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In playing around with the menu's on the ubitx I seem to have somehow
gotten the LSB calibration so far out of whack I can't hear anything.

With the dial set to 3.925Mhz I hear nothing. Moving the signal
generator to 3.938Mhz indicates a signal being received but no tone.

Do I just need to reload the firmware to start over? Or is there an
easier way to reset to default values?

tim ab0wr

Tim, I did the same thing and a reload of the firmware corrected the problem.

Skip Davis, NC9O

Skip,

Thanks for the reply. I did as you said. I had to reload about four
times! Seems like a register value was not getting reset when I did the
reload or something. It finally took tho!

tim ab0wr

On Wed, 21 Mar 2018 14:29:23 -0400
"Skip Davis via Groups.Io" <skipnc9o@...> wrote:

Tim, I did the same thing and a reload of the firmware corrected the
problem.

Skip Davis, NC9O

On Mar 21, 2018, at 14:22, Tim Gorman <tgorman2@...> wrote:

In playing around with the menu's on the ubitx I seem to have
somehow gotten the LSB calibration so far out of whack I can't hear
anything.

With the dial set to 3.925Mhz I hear nothing. Moving the signal
generator to 3.938Mhz indicates a signal being received but no tone.

Do I just need to reload the firmware to start over? Or is there an
easier way to reset to default values?

tim ab0wr

I made the error of clicking the encoder instead of pushing PTT when trying to zerobeat WWV while having that high pitched tone come in, I found that the BFO got a saved shift point up +2kHz.

I ended up sitting down a few weeks ago and working out steps since it didn't always get saved.


Tune to WWV on the dial
Enter menu
Turn setup on
Reenter menu turn to and select calibrate
Zerobeat the WWV carrier. (May be difficult if BFO is too far off.)
Click PTT.
Click encoder, select set BFO.
Zero the sideband off WWV. (My BFO frequencies were 11.997.0 and 11.995.0 for each sideband it's been 3 weeks)
Click PTT to set.
Click encoder, turn setup off.
Wait more than 10 seconds to ensure setting are saved before removing power.


Due to local noise I made a few attempts to set it correctly on a local AM station. Usually I set the sideband side wrong, so I had to go in change the BFO again. Due to rushing myself, I'd click "Calibrate" instead of "Set BFO" screwing me up to start all over again.

I need to go look at the code to see if the calibrate function just adjusts the ppm of the Si5351 or does something else. Either way, I got put off working on my uBitx until I figured the calibration routine out.

Jacob,

This sounds like what I probably did!

I'm not sure what you mean by "zero the sideband off WWV".

Do you mean set it so it sounds the best?

tim ab0wr

On Wed, 21 Mar 2018 19:37:25 -0700
"Jacob Farnes via Groups.Io" <kk6jtl@...> wrote:

I made the error of clicking the encoder instead of pushing PTT when
trying to zerobeat WWV while having that high pitched tone come in, I
found that the BFO got a saved shift point up +2kHz.

I ended up sitting down a few weeks ago and working out steps since
it didn't always get saved.

Tune to WWV on the dial
Enter menu
Turn setup on
Reenter menu turn to and select calibrate
Zerobeat the WWV carrier. (May be difficult if BFO is too far off.)
Click PTT.
Click encoder, select set BFO.
Zero the sideband off WWV. (My BFO frequencies were 11.997.0 and
11.995.0 for each sideband it's been 3 weeks) Click PTT to set.
Click encoder, turn setup off.
Wait more than 10 seconds to ensure setting are saved before removing
power.

Due to local noise I made a few attempts to set it correctly on a
local AM station. Usually I set the sideband side wrong, so I had to
go in change the BFO again. Due to rushing myself, I'd click
"Calibrate" instead of "Set BFO" screwing me up to start all over
again.

I need to go look at the code to see if the calibrate function just
adjusts the ppm of the Si5351 or does something else. Either way, I
got put off working on my uBitx until I figured the calibration
routine out.

Yes, tune the carrier to 0Hz (tone? goes quiet/away). In mine a high-pitched tone appeared and confused me, so take your time and try to ignore the birdy signal.

The problem with doing it to an AM station is that you can reverse USB and LSB, so having something to check immediately after calibrating is a good idea. FT8 tends to be busy enough even when the ragchew nets have gone to sleep.

If you can't hear them on 7.074 LSB (except for the one guy in low tones), but booming in on 7.074 USB you've got it right.

When I got my uBitx, the sidebands were reversed from the factory in the Raduino. Which was fine until the auto-sideband switch flipped it back on me. That's where I started to check the tuning and calibration.

I kept seeming to make it worse each time I tried to make the calibration. Took a week off to clear my head and come back to looking at it.

I hope I've been helpful despite seeing a few details I could be more explicit about.

73 de Jacob AG7CT

On Wed, Mar 21, 2018 at 08:13 pm, Jacob Farnes wrote:

When I got my uBitx, the sidebands were reversed from the factory in the Raduino. Which was fine until the auto-sideband switch flipped it back on me.

What does this mean?? There was something wrong in the software as installed?

Jacob,

You've been *very* helpful. I tried your suggestion about 7.074 and
it's now exactly like you describe!

Hopefully others will benefit from your comments also.

Thanks,

tim ab0wr

On Wed, 21 Mar 2018 20:13:06 -0700
"Jacob Farnes via Groups.Io" <kk6jtl@...> wrote:

Yes, tune the carrier to 0Hz (tone? goes quiet/away). In mine a
high-pitched tone appeared and confused me, so take your time and try
to ignore the birdy signal.

The problem with doing it to an AM station is that you can reverse
USB and LSB, so having something to check immediately after
calibrating is a good idea. FT8 tends to be busy enough even when the
ragchew nets have gone to sleep.

If you can't hear them on 7.074 LSB (except for the one guy in low
tones), but booming in on 7.074 USB you've got it right.

When I got my uBitx, the sidebands were reversed from the factory in
the Raduino. Which was fine until the auto-sideband switch flipped it
back on me. That's where I started to check the tuning and
calibration.

I kept seeming to make it worse each time I tried to make the
calibration. Took a week off to clear my head and come back to
looking at it.

I hope I've been helpful despite seeing a few details I could be more
explicit about.

73 de Jacob AG7CT

The Factory software automatically switched LSB to USB when tuning above 10MHz and USB to LSB when tuning below 10MHz.

For whatever reason my uBitx had the wrong BFO frequencies saved as it came shipped. While the screen said USB I was hearing LSB and vice versa.?

I attempted to fix this using the Raduino calibration process, but made the mistake of clicking the encoder switch instead of clicking PTT. After repeating the process a few times the audio out sounded way different (higher overall pitch after each attempt) and I could not hear anything but static out even on known local AM stations.

When I switched to Ian's firmware I got to see the stored frequency for the sideband I was on. (Others may show that but I hadn't the clarity of mind to recognize it like I did the day I switched to Ian's firmware.) The LSB BFO frequency was way up at 12002.xxx

I looked at the code for the default BFO (11995.000). I then tuned the calibrate BFO there and saved by clicking PTT. Tuned around to check if that was USB or LSB now saved for my LSB BFO frequency.??

Using the menu again, I switched mode to USB, then selected Calibrate BFO. (How many times I screwed up here and went into the menu just before and had to set the right offset again... Which seemed to keep changing... :-P) I then found then default in the code (11997.000) USB BFO frequency to be perfect for my filter as well.

Disclaimer: I'm at work away from my uBitx and notes. The default BFO frequencies were correct for my filter.?

Whichbelongs to which sideband I'll leave to the future operators running the tune up process. I'm writing this up in case someone else runs into the same issues in the future.

73 de Jacob AG7CT

Glad to hear Tim. I hope it will be useful later as well. I'd rather get the code fixed. I need to sit down and noodle through that to find what needs a change.

Sounds like we are both ready in time for CQ WPX SSB

Enjoy your kit!

73 de Jacob AG7CT