FreeDV with SignaLink & Yaesu FT-840 or FT-847

[Stewart]

Has anyone successfully used a Yaesu FT-840 or FT-847 with a USB SignaLink
for FreeDV over HF in SSB mode? The note in the SignaLink jumper
manual says:

On the FT-840 and FT-847 the 6 pin Data Port supports FM & LSB only. It may also
function on only VHF (Not HF).

I have successfuly used DStar over HF in FM mode using the
6 pin mini din port on the FT-847. To do this I use a DV Dongle,
Moencomm Starboard and a program called GMSK Client. The
rig is set to FM, Data and 9600 baud. Also, as a test, I put the
rig in SSB mode and it transmitted. However, SSB isn't compatible
with the DStar Ambe protocol. Also, the FT-847 can be set to 1200 baud.

So, my question is, what is unique about the Signalink that they say
restricts it to FM & LSB on VHF only for these two rigs? I sent this same
question to Tigertronics tech support.

Stewart WI3J

[Stewart]

I may have solved this. The SignaLink data cable for the FT-847, SLCAB6PM,
has the restriction of use only for FM & LSB on VHF. However, the SignaLink
8 pin mic cable for the FT-847, SLCAB8R (along with the mono cable from the
rig speaker or headphone jack to the SignaLink spkr jack) has no restrictions
(able to use all modes and all bands). I'll confirm this with Tigertronics tech support.

Stewart WI3J

[Bruce Perens]

An AMBE chip fed to SSB would look like FSK on the air, and would probably work but not optimally. A receiver that was expecting FM wouldn't demodulate it.
The main difference between 9600 and 1200 inputs is that pre-emphasis/de-emphasis is often present on the 1200 input, while the 9600 input directly FM's the radio with no other processing.

If the 847 won't take a "digital" input in USB mode, we could modify the software modem to invert.

Stewart <ten...@gmail.com> wrote:

I may have solved this. The SignaLink data cable for the FT-847, SLCAB6PM,
has the restriction of use only for FM & LSB on VHF. However, the SignaLink
8 pin mic cable for the FT-847, SLCAB8R (along with the mono cable from the
rig speaker or headphone jack to the SignaLink spkr jack) has no restrictions
(able to use all modes and all bands). I'll confirm this with Tigertronics tech support.

Stewart WI3J

On Thursday, April 4, 2013 2:40:45 PM UTC-4, Stewart wrote:

Has anyone successfully used a Yaesu FT-840 or FT-847 with a USB SignaLink
for FreeDV over HF in SSB mode? The note in the SignaLink jumper
manual says:

On the FT-840 and FT-847 the 6 pin Data Port supports FM & LSB only. It may also
function on only VHF (Not HF).

I have successfuly used DStar over HF in F M mode using the

6 pin mini din port on the FT-847. To do this I use a DV Dongle,
Moencomm Starboard and a program called GMSK Client. The
rig is set to FM, Data and 9600 baud. Also, as a test, I put the
rig in SSB mode and it transmitted. However, SSB isn't compatible
with the DStar Ambe protocol. Also, the FT-847 can be set to 1200 baud.

So, my question is, what is unique about the Signalink that they say
restricts it to FM & LSB on VHF only for these two rigs? I sent this same
question to Tigertronics tech support.

Stewart WI3J

--
Sent from my Android phone with K-9 Mail. Please excuse my brevity.

[jdow]

It sure as heck DOES accept input from the rear panel in USB mode.
I have one and it works fine USB/LSB/FM/AM. That port is a handy
means of feeding in equalized audio if you wish to play with those
kind of games. (It's remote control capability is lamentably weak,
though.)

{^_^} Joanne, W6MKU

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[Bruce Perens]

Huh? The FT-847 has USB? It's sort of old...

jdow <jd...@earthlink.net> wrote:

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[Bruce Perens]

Never mind. Must be tired....

[jdow]

Of course. It's not THAT old. I can't speak for the FT-840. The FT-847
is a 1.8 MHz - 450 MHz ham transceiver with satellite modes, all the
usual suspect modes like FM/AM/CW/USB/LSB, data and microphone audio
input and so forth. It looks from the picture of the 840 like the 847 is
the wide band and significantly newer version of the 840. The 847 is a
much more versatile machine dual VFOs and all.

I'd expect LSB to be missing before USB for anything above 7.3 MHz.
http://www.universal-radio.com/catalog/hamhf/1467.html for a picture
and some quick data on it.

{O.O} Joanne/W6MKU

> to digitalvoice...@googlegroups.com.

[jdow]

Ah so.
{^_-}

> to digitalvoice...@googlegroups.com.

[VK2JI - Ed Durrant]

U. S. B. - Upper Side Band

U. S. B. - Universal Serial Bus


I think different respondents have understood USB in different ways ??

73 Ed VK2JI.

[jdow]

Ah so - good call. However, does Signalink pass the USB signal through
to transceivers?

There is still this puzzler:

>>> I may have solved this. The SignaLink data cable for the FT-847,
>>> SLCAB6PM,
>>> has the restriction of use only for FM & LSB on VHF. However, the
>>> SignaLink
>>> 8 pin mic cable for the FT-847, SLCAB8R (along with the mono cable
>>> from the
>>> rig speaker or headphone jack to the SignaLink spkr jack) has no
>>> restrictions
>>> (able to use all modes and all bands). I'll confirm this with
>>> Tigertronics
>>> tech support.

That rather sets the context to SSB rather than a fancy serial bus.

{^_-} Joanne, W6MKU

[Stewart]

Joanne,

Just confirm that you successfully use the 847 and the SignaLink with the
6 pin mini din cable on HF with the various modes. If so, that's the
preferred way to go. I'm going to contact Tigertronics tech support
and ask why thay have that VHF FM & LSB only restriction with
this cable on the 847.

Stewart WI3J

[jdow]

I do not use the SignaLink (and based on its design won't ever.) I
do know that any limitation of the sort you mention is NOT an FT847
limitation. Nor can I see how it could be a SignaLink limitation. I
have used audio through the data port, the only way to go for digital
modes, on all modes on 75 meters, most modes on other bands through
450 MHz. There is no problem using this with Upper Side Band or any
other mode that I've encountered.

Unless the SignaLink interprets Yaesu commands there is no way I can
figure out for it to know it is on USB or CW. Use with USB should be
allowed for use above 7.3 MHz simply because that's the predominant
mode. Putting in a limitation is absurd for a manufacturer. I suspect
you are seeing effects of a wiring error or another problem that
exists.

It would be amusing to learn what you had to do to make the SignaLink
work. Personally I distrust using VOX based modes with digital data.
IIRC the SignaLink relies on VOX for TR switching. Your problem may be
linked to that.

{^_^} Joanne/W6MKU - uses a remarkably simple hand built interface.
I salvaged an RS232 switch box, drilled a couple holes, and
installed some L pads and transformers. It works as desired.

[Tony Langdon]

On 6/04/13 9:28 AM, jdow wrote:
> Unless the SignaLink interprets Yaesu commands there is no way I can
> figure out for it to know it is on USB or CW. Use with USB should be
> allowed for use above 7.3 MHz simply because that's the predominant
> mode. Putting in a limitation is absurd for a manufacturer. I suspect
> you are seeing effects of a wiring error or another problem that
> exists.

USB is also exclusively used for digital data modes. DV is an anomaly,
in that it tends to use the same sideband as for phone, because it
operates in similar parts of the band and this makes it easier to
communicate with any SSB operators who may appear on the frequency. The
situation with data modes makes any restriction on the use of USB even
sillier.

--
73 de Tony VK3JED
http://vkradio.com

[n8vnr]

Out of curiosity: What is it about the SignaLink that makes you avoid it?

[Chris]

The Signalink is merely a sound card and a PTT relay...that's it.  It works very well.

The "issue" around the 847 would have to do with what the pins on the 847 support and how they are feeding audio into the 847.  The "restriction" would have nothing at all to do with the Signalink.

Signalink is sound in, sound out, and PTT, that's it.

CAT control is handled however you would normally do that, nothing to do with the Signalink.

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--
73  de Chris -- KC2RGW
KC2RGW@W2LI.#NNJ.NJ.USA.NOAM
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[jdow]

VOX control.

{^_^}