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eigenbau:presacler:start [2018/03/27 09:44] – [Schaltungsprinzip] meiners | eigenbau:presacler:start [2018/04/11 13:41] – [Kalkulation] meiners | ||
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==== Status ==== | ==== Status ==== | ||
/* reine Idee / Prototyp / fertig zur Massenproduktion ... */ | /* reine Idee / Prototyp / fertig zur Massenproduktion ... */ | ||
- | prototype in testing phase\\ | + | prototype in testing phase\\ |
- | effort for reproduction: | + | general concept works, some minor modifications needed (see ' |
+ | |||
+ | would be interesting to see if theres added phasenoise. | ||
+ | |||
+ | | ||
+ | effort for reproduction: | ||
==== Entwickler ==== | ==== Entwickler ==== | ||
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==== Schaltplan ==== | ==== Schaltplan ==== | ||
* {{ : | * {{ : | ||
- | * the source is created via KiCad and can be found on the git server: [[https:// | + | * the schematic and the pcb layout are created via KiCad and can be found on the git server: [[https:// |
==== Layout ==== | ==== Layout ==== | ||
* Size: 43 x 22 mm /* Höhe mal Breite in mm */ | * Size: 43 x 22 mm /* Höhe mal Breite in mm */ | ||
* Supply: +5V | * Supply: +5V | ||
- | * Logic; 3x 3.3 V or 5V optional | + | * Logic; 3x 3.3 V or 5V (optional) |
- | * Eingang: SMA, up to 1.1 GHz | + | * Eingang: SMA, up to 1.1 GHz (nominal) |
* Ausgang: SMA $ f_{out} = f_{in} / div $ (1.1 GHz / 10 = 110 MHz max) | * Ausgang: SMA $ f_{out} = f_{in} / div $ (1.1 GHz / 10 = 110 MHz max) | ||
- | * Der Bestückungsdruck: | + | * Der Bestückungsdruck: |
* Die Bestückungsliste: | * Die Bestückungsliste: | ||
* {{ : | * {{ : | ||
- | * Die Source des Layouts im pcb-Format liegt auf der [[: | ||
/* Das Layout als gerenderter Export vom EDA-Programm | /* Das Layout als gerenderter Export vom EDA-Programm | ||
Line 95: | Line 99: | ||
==== Test ==== | ==== Test ==== | ||
FIXME /* Welche Signale sollten wo zu sehen sein? */ | FIXME /* Welche Signale sollten wo zu sehen sein? */ | ||
+ | |||
+ | * Input a RF signal on the input. There should be a square wave output with a frequency according to f_in/div | ||
+ | * change div, the output frequency should change accordingly. | ||
+ | * | ||
+ | |||
+ | |||
==== Bedienung ==== | ==== Bedienung ==== | ||
- | FIXME | + | /* Was beim Einsatz zu beachten ist. Eventuell mit Anweisung zur Inbetriebnahme. */ |
+ | |||
+ | there are three logic input lines, whith these the division ratio can be programmed: | ||
+ | |||
+ | * 3x Low: div = 80 | ||
+ | * 1x High: div = 40 | ||
+ | * 2x High: div = 20 | ||
+ | * 3x High: div = 10 | ||
+ | it doesn' | ||
==== Bilder ==== | ==== Bilder ==== | ||
/* Photos vom Gerät. Wenn möglich und sinnvoll Nahaufnahmen von der Platine. Die | /* Photos vom Gerät. Wenn möglich und sinnvoll Nahaufnahmen von der Platine. Die | ||
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^ was ^ wieviel ^ E-Preis ^ Preis ^ Anmerkung | ^ was ^ wieviel ^ E-Preis ^ Preis ^ Anmerkung | ||
- | | | + | | |
| Gehäuse | 1x | ??.?? € | ~~=round(cell(1, | | Gehäuse | 1x | ??.?? € | ~~=round(cell(1, | ||
- | | | + | | |
- | | R,C | | + | | SN74LVC3G17 | 1x | 00.50 € | ~~=round(cell(1, |
+ | | R,C | | ||
| | | | ||
| | | | ||
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Was für die nächste Version zu tun ist: (:no:: verworfen, :Ok:: in Arbeit, :ok:: im Schaltplan, aber noch nicht im Layout, :OK:: erledigt) | Was für die nächste Version zu tun ist: (:no:: verworfen, :Ok:: in Arbeit, :ok:: im Schaltplan, aber noch nicht im Layout, :OK:: erledigt) | ||
- | * there seems to be a DC offset on the output. maybe a highpass on the output would be nice to get rid of it. For now I solved this issue by cutting the line between the load resistor (changed to 470 Ohm) and the removed load capacitor and soldered a 10 nF capacitor there. | + | * :OK: there seems to be a DC offset on the output. maybe a highpass on the output would be nice to get rid of it. For now I solved this issue by cutting the line between the load resistor (changed to 470 Ohm) and the removed load capacitor and soldered a 10 nF capacitor there. |
- | * the level of the logic input is not well defined, when disconnected. maybe add a pulldown. | + | * :OK: the level of the logic input is not well defined, when disconnected. maybe add a pulldown. |