that causes the sidetone to shift frequency. If that works properly > but you are not getting the same frequency shift when you try to use > your RTTY software, then the problem is upstream - in your cable or in > the configuration of the software you are using for FSK. > > 73, > Rich VE3KI > > > On 2015-11-09 12:05 PM, Gordon LaPoint wrote: >> Rich, >> Sorry, I am going by the monitor tone. I need to check the actual >> rf on another radio and see if the Mark is really at 200hz offset or at >> 2.1Khz like it should be ( I use high tones from mmtty or 2tone) >> the AFSK A is working normal. I did not hear any shift using FSK D. >> I normally use FSK D, and the "pitch" setting was still correct, is >> there another setting that affects the pitch? >> >> >> Gordon - N1MGO >> >> On 11/09/2015 11:29 AM, Richard Ferch wrote: >>> Gordon, >>> >>> It's not clear what you mean. The mark output from the radio is at RF, >>> not at either 2 kHz or 200 Hz. Do you mean the audio monitor tone you >>> hear from the K3, or are you monitoring in some other way? >>> >>> In FSK D (and also in AFSK A), the K3's dial displays the actual Mark >>> frequency as transmitted. If you are monitoring via an external >>> receiver, the two RTTY frequencies should be at the K3's dial >>> frequency (mark) and at a frequency 170 Hz lower (space). >>> >>> The audio monitor tone from the K3 should be at the K3's Pitch >>> setting. If it isn't, that would seem to point to something odd in the >>> monitor, which does not necessarily mean there is anything wrong with >>> the actual transmitted RF. >>> >>> 73, >>> Rich VE3KI >>> >>> N1MGO wrote: >>> >>>> I normally use MMTTY, with DXLabs. That is not the problem, the >>>> Mark output of the radio is at ~200hz, NOT 2Khz as normal, and can not >>>> tell if the space is there or not, due to the super low frequency >>>> offset >>>> from the dial frequency. I'm setup for SO2V operation with Writelog, >>>> that also has the problem. I did check for port conflicts and did not >>>> find any. >>> ______________________________________________________________ >>> 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 >>> Message delivered to [hidden email] >> >> ______________________________________________________________ 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 Message delivered to [hidden email] |
«
Return to Elecraft
|
1 view|%1 views
| Free forum by Nabble | Edit this page |