MFJ MFJ-462B User Manual
MFJ-462B MultiReader
Specifications ............................................................................................................................................ 2
Connections............................................................................................................................................... 2
Power............................................................................................................................................2
Printer Port.................................................................................................................................... 2
Audio Input................................................................................................................................... 2
Hand Key...................................................................................................................................... 2
Jumpers......................................................................................................................................... 2
Basic Operation ......................................................................................................................................... 3
Menu Operation......................................................................................................................................... 3
Main Menu ................................................................................................................................................ 4
Signal Setup.................................................................................................................................. 4
Baud Rate Setup ........................................................................................................................... 5
Printer Setup................................................................................................................................. 5
Ram Setup..................................................................................................................................... 5
Reverse Setup............................................................................................................................... 6
Practice Key.................................................................................................................................. 6
Proper Radio Tuning ................................................................................................................................. 6
Tuning in a CW Signal................................................................................................................. 7
Tuning In RTTY/ASCII/AMTOR FEC Signals........................................................................... 8
CW Abbreviations..................................................................................................................................... 9
Technical Assistance ................................................................................................................................. 9
MFJ-462B Schematic Diagram................................................................................................................. 10
MFJ-462B Schematic Diagram................................................................................................................. 11
Table of Contents
TM
..................................................................................................................................... 2
Using a Narrow CW Filter .............................................................................................. 7
Using the LSB Mode....................................................................................................... 7
MFJ-462B MultiReader Instruction Manual
SPECIFICATIONS:
Modes:
Shifts:
Mark Frequency:
Baud Rates:
Printer:
MessageSaver™:
Code Practice:
CONNECTIONS:
POWER
MFJ-462B MultiReader
CW, RTTY, ASCII, AMTOR FEC
RTTY: 170 Hz, 425 Hz, 850 Hz
ASCII: 170 Hz
AMTOR FEC: 170 Hz
US RTTY 2125 Hz
European RTTY 1275 Hz
CW: Approximately 50 WPM max.
RTTY: 45, 50, 57, 75, 100
ASCII: 110
AMTOR FEC: 100
Must be EPSON or compatible
8000 characters volatile RAM
Straight key CW decoding
TM
NOTE: Reverse mode selectable for
RTTY, ASCII, and AMTOR
NOTE: US or European frequency jumper-
selected.
A 12 VDC 300 milliamp power supply should be used with the MFJ-462B. The POWER jack accepts a 2.1 mm
coaxial plug with the center conductor positive and the sleeve negative. An optional DC supply, the MFJ-1312B,
is available from MFJ. Connect your MFJ-1312B Power Adapter or compatible DC supply, coaxial line with
shield ground, into the POWER jack on the rear of the MFJ-462B.
PRINTER PORT
A DB-25 connector is located on the MFJ -462B for use with an EPSON compatible printer. An optional DB-25
to Centronics printer cable, the MFJ-5412, is available from MFJ.
AUDIO INPUT
There are two methods of feeding audio into the MFJ-462B Multi-Reader. The 3.5 mm mono jack, labeled
AUDIO INPUT, can be used with a cable, using the tip as audio and shield as ground. An optional 3.5mm audio
cable, the MFJ-5162, is available from MFJ. The 5-pin DIN jack can be used with a cable using pin 4 as audio
and pin 2 as ground. This connection scheme matches popular TNC connections so that you may use ready-made
TNC cables.
HAND KEY
A hand key may be used with the MFJ-462B for CW code practice. Connect your hand key to the 3.5mm HAND
KEY jack on the rear, with the tip to the key and the shield to ground. To listen as you practice your code, place
the SPEAKER SELECT switch on the rear panel IN to the HANDKEY position. For normal operation, this
switch should be in the RADIO (OUT) position.
JUMPERS
Jumpers J6, J7, and J8, located inside on the right side of the unit, are for setting either the US or European
RTTY frequency shifts. The unit comes with pins 2 & 3 of each jumper shorted, for use with the US RTTY
shifts. If you require the European RTTY shifts, then short pins 1 & 2 of J6, J7, and J8.
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MFJ-462B MultiReader Instruction Manual
BASIC OPERATION:
The MFJ-462B
MultiReader
unit. After turning the unit ON, the MFJ-462B will light the PWR LED and display a scrolling sign-on message
across the LCD. On the left side of the unit is a hole for LCD contrast adjustment. When the display shows the
SIGNAL SETUP prompt, the MFJ-462B is ready for operation. All the MFJ-462B requires for proper operation
is that you select the signal type that you wish to decode, the signal baud rate, along with tuning to the desired
signal on your radio. Some signals may require that you select the REVERSE function to properly decode the
desired signal. Once you properly tune your radio to the desired signal, the MFJ-462B begins to display the
decoded signal information. If characters cannot be decoded, which is the case for some RTTY signals, an
underscore character ("_") will be scrolled for each undecoded character. If the unit is not decoding characters
correctly, check the format setting to confirm that it is correct.
TM
is easy to operate. The push-button marked POWER controls the power to the
MENU OPERATION:
The MFJ-462B menu system consists of two front panel push-buttons labeled OPTION and SELECT along with
the LCD display. Pressing the OPTION button changes the option being displayed on the LCD. The available
OPTIONS within the MFJ-462B operating system are shown below:
1. SIGNAL SETUP
2. BAUD RATE SETUP
3. PRINTER SETUP
4. RAM SETUP
5. REVERSE SETUP
6. PRACTICE KEY
Pressing the SELECT button executes the OPTION currently displayed on the LCD, and goes to a sub-menu.
Under each sub-menu are other selectable options. The options under the sub-menus are the actual mode
settings, such as OPERATING MODE, BAUD RATE, PRINTER ON/OFF, RAM PLAYBACK and RAM
SCROLLING, just to name a few.
For example, turn the unit ON, and wait a few seconds for the unit's sign-on message to finish. When the MFJ462B finishes its sign-on message, it displays the first main menu option, SIGNAL SETUP. Pressing the
OPTION button displays the second main menu option, BAUD RATE SETUP. Pressing the SELECT button
now causes the MFJ-462B to switch to the BAUD RATE SETUP sub-menu and display the first option, 45
BAUD. Pressing the SELECT button now tells the MFJ -462B to select 45 baud as it's decode baud rate, and to
return to the main menu option, BAUD RATE SETUP. Pressing the OPTION button repeatedly will cause the
unit to scroll through the next main menu options, PRINTER SETUP, RAM SETUP, REVERSE SETUP, and
PRACTICE KEY and then back to the f irst main menu option, SIGNAL SETUP. Pressing the SELECT button
now tells the MFJ -462B to switc h to th e SIGNAL SETUP sub-menu and display the first option, CW. Press the
OPTION button to switch the display to RTTY 170 and then press the SELECT button.
ready to decode 45 baud, 170 shift RTTY.
Refer to Figure 1 for the MFJ-462B
MultiReader™
The MFJ-462B is now
menu layout.
3
MFJ-462B MultiReader Instruction Manual
SIGNAL SETUP BAUD RATE SETUP PRINTER SETUP RAM SETUP REVERSE SETUP PRACTICE KEY
!
! !!!! !!!! !!!! !!!! !!!!
!!
CW
RTTY 170
RTTY 425
RTTY 850
ASCII
AMTOR FEC
MAIN MENU
45 BAUD
50 BAUD
57 BAUD
75 BAUD
100 BAUD
MAIN MENU
PRINTER ON/OFF
MFJ MULT I-READER
CW, RTTY, A SCII,A MTOR...
COPYRIG HT MFJ ENTE RPRISES 1994
MAIN MENU
RELEASE XXX
!!!!
RAM PLA YBACK
SCROLL SLOWER
SCROLL F ASTER
PRINT RAM ON/OFF
CLEAR RA M
MAIN ME NU
REVERSE ON/OFF
MAIN ME NU
PRACTICE ON/OFF
MAIN ME NU
MFJ-462B MultiReader™ Menu Layout
Figure 1
MAIN MENU:
The main menu allows you to select the configuration sub-menus, so you can set-up the MFJ-462B to decode the
various signals of which it is capable. There are six main menu OPTIONS:
1. SIGNAL SETUP
2. BAUD RATE SETUP
3. PRINTER SETUP
4. RAM SETUP
5. REVERSE SETUP
6. PRACTICE KEY
Press the OPTION button to change the menu options, then press the SELECT button to enable a sub-menu.
When the PRACTICE KEY option is displayed and you press the OPTION button, the MFJ-462B returns to the
beginning of the main menu, SIGNAL SETUP.
SIGNAL SETUP
The SIGNAL SETUP sub-menu allows you to choose the type of signal that you want the MFJ-462B to decode.
There are seven sub-menu selections:
1. CW
2. RTTY 170
3. RTTY 425
4. RTTY 850
5. ASCII
6. AMTOR FEC
7. MAIN MENU
Press the OPTION button to change the sub-menu options. Once the signal type you want is displayed on the
LCD, press the SELECT button to begin decoding the type of signal you selected. When you press the
SELECT button again, the MFJ-462B will exit signal decoding, and return to the SIGNAL SETUP sub-menu. If
you are in the RTTY mode, and the MFJ-462B is not decoding the signal, you may have the signal baud rate set
improperly. In this case, you can press the OPTION button to exit decoding and go to the BAUD RATE SETUP
sub-menu. At the BAUD RATE SETUP sub-menu, you may select another baud rate setting, then return to the
SIGNAL SETUP sub-menu and re-enter the previous RTTY mode. To exit this sub-menu without selecting a
signal type, press the OPTION button until the display reads MAIN MENU, then press the SELECT button to
exit.
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