MFJ MFJ-1224 Instruction Manual Download Page 16

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MFJ-1224 Instruction Manual

RTTY/CW Computer Interface

+5VDC

NOT USED

B. Using Kantronics Hamsoft



Software

NOTE:

The DIP switches must be set for this software as follows:

MFJ-1224 "K" Connector

Apple Game Port

MFJ-1224 DIP Switches

DEMOD

OFF

GND

OFF

CW KEY

RTTY

OFF

CW ID

OFF

C. Using the AEA-Software

NOTE:

The DIP switches must be set for this software as follows:

MFJ-1224 General Connector

Apple Game Port

MFJ-1224 DIP Switches

RTTY DEMOD

2 (PBO)

CW DEMOD

4 (PBO)

GND

8 GND

OFF

CW ID

NOT USED

OFF

RTTY

15 (ANO)

PTT

14 (AN1)

OFF

CW KEY

13 (AN2)

OFF

+5VDC

NOT USED

_____________________________________________________________________

IV. TRS-80 COLOR COMPUTER



A. Using the Kantronics Software.

NOTE:

The DIP switches must be set this software as follows:

MFJ-1224 "K" Connector

Hamsoft



Pac

MFJ-1224 DIP Switches

DEMOD

OFF

GND

OFF

CW KEY

RTTY

OFF

CW ID

OFF

Summary of Contents for MFJ-1224

Page 1: ...ur computer and which has the features you want When unpacking make sure that all of these items are included 1 INTERFACE 1 EIGHT PIN MIC PLUG 1 RCA CABLE 1 FIVE PIN PLUG 1 MIC CABLE WITH FIVE PIN PLUG ATTACHED and 1 OWNERS MANUAL THE 12VDC AC ADAPTER IS OPTIONAL FRONT PANEL The front panel controls and indicators consist of five push button switches and four L E D s From left to right they are as...

Page 2: ...hift and 850hz shift NORMAL REVERSE This switch inverts the demodulated RTTY signal being sent to the computer BACK PANEL The MFJ 1224 provides inputs and outputs to allow interfacing to nearly any possible combination of computer and transceiver The back paragraphs below describe their uses Only a few of the available connections will be used for an given application however the availability of a...

Page 3: ...five pin jack labeled K connector because it is specifically designed for use with KANTRONILCS software From left to right the pins are as follows DEMOD This pin produces the same output as the DEMOD OUT jack GROUND This pin provides the ground connections between the interface and the computer CW KEY This input pin allows the computer to key the transmitter through the interface A low on this pin...

Page 4: ...rols the mark and space shift for RTTY transmission PTT This input controls the push to talk switch of the transmitter CW KEY This input controls the transmitter keying circuit 5VDC This input provides a 5 volt supply for external circuitry such as an RS 232 converter Next is a five pin jack which is used for the microphone connection From left to right the pins are as follows PTT OUT This pin is ...

Page 5: ...on the GINERAL PURPOSE CONNECTOR and DIRECT and GRID BLOCK Connections depend on the type of computer and transceiver used Either the GENERAL CONNECTOR or the K CONNECTOR will be connected to the computer CONNECTIONS FOR CW For transmission and reception of CW the following connections are necessary 1 A 12VDC power supply to the POWER jack of the interface 2 A shielded audio cable from the externa...

Page 6: ...nnected when used for AFSK operation Consult the owner s manual for your transceiver to determine the proper connection of the MICROPHONE JACK The white wire is the audio line the red wire is the PTT line the black wire is the PTT ground line the bare shield wire is the audio ground and the green wire is the DSK line 5 The control cable from the computer to the interface 6 If the interface is to d...

Page 7: ...using the Kantronics software it will ask you to PRESS K for Kantronics interface or T for user terminal unit You must press K If you press T your transmitted RTTY will be inverted TELETYPEWRITER OPERATION If your radio teletype provides TTL voltages for input and output you can hook it directly to the MFJ 1224 If not you will have to use the loop supply circuit and a current loop to the TTL inter...

Page 8: ...224 s PHASE LOCK and DATA L E D s light Finish the setting under the heading FINISH Transceivers with CW filters RIT and IF SHIFT Adjust RIT for a higher pitch Note that as the pitch goes up the signal begins to move out of the PASSBAND of the CW FILTER S Meter starts to fall Using IF SHIFT move the CW FILTER PASSBAND keeping it over the signal S Meter UPSCALE Continue raising the pitch with the t...

Page 9: ... As you tune higher in pitch the following occurs A The PHASE LOCK L E D blinks On and Off with the code B Both PHASE LOCK AND DATA L E D s blink On and Off simultaneously C Both L E D s remain Off IMORTANT The only correct tuning occurs at B above when the PHASE LOCK and the DATA LED s blink ON and OFF simultaneously with the code When the PHASE LOCK and DATA L E D s are blinking simultaneously w...

Page 10: ...n 4 Continue tuning until you see the most pronounced ON and OFF blinking of the DATA L E D TO CALIBRATE The MFJ 1224 Computer Interface is adjusted at the factory However should re calibration be necessary here is the procedure for all frequency related devices in the computer interface CALIBRATION OF THE PPL FREQUENCY 1 Set the MFJ 1224 Computer Interface to receive ASCII at 300 baud 170Hz shift...

Page 11: ...oise CALIBRATION OF THE MARK FREQUENCY 1 Connect the computer or radioteletype control to the MFJ 1224 2 All DIP switches in the 1224 should be OFF 3 Turn the Interface On and set the front panel switches for RTTY 170Hz shift and NORMAL polarity 4 Enter the program into the computer If using a radioteletype go down to 8A 5 If you are using Kantronics Hamsoft press K when asked to choose K if using...

Page 12: ...tion of the MARK Frequencies 3 The frequency counter should read 2975Hz 4 If the counter doesn t read 2975Hz adjust VR4 See Fig 4 for a reading of 2975Hz 2Hz SOFTWARE CONSIDERATIONS DIP SWITCH There is an eight switch DIP package on the PC board These switches are used to configure the inputs and outputs of the GENERAL PURPOSE CONNECTOR to work correctly with your computer and software The followi...

Page 13: ...he MFJ 1252 or the MFJ 1264 Software NOTE The connector cable supplied with the software has the proper connections for the GENERAL CONNECTION PORT and the VIC USERS PORT The DIP switches are set at the factory for this computer software and cable MFJ 1224 General Connector User Port MFJ 1224 DIP Switches RTTY DEMOD B C L 1 ON CW DEMOD B C L 2 ON GND N 3 ON CW ID H 4 OFF RTTY J M 5 OFF PTT IN NOT ...

Page 14: ...rt MFJ 1224 DIP Switches RTTY DEMOD B C 1 ON CW DEMOD D 2 ON GND 1 3 OFF PTT J 4 OFF RTTY M 5 ON PTT IN NOT USED 6 OFF CW KEY K 7 ON 5VDC NOT USED 8 OFF II C 64 A Using the MFJ 1265 or MFJ 1253 Software NOTE The connector cable supplied with the software has the proper connections for the GENERAL CONNECTION PORT and the C 64 USERS PORT The DIP switches are set at the factory for this computer soft...

Page 15: ...e AEA SOFT and MBA TEXT VERSION 1 2 Software NOTE The DIP switches must be set for this software as follows MFJ 1224 General Connector User Port MFJ 1224 DIP Switches RTTY DEMOD J 1 ON CW DEMOD J 2 ON GND 1 12 A N 3 OFF CW ID NOT USED 4 ON RTTY F 5 ON PTT IN E 6 OFF CW KEY H 7 OFF 5VDC NOT USED 8 OFF _____________________________________________________________________ III APPLE A Using the C H GA...

Page 16: ... this software as follows MFJ 1224 General Connector Apple Game Port MFJ 1224 DIP Switches RTTY DEMOD 2 PBO 1 ON CW DEMOD 4 PBO 2 ON GND 8 GND 3 OFF CW ID NOT USED 4 OFF RTTY 15 ANO 5 ON PTT 14 AN1 6 OFF CW KEY 13 AN2 7 OFF 5VDC NOT USED 8 ON _____________________________________________________________________ IV TRS 80 COLOR COMPUTER A Using the Kantronics Software NOTE The DIP switches must be ...

Page 17: ...PIN 3 3 OFF CW ID NOT USED 4 OFF RTTY PIN 4 5 OFF PTT IN NOT USED 6 OFF CW KEY PIN 4 7 OFF 5VDC NOT USED 8 ON NOTES 1 A TTL TO RS 232 CONVERTER MUST BE USED WITH THE CLAY ABRAMS SOFTWARE We recommend the MFJ 1223 2 PLACE A luf ELECTRONIC CAPACITOR FROM PIN 2 DATA IN OF THE SERIAL I O TO GROUND Hamsoft and Hamtext are trademarks of Kantronics Inc VIC 20 is a trademark of Commodore Business Machines...

Page 18: ...3 0549 or the MFJ Factory at 601 323 5869 You will be best helped if you have your unit manual and all information on your station handy so you can answer any questions the technicians may ask You can also send questions by mail to MFJ Enterprises Inc 300 Industrial Park Road Starkville MS 39759 by Facsimile FAX to 601 323 6551 or by email to techinfo mfjenterprises com Send a complete description...

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