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FMS Forum • View topic - Probleme mit dem seriellen Interface - starke Signalschwankungen

Probleme mit dem seriellen Interface - starke Signalschwankungen

Postby wf » Mon Jan 22, 2001 12:13 pm

hallo

ich habe mir lt. anleitung ein serielles interface für meine fernsteuerung graupner mc16/20 gebaut.
nach einstellung von port und irq hat sich der zustand von "kein signal" auf "signal verbunden" verändert - so wie es sein sollte.
bei der kalibrierung ist es allerdings unmöglich eine brauchbare einstellung zu erreichen. alle paar sekunden tritt ein starkes störsignal auf, welches alle angezeigten kanäle erheblich beeinflußt.
ich habe bereits einige maßnahmen (abschirmung, kürzeres kabel) ergriffen, um die störungen zu beheben. leider hatte ich damit keinen erfolg.
Hier also meine frage:
hat oder hatte jemand ähnliche probleme oder gibt
es vielleicht jemanden eine lösung hat ?

ersuche um antwort

walter
wf
 
Posts: 2
Joined: Mon Jan 22, 2001 12:08 pm

Postby Stefan » Tue Jan 23, 2001 4:56 pm

Tip: Spannungsteiler nach dem Eingangswiderstand (100kOhm) dann hats bei meiner X3810 und MC15 funktioniert. Vorher hab ich das Signal nach ein paar Sekunden verloren.
Stefan
 
Posts: 2
Joined: Tue Jan 23, 2001 4:53 pm

Postby sandyman » Tue Jan 23, 2001 5:45 pm

Hi!
Hab das selbe Problem mit dem seriellen Kabel, ich hab aber keinen 100 Ohm Widerstand sondern 4 Stk 6,8 KOhm auf meiner Platine?? Also was soll ich nun da zusätzlich reinlöten?
thanks
sandyman
sandyman
 
Posts: 1
Joined: Tue Jan 23, 2001 5:41 pm

Postby Stefan » Wed Jan 24, 2001 9:51 am

Also: nach dem Eingangs R (6.8 KOhm) einen 90-100 KOhm R auf Masse setzen. (von der Verbindung 6.8K R - TransiBasis -> auf Masse)

6.8 KOhm |/
---HHHH----+----|
| |\
H
H 100 KOhm
H
|
-----------+--------------
Stefan
 
Posts: 2
Joined: Tue Jan 23, 2001 4:53 pm

Postby wf » Sat Jan 27, 2001 9:18 am

hallo stefan !

Danke für den wertvollen tip - funktioniert ausgezeichnet.

walter
wf
 
Posts: 2
Joined: Mon Jan 22, 2001 12:08 pm

Postby Paulmartel » Tue Mar 13, 2001 8:43 pm

Hello,
If you can read french language, i suggest you to go and see the french web site: www.aero-modelisme.org
But there are drawing for cable and I think you will understand the topic.
Best regards.
Paul
Paulmartel
 
Posts: 2
Joined: Tue Mar 13, 2001 8:38 pm
Location: Puteaux, France


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