Yaesu VR-901 Instruction Manual Download Page 6

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M

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This  switch  selects  the  operating  mode  for  the 

memory  system.  The  M  position  is  a  momentary 

switch  position, 

which  stores  in  memory  all 

characters  posted  on the TV  screen  up to the point 
where  the  lever  is  depressed.  The  reader  will 
continue  to 1ist characters  after  the  lever  is  pressed, 
though. The  MR  position  is  used  to  recall  up  to  a 

page  of  copy.  In  the  MR  position,  only  the 
memorized  copy  will  be  displayed  (not  any  sub­
sequent  characters),  but  the  YR-90 

will  hold  in 

another  register  all  copy  that  would  be  displayed, 

had  the  MR  position  not  been  selected.  Upon 
return  to  the  OFF  position,  the  TV  screen returns 
to normal monitoring. 

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ACR (Automatic Carriage Return) 

This  is  the  ON/OFF  switch  for  the  ACR  feature. 

When  four  consecutive  space  signals  are  received, 
the  ACR  feature  will  return  the  readout  to  the 

beginning  of  a new line. 

(9)  TTY  (50/45) 

This  switch  selects  a  50  baud  or  45  baud  rate  for 
TTY  operation.  With  the  TTY  switch  in  the  OFF 
position,  TTY  operation is not possible. 

(1 0)  F/L 

This is  the figure/letter shift switch for  ASCII use. 

(1 1 )  AS (Antispace) 

This switch activates the Antispace feature. 

(1 2)  NOR/REV 

Normally,  the  MARK  signal  for  teletype  is  at 

2125  Hz,  and  the  SPACE  signal  is  at  229 5  Hz 
(for  170  Hz  shift).  However,  the  mixing  scheme 
for  some  receivers  causes  these  relations  to  be 
reversed.  In  this  case,  the  NOR/REV  switch  will 
allow  a  reversing  of  the  input  MARK/SPACE 
relationship,  to permit proper operation. 

(1 3)  A.  START (Auto Start) 

The  autostart  feature  will  respond  to  the  first 

SP ACE  signal  received,  supplying 11 

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volts  AC to 

the  MOTOR  AC  OUT  jack  on  the  rear  apron, 

automatically  starting  the  motor  of  your  teletype 

machine. 

- 5  -

( 1 4)  SPEAKER 

The  audio  output  from  the  receiver 

is 

fed  to  the 

YR-90 

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speaker. 

(1 5)  Indicator  LEDs 

These  LEDs  display  the.  input  level.  Refer  to  the 
selection  on  Operation  for  details  of  the  proper 
adjustment  procedure. 

(1 6)  Mode Indicator  LEDs 

These  LEDs  light  up  to  signify  TX,  RX,  MARK, 

and  S PACE  conditions. 

Fig. 

Headphone  Plug 

Summary of Contents for VR-901

Page 1: ...INSTRUCTION MANUAL VR 901 YAESU MUSEN CO LTD TOKYO JAPAN...

Page 2: ...htp n e g a t i v etp a ne4tp p o s i t i v etp v i d e otp d i s p l a y stp m a ytp b etp s e l e c t e d tp A c t i v etp a u d i otp i n p u ttp b a n d p a s stp fi l t e r stp a s s u r etp o p...

Page 3: ...tp m o dea l a t o rtp n o ttp a v a i l a b l etp i ntp U S A tp 2 CW MONITOR Display modes L e t t e r s tp eI a p a n e s etp K a t a k a n atp c h a r a c t een s tp n u m b e r s tp p u n c t u a...

Page 4: ...tp N E 5 5 5eotp S N 7 4 L S O O Ntp S N 7 4 L S 0 2 Ntp S N 7 4 L S 0 4 Ntp S N 7 4 L S 0 8 Ntp eo N 7 4 L S 1 0 Ntp S N 7 4 L S 2eD Ntp ey N 7 4 L S 3 0 Ntp S N 7eF L S 3 2 Ntp S N 7 4 L S 5 1 Ntp 5...

Page 5: ...s i o n stp w i t htp atp s h i f ttp o ftp 1 7 0tp H z tp F K Stp 4 2 5tp t p T h i stp p o s i t i o ntp s e l e c t stp r e a d i n gtp o ftp F S Ktp w i t htp 4 2 5tp H ztp s h i f t tp F S Ktp 8...

Page 6: ...r 45 baud rate for TTY operation With the TTY switch in the OFF position TTY operation is not possible 1 0 F L This is the figure letter shift switch for ASCII use 1 1 AS Antispace This switch activat...

Page 7: ...ID 0 L w i t htp o ptm i o n a ltp L o c a ltp L o o ptp U n i t tp r e m o v etp t h etp j u m p e rtp b e t w e e ntp p i n stp 2tp a n dtp 3tp o ftp t h etp 6 p i ntp p l u gtp f o rtp t h i stp j...

Page 8: ...oring 13 RF OUT This is the output jack for the optional video modulator for television channels 3 or 4 tp Switching is performed inside the cabinet for selecting the unused channel in your area 14 AF...

Page 9: ...e dtp o u ttp b e fo r etp a p p l y i n gtp A Ctp p o w e rtp t otp t h etp Y R 9 0 1 tp R e f e rtp t otp t h etp t r a n s f o r m e rtp p r i m a r ytp c o n n e c t i o ntp d i a g r a mtp b e l...

Page 10: ...n using headphones to monitor the CW output please do not use the FT 901DM PHONES jack as this will cut off the output from the SP jack Instead use the PHONES jack provided on the YR 901 front panel F...

Page 11: ...a dash at the initial speed will appear to be a dot at three times that speed and the YR 901 will be unable to determine the proper ratio 7 Once the optimum copying tone has been secured you may swit...

Page 12: ...gtp i ftp y o utp c a ntp r e a dtp J a p a n e s etp c h a r a c t e r s tp 11 ERROR CAUSES W h e ntp t h etp Y R 9 0 1tp c a n n o ttp d i s t i n g u i s htp a ntp ieM c o m i n gtp c h a r a c t...

Page 13: ...wise By now you should be monitoring on the television screen the incoming RTTY message 5 Observe the display on the monitor screen If it appears that the figure letter relationship is reversed simply...

Page 14: ...r a t i o n tp T h etp Y R 9 0 1tp c o m e stp e q u i p p e dtp f o rtp p o s i t i v etp k e y i n g tp A NET E N N AI F o rtp p o s i t i v etp k e y i n geetp t h etp Y R 9 0 1tp K E Ytp j a c k s...

Page 15: ...i ftp y o u rtp k e y b o a r dtp l a c k stp atp 1 1 0tp b a u dtp c l o c k tp p l e a s etp r e fe rtp t otp F i g u r etp l O c tp f o rtp d e t a i l stp o ftp t h etp p r o p e rtp c o n n e c...

Page 16: ...r o ntp o ftp t h etp efo 0 9 0 1 tp O b s e r v etp t h etp p r o p e rtp c o n n e c t i o n stp a ttp J I a stp d e s c r i b e dtp i ntp s t e ptp 2 tp o ntp p a g etp 1 4 tp 2 tp S e ttp u ptp t...

Page 17: ...Ttp j a c k tp t h etp m a c h i n e stp m o t o rtp w i l ltp r e m a i ntOtp o f ftp u n tf i ltp atp S P A C Etp s i g n a ltp i stp r e c e i v e d tp W i t htp t h etp A tp S T A R Ttp s w i t c...

Page 18: ...p t r a n s l a t e dtp t otp 7tp u n i ttp c o d etp i ntp t h etp C o d etp C o n v e r t e rtp o ftp t h etp F S Ktp U N I T tp T h etp o u t p u ttp s i g n a ltp i stp t h e ntp a p p l i e dtp t...

Page 19: ...p u s i n gtp atp t r a n s c e i v e rtp u t i l i z i n gtp n e g a t i v etp k e y i n gtp s e etp l i s ttp o ntp p a g etp 1 3tp tp t h etp o u t p u ttp p o l a r i t ytp fr o mtp t h etp C Wtp...

Page 20: ...0 I I 1 II F 0 I I 000 0 I 0 __ 0 0 R I I 0 0 0 _ _ _ ___ __ 0 0 Lo _ ___ IF 02 02F 0 0 _ _ _ ___ _ J I2 0 S __ OI r 1 PI II II A0 l 0 I 0i OI II NI I I I I I I I K I I 02 02F 0 0 F 0I0 _J lI _ _ _ __...

Page 21: ...R 2 8tp t y p etp m a c h i n e tp t h etp ee u ree e ntptp r e q u i r e m e n t stp o ftp t h etp m a c h i n etp m u s ttp b etp m e t tp T h etp s t a n d a r dtp Y R 9 0 1tp w i l ltp n o ttp h a...

Page 22: ...c e s s a r y tp t otp o b t a i ntp a ntp i d e n t i c a ltp h a l fet s c a l etp d i s p l a ytp i ntp b o t htp t h etp N O Rtp a n dtp R E Vtp m o d e s tp 21 FSK BANDPASS FILTER ADJUSTMENT 1 tp...

Page 23: ...30 5 047 19 T9 2 0 1 600 5 047 05 5 047 1 2 1 0 11 100 11 SknB l OOknB 0 047 F lmH 3W P l 0 9 with wire Pl lO P l l 1 P l l 2 P1 1 3 P 1 14 P 1 1 6 P l l 7 F l O l F H l O l Symbo i N o PB 1 9 0 1 Q20...

Page 24: ...G l 090 1 9 8 SN7 4LS 1 25AN G 1 090 1 8 1 SN74LS 1 5 7N G 1 09 0 1 9 9 SN7 4LS 1 6 1 N G1 090200 SN74LS 1 66N G 1 090201 SN7 4 1 75 N G 1 090202 SN74LS 2 8 3N Q 3 0 1 Q302 3 05 ICS 306 3 0 8 ICS3 07...

Page 25: ...IC62 7 634 10 1 245 2 7 3 27kn IC604 10 1 245 3 3 3 3 3 kn IC605 10 1 245 6 8 3 68k 11 IC6 1 9 1 0 1 245 1 04 lOOk 11 IC6 20 10 1 245 105 l M 11 CA PA C I T O R K 7 0 1 27475 Tantalum 1 6WV 4 7 F SWI...

Page 26: ...641 64 8 65 1 C6 40 649 650 C6 2 1 629 C6 1 8 6 20 6 3 0 C6 3 1 C6 3 2 C65 7 C655 1602 608 1605 1 606 160 1 607 1604 1603 K 1 0 1 79006 KlOl 79007 K l O l 79008 K l O l 79009 K l O l 790 1 0 K 1 3 1...

Page 27: ...1 5 5 5 R ES I ST O R R802 100245 27 1 Carbon film 1 4W VJ 270n R803 1002455 6 1 _ _ 560n R80 1 100245 392 __ 3 9kn SW ITCH S80 1 N6090009 SS 1 2 L 1 6 Q5 0000 1 1 Wra ppi ng termi n a l C ACCESSOR I...

Page 28: ..._ r 1 1 0 0 I I 0 0 0 A NI L 0 C 0 0 0 2 F O _ F 0 0 2 F F 0 0 0 1 F _ 0 F _ F 0 _ _ _ _ 0 IuI 0 0 0 0 C 0 F F 0 F 0I 00F F F _0 I AI II I 1I I l SI 1I er 0R 0 0 A I A AI A I A I F F 0 1 F 0 1F 0 0 I...

Page 29: ..._ _ _ _ _ _ _ ___ PB _ _ ___ l_ 9 _ 5 1 N0 6 0 0 0 I I 0 o I J605 D 0 0 I 0 2 3 4I 5 60 7 I cp Pll3 J I 0 4 c 0 0l s 4 c 0 0 0 l 0I 0R0R0R f l l __ O0 C W 170 RT J I YI 4 425 20 00 I _ __ llo o U E 40...

Page 30: ...A L LI E S I S T SI A EI I N I I I I E N S SI EF 0 E RE l 0 S EI T E 0I 4I L LI A I II E REAI A R I I NI EI I I I E N R S SI OEP E RE IEA EI N OER E I I C 3 30 I 3 30 I C 4 20 I C 4F 0 9 I t t t OL_ I...

Page 31: ...l i s in FSK v fl a 0 0 0 0 LJ NOTE REGARDING WARRANTY SERVICE 6H2 62 Z22 2 2 2 2 HH2 2 H2 H2 2 2 2 H2 2 2 2 2 2 2 2 H2 2 HH2 H2 H 2 2 2 H2 2 2 o2 2 2 H2 2 2 2 2 2 2 2 2 HH2 2 Z 2 H2 HH2 H 2 wHH2H2 2...

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