o: ActiveSupport::Cache::Entry :@compressedF:@value"F "?
| Designs/HAM Constructions/SDRX01B/TODO.txt | ||
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| 1 |
- Je treba vyresit jinak spinani analogoveho prepinace. |
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| 2 |
D klopne obvody sice budou generovat vhodny LO signal, ale ne s potrebnymi urovnemi pro spinani CMOS hradla. PECL vystup klopneho obvodu dava presne katalogove hodnoty vystupniho napeti i po zatizeni 100ohm odporem a rozkmit je stale pouze 0,8V. Obvody pro translaci z PECL na CMOS asi nebudou vhodne reseni, protoze jsou tezko dostupne a navic za vysokou cenu. |
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| 3 |
<- bylo vyzkouseno zapojeni translatoru z patentu US3766406 s vysledkem, ze prestane fungovat na frekvenci okolo 50MHz. Nakonec bylo tedy rozhodnuto o pouziti integrovaneho translatoru. |
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| 1 |
- Zkontrolovat, že všechna napájení včetně přívodů do analogové části jsou řádně odrušena. |
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| 4 | 2 |
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| 5 |
Diky pouziti integrovaneho translatoru bude snizeno napajeci napeti digitalni casti na 3.3V. Tim odpada i nutnost stridave vazby na vstupu LVPECL hodin. |
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| 6 | 3 |
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| 7 |
Na zkusebnim prototypu se ukazala vaznost precizniho blokovani napajeni aby nedochazelo k prusaku ruseni z digitalni casti do analogove. Zda se totiz, ze pila generovana na vystupu operaku souvisi s blokovanim. Nebot existence pily je zavisla na frekvenci a vykonu LO. |
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| 11 |
- Zkontrolovat, že všechna napájení včetně přívodů do analogové části jsou řádně odrušena. A oznacena |
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| 12 |
- Oddelit napajeni LNA od napajeni vystupnich operacnich zesilovacu. |
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| 13 |
- Odpojit GND u vystupnich cinch konektoru. |
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| 14 |
- Pridat logo UST |
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| 15 |
- Zkontrolovat popisky |
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| 16 |
- Oznacit trimr. |
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| Designs/HAM Constructions/SDRX01B/DOC/SDRX01A.pdf | ||
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