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allgemeine Kategorie / OVI40 SDR Projekt (English AND German discussions around OVI40 SDR project) / Re:My new TRX "SParrow" |
am: 20. Juli 2019, 17:33:27 |
| Begonnen von SP3OSJ | Letzter Eintrag von peter_77 |
| I look for a professional build like plug and play |
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Maybe this is the wrong place and you should look for a IC7300 or Elecraft.
On the other hand Artur sells plug and play SParrows as well !
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allgemeine Kategorie / UHSDR Firmware / Re:STM32H7 series revision: Beware of the changes! |
am: 19. Juli 2019, 20:06:30 |
| Begonnen von dl8mby | Letzter Eintrag von DB4PLE |
Hi,
using a slight modification to Dave's motto from the EEV blog: "There is only one way to find out, take it apart solder it in its place".
I looked through the difference between the revisions, and the only ones relevant for us are
- the divider of the ADC provides now half the clock to the ADC but we are not nearly close to the max frequency when sampling, so I guess, not a problem.
- Flash write sequence changed: This could apply to us, but that would only affect the bootloaders ability to flash firmware and the flash config storage. If this is the case, we can easily fix that in software, but you would in any case have a working board with only minor fixable problems.
73
Danilo
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allgemeine Kategorie / mcHF Projekt Deutsch / English (here you can discuss everything related to mcHF) / Re:Odd Ver 6.2 |
am: 19. Juli 2019, 05:50:55 |
| Begonnen von WD8BXS | Letzter Eintrag von DF8OE |
Red digits mean communication with SI570 is broken.
Mostly bad solderings are the reason (SI570 footprint is not ideal so there are many bad solderings, and at STM32 there can be some at I2C pins, too).
vy 73
Andreas |
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| 5 |
allgemeine Kategorie / mcHF Projekt Deutsch / English (here you can discuss everything related to mcHF) / Re:Odd Ver 6.2 |
am: 19. Juli 2019, 04:43:40 |
| Begonnen von WD8BXS | Letzter Eintrag von WD8BXS |
So, red digits mean si570 is defective??? 
Chuck |
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| 6 |
allgemeine Kategorie / mcHF Projekt Deutsch / English (here you can discuss everything related to mcHF) / Re:Odd Ver 6.2 |
am: 18. Juli 2019, 20:37:50 |
| Begonnen von WD8BXS | Letzter Eintrag von OE3HKC |
don't worry be happy
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| 7 |
allgemeine Kategorie / mcHF Projekt Deutsch / English (here you can discuss everything related to mcHF) / Re:Odd Ver 6.2 |
am: 18. Juli 2019, 19:53:59 |
| Begonnen von WD8BXS | Letzter Eintrag von WD8BXS |
Having a bad day here.
Working on a different board it now has red digits!!
Maybe should have stayed in bed, hihi
Chuck |
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| 8 |
allgemeine Kategorie / mcHF Projekt Deutsch / English (here you can discuss everything related to mcHF) / Re:Odd Ver 6.2 |
am: 18. Juli 2019, 17:34:16 |
| Begonnen von WD8BXS | Letzter Eintrag von DF8OE |
You got it.... There is something on rf board what pulls down voltage at paddle_dah so that MCU goes sporadically to TX. So now you have to investigate what part is the cause. There are not sooo many - you will find it 
Good luck!
vy 73
Andreas |
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| 9 |
allgemeine Kategorie / mcHF Projekt Deutsch / English (here you can discuss everything related to mcHF) / Re:Lost IQ adjustment |
am: 18. Juli 2019, 16:33:22 |
| Begonnen von WD8BXS | Letzter Eintrag von WD8BXS |
OK, will test that circuit later.
Thanks
Chuck |
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| 10 |
allgemeine Kategorie / mcHF Projekt Deutsch / English (here you can discuss everything related to mcHF) / Re:Odd Ver 6.2 |
am: 18. Juli 2019, 16:32:26 |
| Begonnen von WD8BXS | Letzter Eintrag von WD8BXS |
I pulled the number 12 pin from the 30 pin header and the problem goes away.
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