Table of Contents
FSK Connection Getting Started
Connect
Advanced Packet Operation
Navtex Operation
FAX Operation
Slow Scan Television Operation
125
HF Tuning Indicator
MFJ-1278B Specifications
MULTI-LEVEL Interface CONNECTOR,J13
External Modem Interface Connector J14
MFJ-1278B/1278BT Parts List
CW Modem TUNE-UP Procedure
BPS 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 Signals
Pin Signal Name Description
Serial port signals required by MFJ-1278B
Hsko Hski
Computer with Specific Serial Interfaces
Apple Macintosh
Macintosh MFJ-1278B Pin DB-25P DB-9P
IBM PCjr
Commodore C64, C128 and VIC-20
Color Computer DB-25P
Radio Shack Color Computer
Color Computers
IBM PC/XT/AT/386/486 and compatibles Computer
MFJ-1278B RS-232C Computer RS-232C
Other Computers with Nonstandard Serial Ports
Apple II, II+, IIe, IIc
Compatibility Terminal
MacTerm Parameters for MFJ-1278B
IBM and Compatible Computers
RS-232C Pin Designations
MFJ-1278B Serial Port PIN Functions
Radio 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
Printer Consideration
Printer Port Test
Type Printtes CR
MFJ-1278B Radio Ports
MFJ-1278B MULTI-MODE Radio Interfacing
Radio Connector Pin Diagram
HT Special Keying Circuit
Transmit Audio Level Adjustment for Method I Interface
Method 1 Direct Connection to Microphone and Speaker
Calibra
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 Setting
Page
MFJ-1278B MULTI-MODE Radio Interfacing CW Installation
Keying Connection
Key Paddle Connection
FSK Cable
MFJ-1278B MULTI-MODE Radio Interfacing FSK Connection
Basic Commands
MFJ-1278B MULTI-MODE Basic Operation Getting Started
First Steps
Mycall was Nocall cmd
Serial Port Configuration
MFJ-1278B MULTI-MODE Basic Operation
Mycall K5FLU
Parity and Word Length
Echos
Parity 1 or Parity
New Lines and Line Wrapping
LOW Tone Hz High Tone Hz Shift Hz
Modem Operation Modes
AMTOR, Navtex VHF RTTY, VHF Ascii
Modem
Mode Switching With the Mode Command
MFJ-1278B MULTI-MODE Basic Operation Operational Modes
Verifying Operation Status
Memory Buffers
Radio Port Switching
BUF1 The QTH here is Starkville, Mississippi. Enter
Loading the Memory Buffers
Transmitting the Memory Buffers
Buffer Serial Numbering
Buftime to
Memory Repeat and Buffer Repeat Time
Chaining the Memory Buffers
Buftime 15 Enter
MFJ-1278B MULTI-MODE Basic Operation Tuning Indicator
Cmd Fulldup on Cmd Connect K5FLU
Connecting and Disconnecting Exercise
MFJ-1278B MULTI-MODE Basic Operation Packet Operation
VHF Packet
Disconnected
Cmd Disconne
Cmd Connect N2WX VIA NK6K, KV7D
Digipeating
AD7I
Cmd Connect N2WX VIA AD7I
Disconnected
Unsuccessful Connections
Monitoring Channel Activity
Retry count exceeded
WB6YMHWD0ETZ,KV7B
Mheard Enter
AD7I WA7GXD N2WX NK6K KV7B
Connected to WB0QRP
Your First Packet QSO
Starting the QSO
Cmd Connect WB0QRP
CTRL-C
Cmd Connect K5FLU VIA WB0QRP
Cmd Connect WB0QRP VIA K5FLU
Cmd Monitor on Cmd Mcon on Cmd Convers
Cmd Command 5 was $03
Monitoring on the Air
Special Input Characters
Redispla
Cmd Hi, John, how are you?CTRL-X\
Hi, John, how are you?
Canline
Page
HF Packet Operation Hints
Pactor
What is Pactor?
MFJ-1278B MULTI-MODE Basic Operation Pactor
Pactor Operation
Mycall n Enter
Mode PT Enter
FEC Unproto operation
MFJ Pactor $2c-1022 free pcmd
Monitoring
Changeover
Monitoring Amtor ARQ requests
Exiting Pactor Mode
Threshold Control Setting
Txdelay TXD
Digital Memory ARQ
Pactor Feature Definitions
SPEEDup/SPEEDdown
Connect
STA CON
Pactor Status Indicators
Status Indicator
Amtor Detection in Pactor
Setting Up your Pactor Mailbox
MFJ-1278B MULTI-MODE Basic Operation Pactor Mailbox
Memory Size # of Slots Bytes Avail
Mailbox on Enter
MFJ Pactor $2c-1022 free
General Overview
Sysop Enter
Mailbox Ready Free de callsign Help, K, L, R, S
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
Message ## deleted Nn free n Mailbox Help,K, L, R, S
Enter
## Enter
Nn free n Mailbox Help, K, L, R, S
Mailbox Messages
Pactor Enter
?EH
MFJ-1278B MULTI-MODE Basic Operation CW Operation
Procedure
Enter
Receiving CW
Mode CW,15 Enter
Transmitting CW
MSPeed 15 Enter
CW Weighting
Weight ### Enter
Transmitting from Memory Buffers
Randomcw OFF Enter
Tuning your Radio
Random Code Generator
CONTROL-C
Ctrl-T
Setting Up the for Code Practice
Randomcw on Enter
Ctrl-R
Mspeed 15 Enter
Sending CW with External Key Paddle
Mode MC Enter
Radio Terminal Mode Modulated CW Cmd
MFJ-1278B MULTI-MODE Basic Operation Modulated CW Operation
Setting Up for Ascii and Rtty Operation
Mode ## Enter
VHF Rtty
Bad?
Mode VB,110 Enter
Rtty and Ascii Receiving
Rtty and Ascii Transmitting
Baudot Rtty Operation Hints
Mode HB,75
CTRL-T
Commercial Rtty Reception
OK Enter
WtgCD
SpeedConfidence Factor.SpeedData BitsRXInvert On/Off
Baud, 90% Confidence baud used 7 bits, RXInvert Off
OK Amtor Enter
Mars Operation
Configuring for Mars
Command 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 ARQ
Setting up for Mode a Operations
Mode AM Enter
Operating Mode a
N2WX becomes Nwwx using zone
=Q 2=W 3=E 4=R 5=T 6=Y 7=U 8=I 9=O 0=P
Mode B FEC Operations
Monitoring Mode A, ARQ
Mode 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 Operation
Navtex Stations and Frequencies
Navtex Operation
Navtex on Enter
LORAN-C
Omega Systems Satnav Systems
Navtex OFF Enter
MFJ-1278B MULTI-MODE Basic Operation FAX Operation
FAXMODEn Lines per Type of Service Minute Second
FAX Formats
Faxmode n Enter
Locations
FAX Installation
FAX Frequency
Printer Connection
Mode FX Enter
Receiving FAX
Receiving FAX to the Printer
MFJ-1278B MULTI-MODE Basic Operation
Display FAX Picture on Computer Screen & Save it to Disk
Two Level FAX Picture Format
LF, CR, ESC x x, ESC x x x, nnn character of graphics
Multifax on Enter
Multi-level FAX Picture Raw Data Format
Transmitting FAX
Two Level FAX Transmitting
000 001 110 111 White Lightest grey Darkest grey Black
Multi-level FAX Transmitting
MFJ-1278B MULTI-MODE Basic Operation
FAX/SSTV Transmit Tones Hz
Creating FAX Pictures for Transmitting
Pixtones
Values HEX
Page
TVMODEn Formats
Sstv Installation
Sstv Formats
Printer Connection
Tvmode n Enter
Mode TV Enter
Receiving 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
Saving Sstv Pictures to Disk
Terminating Sstv Printing
Transmitting Sstv Pictures
Creating Sstv Pictures for Transmitting
MFJ-1278B MULTI-MODE Basic Operation
Special Characters
Dec Hex Control Mnemonic
Command Mode
MFJ-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 Operation
Hardware Flow Control
Type-in Flow Control
W3IWI-3IDW3IWI/R
Automatic Operations
Unattended Operations
Packet Formatting
Cmd Beacon Every
Cmd Unproto QST VIA NK6K
Commands Affecting Protocol
Packet Timing Functions
Transmit Timing
Retry interval = Frack * 2*n +
Keyup delay = Txdelay + Axdelay * 10 in milliseconds
Keyup delay = TXDELAY*10 in milliseconds
Packet Timing
Wait time = Dwait * 10 + r * Txdelay
Radio Baud Rate
Wait time = Dwait
Monitor Functions
Special Protocol Timing
WB9FLWN7CL C KV7BN2WX D
Real-Time Clock and Time Stamping
Users
Setting the MFJ-1278B to Normal Operation
How do I Invoke Multi-Connect?
Conperm
Easy-Mail Mailbox
Sysop CR
Setting Up your Easy-Mail Mailbox
Users 1 CR
Mailbox on CR
Your MFJ-1278B will respond with
Slot1 PN ToKB5JNZ FromKF5C BBS Bulletin
Nn free n Mailbox B,E,Help,J,K,L,M,R,S,T
Memory Size Number of Banks
Nn free 0 Mailbox B, E, Help, J, K, L, M, R, S, T
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 Features
Forwarding
Callsign Busy Disconnected
Sysop
Chat Mode
Eliciting Reverse Forwards
Remote Heard Log
Mailbox Messages
Idle Timeout
Mailbox 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 Summary
What to Expect
Frack
MFJ-1278B MULTI-MODE Advanced Operation
Packet Picture transfer to the computer screen
Using Pktpix
Packet 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
Digipeat
Dwait OFF
Check OFF Cmsg Retry
Kiss Interface for TCP/IP
MFJ-1278B Kiss MODE, TNC-2 MODE, Host Mode
Param ax0
Command Function Comments
MFJ-1278B MULTI-MODE Operational Commands Command Preface
Entering Commands
Xflow OFF
Cmd Asdfasdf
MFJ-1278B MULTI-MODE Operational Commands
Command List
Defaults
Beacon EVERY/AFTER n
Parameters
Remarks
Cmd Conok Y
Conok on
8LEVELS ON/OFF
Mode Packet Default OFF
Mode FAX/SSTV Default OFF
8BITCONV ON/OFF
Aalt ON/OFF
Mode FAX/SSTV DefaultON
Mode Amtor Default OFF
16LEVELS ON/OFF
Ackpriority ON/OFF
Mode Packet Default on
Acktime nnnn Mode Packet Default
Alockchar nn Mode CW/MCW Default $15
Ansbstr cccc Mode Amtor Default blank
Altcall ssss Mode Amtor Default blank
Arcvchar nn Mode RTTY/ASCII Default $12
Answrqra ON/OFF
Cmd Unproto Qracr
Asendcha nn Mode RTTY/ASCII Default $14
ASA
Speed Confidence Factor. Data Bit RXInvert On/Off
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
Axdelay n
AX25L2V2 ON/OFF
Axhang
Message Effect When Bbsmsgs on
Axhang n
Bbsmsgs ON/OFF
Beacon Everyafter n Mode Packet Default Every
Bkondel on
Bkondel ON/OFF
Awlen
BLP ON/OFF
Conmode TRANS/CONV
Parity
Btext text
Mailbox on line. Messages for WB9FLW, AD7I, K9NG
Budlist ON/OFF
BUF n
Bufkey nnn
Buftime n
Bwnl ON/OFF
Calira
Space
Canline n
Calset n
Canpac n
Cancel Display Output
BELL*** Connected to callsign
CBell ON/OFF Mode Pactor DefaultOFF
Cbell ON/OFF
OFF
Chat
Mode Rtty Default on
Ccitt ON/OFF
Change
CHObell ON/OFF Mode Pactor Default on
Check n
CHECKV1 ON/OFF
CMDchr nnn 0=nn=255 Mode Pactor Default $03
Cmdtime n
TNC
Connect callsign
Conperm ON/OFF
Cmsgdisc ON/OFF
Cmsg ON/OFF
Command n
Conmode CONVERS/TRANS
Convers
Trans
Connect WA7GXD VIA N0ADI-1,WD0ETZ
Call2
Conok ON/OFF
Connect request call
Call station busy
Constamp ON/OFF
Connected to N2WX 05/28/85
Converse
CR ON/OFF
Cpactime ON/OFF
Cstatus
Ctext text
Text
Im not here right now, but you may leave a message
CWidmode nn 0=nn=255 Mode Pactor Default
Cwcall ssss Mode Amtor Default blank
Cwsendch nnn Mode CW Default$FF
Mode CW Default OFF
Cwspeedm ON/OFF
Cmd Daytime 02/29/84
Daytime date&time
Yymmddhhmm
Cmd Daytime
Dayusa ON/OFF
Deadtime nnn
Delay nn
Mode ASCII/RTTY Default on
Delete ON/OFF
Diddle ON/OFF
Disconne
Digipeat ON/OFF
Asyrxovr
Display class
Asyfrerr
Asyqover
Hundrerr
Bbfailed
Digisent
Hovrerr
Sentfrmr
Rxerrors
Rxlenerr
Rxresync
EAa ON/OFF Mode Pactor Default on
Display
Dwait n
Echo ON/OFF
Mode CW/RTTY/ASCII Default OFF
EAS ON/OFF
Easin ON/OFF
Epson ON/OFF
ECho ON/OFF Mode Pactor Default on Parameter
ERrstrin cccc Mode Pactor Default
Mode Amtor Default on
Mode Packet Default OFF Parameters
EXActcal ON/OFF Mode Pactor DefaultON
Escape ON/OFF
Faxeop ON/OFF
Farnswor ON/OFF
FEC
Mode FAX Default OFF
Faxneg ON/OFF
Faxrev ON/OFF
FLow ON/OFF Mode Pactor Default on
Flow ON/OFF
Forward
Fulldup ON/OFF
N2WXKV7D
Graphlf Onoff
Headerln ON/OFF
KV7DN2WX Go ahead and transfer the file
HID ON/OFF
Healled ON/OFF
IDTime nnn
Mode Mailbox Default OFF
Kilonfwd ON/OFF
Kiss ON/OFF
Lc callsign
Lcalls call1,call2...,call8
Lcok Onoff
LFadd ON/OFF Mode Pactor Default OFF
LEdmode 0/1 Mode Pactor Default
Lfignore ON/OFF
Mode ASCII/Packet Default OFF
Lfadd Onoff
Lfaddalt ON/OFF
Mode Amtor Immediate Command
MAILbox ON/OFF Mode Pactor Default OFF
Listen
Mailbox ON/OFF
Mall ON/OFF
Mailled ON/OFF
Bell Null
Marsmode n
TX Translations
@ Bell \ Null Figs Ltrs
MAXDown nnn Mode Pactor Default
Maxframe n Mode Packet Default
Match ON/OFF
MAXSum nn Mode Pactor Default
MAXUp nnn Mode Pactor Default
Mbegin cccc Mode Amtor Default
Mcon ON/OFF
Mcom ON/OFF
Mend cccc Mode Amtor Default nnnn
Mfilter n1,n2,n3,n4 Mode Packet Default none
Mctext text
MNONAX25 ON/OFF
Mhclear
Mheard
Mode
Monitor ON/OFF Mode Pactor Default on
Monitor ON/OFF
N2WXW5FD-3 Im ready to transfer the file now
Mspeed n
Mrpt ON/OFF
WB9FLWAD7I,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
Myhierad Text Mode Mailbox Default
Mymcall callsign
Myselcal ssss
Mode Navtex DefaultOFF
Navstn Text Mode Navtex Default ALL
Navtex ON/OFF
Navmsg
LORAN-C
Newmode ON/OFF
Mode Pactor Default OFF
Nodeforw node Mode Mailbox Default
NO200 ON/OFF
Nucr ON/OFF
Nodepath text string Mode Mailbox Default
Cmd Nodepath C KB4VOL Cmd Nodeforw PSL5
Nomode ON/OFF
Nulls n
Paclen n Mode Packet Default
Pactime Everyafter n Mode Packet Default After
Omlc ON/OFF
CTRL-V CTRL-C
Pass n Mode Packet Default $16
Passall ON/OFF
Pixtones n
White Lt gray Dark gray Black Area
Syn
Pixtones Values HEX
FAX/SSTV
TransmitTones Hz
Mode Packet Immediate Command
Entering transparent mode for packet-pix reception
Pktpix ON/OFF
Printgra ON/OFF
Printer ON/OFF
Printtes
PTSend
PTOver nnn 0=nn=255 Mode Pactor Default $19
QRT
Radio n
Randomcw ON/OFF
Reconnect call1 VIA call2,call3...,call9 Mode Packet
Rbitmask $xx Mode RTTY/ASCII Default
Redispla n
Remsysop call-n Mode Mailbox Default Blank
Restart
Reset
Resptime n Mode Packet Default
Restore
RETries nnn 0=nn=255 Mode Pactor Default
Revflim call-n Mode Mailbox Default
Retry n
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
Setup
Modem Default Baud Rate Speed/ Format
Sstv
Solf ON/OFF
Slots nnn Mode Packet Default
Status
Srxall ON/OFF
Start n
STatus
Stop n
Streamca ON/OFF
Streamdb Onoff
This is a test
Streamsw n
String- max 119 chars
Timedcmd text string Mode Mailbox Default
Timedmin n Mode Mailbox Default
Mailbox
TRace ON/OFF Mode Pactor Default OFF
Trace ON/OFF
KV7BCQ,KF7B*this is a test message
Trflow ON/OFF
ModePacket Default OFF
Tries n Mode Packet Default None
Tune
Tuneproc
Tvbreaks n Mode Sstv Default see below
Mode Sstv Default OFF
Tvhsync ON/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 60ms
Txdelayc nnn
Txdelayc = Radio-PTT-delay-time / Time-per-character
Txdiddle ON/OFF
Txtmo n Mode Packet Default
Txflow ON/OFF
Txinvert ON/OFF
Txuiframe ON/OFF
U1 UNproto
U2 UNproto
URepeats nn Mode Pactor Default
Users n Mode Packet Default
Unshift ON/OFF
Defaults Nibble Tone
Visticks nnnn Mode Sstv Default0
WRU
WAitdisc nn Mode Pactor Default
Weight n Mode CW Default
Wdmode ON/OFF
Xmitok ON/OFF
Xoff n Mode All Default $13
XOff nn
XOn nn
XON n
BbRAM loaded with defaults
Packet Messages
Was
Message saved
MFJ-1278B MULTI-MODE System Messages
Too 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...,call9
Connect requestcall1 VIA call2,call3...,call9
Callsign busy
LINKOUTOFORDER, possible datalossopt.daytime stamp
Frmr rcvd
MFJ-1278B MULTI-MODE Hardware
MFJ-1278B Specifications
Protocol
Power Required
General Description
BbRAM
Detailed Circuit Description
Oscillator
Dividers and Baud-rate Generator
Serial Interface
CPU Complex
Watch-dog Timer
Power Supply
Modem
RS-232C Handshaking Protocol
MFJ-1278B MULTI-MODE Hardware
Jumper # Position Function
MFJ-1278B MULTI-MODE Hardware Jumper Functions
JMP19
JMP16
JMP17
JMP18
Jmpe
Jmpb
Jmpc
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, J4
Pin 1 Carrier Detect Input
Pin 2 Carrier Detect Output
Pin 8 Unacknowledged Packets Pending Status Output
Pin 5 SIO RTS Output
Pin 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 Symptoms
Cabling Problems
Symptom TNC appears dead
Symptom Modem wont calibrate or key transmitter
Terminal Interface Troubleshooting
Symptom Uncopyable transmitted or received packets
Symptom MFJ-1278B wont sign on to the terminal
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
RNR
REJ
Sabm
Page
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 Calibration
MODULATOR/DEMODULATOR Frequency Calibration
Calibration Method
Multilevel xmit...1900
R79
Multilevel demod 307 154KHz 1550 Hz 106
2250 Hz 70
Demodulator Alignment
Calibration Procedure
Comprehensive Alignment Procedure
Set Modulator Tones Using Built-in Calibration Software
= INT 525000 / Flow +
= 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 Frequencies
Page
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 Setting
BPS 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
MFJ P/N
Descrpition Component ID
RESISTORS, 1/4 WATT, 5%
RESISTORS, 1/8 WATT, 1%
MFJ-1278B MULTI-MODE Appendix I Parts List
Capacitors MULTI-LAYER, Monolithic Ceramic
TRIMPOTS, Bourns or Equal
Trim POT Single TURN, Miniature
POT 17MM Single TURN, PCB Mount
Capacitors Electrolytic
Capacitors MYLAR, 50V/100V
Capacitor Other Types
IC Sockets LOW Profile
ICS
Do not use 74HCT14 for these ICs
Transistors
DIODES/LEDS
Voltage Regulator
Connectors
Miscellaneous
Mounting NUT for R131
For Installing Cover
Display PC Board Assembly
Grayscale PC Board Assembly
BOM for Display PC Assembly P/N
This is to Insure Good Contact with Chassis Reduce EMI
Addition Parts for MFJ-1278BT only
BOM for Grayscale PC Assembly P/N
Resistors 1/8W, 1%
Trimpot 15 Turns, Bourns or Equal
ICs
Descrpition Component ID Capacitor Monolithic Ceramic
Capacitor 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 Connector
CENTER, 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