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+--- Wątek: Tranciever Тюльпан-DSP (/showthread.php?tid=1558)
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RE: Tranciever Тюльпан-DSP - HMAMATOR - 08-03-2016
Taki jak w oryginalej dokumentacji na stronie http://www.cqham.ru/.
RE: Tranciever Тюльпан-DSP - UA6VAE - 08-03-2016
Faced with a strange problem.
As I connect the DDS output to DDS(4) through NB3N3020 what I should use as DDS mux and Frequency factor?
I used 4 (DDS mux) and 1 (Freq factor) at this moment and heard very weak tone signal when test with Tone button and my scanner.
When i feed TRX with line in source i saw on FFT window actual signal pattern but heard nothing with scanner...
RE: Tranciever Тюльпан-DSP - SP3OSJ - 09-03-2016
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RE: Tranciever Тюльпан-DSP - UA6VAE - 09-03-2016
(09-03-2016, 9:03)SP3OSJ napisał(a): DDS -> X1 (Menu)Hi!
NB3N2030 -> X4 (Hartware)
NB3N3020 soldered to X4 with 0 Ohm resistance.
You mean:
DDSmux -1
Freq factor -4
?
Anyway, not working. From what point i need to start diagnostic?
RE: Tranciever Тюльпан-DSP - SP3OSJ - 09-03-2016
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RE: Tranciever Тюльпан-DSP - SP9KN - 10-03-2016
A ja z chęcią kupię kompletnego DDS-a lub samą płyteczkę do DDS TRX Tulip.
RE: Tranciever Тюльпан-DSP - UA6VAE - 11-03-2016
I am really frustrated about this SWR meter.
Why the ANT literally shorted to ground?
RE: Tranciever Тюльпан-DSP - SP3OSJ - 11-03-2016
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RE: Tranciever Тюльпан-DSP - UA6VAE - 12-03-2016
(11-03-2016, 23:46)SP3OSJ napisał(a): This is not a short circuit there is a transformer (inductance "L")!
Yes, it's inductance, but it have zero resistance and short all circuit (LPF, BPF) and TRX output/input directly to ground. Simply, if i'm apply test signal of 7Mhz from generator to ANT input, i see very weak signal on display, but if i'm disconnecting PA board and connect generator directly to TX input of TRX board, signal is very strong.
Maybe i have miss something...
Okay, one more thing i thought i shall mistake. Now i have shorted all inductance within LPF and BPF for 40m diapason (as i test on 40m), instead installing coils, it's just faster.
Is it critical? May be this is reason of signal loss?
RE: Tranciever Тюльпан-DSP - SP3OSJ - 12-03-2016
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