Capacitor Electrolytic, IC Sockets, ICs

MFJ-1278B MULTI-MODE		APPENDIX I PARTS LIST
MFJ P/N	Descrpition	Component ID
Capacitor: Monolithic Ceramic
205-1210	.1 UF, Z5U, 20%	C301, C304
Capacitor: Electrolytic
203-0012	10 uf, 16V, Radial	C302, C303
IC Sockets
625-0031	14-pin Socket	U301, U302
625-0030	16-pin Socket	U305, U306
625-0291	20-pin Socket	U303, U304
IC's
310-3074	74HCT74, D Flip-Flop	U301
310-4393	74HCT393, Dual Binary	U302
	Divider
310-4374	74HCT374, Octal Latch	U303, U304
310-0054	4053B, Triple 2-CH	U305, U306
	CMOS SWITCH
Miscellaneous
620-6110	Right Angle "L" Brackets for Mounting add-on pcb.
	Same as bracket for tuning indicator pcb.
620-6110	10-conductor Ribbon Jumper.
	Same as ribbon jumper used on the tuning indicator
	board except 20 conductors.

862-1278-3 PCB, GRAYSCALE BOARD, APPOX. 1" X 5.312"

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Epson MFJ-1278B manual Descrpition Component ID Capacitor Monolithic Ceramic, Capacitor Electrolytic, IC Sockets, ICs

Contents

Table of Contents FSK Connection Getting Started Connect Advanced Packet Operation Navtex OperationFAX Operation Slow Scan Television Operation 125 HF Tuning Indicator MFJ-1278B SpecificationsMULTI-LEVEL Interface CONNECTOR,J13 External Modem Interface Connector J14 MFJ-1278B/1278BT Parts List CW Modem TUNE-UP ProcedureBPS Packet Setup Command Summary MFJ-1278B MULTI-MODE Table of Contents MFJ-1278B MULTI-MODE Introduction MFJ-1278B MULTI-MODE Introduction MFJ-48BE Items supplied with MFJ-1278B/MFJ-1278BT package MFJ Starter Packs MFJ-1278B MULTI-MODE Computer Interfacing Manufacturer Model Serial Port SignalsPin Signal Name Description Serial port signals required by MFJ-1278B Hsko Hski Computer with Specific Serial InterfacesApple Macintosh Macintosh MFJ-1278B Pin DB-25P DB-9P IBM PCjr Commodore C64, C128 and VIC-20 Color Computer DB-25P Radio Shack Color ComputerColor Computers IBM PC/XT/AT/386/486 and compatibles Computer MFJ-1278B RS-232C Computer RS-232C Other Computers with Nonstandard Serial Ports MacTerm Parameters for MFJ-1278B Apple II, II+, IIe, IIcCompatibility Terminal IBM and Compatible Computers RS-232C Pin Designations MFJ-1278B Serial Port PIN FunctionsRadio Shack Model 100/102 and NEC Pin # Mnemonic Name Autobaud Computer Baud Rate Changing Terminal Baud Rate MFJ ENTERPRISES, INC. Model MFJ-1278B BbRAMLOAD with Defaults a MFJ-1278B DB-25 Name Printer Port Pin # Printer Port Connection Type Printtes CR Printer ConsiderationPrinter Port Test MFJ-1278B Radio Ports MFJ-1278B MULTI-MODE Radio Interfacing Radio Connector Pin Diagram HT Special Keying Circuit Calibra Transmit Audio Level Adjustment for Method I InterfaceMethod 1 Direct Connection to Microphone and Speaker Setting the Receiver Audio Input Level Accessory Jack Interface Method 2 Accessory Jack or Interface Box Connection External Interface Box Transmit Audio Level Adjustment for Interface Method Important Note Harmonics Interference Receiver Audio SettingPage Key Paddle Connection MFJ-1278B MULTI-MODE Radio Interfacing CW InstallationKeying Connection FSK Cable MFJ-1278B MULTI-MODE Radio Interfacing FSK Connection First Steps Basic CommandsMFJ-1278B MULTI-MODE Basic Operation Getting Started Mycall was Nocall cmd Serial Port ConfigurationMFJ-1278B MULTI-MODE Basic Operation Mycall K5FLU Parity 1 or Parity Parity and Word LengthEchos New Lines and Line Wrapping LOW Tone Hz High Tone Hz Shift Hz Modem Operation ModesAMTOR, Navtex VHF RTTY, VHF Ascii Modem Verifying Operation Status Mode Switching With the Mode CommandMFJ-1278B MULTI-MODE Basic Operation Operational Modes Memory Buffers Radio Port Switching BUF1 The QTH here is Starkville, Mississippi. Enter Loading the Memory BuffersTransmitting the Memory Buffers Buffer Serial Numbering Buftime to Memory Repeat and Buffer Repeat TimeChaining the Memory Buffers Buftime 15 Enter MFJ-1278B MULTI-MODE Basic Operation Tuning Indicator Cmd Fulldup on Cmd Connect K5FLU Connecting and Disconnecting ExerciseMFJ-1278B MULTI-MODE Basic Operation Packet Operation VHF Packet Disconnected Cmd Disconne Cmd Connect N2WX VIA NK6K, KV7D DigipeatingAD7I Cmd Connect N2WX VIA AD7I Disconnected Unsuccessful ConnectionsMonitoring Channel Activity Retry count exceeded AD7I WA7GXD N2WX NK6K KV7B WB6YMHWD0ETZ,KV7BMheard Enter Connected to WB0QRP Your First Packet QSOStarting the QSO Cmd Connect WB0QRP Cmd Connect WB0QRP VIA K5FLU CTRL-CCmd Connect K5FLU VIA WB0QRP Cmd Monitor on Cmd Mcon on Cmd Convers Cmd Command 5 was $03Monitoring on the Air Special Input Characters Redispla Cmd Hi, John, how are you?CTRL-X\Hi, John, how are you? CanlinePage HF Packet Operation Hints Pactor What is Pactor?MFJ-1278B MULTI-MODE Basic Operation Pactor Pactor Operation Mycall n Enter Mode PT EnterFEC Unproto operation MFJ Pactor $2c-1022 free pcmd Monitoring Changeover Monitoring Amtor ARQ requests Exiting Pactor ModeThreshold Control Setting Txdelay TXD Digital Memory ARQ Pactor Feature Definitions SPEEDup/SPEEDdown Connect STA CON Pactor Status IndicatorsStatus Indicator Amtor Detection in Pactor Memory Size # of Slots Bytes Avail Setting Up your Pactor MailboxMFJ-1278B MULTI-MODE Basic Operation Pactor Mailbox Mailbox on Enter MFJ Pactor $2c-1022 free Mailbox Ready Free de callsign Help, K, L, R, S General OverviewSysop Enter MFJ-1278B MULTI-MODE Basic Operation Nn free de callsignHelp, K, L, R, S Slot## t m To From Subject SP call Detailed Pactor Mailbox Overview Send msg Control-Z or /EX on it own line ends Enter Subject Max Characters Enter ## EnterMessage ## deleted Nn free n Mailbox Help,K, L, R, S ## Enter Nn free n Mailbox Help, K, L, R, S ?EH Mailbox MessagesPactor Enter MFJ-1278B MULTI-MODE Basic Operation CW Operation Procedure Enter Receiving CW MSPeed 15 Enter Mode CW,15 EnterTransmitting CW Transmitting from Memory Buffers CW WeightingWeight ### Enter Randomcw OFF Enter Tuning your RadioRandom Code Generator CONTROL-C Ctrl-T Setting Up the for Code PracticeRandomcw on Enter Ctrl-R Mspeed 15 Enter Sending CW with External Key Paddle MFJ-1278B MULTI-MODE Basic Operation Modulated CW Operation Mode MC EnterRadio Terminal Mode Modulated CW Cmd VHF Rtty Setting Up for Ascii and Rtty OperationMode ## Enter Bad? Mode VB,110 EnterRtty and Ascii Receiving Rtty and Ascii Transmitting Baudot Rtty Operation Hints Mode HB,75 CTRL-T Commercial Rtty Reception OK Enter WtgCDSpeedConfidence Factor.SpeedData BitsRXInvert On/Off Baud, 90% Confidence baud used 7 bits, RXInvert Off OK Amtor Enter Mars Operation Configuring for MarsCommand Mars Setting Mode HB,75 Enter Operating Mars with MultiCom for IBM MARsmode Command Marsmode 3- Storage Mode Marsmode 1- QSO Mode MFJ-1278B MULTI-MODE Basic Operation Amtor Operation Mode a ARQSetting up for Mode a Operations Mode AM Enter =Q 2=W 3=E 4=R 5=T 6=Y 7=U 8=I 9=O 0=P Operating Mode aN2WX becomes Nwwx using zone Mode B FEC Operations Monitoring Mode A, ARQMode B FEC Setting up for Mode B FEC Amtor Status LED Indicators ARQ xxxx Enter Myselcal xxxx Enter Print on Enter Summary of Amtor Contact Sequence Station QTH Station ID Broadcast Time UTC MFJ-1278B MULTI-MODE Basic Operation Navtex OperationNavtex Stations and Frequencies Navtex Operation Navtex on Enter Navtex OFF Enter LORAN-COmega Systems Satnav Systems MFJ-1278B MULTI-MODE Basic Operation FAX Operation Faxmode n Enter FAXMODEn Lines per Type of Service Minute SecondFAX Formats Locations FAX InstallationFAX Frequency Printer Connection Receiving FAX to the Printer Mode FX EnterReceiving FAX MFJ-1278B MULTI-MODE Basic Operation LF, CR, ESC x x, ESC x x x, nnn character of graphics Display FAX Picture on Computer Screen & Save it to DiskTwo Level FAX Picture Format Multifax on Enter Multi-level FAX Picture Raw Data Format 000 001 110 111 White Lightest grey Darkest grey Black Transmitting FAXTwo Level FAX Transmitting Multi-level FAX Transmitting MFJ-1278B MULTI-MODE Basic Operation FAX/SSTV Transmit Tones Hz Creating FAX Pictures for TransmittingPixtones Values HEXPage TVMODEn Formats Sstv InstallationSstv Formats Printer Connection Tvmode n Enter Mode TV EnterReceiving Sstv Pictures Sstv Printing to the Printer MFJ-1278B MULTI-MODE Basic Operation $ss,$aa,$bb,$cc,$dd,$ee,$ff,$gg,$hh,$ii,$jj,$kk,$ll,$mm,$nn Printing Sstv Pictures to the Screen Transmitting Sstv Pictures Saving Sstv Pictures to DiskTerminating Sstv Printing Creating Sstv Pictures for Transmitting MFJ-1278B MULTI-MODE Basic Operation Special Characters Dec Hex Control Mnemonic Command ModeMFJ-1278B MULTI-MODE Advanced Operation Packet Operating Modes Entering Data-Transfer Modes Connected to callsign Converse Mode Transparent Mode Flow Control XON/XOFF Flow Control Station Identification Detailed VHF Packet OperationHardware Flow Control Type-in Flow Control W3IWI-3IDW3IWI/R Automatic Operations Cmd Beacon Every Unattended OperationsPacket Formatting Cmd Unproto QST VIA NK6K Commands Affecting ProtocolPacket Timing Functions Transmit Timing Retry interval = Frack * 2*n + Keyup delay = Txdelay + Axdelay * 10 in millisecondsKeyup delay = TXDELAY*10 in milliseconds Packet Timing Wait time = Dwait Wait time = Dwait * 10 + r * TxdelayRadio Baud Rate Monitor Functions Special Protocol Timing WB9FLWN7CL C KV7BN2WX D Real-Time Clock and Time Stamping Users Setting the MFJ-1278B to Normal OperationHow do I Invoke Multi-Connect? Conperm Easy-Mail Mailbox Sysop CR Setting Up your Easy-Mail MailboxUsers 1 CR Mailbox on CR Your MFJ-1278B will respond with Slot1 PN ToKB5JNZ FromKF5C BBS Bulletin Nn free 0 Mailbox B, E, Help, J, K, L, M, R, S, T Nn free n Mailbox B,E,Help,J,K,L,M,R,S,TMemory Size Number of Banks Paging Sysop any key aborts No answer Paging Sysop any key aborts Title Mailbox Operation Cannot, not yours Send msg Control-Z or /EX to end Slot## t m To From Subject ## CR Connect requestCALLSIGN Additional Mailbox FeaturesForwarding Callsign Busy Disconnected Sysop Chat ModeEliciting Reverse Forwards Remote Heard Log Mailbox Messages Idle TimeoutMailbox CText Abort None found You have new mail?Mailbox full Not found Description Slotting and Acknowledgment Priority MFJ-1278B MULTI-MODE Advanced Operation Ackprior Onoff New Parameters Remarks Slots n Baud Rate Frack Seconds Other Related Parameters ACKTime Initial Parameter Settings SummaryWhat to Expect Frack MFJ-1278B MULTI-MODE Advanced Operation Packet Picture transfer to the computer screen Using PktpixPacket Picture Transfer Printing Packet Pictures thru Built-in Printer Port Radio Setup for HF Packet Operation MFJ-1278B MULTI-MODE Advanced Operation MFJ-1278B MULTI-MODE Advanced Operation Operating HF Packet MFJ-1278B MULTI-MODE Advanced Operation MFJ-1278B MULTI-MODE Advanced Operation Yourcall Hiscall Yourcall CQ MFJ-1278B MULTI-MODE Advanced Operation Maxframe DigipeatDwait OFF Check OFF Cmsg Retry Kiss Interface for TCP/IP MFJ-1278B Kiss MODE, TNC-2 MODE, Host Mode Param ax0 Command Function Comments Xflow OFF MFJ-1278B MULTI-MODE Operational Commands Command PrefaceEntering Commands Cmd Asdfasdf MFJ-1278B MULTI-MODE Operational CommandsCommand List Defaults Beacon EVERY/AFTER n Parameters Conok on RemarksCmd Conok Y 8LEVELS ON/OFF Mode Packet Default OFFMode FAX/SSTV Default OFF 8BITCONV ON/OFF Aalt ON/OFF Mode FAX/SSTV DefaultONMode Amtor Default OFF 16LEVELS ON/OFF Ackpriority ON/OFF Mode Packet Default onAcktime nnnn Mode Packet Default Alockchar nn Mode CW/MCW Default $15 Ansbstr cccc Mode Amtor Default blank Altcall ssss Mode Amtor Default blank Cmd Unproto Qracr Arcvchar nn Mode RTTY/ASCII Default $12Answrqra ON/OFF Speed Confidence Factor. Data Bit RXInvert On/Off Asendcha nn Mode RTTY/ASCII Default $14ASA Aspect n Mode FAX Default Autobaud ON/OFF Mode All Default on Autolf ON/OFF AUtolf ON/OFF Mode Pactor Default on Autotrac ON/OFF Awlen n Mode All Default Axhang Axdelay nAX25L2V2 ON/OFF Bbsmsgs ON/OFF Message Effect When Bbsmsgs onAxhang n Beacon Everyafter n Mode Packet Default Every Bkondel on Bkondel ON/OFF Awlen BLP ON/OFFConmode TRANS/CONV Parity Budlist ON/OFF Btext textMailbox on line. Messages for WB9FLW, AD7I, K9NG Buftime n BUF nBufkey nnn Space Bwnl ON/OFFCalira Canline n Calset n Canpac n Cancel Display Output BELL*** Connected to callsign CBell ON/OFF Mode Pactor DefaultOFFCbell ON/OFF OFF Chat Mode Rtty Default onCcitt ON/OFF Change CHECKV1 ON/OFF CHObell ON/OFF Mode Pactor Default onCheck n CMDchr nnn 0=nn=255 Mode Pactor Default $03 Connect callsign Cmdtime nTNC Conperm ON/OFF Cmsgdisc ON/OFF Cmsg ON/OFF Command n Trans Conmode CONVERS/TRANSConvers Connect WA7GXD VIA N0ADI-1,WD0ETZ Call2 Call station busy Conok ON/OFFConnect request call Converse Constamp ON/OFFConnected to N2WX 05/28/85 CR ON/OFF Cpactime ON/OFF Cstatus Ctext textText Im not here right now, but you may leave a message CWidmode nn 0=nn=255 Mode Pactor Default Cwcall ssss Mode Amtor Default blank Cwspeedm ON/OFF Cwsendch nnn Mode CW Default$FFMode CW Default OFF Cmd Daytime 02/29/84 Daytime date&timeYymmddhhmm Cmd Daytime Dayusa ON/OFF Deadtime nnn Delay nn Diddle ON/OFF Mode ASCII/RTTY Default onDelete ON/OFF Disconne Digipeat ON/OFF Asyrxovr Display classAsyfrerr Asyqover Hundrerr BbfailedDigisent Hovrerr Sentfrmr RxerrorsRxlenerr Rxresync Dwait n EAa ON/OFF Mode Pactor Default onDisplay Echo ON/OFF Mode CW/RTTY/ASCII Default OFFEAS ON/OFF Easin ON/OFF Epson ON/OFF ECho ON/OFF Mode Pactor Default on ParameterERrstrin cccc Mode Pactor Default Mode Amtor Default on Escape ON/OFF Mode Packet Default OFF ParametersEXActcal ON/OFF Mode Pactor DefaultON Faxeop ON/OFF Farnswor ON/OFF FEC Mode FAX Default OFFFaxneg ON/OFF Faxrev ON/OFF Forward FLow ON/OFF Mode Pactor Default onFlow ON/OFF Fulldup ON/OFF N2WXKV7D Graphlf OnoffHeaderln ON/OFF KV7DN2WX Go ahead and transfer the file HID ON/OFF Healled ON/OFF IDTime nnn Kiss ON/OFF Mode Mailbox Default OFFKilonfwd ON/OFF Lcok Onoff Lc callsignLcalls call1,call2...,call8 LFadd ON/OFF Mode Pactor Default OFF LEdmode 0/1 Mode Pactor Default Lfignore ON/OFF Mode ASCII/Packet Default OFFLfadd Onoff Lfaddalt ON/OFF Listen Mode Amtor Immediate CommandMAILbox ON/OFF Mode Pactor Default OFF Mailbox ON/OFF Mall ON/OFF Mailled ON/OFF Bell Null Marsmode nTX Translations @ Bell \ Null Figs Ltrs Match ON/OFF MAXDown nnn Mode Pactor DefaultMaxframe n Mode Packet Default Mbegin cccc Mode Amtor Default MAXSum nn Mode Pactor DefaultMAXUp nnn Mode Pactor Default Mcon ON/OFF Mcom ON/OFF Mctext text Mend cccc Mode Amtor Default nnnnMfilter n1,n2,n3,n4 Mode Packet Default none MNONAX25 ON/OFF MhclearMheard Mode N2WXW5FD-3 Im ready to transfer the file now Monitor ON/OFF Mode Pactor Default onMonitor ON/OFF Mspeed n Mrpt ON/OFFWB9FLWAD7I,K9NG*,N2WX-7Hi Paul WB9FLWAD7IHi Paul Mstamp ON/OFF Mtimeout n Mycall call-n Multifax ON/OFF Myalias call-n Mode Packet Default blank MYcall callsign Mode Pactor Default Mfjpactr Myselcal ssss Myhierad Text Mode Mailbox DefaultMymcall callsign Navtex ON/OFF Mode Navtex DefaultOFFNavstn Text Mode Navtex Default ALL Newmode ON/OFF NavmsgLORAN-C NO200 ON/OFF Mode Pactor Default OFFNodeforw node Mode Mailbox Default Nucr ON/OFF Nodepath text string Mode Mailbox DefaultCmd Nodepath C KB4VOL Cmd Nodeforw PSL5 Nomode ON/OFF Nulls n Omlc ON/OFF Paclen n Mode Packet DefaultPactime Everyafter n Mode Packet Default After CTRL-V CTRL-C Pass n Mode Packet Default $16 Passall ON/OFF Syn Pixtones nWhite Lt gray Dark gray Black Area TransmitTones Hz Pixtones Values HEXFAX/SSTV Pktpix ON/OFF Mode Packet Immediate CommandEntering transparent mode for packet-pix reception Printtes Printgra ON/OFFPrinter ON/OFF PTSend PTOver nnn 0=nn=255 Mode Pactor Default $19 Randomcw ON/OFF QRTRadio n Reconnect call1 VIA call2,call3...,call9 Mode Packet Rbitmask $xx Mode RTTY/ASCII Default Redispla n Remsysop call-n Mode Mailbox Default Blank Restart ResetResptime n Mode Packet Default Restore Retry n RETries nnn 0=nn=255 Mode Pactor DefaultRevflim call-n Mode Mailbox Default Rinv ON/OFF RFE ON/OFF Data Rxblock ON/OFF$FF PID Rxbr n TVBreak Values Rxbright n Rxcal Calset Adjustment & Location Map Rxinvert ON/OFF Rvfalway ON/OFF Serialno n Mode CW Default Sfnl ON/OFF SetupModem Default Baud Rate Speed/ Format Sstv Solf ON/OFF Slots nnn Mode Packet Default Status Srxall ON/OFFStart n STatus Stop n Streamca ON/OFF Streamsw n Streamdb OnoffThis is a test String- max 119 chars Timedcmd text string Mode Mailbox DefaultTimedmin n Mode Mailbox Default Mailbox KV7BCQ,KF7B*this is a test message TRace ON/OFF Mode Pactor Default OFFTrace ON/OFF Trflow ON/OFF ModePacket Default OFF Tuneproc Tries n Mode Packet Default NoneTune Tvhsync ON/OFF Tvbreaks n Mode Sstv Default see belowMode Sstv Default OFF Tvmode n Mode Sstv Immediate Command TVX ON/OFF Txdelay n Mode Packet Default Baud Rate Time-per-character TXDelay n Mode Pactor Default 2 60msTxdelayc nnn Txdelayc = Radio-PTT-delay-time / Time-per-character Txdiddle ON/OFF Txinvert ON/OFF Txtmo n Mode Packet DefaultTxflow ON/OFF U2 UNproto Txuiframe ON/OFFU1 UNproto Unshift ON/OFF URepeats nn Mode Pactor DefaultUsers n Mode Packet Default Defaults Nibble Tone Visticks nnnn Mode Sstv Default0 WRU WAitdisc nn Mode Pactor DefaultWeight n Mode CW Default Wdmode ON/OFF Xmitok ON/OFF Xoff n Mode All Default $13 XON n XOff nnXOn nn Was BbRAM loaded with defaultsPacket Messages Message saved MFJ-1278B MULTI-MODE System MessagesToo many packets outstanding ? Expected bank n....x ?clock not set Command Mode Error Messages?bad ?call ?VIA Link Status Messages Frmr frame just sent Frmr sent Connected to call1 VIA call2,call3...,call9Connect requestcall1 VIA call2,call3...,call9 Callsign busy LINKOUTOFORDER, possible datalossopt.daytime stamp Frmr rcvd MFJ-1278B MULTI-MODE Hardware MFJ-1278B Specifications Protocol Power RequiredGeneral Description BbRAM Dividers and Baud-rate Generator Detailed Circuit DescriptionOscillator Serial Interface CPU Complex Modem Watch-dog TimerPower Supply RS-232C Handshaking Protocol MFJ-1278B MULTI-MODE Hardware Jumper # Position Function MFJ-1278B MULTI-MODE Hardware Jumper Functions JMP19 JMP16JMP17 JMP18 Jmpe JmpbJmpc Jmpd Printer Port Pin # Pin Function Parallel Printer Port PIN FUNCTION,J12 J5 Pin # Pin Function J13 Pin # Pin Function External Modem Interface Connector J14 Pin 3 SIO Special Interrupt Input MFJ-1278B MULTI-MODE Hardware Modem Disconnect HEADER, J4Pin 1 Carrier Detect Input Pin 2 Carrier Detect Output Pin 8 Unacknowledged Packets Pending Status Output Pin 5 SIO RTS OutputPin 6 Transmitter Key Input Pin 7 Connect Status Output HF Tuning Indicator General Tests MFJ-1278B MULTI-MODE Troubleshooting Assembly Problems Obvious Problems Oscillator and Reset Circuits Specific SymptomsCabling Problems Symptom TNC appears dead Symptom Modem wont calibrate or key transmitter Symptom MFJ-1278B wont sign on to the terminal Terminal Interface TroubleshootingSymptom Uncopyable transmitted or received packets Symptom The MFJ-1278B signs on OK but wont accept commands Data Link Layer Physical Layer Hdlc Frames MFJ-1278B MULTI-MODE Packet Radio Protocol AX.25 Level TWO Code Abbrv Frame Type Disc RNRREJ SabmPage Channel Flow Control Table A-1HOOKUP for Specific Radios MFJ-1278B MULTI-MODE Appendix a Radio Hookup Table A-1.2Other Radio Connections Test equipment needed MFJ-1278B MULTI-MODE Appendix B Modem CalibrationMODULATOR/DEMODULATOR Frequency Calibration Calibration Method Multilevel xmit...1900 R79 Multilevel demod 307 154KHz 1550 Hz 1062250 Hz 70 Demodulator Alignment Calibration Procedure = INT 525000 / Flow + Comprehensive Alignment ProcedureSet Modulator Tones Using Built-in Calibration Software = INT 525000 / Fhigh + Demodulator Center Frequency Alignment Alignment Procedure Tuning Indicator Alignment MFJ-1278B MULTI-MODE Appendix B Modem Calibration MFJ-1278B Adjustment Location Map Calset # Calset Values for Various Modulator Tone FrequenciesPage Detailed CW Demodulator Alignment Procedure MFJ-1278B MULTI-MODE Appendix B Modem Calibration MFJ-1278B MULTI-MODE Appendix B Modem Calibration Cali CR Audio Output Level Adjustment Procedure Radio 2 CR MFJ-1278B MULTI-MODE Appendix C Audio Output First Method Noise Average Frequency MFJ-1278B MULTI-MODE Appendix D HF Radio HF Radio Alignment Fc = Flow+Fhigh/2 Page MFJ-1278B MULTI-MODE Appendix E Converting to TNC-2 Mode VP,2400 CR BPS Packet Setup CN-6 Jumper Position Transmit Audio Range no load BPS Receive Audio SettingBPS Transmit Audio Setting MFJ-1278B MULTI-MODE Appendix F 2400 BPS Packet JMP14 JMP13 Jmpa MFJ-1278B MULTI-MODE Appendix G Jumper Functions Jmpz Fig. G-1 Jumper Connector Location Acktime MFJ-1278B MULTI-MODE Appendix H Command Summary BLP Conperm Deadtime FEC Lfignore Mrpt Pactime Retry Timedmin Users RESISTORS, 1/4 WATT, 5% MFJ P/NDescrpition Component ID RESISTORS, 1/8 WATT, 1% MFJ-1278B MULTI-MODE Appendix I Parts List Capacitors MULTI-LAYER, Monolithic Ceramic TRIMPOTS, Bourns or EqualTrim POT Single TURN, Miniature POT 17MM Single TURN, PCB Mount Capacitors Electrolytic Capacitors MYLAR, 50V/100V ICS Capacitor Other TypesIC Sockets LOW Profile Do not use 74HCT14 for these ICs Transistors DIODES/LEDS Voltage Regulator Connectors Miscellaneous Mounting NUT for R131 For Installing CoverDisplay PC Board Assembly Grayscale PC Board Assembly Addition Parts for MFJ-1278BT only BOM for Display PC Assembly P/NThis is to Insure Good Contact with Chassis Reduce EMI Trimpot 15 Turns, Bourns or Equal BOM for Grayscale PC Assembly P/NResistors 1/8W, 1% ICs Descrpition Component ID Capacitor Monolithic CeramicCapacitor Electrolytic IC Sockets RESISTOR, 1/4 WATT, 5% Capacitors Disc Ceramic RESISTOR, 1/8 WATT, 1%RESISTOR, NETWORK, SINGLE-ON-LINE, Isolated RESISTOR, Trim POT, Single TURN, MINIATURE, Horzontal Diodes POS. Shorting Jumer for CN6 CENTER, TOP ENTRY,10 POS CN1 Dual ROW Socket ConnectorCENTER, Right Angle JMP 14B POS. Header CENTER, 3 POS. Header MFJ-1278B MULTI-MODE Manual Index Manual Index Autotrac MFJ-1278B MULTI-MODE Manual Index MFJ-1278B MULTI-MODE Manual Index MFJ-1278B MULTI-MODE Manual Index MFJ-1278B MULTI-MODE Manual Index MFJ-1278B MULTI-MODE Manual Index MFJ-1278B MULTI-MODE Manual Index Connect Cwspeedm CW KEY-IN MFJ-1278B MULTI-MODE Manual Index FARnswor, 73, 75 Farnsworth CW, 75 FCS\, Hdlc field Introduction MFJ-1278B MULTI-MODE Manual Index Normal CW MFJ-1278B MULTI-MODE Manual Index MFJ-1278B MULTI-MODE Manual Index MFJ-1278B MULTI-MODE Manual Index Txdelay

Epson MFJ-1278B Descrpition Component ID Capacitor Monolithic Ceramic, Capacitor Electrolytic

Models: MFJ-1278B

MFJ-1278B MULTI-MODE

MFJ P/N

Descrpition

Component ID

Capacitor: Monolithic Ceramic

Capacitor: Electrolytic

IC Sockets

IC's

Miscellaneous