MFJ-1270C/1274C MANUAL TABLE OF CONTENTS
iii
TABLE OF CONTENTS
TABLE OF CONTENTS.............................................................................iii
INTRODUCTION .......................................................................................1
Items supplied with MFJ TNC package.........................................2
Optional items available for the MFJ TNC....................................3
COMPUTER INTERFACING ....................................................................4
MFJ Terminal Software Starter Packs ...........................................4
Computer Interfacing with MFJ Starter Packs.................5
Computer Interface without MFJ Starter Pack ................5
Serial Port Signals..........................................................................5
Computers with Specific Serial Interfaces.......................7
Apple Macintosh ...............................................7
Commodore C64, C128 and VIC-20.................8
IBM PCjr...........................................................9
Radio Shack Color Computer............................9
Radio Shack Model 100/102 and NEC 8201 ....9
IBM PC/XT/AT/386/486 and compatibles
Computer...........................................................10
Other Computers with Non-standard Serial Ports............12
Terminal Software Requirements...................................................12
Apple Macintosh .............................................................13
Apple II, II+, IIe, IIc........................................................13
Commodore C64, C128 and VIC-20...............................13
IBM PCjr.........................................................................14
IBM PC and Compatible Computers...............................14
Radio Shack Color Computer..........................................15
Radio Shack Model 100/102 and NEC 8201...................15
MFJ TNC Serial Port Pin Functions .............................................15
Computer Baud Rate......................................................................16
Verifying Serial Port Operation.....................................................17
RADIO INTERFACING .............................................................................20
MFJ TNC Radio Port....................................................................20
Radio Port Connection ....................................................21
Handheld Radio Connection............................................21
RADIO INTERFACING METHODS ...........................................23
Method 1: Direct Connection to Microphone and
Speaker............................................................................23
Transmit Audio Level Adjustment for
Method I Interface.............................................24
Setting the Receiver Audio Input Level...........................25
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