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s tnc2 <dg8fz @ww $91C291dg8fz #0 XR2211-DCD-Values here a little table for xr2211-dcd-usage on other FSK-Tones: GND>-------*-----*-----+ P C C 1 5 4 +-C6-+ *-R5--* ! Comp.Input +--#----#----#-----#-----#-----#-----#-+ I 14 13 12 11 10 9 8 I > XR2211 (FSK-Demodulator) I I 1 2 3 4 5 6 7 I +--#----#----#-----#-----#-----#-----#-+ +5V>+ C +-*-+ ! --- ! ! 1 R1 C2 ! DCD DCD Comp.Out (NF in)>-+ +-*-+ ! ! ! ^ ^ ^ GND>---*-----+ ( open Collector ) . 1200bd . 2400bd .1200+2400. 4800bd .1200-4800! 300bd . RTTY ...................................................!..(AM7910-TONES).. . 1200/ . 1996/ . 1200- . 4331/ . 1200- ! 1650/ . 1408/ . 2200Hz . 3658Hz . 3658Hz . 7939Hz . 7939Hz ! 1850Hz . 1578Hz C6= .22 nF . 22 nF . 22 nF . 10 nF .10 nF ! 22 nF . 22 nF P1<>.27 KOhm. 16 KOhm. 19 KOhm. 17 KOhm.22 KOhm! 26 KOhm. 31 KOhm R5= .56 KOhm. 27 KOhm. 18 KOhm. 27 KOhm.14.8 KOhm!220 KOhm.270 KOhm C2= .150 nF .100 nF .100 nF . 50 nF .100 nF !100 nF .100 nF .(16) .(10) .(6.8) .(4.4) .(2.4) !(82) . C1= 100 nF C4= 100 nF C5= 4.7 nF R1= 470 KOhm ! the value of C6 should not change by temperature ! ! 1200-4800bd is problematic, better use 1200-2400- (AND) 4800-version ! see: -XR2211-DCD in 'TNC2' by DL1EBQ @ DB0IZ (or transl. by dl1men @ db0cz) or XR2211 application manual (figure 11 + table-1 component values) -CQ-DL 6/87 page 370 or ur modem-manual -Digicom-User see: XR2211-DCD in 'DIGICOM' by DG8FZ @ DB0SAO (that's me) -KAM -User see: XR2211-DCD in 'KAM' by DC5JQ @ DK0MWX layout + adjustent: see article in 'TNC2' by DL5FBD @ DB0GV 73 de karl (dg8fz @ db0sao.deu.eu) 28.Jul.88 , 6.Mar.91 ***end

 

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