Mark J Culross <mjculross@...
> Basil (n7nix):
> Thanks for your advice. I believe that I understand
all of your
> instructions & have executed them as directed,
but APRS RX is still
> not working.
In a console run this command:
tail -f /var/log/direwolf/direwolf.log
In another window run alsamixer for the udrc sound device
Increase the ADC level control until you see packets
If you are NOT able to see packets in the direwolf log
file then confirm
that BOTH your radio & DRAWS hat are using pin 5 (AF)
of the mDin6 connector,
ie. 1200 baud receive.
To confirm the DRAWS hat config assuming you are using the
connector run 'alsa-show.sh'. You should see:
IN2 L:[10 kOhms]
>I did find that I could make quicker modifications of
>connections/resistors using the DRAWS Manager
selection for the desired
>audio pin . . . does that have the same effect as the
>described & is it OK to use the DRAWS Manager to
>resistors connected to IN1_L & IN2_L ??
As long as you confirm changes with alsa-show.sh
> As Corky suggested, I tested the receive path using
> stopping AX25/direwolf) & BTW, I also had to
manually install libjpeg
> for fldigi to work,
libjpeg is installed on the image. If you ever run 'sudo
it will be removed and you will have to reinstall it.
> even though I am using the latest image (I found your
> instructions elsewhere on the forum). Using the
waterfall display in
> fldigi (with the radio still on 144.390), I did
confirm that audio is
> present on both pins (4/DISC & 5/AF) from the
IC-7000 in VHF/FM
> mode. Using either pin (4/5), I see the waterfall
change whenever I
> hear a packet on the radio & the waterfall goes
completely blank as
> expected when I select "OFF" for the left side DIN6
audio pin (udr0).
> As I mentioned to Corky, I have not yet done anything
> transmit path, other than cause a test position
message to be sent to
> verify PTT functionality. For now, I'm just
concentrating on trying to
> get RX of APRS to work, since I really thought that
would be the easy
> case !!
It should be easy. But each radio needs to be configured
and the ALSA
settings need to match and that, I think, is where your
You also might change your DAC Playback PT back to
DAC Playback PT L:[P3] R:[P3]
Make sure the radio receive preamp is turned off.
P.AMP/ATT button to left of screen
> Mark J CulrossKD5RXT
> On Sunday, September 13, 2020, 2:08:08 PM CDT,
Basil Gunn <basil@...
> First thanks for all the console output.
>> The radio (IC-7000) is attached to the left side
>> (udr0). I also ran the "setalsa-ic7000.sh" setup
> This could be your problem since that script tries to
set up deviation
> for the HF radio. You need to set deviation for the
VHF/UHF radio in the
> IC-7000. I would turn off discriminator receiver
routing and turn on
> compensated audio. I am not sure if the IC-7000 radio
> discriminator out for vhf.
> This is what you currently have, set by the setalsa
> IN1 L:[10 kOhm] R:[10 kOhm]
> IN2 L:[Off] R:[Off]
> You want to flip these controls for Left channel
manually. ie. turn off
> IN1 & have 10 kOhm for IN2.
> Run alsamixer from a console
> press F6, select sound card
> - select udrc
> scroll to the right until you find:
> IN1_L to Left Mixer Positive Resistor [10 kOhm]
> - turn that off by typing <down-arrow>
> Continue scrolling to the right until you find:
> IN2_L to Left Mixer Positive Resistor [10 kOhm]
> - turn that ON by typing <up-arrow> once only
> exit to save new settings
> Be aware that there are both positive & negative
resister controls ie.
> IN1_L to Left Mixer Positive Resistor [Off]
> IN1_L to Right Mixer Negative Resistor [Off]
> You only want to set Left Mixer Positive Resistor
> Verify by running alsa-show.sh
> You need to confirm your deviation.
> Go to this link
> This will lead you through how to output a steady
audio tone that you will
> monitor with an HT or some other radio in your shack.
> Be sure to read the John Ackermann N8UR link.
> /Basil n7nix