Topics

RTTY FSK ... again!


Rick Boswell
 

Relative newbie here to DXL/WW/7610/RTTY. Have been using this combo for about 18 months and slowly developing modest competence with a small subset of overall capabilities. Have had digital modes (WSJT-X/JTAlert/PSK31/RTTY) working well with AFSK for some time using USB cable only.  Now trying to get RTTY FSK working. Basic question:  The official DXL documentation seems to indicate that a cable with a USB to serial converter is needed to use FSK. Other posters have implied (without providing details) that all can be done with just a USB cable. I have spent quite a bit of time reviewing posts here and on the 7610 forum and haven’t yet found a comprehensive guide to cabling and configuration info for this set up. Two basic questions before spending more time on this:

1.       Can this be done (single USB cable, no USB to serial converter)?

2.       If so, is there a source of detailed, comprehensive info on setup of this configuration which covers setup options for 7610/WW/MMTTY/EXTFSK and any other setup requirements? Link appreciated.

Thanks,

Rick

K8EZB


Carl - WC4H
 

Hi RIck.

If your radio has a USB port like the IC-7300 and many others. You can just use a USB cable.  You also have to install the drivers for the sound card.

If you want to use FSK,  then you may need a second connection for CAT or you need to split the port with one of the softwares available.

I have an IC-7300 with the USB cable connected as well as a CI-V adapter in the remote port.  Honestly, I find it much easier to use AFSK and use only the USB port.  Works well and is much less complicated.

If you want to try the dual config then on WinWarbler Config in the RTTY Tab: Set the FSK value to RTTY and the radio button next to it to LSB.  When you check the radio button, it will unselect the AFSK. 

Then you can set commander for whatever port you have for CAT control.

Some radios assign two com ports to their internal cards.  I'm not sure but in those cases, you can see which one works for CAT control and try the other for RTTY.

73.
Carl - WC4H

 


g4wjs
 

On 20/06/2020 17:35, Rick Boswell wrote:

Relative newbie here to DXL/WW/7610/RTTY. Have been using this combo for about 18 months and slowly developing modest competence with a small subset of overall capabilities. Have had digital modes (WSJT-X/JTAlert/PSK31/RTTY) working well with AFSK for some time using USB cable only.  Now trying to get RTTY FSK working. Basic question:  The official DXL documentation seems to indicate that a cable with a USB to serial converter is needed to use FSK. Other posters have implied (without providing details) that all can be done with just a USB cable. I have spent quite a bit of time reviewing posts here and on the 7610 forum and haven’t yet found a comprehensive guide to cabling and configuration info for this set up. Two basic questions before spending more time on this:

1.       Can this be done (single USB cable, no USB to serial converter)?

2.       If so, is there a source of detailed, comprehensive info on setup of this configuration which covers setup options for 7610/WW/MMTTY/EXTFSK and any other setup requirements? Link appreciated.

Thanks,

Rick

K8EZB

Hi Rick,

I don't have an IC-7610, but looking at the advanced manual I see you can assign the FSK keying input to any of RTS or DTR on either virtual COM port that you get when you connect with a USB cable with the required drivers. So that means any RTTY application that can key either of RTS or DTR can send FSK RTTY on the IC-7610, which probably means they all can.


--
73

Bill

G4WJS.


Dave AA6YQ
 

+ AA6YQ comments below

Relative newbie here to DXL/WW/7610/RTTY. Have been using this combo for about 18 months and slowly developing modest competence with a small subset of overall capabilities. Have had digital modes (WSJT-X/JTAlert/PSK31/RTTY) working well with AFSK for some time using USB cable only. Now trying to get RTTY FSK working. Basic question: The official DXL documentation seems to indicate that a cable with a USB to serial converter is needed to use FSK. Other posters have implied (without providing details) that all can be done with just a USB cable. I have spent quite a bit of time reviewing posts here and on the 7610 forum and haven’t yet found a comprehensive guide to cabling and configuration info for this set up. Two basic questions before spending more time on this:

1. Can this be done (single USB cable, no USB to serial converter)?

+ Yes.

2. If so, is there a source of detailed, comprehensive info on setup of this configuration which covers setup options for 7610/WW/MMTTY/EXTFSK and any other setup requirements? Link appreciated.

+ See <https://www.dxlabsuite.com/dxlabwiki/FSKConnection>

+ Note 2.c beneath the first table describes the IC-7610's option to accept Mark/Space switching input via a modem control signal on its second virtual COM port

+ Step-by-step instructions are provided in the "Configuring WinWarbler for FSK operation" section.

73,

Dave, AA6YQ


Rick Boswell
 

Found one setting in the 7610 menus to be incorrect. My fault but the (Icom) documentation was pretty vague. Anyhow, in monitoring my RTTY FSK  transmission on a separate receiver or with the 7610 monitor I am now hearing what sounds like a proper RTTY signal. With virtually no RTTY signals on 20m today, was unable to make a contact to confirm operation. One issue I dont yet understand: in RTTY FSK mode I am seeing ALC level at about 75% of the red zone on the 7610. Not sure what to expect for ALC in FSK mode; the Icom manuals seem to be silent on this topic..

Rick
K8EZB


Dave AA6YQ
 

+ AA6YQ comments below

Found one setting in the 7610 menus to be incorrect. My fault but the (Icom) documentation was pretty vague. Anyhow, in monitoring my RTTY FSK transmission on a separate receiver or with the 7610 monitor I am now hearing what sounds like a proper RTTY signal. With virtually no RTTY signals on 20m today, was unable to make a contact to confirm operation.

+ Great! Perhaps Field Day will bring out a few RTTY ops this coming weekend.

73,

Dave, AA6YQ


Jeff AC0C
 

Rick,

Something to consider.  If the 7610 works FB on FT8 (or PSK31, other "sound card" modes), then it should work fine as well on RTTY/AFSK.  There's no actual benefit to FSK with that rig.  And depending on the implementation, somewhere from no to potentially significant weak signal degradation by the guy trying to copy you on the other end. 

Opinions vary, but if your setup is working well under AFSK, there's no reason to try for FSK - other than the technical challenge of it.  I run a bit of RTTY myself and you may consider this as in the "good advice" category, as far as internet advice goes.

73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com


On 6/22/20 7:30 PM, Rick Boswell wrote:

Found one setting in the 7610 menus to be incorrect. My fault but the (Icom) documentation was pretty vague. Anyhow, in monitoring my RTTY FSK  transmission on a separate receiver or with the 7610 monitor I am now hearing what sounds like a proper RTTY signal. With virtually no RTTY signals on 20m today, was unable to make a contact to confirm operation. One issue I dont yet understand: in RTTY FSK mode I am seeing ALC level at about 75% of the red zone on the 7610. Not sure what to expect for ALC in FSK mode; the Icom manuals seem to be silent on this topic..

Rick
K8EZB


Rick Boswell
 

On Mon, Jun 22, 2020 at 05:45 PM, Jeff AC0C wrote:
other than the technical challenge of it
This. Have had RTTY AFSK working well for some time. Thought I would tackle FSK. Forced me to learn more about 7610/DXL/WW/MMTTY/EXTFSK64 etc. When I got started in amateur radio in the fifties as a teen, RTTY with electromechanical gear was very appealing but I never got to it before my temporary retirement of 50+ years from ham radio. I doubt that I will use RTTY significantly in either AFSK or FSK modes going forward as the charm is not there without a clattering teleprinter, and, RTTY seems to be predominantly used for contests these day, with average transmission times of a second or two. But then I may have to develop an app that adds teleprinter sounds to MMTTY somewhat like the synthetic exhaust sound being played through the audio system in modern performance cars. ;-)

Rick
K8EZB