Summary of Contents for Curtis Computer kb4900
- Page 2 k:I3——4l‘9(3(3 BAUDOT MORSE ASCII, KEYBOARD ONNER’S MANUAL TABLE CONTENTS: Description ....Commands ..Specifications..... Dperation....General Operation....12v. Operation ..Circuit Functions ..Ca1ibration..... Case Difficulty ..Limited Warranty..Program Revisions..Changes Assembly Drawings Schematics... Code Practice Lists..Appendix CIRCUITS EPROM...
- Page 3 *'#’* ]IhJ1‘F?C3I)LJCZ1’1ZC)rJ *»#i* #.I:# KB—490O Your Unlike product computer predecessors age. KB—42OO this unit does discrete dedicated KB-4800, parts function. perform Instead, employs "all purpose" called integrated microprocessor. This device does nothing itself, however, when provided with list will them instructions, doing, carry...
- Page 4 ltttiilttttItliiiltttItitttttXttttttltltiltiltittlIllXlttttlltliltlttKXXIIXIII ‘XiIllltltllltttlltlIlltlltltltttlilltXtittttIll1331!tlttltttllltllltttttXI!!! (2LJF?1'1IE3 EEL.EEEZ1"F?CJ IDEEKI CZEZSB rut: k{E3—~4l‘?(3<) £§E3(3 P4c)r‘ssee, h h h aar1ci E3eaL1cic31: Duner’s ...Revised 01-23-81 Hanual....... IIIXXIttttlttltltllillititltlIXII1!IitXXIXllllttltltlittlllttttlllllltltltlttl Ill!XllllltltttltX13118!!!Illltttttltttlllltlttttttttllttlttttlltllttttttttltt P1F§{IC3F? F:EE¢§1_LJF?EEE3- FROH KEYBOARD ISENDS MORSE MANUAL XSENDS HORSE FROM PADDLE KEY, TRUE RANDOM HORSE CODE PRACTICE ISENDS GROUPS N/ANSWERS PSUEDO...
- Page 5 Automatic bu11t'in follows: provided messages "KbKU") (message (i.o. TEST (message (This "ID" (message key) (message “A“) (Note that these appended programmable message prevents lost characters lockout operation keyboard "burst" typing. during "DELETE" allows correction prior transmission. errors serial number from 9999 available automatic...
- Page 6 NURSE PRACTICE: Mode Random random characters sent length groups never selected control. Extra repeating speed speed sequence characters selected when spacing between study trying easier make large speed increases. Mode Psuedo random five character sent, however, unlike groups true random this second mode...
- Page 7 CTRL—3 MDDE: ASCII SHIFT/. saxrr/, BELL: SHIFT/AS RTTV "X9. CTRL-"ID" CTRL—4 (standard RANDOM CODE: spacing) (extended SLOW NUDE: CTRL-5 spacing) thru "8" "A" NUDE Place letter other than message "A" MODE Place letter "1" through "E" message memory SHIFT Press SHIFT hold release,...
- Page 8 SH/"C"! A]); type MESSAGE [message SH/"D”t TEST TEST [message AJ); type “ID” "ID" SH/"B"! MESSAGE: release) (CTRL PRELUAD BUFFER: SHIFT/SPACE (CTRL release) BUFFER: SHIFT/SPACE HOLD LAST KEY: "DELETE" DELETE (from buffer only) "DELETE" sending DELETE LAST WORD: MESSAGE RESET: RESET! RESET: RESET! BUFFER...
- Page 9 INTEGRATED CIRCUIT CDHPLEHENT: 74LS75 B035, 2732. 2114, (2), 74LS1b4, B044, 741-LS175, 7805 lLD74(3), Euxth real-time clack HC14518B (3)1 option INPUTS: RECEIVER AUDID...B Ohm! PADDLE KEY..Single twin lever (optically xsolated) MANUAL ..Telegraph isolated) (optically ..10 Vdc..OUTPUTS: KEYLINE... 500mA 300V, relay max.
- Page 10 C3F°EZF?é§1']iC3FJ- KB—4900 between cable interconnections Note: shielded units including keys. other !!X38XtllMPDRTANTtItltX transmitter cables before connecting connect Always from minute leakage This prevents problems line KB~4900. KB—4900 from line bypass capacitors line voltage using, unit equipped make Also, sure either Vac.
- Page 11 "TUNE/DP/SELF—TEST" “UP” transmitter will switch Move transmitter either typing mode. tune CTRL-9 "TUNE/OP/SELF-TEST" switch "TUNE". CTRL-9 placing transmitter dots avoid overheating string will give "TUNE" switch holds down protracted tuning. final stage during line. both keyline both keyline keyboard paddle, either from sending...
- Page 12 RTTY want drive external Output: equipment your current unit with level instead loop, removing open from four bottom jumper plug remove screws level PCB. This good keyboard puts rear also drive marked "TTL TTY". This will satisfactorily jack signal don’t level receivers.
- Page 13 CJF>EEF?£)‘r.IC3fQ- C3EEDJEEF?£§l_ least when load first step begin operation Usually will "A" since constantly. Preloading messages message memory "B“,"C" contest load "D" option. use, messages your serial number which will here will obvious except perhaps "A“,“B" memories "C" such "UR fashion inserted --—-,...
- Page 14 when serial number increments accessed message memory, before transmitting. i.e., preset 0000, first number sent will (OOOX). have problem during message memory contest with numbers increment getting line, CTRL—l serial decrement CTRL-D. typing typing serial number gets line, preset track. Note that decrement...
- Page 15 MESSAGE REPEAT DELAY: PRESETTING white memories simply striking repeat message message mode from delay delayed repeats repeatedly CTRL-- (dash) load delay figure seconds, type seconds. seconds). numbers delay desired Type then representing type less number First (the TENS digit). number most significant when...
- Page 16 OPERATION VDC: Your KBv48OO from operated batteries from mobile system. also power battery continuously connected battery backup failure. case With power battery voltage below about there should little drain long unit powered Connect battery cable KB-4900 before applying other power short spectacular center...
- Page 17 Buffer meter calibration: Another trimmer controls keyboard buffer meter calibration. Press SHIFT/SPACE(bar) place unit preload position. Then random type keys until buffer fills DVERFLDN NARNING lamp lights. three more fill then keys completely buffer, adjust trimmer marked "b" until keyboard buffer meter indicates...
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