Signalink USB audio not being transmitted?

[Mobile1]

Am using Tigertronics's K3 cable connected to the K3's line in and line out.

No software is able to transmit the audio with a Signalink USB connected to my K3.  The PTT light comes on, and the K3 goes into transmit, but I see no power going to the antenna, and no ALC.

I connected a speaker to the Signalink's "Mon" jack and I can barely hear the audio being generated by software (fldigi and RMS Express).  I think this might be a line level problem?

Does anyone know how to make this work?

Thank you for your help.

[KD4NUE]

Hi,

Make sure that RMS Express shows USB CODEC (USB CODEC 2, etc) as the sound device, then open Windows Sound Applet and push the Speaker Volume as well as Wave Volume up above 75%.  If it is going into transmit, it already has a path.

The CONFIG:LINE OUT should control the sound going out of the K3.  Start at 7

To get the cleanest signal, first set your output power to 100%.

Transmit a WINMOR signal and adjust the TX Level on the SignaLink until the ALC just begins to register.

Observe output power and back the TX level on the SignaLink down until the power starts to drop off.

At this point you are sending a clean wave form, and you can decrease the output power of the rig if you desire.

If you do it the other way around; starting with a low output power, and try to build that much actual transmitted carrier, you will run too far into the ALC every time.  

In RMS Express, against everything you have learned about AGC, WINMOR has to see a change in signal to noise ratio to zero in on the data.  Don't ask me why, but use slower AGC than you would on other digital modes.

I run KD4NUE-5 on 7079.5 USB  if you would like to email me and let me view your signal from the other end, use KD4NUE at arrl dot net, and if the prop gods are kind, we can set up a time.

from the manual......  

• DATA A can be used for all Audio-shift transmit modes, including PSK31, MFSK, AFSK, etc. The VFO displays the suppressedcarrier frequency, just as when SSB modes are used for data. USB is “normal” for DATA A.
Compression is automatically set to 0.

• Connect modem audio I/O to the K3’s LINE OUT and LINE IN jacks (for LINE OUT, use the TIP contact of a stereo plug). A PTT connection is also usually required. If the modem operates from 12 V (0.5 A or less), it
can be powered from the K3’s 12 VDC output.

• Set up the modem (if applicable). Settings may vary depending on the data mode being used.  

• Locate CONFIG:LIN OUT and set it to 10. A different level may be better for your modem.

• The K3’s SYNC DATA feature can be used to minimize T-R delays (it forces the same crystal filter to be used for both receive and transmit).  Locate CONFIG:SYNC DT. Assign it to a programmable function (e.g., by holding PF1 ), then exit the menu.

• Tap MODE to select DATA.

• Select an appropriate data sub-mode by holding DATA MD, then rotating VFO B. DATA A (generic data mode, USB) is used in most cases;  Tap AFX to exit the parameter display.

• Locate MAIN:MIC SEL and set the audio source for data to LINE IN. Exit the menu.

• If you wish to use SYNC DATA, turn it on by holding PF1 (or the switch used above). The –S icon will appear. A CONFIG:PTT RLS value of 10 to 12 may be ideal in this case.

David
KD4NUE