开云体育

Before I start I will apologise to 90% of the users on this group because it might offend....THIS IS NOT MY INTENTION.
To Carl Schlueter..... I have to ask if you are really a licensed Ham ? The reason for asking is simple... most of the
Hams I know have at least a basic knowledge of electronics, this being the basis of the hobby.
It would appear that you have little or none! Clearly you have done NO homework on the item you have purchased
(from a reputable supplier) No doubt you have blindly plugged it in and blown it up before reading the instructions.
People on this forum (who many are VERY knowledgeable) have tried to assist you all to no avail.
You don`t listen, you don`t learn and above all you don`t try to help yourself.......its someone else`s fault !
Man up, grow up, and own it.
Ask for help, it will be given to you.......what you do with it is your choice, stop blaming others for your errors.
Hundreds of these units have been sold and are in daily use.......doesn`t that tell you something??
Dave
G4JBE (UK)

Anyone who cannot copy the Sbitx_V2 image to the SD card should not want to operate a radio with Raspberry Pi4.
First you need to learn how to use the Raspberry Pi.
Before I bought a Sbitx_v2, half a year ago I started to get to know a Rapsberry Pi-400, on which I tried to learn the basic things.
I've also posted a few things here that I've modified on the device.
This year was particularly strong for me. At the age of 72, I did a lot of physical work renovating the house and its surroundings.
I do all this for my grandchildren. But next to him, I took the time to connect with radio.
What frustrates me is that the person I'm trying to help ignores the help.
Today's youth...I could say.
It doesn't bother me if you stop and sell your device. It is your life.
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Gyula HA3HZ

Some of us buy a nice shiny sports car and have it serviced at the import dealer and some, like me prefer a Triumph TR6 that requires a lot of personal attention and work.? The HF Signals products fall in the latter category and I don't believe they ever tried to present them as anything different.? ?With the sbitx you can get under the hood and learn what makes it tick? I blew the finals because I was testing with a dummy load and forgot to reconnect the antenna, but it came with a couple of spares so it wasn't a big problem.? FT8 is a little flakey but it's a software problem that can and will be corrected.? I'm having too good of time learning to waste any complaining.
Barry KK4VT

Ultimately I ended up using the pi username (which the installer strongly recommended not to do so, but I suppose it is a nonissue considering the use case). I also had to make the appropriate changes to the build file for 64 bit ft8 and compile wiringpi separately, along with a few other minor differences in dependencies that I unfortunately did not document properly, as well as transfer some configs from the original SD card.

Anyway, I have Bookworm 64 bit up and running, touchscreen working fine purely through the DSI ribbon and 5v power. Sbitx appears to have compiled successfully, but I haven't managed to get anything working yet. I guess I also need to install and configure a few other things. I'll mess around with the original SD card on a regular monitor and try to compare what is different.

The install.txt in the github seems to end abruptly, is there some information that I am missing in order to fully set everything up?

Synopsis of the issue: my assembled sbitx v2 What for all of about an hour. Then it started to blow fuses. Soon as they flip the power switch fuse would ?blow. Contacted sales support, Thomas, and ?was sent a new motherboard. Carefully installing it when I turned it on at least I didn’t blow fuses but there was nothing ?after the various minor testing I determined it was the raspberry PI ?which obviously was damaged due to the original motherboard being defective. Thomas sent me an email containing some links and eventually telling me that I probably needed to buy a new RPI unit ?which I begrudgingly did. Install that PI with a SD card has formatted from Thomas nothing happens ?so back to square one reformat the card strictly to have raspberry pi OS on it up into the ?raspberry pi desktop. Nothing I have done has it been able to put the SBITX software on ?the latest venture was the file that direct me to do installed with Belena etcher (with rpi os). That results in a screen full of errors

I have repeatedly asked Thomas simply to send me an SD card with the necessary files on it ?that was not included with the new motherboard that was sent ?
Thomas now is not even bothering to answer emails. Users here as well as on Facebook have really not helped nor should it be their responsibility in something brand new like this ? I purchased what I thought was an assembled ready to go unit not some backwoods project.?

I would like for you to do one of two things either send me the SD card that will work or take the unit back and give me my money back. I do not wish to have instructions on how to make the SD card card When I should’ve had a fully functional one to begin with ?my investment so far is the $529 to SF signals and an additional $90 for an RPI V4 ?

yes I am completely frustrated and disgusted with his whole “adventure”. Going through messages I found quite a few people having the same types of issue with the lack of support. Had I known what I know now there is no way I would’ve bought this. When you pay good money for something you expect it to work and you do not anticipate having to go to a user community for problem resolution.?

Yes you are correct about the LO. The problem was that the mode was being changed in at least two different places, so there was on one place that I could put code to detect that the mode had changed from USB to LSB and thus change the LO to compensate. I put a print statement in set_mode and when I changed the mode from the front panel, it was not being called. Instead, it called sqr_request in which didn't call set_mode.
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73,
Mark, N8ME

Thanks for sharing that.

My solution was to put the change to the LO in both places where the mode was set. On my todo list is a re-write consolidating the radio commands into a single place where changes like this could be made.

I have a public GitHub repository at?. It was originally forked from Ashar's original code, but I've made lots of changes and I'm not intending to merge them back into the code.? I've removed the web interface as I prefer to operate the classic display. It's not well commented. I haven't commented most of my changes and I've left some of Ashar's comments in where I've changed the code to where they no longer apply. IOW, beware - use at your own risk. The latest code I pushed to it does run, but the spectrum and waterfall haven't been updated for my change to the LO.

I basically use the GH repository as an online backup of my local code, but anyone is welcome to look at it and use it if they find it useful.

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73,
Mark, N8ME

Ok. Never mind. I just brought a few plugs and the one that fits is a PSK 254. Just in case somebody else is searching for this.

On Wed, Oct 25, 2023 at 02:52 AM, Mark Erbaugh wrote:

One thing: I was looking for a single place in the code to detect mode change, but could not find one. The mode appears to be changed in both set_mode (sbitx_gtx.c) and sdr_request (sbitx.c), so currently I'm changing the LO in both places.

That's what I am looking for too. Did you come up with a solution for this? And are your code changes public somewhere? Thx

That explains something I noticed with my code. The audio sounded fuller. That’s due to the filter skirt difference.
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73,
Mark, N8ME

Well, I hacked in the code to change the Local Oscillator (clock 1) between 40,035,000 (current default) for USB modes and 39,987,000 for LSB modes.

Seems to work.? I still need to adjust the spectrum and waterfall.

One thing: I was looking for a single place in the code to detect mode change, but could not find one. The mode appears to be changed in both set_mode (sbitx_gtx.c) and sdr_request (sbitx.c), so currently I'm changing the LO in both places.

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73,
Mark, N8ME

Ah, Harry Nyquist ... I remember as an engineering student at North Dakota State University learning that Nyquist was a graduate of the University of North Dakota just up the road in Grand Forks. Made me proud!

I just discovered this on his wiki page ... "Bell Labs patent lawyers wanted to know why some people were so much more productive (in terms of patents) than others. After crunching a lot of data, they found that the only thing the productive employees had in common (other than having made it through the Bell Labs hiring process) was that "Workers with the most patents often shared lunch or breakfast with a Bell Labs electrical engineer named Harry Nyquist. It wasn't the case that Nyquist gave them specific ideas. Rather, as one scientist recalled, 'he drew people out, got them thinking'"

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Mike - kb2ml

I am thinking of doing it. I hadn't seen the comment in the code. I just thought I'd ask if there was some compelling reason not to try. Why spend a lot of time on something that you had already figured out wouldn't work.

I've replaced the initial DFT on the receive signal from the original complex to complex one with the real to complex one in FFTW3. That one doesn't generate the bins above half way (Nyquist frequency) so I've had to adjust the code. I've already fixed the agc calculation and the spectrum / waterfall display to use only the lower bins, but I still had to write code to invert the sideband.

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73,
Mark, N8ME