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MFJ-56 Installation Manual

1. MFJ 56B 128K MFJ 56C 512K Above mailbox memory expansion boards are available from MFJ dealers or from MFJ Enterprises Inc This procedure for mailbox operation replaces the procedure given in the main MFJ 1278 manual Chapter 5 page 21 25 Set Up your Easy Mail Mailbox The MFJ Easy Mail Mailbox is now a Single user device The Mailbox can now be operated independently from the standard packet operation There are certain commands which need to be set These will be explained later in this instruction NOTE Whenever lt CR gt is found in this instruction this means to press the RETURN key not to type lt CR gt 1 Under the cmd prompt type MYMCALL n lt CR gt where n is the callsign you wish to for your mailbox 2 Type USERS 1 lt CR gt 3 If you want your messages time and date stamped then set DAYTIME with the current information Please refer to Chapter 6 Page 42 in your MFJ 1278 operations manual as to how to set the DAYTIME parameter NOTE An optional TNC real time clock MF J 43 for the MF J 1278 is available from MFJ Enterprises With this real time clock module installed in your MF J 1278 the clock will continues to 35 MF J 56A B C Mailbox Memory Pactor Expansion keep time even with the MF J 1278 turned off You will not have to set your MF J 1278s DAYTIME every time your MF J 1278 is powered up 4 Type MAILBOX ON lt CR gt Now your MFJ 1278 is ready for simultaneous
2. R Allows you to read the message in slot nn Where nn is a particular slot number This command works the same as the R command except its for reading the individual slots S call This allows the remote user local or remote SYSOP to send a message to the designated callsign CALL must be a callsign valid under the same format as the MYCALL CONNECT or other callsign commands You can also send messages in NTS National Traffic System format You will need to refer to the ARRL NET DIRECTORY for more detailed information on the NTS system SP cal This allows the remote user local or remote SYSOP to send a personal message to the designated callsign This is a private message and only the person to whom the message is addressed can read or kill it The SYSOP can also read the private messages When a private message is listed a P flag is shown in the Message Type flag block The P flag can also be inserted by the originator or the SYSOP through the Edit command 40 MFJ 56A B C Mailbox Memory Pactor Expansion T This command allows the remote user to page the SYSOP When the T command is invoked from the remote user the following message appears on the SYSOP s computer screen and it also is sent back to the remote user s screen Paging SYSOP any key aborts The Mailbox will page the SYSOP by ringing the SYSOP s terminal bell 30 times If the SYSOP is at his or her terminal the asterisk character will appear on the scree
3. Digital Memory ARQ MFJ s pactor incorporates Digital memory ARQ Memory ARQ enables the reconstruction of a good packet when a retried packet is repetively received with one or more bit errors Memory ARQ is accomplished by accumulating the bit value 1 or 0 derived from the RF input port during sucessive receptions of the same error laden packet and then passing the series of accumulations to the receiver shift register Thus a correct packet may be reconstructed from 2 or more bad packets The number of accumulations performed for each bit are controlled by the MAXSUM parameter Larger values tend to increase the effectiveness of the memory ARQ scheme but only up to a point A too large value in the presence of excessive QRM QRN or QSB tends to accumulate so many bit errors that the subsequent reception of an almost perfect packet will be inadequate to overcome the accumulated noise On the other hand a too small value will accumulate too few samples to correct for moderate error rates The default value represents a compromise feel free to play around with the setting LEDs The STA and CON leds on the front of the TNC will help in determining the TNC status while in the PACTOR mode Please refer to Table 2 1 on the following page for information on what is happening during the four 4 led conditions 10 MFJ 56A B C Mailbox Memory Pactor Expansion MON The TNC is idling and has not monitored any information packets in
4. Huffman coding offers somewhere between 2 1 and 4 1 compression on lower case German and English plain text In receiving modes conversion to 8 bit data is automatic On transmit the TNC packetizes outgoing data and transparently selects the mode Huffman coding will be used if all data are 7 bit ASCII characters and huffman coding is at least as efficient as straight 8 bit coding MFJ 56A B C Mailbox Memory Pactor Expansion Flow Control Flow control Hardware flow control is always on Software flow controls defaults to on using the XON and XOFF parameters Unlike TNC operations the same characters are used for receive flow control as for transmit flow control Typein flow control is only effective while entering commands at the p_cmd prompt AMTOR while in PACTOR mode AMTOR calls 1278 rev 10 only MFJ s Pactor implementation is downward compatible with AMTOR only stations That is even if the TNC is in pactor p_cmd mode it will automatically detect and respond to incoming AMTOR ARQ connection attempts This allows your buddies with AMTOR only controllers to call you even though you are in the pactor mode To enable the AMTOR call detection feature you must have previously entered your AMTOR selective callsign in the a_cmd MYSELCAL parameter Furthermore you must have the appropriate sideband usually LSB selected because unlike PACTOR AMTOR is polarity dependant How AMTOR while in PACTOR mode detection works Pact
5. command is given the MFJ 1278 will switch to AMTOR mode B Follow the AMTOR operating procedure to go to any of the other AMTOR modes If the user does not issue the OK AMTOR command the MFJ 1278 will switch to 100 baud RTTY Note that if RTTY or ASCII signals are analyzed and the user accepted the result by typing OK and the MFJ 1278 still does not copying the signal correctly This may due to the signal being encrypted with bit inversion Most of the time two or three bits of the RTTY character may be inverted and it is possible for all 7 bits to be inverted If the baud rate and the type of signal has been determined by ASA and the MFJ 1278 still does not copy correctly the signal may be encrypted with bit inversion In this case you may want to try to use the RBitmask command to set various inversion patterns to match the receive signal but manual setting of the RBitmask command is not necessary The RBitmask command can be invoked when the MFJ 1278 is in the RTTY or ASCII receive mode by simply issuing the CTRL U while the MFJ 1278 is in converse mode Once CTRL U is pressed MFJ 1278 will automatically cycle through each of the bit combinations and then display a sample text of each one of the combination on the screen Examine the list of the displayed text on the screen and if one of the 32 sample text looks normal then make note of the combination number next to the text Do the following to select this combi nation
6. TVB 80 49 4B 4D 4F 51 53 55 57 59 5B 5D 5F 61 63 3 TVB 80 4A 4C 4E 50 52 54 56 58 5A 5C 5E 60 62 64 4 TVB 80 4B 4D 4F 51 53 55 57 59 5B 5D 5F 61 63 65 5 TVB 80 4C 4E 50 52 54 56 58 5A 5C 5E 60 62 64 66 6 TVB 80 4E 50 52 54 56 58 5A 5C 5E 60 62 64 66 68 7 TVB 80 4F 51 53 55 57 59 5B 5D 5F 61 63 65 67 69 8 TVB 80 50 52 54 56 58 5A 5C 5E 60 62 64 66 68 6A 9 TVB 80 51 53 55 57 59 5B 5D 5F 61 63 65 67 69 6B The default RXBright is 4 Remember that the higher RXBright value from 1 9 the brighter the received picture will be If your terminal program does not support 16 gray levels remember to set the command 8 Levels on and 16 Levels off The MFJ 1278 will automatically select 8 TVBreak values In SSTV transmitting the PIXtones and command have been update to 16 levels The default Pixtones values are as follows The default PIXtones values are as follows BF BB BD B9 BE BA BC B8 98 A8 88 B0 90 A0 58 40 The pixtones command serves the same function as in RXBright but in the transmitting of SSTV and FAX pictures FAX OPERATION UPDATE FAX operation has been updated from 8 gray levels to 16 gray levels Color FAX is also supported Note that as in the case SSTV multi gray level and color FAX must be supported by using a special terminal program 29 MFJ 56A B C Mailbox Memory Pactor Expansion If you
7. a disconnect from the link after the time which the SYSOP specifies This command gives the SYSOP control over the mailbox by allowing him to force a disconnect on the mailbox link It may also be used to avoid any QRM to abort a forward in progress You can also use it to terminate mailbox usage by an unwelcome user The new Mailbox system is fully compatible with NTS packet messages also It allows you to format NTS type messages and send them to another destination The MFJ 1278 also incorporates a new bytes free counter It is updated as the mailbox fills or empties In the case of the MFJ 46B and MFJ 46C 128K and 512K respectively it keeps up with the available RAM in multiple memory banks Mailbox Commands Update 49 MFJ 56A B C Mailbox Memory Pactor Expansion MYMcall callsign default blank This is the dedicated callsign for the mailbox If MYMCALL equals MYCALL the TNC responds to incoming connections in mailbox mode When there is no callsign put in MMcall the mailbox is inaccessible to remote users FOrward dest bbs optional via Mode Packet FOrward is an immediate command Messages can be forwarded manually by command or automatically They can also be forwarded hourly or by your local full service mailbox reverse forward request When invoked the mailbox initiates a connect to the callsign of the destination BBS When a connect is established the mailbox will proceed to send your messages Messages t
8. are not using a special terminal program which supports multi gray or color FAX operation you must use the MFJ 1278 built in printer port to receive FAX pictures The MFJ 1278 printer port will only display FAX pictures in 2 levels not in color or multi gray levels If you are using a special terminal program which supports multi gray levels and color FAX operation you must follow the instruction given by the terminal program to operate FAX To operate COLOR or 16 gray levels FAX the commands 8LEvels must be turned OFF and 16LEvels turned ON Note that the commands which affect the brightness and color tint of the received and transmitted pictures are the same as in the case of SSTV These commands are TVBreaks and RXBright for receiving and PIXTones and for transmitting HOST MODE The Host Mode installed in the MFJ 1278 requires a special terminal program to operate Documentation for Host Mode is available on disk from MEJ upon request 30 MFJ 56A B C Mailbox Memory Pactor Expansion MODEM CALIBRATION PROCEDURE UPDATE The Modem Calibration procedure for the MFJ 1278 has been updated for firmware Release 4 1 In Appendix B of the MFJ 1278 manual modem calibration procedure method I page 2 thru page 5 should be replaced by the following procedure Method I Test equipment needed Frequency Counter and probe For all modes 1 Install jumpers on JMP4 and JMP7 2 Place frequency counter at Pin 1 of JMP 9 Pin 1 is t
9. n MFJ 56 Parts Layout Q fe d Co LH Pa h lt h us e i S vd 2S SS 8 Go KU 1402 IM UR OOO o aO a a nee te SEM A N 402 14 Pin Socket cae EE Figure 2 I 425 43256 FROM MOTHERBOARD MFJ 56A B C Mailbox Memory Pactor Expansion NOTE When installing ICs onto the memory board ensure that you do not bend or break any pins Ensure all pins are in the IC socket 6 Check and make sure that there no IC pins are bent under the IC itself Check and make sure that no IC pins are broken off Do this before proceeding beyond this point 7 Set the expansion board aside for now 8 Please refer to Figure 1 when performing this step Using a small phillips screwdriver remove the PC hold down screw in the left rear corner of the TNC mother board this is refered to as HOLE A Do not let this screw out of your sight you ll be using it here shortly 9 Take the 1 2 hex spacer supplied and install it in HOLE A as noted in Figure 1 in this instruction This is the same place where you removed the screw in Step 8 This is an aluminum spacer DO NOT OVER TIGHTEN it you will STRIP the THREADS 10 Now with the memory board in one hand plug the free end of the 40 pin ribbon cable into the IC socket labeled U22 please refer to Figure 1 this is the same one which you removed the Z80 CPU from earlier in this procedure on the mother board
10. the SYSOP returns to command mode Page SYSOP This allows the remote user to Page the SYSOP by ringing the SYSOP s terminal bell This is done by the SYSOP s mailbox sending a CTRL G to the SYSOP s terminal The SYSOP s mailbox will poll the terminal s bell 30 times If the SYSOP does not answer the remote user will receive a message back saying No Answer If the SYSOP does answer then he can go into the Chat mode and converse with the remote user For more detailed information on this feature please refer to the section on Mailbox Set Up in this manual Remote SYSOP 48 MFJ 56A B C Mailbox Memory Pactor Expansion The Mailbox has the capability to be remotely controlled A callsign can be specified by the SYSOP for this purpose This would be useful in the case where the SYSOP is out in the field It would allow him to control the mailbox and do most of the local SYSOP s duties such as killing messages reading editing message headers for forwarding purposes Mailbox CText This is a message dedicated to the Mailbox but is used when a connect is made to the MYMcall callsign It is limited to 120 characters in length If MCText is empty then no message will be sent Idle Timeout Abort The Mailbox incorporates an idle timeout function This is to ensure that the mailbox is still accessible in the event of a remote user drop out during a connection or walks away from the TNC for too long The Mailbox will automatically do
11. to decode and display multi level FAX and SSTV Note that turning l6Levels ON will not turned 8Levels OFF you must turned 8Levels OFF when setting the MFJ 1278 to operate 16 gray levels ANSWRQRA ONIOFF Mode Packet Default ON Parameter ON MFJ 1278 responds to non digipeated UI frames addressed to QRA within 1 to 16 seconds with an empty ID packet OFF Disables MFJ 1278 s ping response function 59 MFJ 56A B C Mailbox Memory Pactor Expansion QRA Who are you pinging is supported in firmware release 4 1 of your MFJ 1278 A QRA ping polls all of the TNCs within range A random number of seconds later each TNC that heard the QRA ping will transmit its identification packet The purpose of this feature is to reveal to the packeteer particularly the transient one the names of all reachable TNCs and digipeaters Sending a QRA ping 1 Set the unprotocol callsign to QRA cmd UNPROTO QRA lt cr gt 2 Manually send an unconnected packet cmd CONVERSE lt cr gt lt CR gt AC cmd This sequence will send an unconnected packet Once the local TNCs have responded with ID packets then the user can press a CRTL C The MFJ 1278 will respond with the cmd prompt MNONPrin ONIOFF default ON Parameter ON Enables printing Non Printable Characters OFF Discards all Packets containing Non Printable Characters The setting of the MNONPRINT parameter determines whether monitored packets containing non printable character
12. upgrade Documentation for the firmware is also supplied You will notice that some sockets on the memory expansion are not populated U413 U422 amp U425 when received These sockets will be populated with ICs to be transfered from the motherboard The various memory expansion boards for the MFJ 1278 T are as follows Model No SRAM Size MFJ 56A MFJ 56B 128K MFI 56C 512K Note that the above models use the same memory expansion board but are packed with a different RAM IC The extra memory provided by the expansion boards are dedicated solely for the use of the packet mailbox The firmware of the multimode does not allocate this additional memory to other operations Battery back up for the memory board is supplied from the mother board EXPANSION BOARD INSTALLATION In this installation you will be required to remove three ICs from the mother board and transfer them to the expansion board Please handle these ICs carefully and make note of the IC numbers and their orientation Throughout this installation instruction we will use TNC to refer to the MEJ 1278 and MFJ 1278T multimodes MFJ 56A B C Mailbox Memory Pactor Expansion Please perform the following procedure very carefully 1 Disconnect all cables from the TNC including power radio and computer 2 Remove the top cover of the TNC by removing the four 4 screws on the sides the unit Then lift the cover off 3 Remove the jumper off of JMP5 This ta
13. 8 MFJ 48BE f Special firmware with packet encryption mode Digitizer available for IBM amp compatible computers only This special MFJ 1278 EPROM firmware release features encrypted packet mode This is designed for commerical use only Contact MFJ Enterprises Inc for more detail Above optional items are available from MFJ dealers or directly from MFJ Enterprises Inc 21 MFJ 56A B C Mailbox Memory Pactor Expansion FIRMWARE INSTALLATION 1 Remove all power from the MFJ 1278 2 Remove the cover by removing the mounting screws on the sides of the cabinet 3 Remove JMP5 jumper to disconnect the Lithium battery 4 Using a small flat tip screwdriver carefully remove the EPROM U23 27C512 from the MFJ 1278 board Make note of the orientation by noting the position of the notch on the IC NOT the label on the IC This is best done with the front panel facing you The location of the NOTCH will be on the left Again DO NOT concern yourself with how the IC label is positioned 5 Install the new EPROM with firmware on the MFJ 1278 board at U23 Make sure that no IC pins are bent under the IC or that no IC pins are became broken off during the installation process Make sure that the notch on the IC is pointed in the same direction as the old EPROM This should be to your left with the front panel facing you If the IC is installed wrong damage to the IC the MFJ 1278 or both can result 6 Install JMP5 jumper 7
14. Be sure to orient the blue connector so that pin 40 and 1 on the blue connector are oriented to the right side of the IC socket with the front panel of the TNC facing toward you You will need to twist the cable slightly Ensure that you leave the CN402 pigtail free and clear do not let it become pinched or caught up underneath anything NOTE If you do not have an MF J 2400 board installed in the TNC skip to step 14 11 If you have an MFJ 2400 modem installed position the 40 pin cable so the cable is not going to be pinched by the mounting stud for the MFJ 2400 modem 12 Now you can re install your MFJ 2400 modem Be sure that you do not pinch any of the wires of the 40 pin ribbon cable or the CN402 pigtail when you tighten the MFJ 2400 down This will cause problems with both the MFJ 2400 and the memory board MFJ 56A B C Mailbox Memory Pactor Expansion 13 Find the original hold down screw which you removed from the TNC motherboard earlier Secure the expansion board to the 1 2 spacer which you installed earlier Again this an aluminum spacer DO NOT OVER TIGHTEN it You will STRIP the THREADS 14 Take note of the location of the NOTCH on CN402 Now plug CN402 into the IC socket labeled U13 socket which the 74HC4066 was removed earlier on the TNC mother board Please refer to either Figure 1 Plug it in so the NOTCH is pointing toward the lithium battery Make sure it is firmly in place 15 Remove the paint if any fr
15. MFJ 56A B C Mailbox Memory Pactor Expansion Table of Contents LS Ee 2 Expansion Board Installapon esse esse se ee se ee ee GR RA ee GR Re ee ee ee ee ee 2 RAM Ennen EE ESE GES ee ee ee ea Re Ge Sek ee E 7 Firmware EPROM Upgrade AAA 7 MFJ acte EE EE EE 8 plett eestor etna ees 8 FEC UNPROTO isi Se iese ge ese ges ee ee See dek ee see 8 Monitoring EE EE N EE EE 8 Speedup Speeddown eee see see se ee ee Ge Ge Ge Se Re ee ee 9 Automatic online COmMpression ees see see ee se ee ee ee 9 Flow Control EE MERE BE se be SEE codes eg Ee BOE pd Ge see De 10 AMTOR while in PACTOR mode 10 Changeover Type ahead se se se Se ee ee ee ee 10 Digital Memory ARQ EE EES ES See O GE EO Gee Deed Ge ee 11 Soe OE RE AR OE Ed 11 COW Identifier ee ege DE RE DEEN 12 MEJ PACTOR Commands eege Se evestetssesussssceoscesspescessecvactesavescensseessenianasees 13 Firiiwaie UW parade tees ds omnea etek et Es E ERF E Sep ef ee dee Ad 18 Upgrade without Grey Level modem 00 0 eee se see ee ee se ee ee ee Ge Se Se 18 Upgrade with the Grey Level modem esse sesse see se ee ee ee ee Se ee Ge Re ee 20 Multi Level Operation without Using Special Terminal Program 20 Multi Level Operation with Special Terminal Program 20 Special Terminal Programmes 20 Terminal Parameters Change 21 Optional Items Available for your MI 318 22 Firmware EEN ED ee EE OE EE EE EE N N 23 Documantation Upgrade 23 Firmware Release 4 1 Documentaion esse sees see se
16. Mailbox Packet operations You as the SYSOP can access your Mailbox by typing SYSOP lt CR gt Your MFJ 1278 will respond with IK MFJ 2 0 M Mailbox ready n free Mailbox B E H elp J K L M R S T gt First of all lets find out what the n free is for The n free is a Bytes Free indicator This applies only to the Mailbox This is a great feature because all users will always know how much space is left in your Mailbox The Mailbox will update the Bytes Free whenever messages are forwarded added or deleted NOTE The M command will not be in Release 4 1 This is due to the fact that there is no Mailbox expansion in the Release 4 1 Now you are ready to operate your mailbox However lets take first things first You very well cannot operate the Mailbox without knowing the functions of the commands So lets take a look at the functions of the Mailbox commands The functions are as follows B Logout This initiates a disconnect sequence from the Mailbox E Edit Message Header This allows editing of the message header This is necessary for the Forward and Reverse Forward functions of the Mailbox The current is first displayed then the Mailbox gets the new values according to what is entered at the prompts it gives the user The local and remote SYSOPs may edit any messages in the Mailbox Remote users may only messages TO and FROM himself and any 36 MFJ 56A B C Mailbox Memory Pactor Expansion message of T raf
17. OFF LFIGNORE OFF MARSMODE 01 UNSHIFT OFF RXLFNOCR ON Once the MFJ 1278 is profiled for MARS operations the user must set the MFJ 1278 into HF RTTY mode by typing 26 MFJ 56A B C Mailbox Memory Pactor Expansion MODE HB 75 lt CR gt Now the 75 specifies the speed at which the MARS operation will be run in this case This speed is the one which NAVY MARINE CORPS MARS uses Other types of MARS may run at different speeds so it will be necessary to insert the proper speed for the type of MARS for which you will be running Once you have set your operating mode the user must press the K key and a lt CR gt in order to enter RECEIVE mode The MARS operator is now ready to receive MARS traffic The operator must then tune the VFO on the radio so the tuning indicator on the MFJ 1278 is centered on the bar graph display The received traffic should be coming to the screen in the proper MARS format Operation Hints for Multicom Here s a good feature of using the MFJ 1278 with the MFJ MULTICOM software Let us say that by the end of day and the operator has 20 pieces of traffic but only 10 of them need to be sent This is where the MULTICOM EDITOR comes in handy You see everything which has come into the Multicom program is saved to a COMM buffer inside the program So at anytime the operator can see all traffic which has been received The operator can go into the EDITOR by pressing the F10 key along with an ALT B The ALT B fil
18. Press CTRL C to go into the cmd prompt then type the number noted above with the RBIT command For example if the combination is 12 you will type RBIT 12 lt CR gt then type K lt CR gt The MFJ 1278 will enter converse mode and begin to display text normally 25 MFJ 56A B C Mailbox Memory Pactor Expansion If another RTTY or ASCII signal from another station is received RBIT must be reset to copy that signal by following the same procedure as described above RBIT can be set to normal no inversion by setting it to RBIT 0 Note that when using ASA noise will have major effect on the degree of its effectiveness If no signal is present while the MFJ 1278 is in ASA mode Wtg CD will be displayed Simply press the Return key to return to CMD command prompt There is no need to type ASA to go back into the ASA mode because once invoked ASA is always active MARS OPERATION Firmware Release 4 1 provides special commands to simplify MARS operation These commands are PROfmars and MARsmode With PROfmars and MARsmode the MFJ 1278 is more compatible with MARS than ever We have made operating MARS with the MFJ 1278 more fun and enjoyable The following section should be very useful to the MARS operator Mars Operation When PROfmars is ON the MFJ 1278 profiles the MFJ 1278 for MARS operations When this command is invoked it sets the following parameters as specified AUTOLF OFF CCITT OFF DIDDLE OFF LFADDALT
19. Replace the cover of the cabinet 8 Apply power to the MFJ 1278 Ensure the MFJ 1278 signs on If not go back and check for IC pins bent under the IC or IC pins which are broken off DOCUMENTATION UPDATE This documentation covers all firmware releases since firmware Release 3 4 If your current firmware is Release 3 3 or older you may purchase a new consolidated MFJ 1278 master manual from MFJ Enterprises Inc for 9 95 shipping included 22 MFJ 56A B C Mailbox Memory Pactor Expansion FIRMWARE RELEASE 4 1 DOCUMENTATION The MFJ 1278 is designed to keep pace with the ever changing field of digital communication technology By simply changing the firmware of the MEJ 1278 existing features of the MFJ 1278 can be improved and new features can be easily added The following section of this manual documents the improved features as well as new the features which were added since the printing of the main manual supplied with your MFJ 1278 If you do not have the latest MFJ 1278 manual 4th Edition you may purchase it from MFJ for 9 95 shipping included AUTOMATIC SIGNAL ANALYSIS ASA The ASA Automatic Signal Analysis feature has been greatly improved in the firmware release ASA can analyze received signals such as RTTY ASCII AMTOR mode b and HF Packet It will tell you the speed data bits and whether or not the signal is inverted ASA automatically switches the MEJ 1278 to the correct mode once you accept the results of th
20. V and FAX pictures SSTV pictures printed on the MFJ 1278 printer port will be in 4 gray levels and FAX pictures will be in 2 levels Multi Level Operation with Special Terminal Program If you are using a special terminal software as described below your MFJ 1278 can transmit and receive up to 16 gray levels in FAX and SSTV modes The MFJ 1278 is also capable of transmitting and receiving COLOR SSTV and COLOR FAX provided a special terminal program is used Special Terminal Programs IBM AND COMPATIBLES Computers The MFJ Advanced Starter Pack MFJ 1289 MULTICOM version 3 1 terminal program for IBM and compatible computers lets you transmit and receive multi gray level FAX and color SSTV 19 MFJ 56A B C Mailbox Memory Pactor Expansion If you have an earlier MFJ terminal program MFJ 1284 MFJCOM or Multicom version 2 2 you can upgrade it to the new MULTICOM version 3 1 terminal program by ordering the MFJ 49B for 5 1 4 disks or MFJ 49BM for 3 1 2 disks for 29 95 by sending in the old disk 1 or proof of purchase COMMODORE C64 C128 COMPUTERS The C64 128 Starter Pack MFJ 1282B MULTICOM64 terminal program supports multi gray level SSTV and FAX operation MULTICOM64 receives and transmits in 4 levels of gray in both the SSTV and the FAX modes If you have an earlier version of the MFJ C64 128 terminal program MFJ 1282 which does not support multi gray level operation you may contact MEJ for upgrade informat
21. a connect attempt to someone else the called callsign must be at least 4 characters in length and the signal of sufficient quality that the 200 baud area is received error free Unfortunately the callsign in the connect attempt packet unlike all other other monitored data is subject to corruption the Pactor protocol did not provide for error free connect packets Therefore you may at times see a garbled callsign in a Connect message but it should be rare Remember this garbling affects only monitored connect attempt packets It does NOT affect ARQ or FEC data packets because they are error protected by a sophisticated CRC checking scheme Speedup Speeddown Speedup and speeddown When the TNC is the receiving station IRS after MAXDOWN consecutive failures to receive a 200 baud packet the TNC requests a speedown to 100 baud Speedup occurs when MAXUP consecutive error free 100 baud packets are received provided speedup is not inhibited by NO200 set to ON Bad band conditions Faster links may sometimes be achieved during unusually poor conditions by avoiding 200 baud operations Setting NO200 to ON instructs the TNC to avoid 200 baud operation in a compatible way When forced 100 baud operation is combined with digital memory ARQ always on by default the TNC is capable of operation during extremely poor fading distortion QRN conditions such as are found on 160 80 and 40 meters Automatic online compression Huffman coding
22. ailbox are available to you You may then type M to switch the memory bank of the Mailbox K to kill a message L to list all messages R to read the messages S to send a message B to logout and disconnect from the Mailbox or H for the HELP menu 3 To send a message the S or the SP commands must be used It must be used in conjunction with a callsign as in the examples below SKB5JNZ lt CR gt this will send an ordinary message to the callsign KB5JNZ or SP KB5JNZ lt CR gt this will send a private message to the callsign KB5JNZ The Mailbox will respond with Title The user will enter the message subject title at cursor prompt then press the RETURN key 42 MFJ 56A B C Mailbox Memory Pactor Expansion The Mailbox will respond with Send msg Control Z or EX to end The user will then enter the message at the cursor prompt If you are using a 512K or 128K Mailbox then you can actually upload disk files into the Mailbox The 32K version has the same capability but with 32K RAM capacity At the end of the message press a Control Z and the RETURN key The message will be sent Your message will be seen on the mailbox station s screen then the mailbox will respond with the mailbox command prompt nn free n Mailbox B E H elp J K L M R S T gt Where nn is the bytes free indicator This tells the user how much ram space is available in your Mailbox Also n is the indicator of the current memory bank in u
23. as described above default ccc is 1 5 chars long Selects the string to display when an unconnected packet is monitored out of sequence Set first character to or EI to clear default ON When ON the TNC responds to connect packets that match all the letters in your callsign and no more When OFF the looser buggy pactor specification comes into play and your TNC responds to any connect packet containing at a minimum the contents of MYCALL EXACTCAL matching will not always work to filter out improper callsigns when the offending unit is the pacomm pactor version 1 0 unit because of its use of regular ascii 0x55 U characters to fill and terminate callsigns MFJ uses ascii OxOf as specified in pactor documents instead of 0x55 to fill and thus fixes the bug default ON same as 1278 but operates only in p_cmd mode This limitation is due to rapidly changing transmit lt gt receive status of a pactor link Applying FLOW to data would improperly hold off the important changeover signal and is therefore disallowed Immediate command Generates an immediate CW ID 6 lt nn lt 255 default 59 590 seconds This parameter specifies the time interval 10 between automatically generated cw id events The actual time yielded equals IDTIME 10 seconds IDTIME is only relevant when bit 0 of the CWIDMODE parameter is set to 1 13 MFJ 56A B C K LC callsign Mailbox Memory Pactor Expansion Puts you in conv
24. c Signal Analysis Automatically identifies HF packet RTTY ASCII and AMTOR signals ASA works with the OK command to accept the mode 5 PROFMARS a command which sets the MFJ 1278 to Mars operation automatically 6 ANSWRQRA a command which pools all the packet stations within range 7 All Easy mail mailbox functions with or without mailbox memory expansion board 18 MFJ 56A B C Mailbox Memory Pactor Expansion 8 The use of the echo as sent EAS command in CW RTTY and ASCII modes UPGRADE WITH THE MULTI GRAY LEVEL MODEM If your MFJ 1278 is equipped with the multi gray level modem you will have all of the features and commands described in the above section In addition you will be able to transmit and receive up to 16 gray levels in FAX and SSTV modes Note that operation of multi gray level FAX and SSTV requires also an appropriate terminal program such as the MFJ 1289 MULTICOM for IBM and compatible computers or the MFJ 1282B for the C64 128 computers the MFJ 1287B for Macintosh computer and MFJ 1290 for Amiga computer The following are important notes concerning the Release 4 1 upgrade for MEJ 1278 with multi gray level modem board Multi Level Operation without Using Special Terminal Program If you are NOT using a special terminal software which allows printing of multi gray level pictures to the computer screen you may attach an Epson or IBM graphic compatible printer to the MFJ 1278 printer port to receive SST
25. connected the link acts much like AMTOR The station originating the connection is deemed to be the master and he remains in transmit mode until he or the slave initiates a changeover Either station may reverse the direction of the link by issuing a control Y changeover AY in converse mode FEC UNPROTO Unproto FEC UNPROTO packets are transmitted UREPEATS 1 times Selecting larger values of UREPEATS reduced throughput but enhances reliability To transmit in UNPROTO mode issue the appropriate unproto command and type away When done break out to p_cmd mode and type D to terminate transmission MONITORING Monitoring unproto Unlike the German pactor controller our controller is always in listen mode if MONITOR is ON except when connected and in one other situation This other situation occurs when a we ve just terminated a 2 way pactor contact and b the other side initiated the disconnect To prevent Uncontrolled Disconnects lt the capitalized term is defined in the ptc docs gt we are unable to listen to all kinds unproto connected and connect request of third party pactor transmissions for WAIT x Cycle Time seconds after receiving the other side s last disconnect Cycle time is 1 25 or 1 4 seconds MFJ 56A B C Mailbox Memory Pactor Expansion Connect message Other station s connect attempts received when idle are monitored with a message containing the called station s callsign To sucessfully monitor
26. ction with the OK command Once the user accepted the results given by the ASA MFJ 1278 will select the appreciate modem match the data rate set the RXInvert and will be ready to receive the signal ASA is not effective in analyzing FAX SSTV CW signals and noise OK Mode ASA OK is an immediate command when used in conjunction with the ASA command When the results are displayed when using the ASA mode the user can issue the OK command to accept the results analyzed by ASA Typing OK will cause the MFJ 1278 to select the operation mode and match the speed automatically against the signal being analyzed 56 MFJ 56A B C Mailbox Memory Pactor Expansion PROFMARS Mode RTT Y ASCII Immediate command PROfmars command causes the MFJ 1278 to set the following parameters for MARS operation AUTOLF OFF CCITT OFF DIDDLE OFF LFADDALT OFF LFIGNORE OFF MARSMODE 01 UNSHIFT OFF RXLFNOCR ON MARSMODE n Mode RTTY ASCII Default 0 n n 0 to 3 for n 0 MARS QSO mode TX Translations CR s converted to CR CR LF or to LF only if preceding character was also CR NNNN is sent as NNNN followed by 12 LTRS Characters are translated as follows CR LF 12 LTRS BELL NULL FIGS LTRS Ave TX translations are the same as for QSO mode plus these RX translations CR LF BELL NULL 57 MFJ 56A B C Mailbox Memory Pactor Expansion RXBRIGHT n Mode FAX SSTV Default n 4 Parameter whenn 0 RXBRight assume
27. des Connect call AUtolf ON OFF CBell ON OFF CHObell ON OFF CHOChar nnn CMDCHR nnn CWidmode nn Attempts to connect with call using regular timing default ON Works same as packet default OFF Same as packet default ON When ON an ASCII bell 0x07 character is sent when the pactor link changes directions 0 lt nn lt 255 default 25 Y 0 disables This is the character the TNC initiates a pactor changeover action with See above O lt nn lt 255 default 3 C Same as COMMAND in 1278 O0 lt nn lt 255 default O This bitmapped parameter selects various pactor CW ID features Bit 1 Selects Bit 0 Selects 1 selects initial cwid on locally initiated calls and disconnects disconnects outgoing incoming Also see IDTIME DISPLAY Disconne 1 enables idtimer for cw id on Remotely automatic timed cw ident calls and Immediate command displays all displayable parameters Cleanly terminates the current ARQ or FEC connection 12 MFJ 56A B C DDisc EAa ON OFF ECho ON OFF ERrstrin ccecce EXactcal ON OFF FLow ON OFF ID IDTime nn Mailbox Memory Pactor Expansion Dirty immediate termination of current connection default ON Echo as ACKd When ON the TNC echos transmitted data to the terminal upon receipt of the remote s acknowledgement of the same data default ON Same as 1278 except that echoing is deferred when EAA is ON
28. e se ee ee ee ee Se Se Re ee ee 24 Automatic Signal Analasis ASA 24 ASA Opera Ons se ss ED EE EE Ee ES Se ee 24 MARS Cperatton EE ER EE in 27 Mars Operation oseere ear ee ee ee ee ee et 27 Operation Hints for Multteom sees sees sees see se ee ee ee se see 28 The MARsmode Command iese sees see see se ee ee ee se 29 SSTV Operation Update 29 FAX Operation Update 31 Host Mode e EE EE esea r esetre eens 31 MODEM Calibration Procedure Update 32 Calset Values Update 35 MFJ 56A B C Mailbox Memory Pactor Expansion PACKET Mailbox Update 35 Set Up your Easy Mail Mailbox ee cee se es se ee ee ee ee ee ee ee 36 El Ode ri ER OR EE RE OE OR EE 43 Additional Mailbox Features esse sesse ee ee Se Se Se Re GR GRA GR Ge ke ee 47 Eorwarding EES GR ES Seege 47 Eliciting Reverse Forwards AAA 48 Remote Heard Log siise riss rissen reret 49 Chat Mode ss enn E E R 49 Page SYSOP eniai Mile EE ee ee 49 Remote SYSOP ER Dr EE ee elastin eee 50 Marl box ed EE RE R Soi ESE 50 GIERE SS ER N oes 50 NO EE OR OE ER EN 50 Mailbox Commands Update 51 Additional Commands Update 57 Command Default Update 62 MFJ 56A B C Mailbox Memory Pactor Expansion MFJ 56A B C Mailbox Memory Pactor Expansion MFJ 56 A B C Thank You for purchasing the MFJ 56A B C mailbox memory Pactor expansion board for your MFJ multimode The MFJ 56 is for MFJ 1278 and MFJ 1278T The MFJ 56 memory Pactor expansion board is supplied with the most recent EPROM firmware
29. e signal analysis by typing OK and lt CR gt As you see ASA is extremely helpful when tuning across the amateur or the shortwave bands Let ASA help you determine what kind of signals you are listening to ASA OPERATION ASA is effective in analyzing RTTY ASCII AMTOR FEC mode B and HF Packet Once invoked ASA only takes a few seconds to analyze the tuned in signal Once the result is displayed the user can decide whether to accept by issuing the OK command If the user questions the results ASA will continue to analyze the signal and will display the results after each cycle When the ASA mode is entered the MFJ 1278 will enter the converse mode automatically and display Wtg CD All the you have to do now is to tune in the signal you wish to decode This is done in accordance with the MFJ 1278 operations manual Once invoked ASA will first display the speed and the confidence factor followed by a pause After a 5 to 10 second pause it will display the speed of 23 MFJ 56A B C Mailbox Memory Pactor Expansion modem used to analyze the signal data bits of the signal which will be either 5 6 7 or 8 Any data bit analysis of 6 should not be used and the signal should be re analyzed Last it will display the setting of what it will change the RXInvert command to On or Off This is what ASA will switch the MFJ 1278 to if the user accepts its result The display is in the following format lt Speed gt lt Confidence Fac
30. enables the MFJ mailbox to query another BBS regularly and automatically for the purpose of polling the other BBS for the 47 MFJ 56A B C Mailbox Memory Pactor Expansion TNC user s mail Thus even if your local full service BBS operator is unwilling to forward to you you can still have most of the benefits of auto forwarding because your own TNC will elicit your mail for you on an hourly basis Reverse forwards may be restricted to a particular callsign This prevents others users from stripping messages off of the mailbox prior to their being forwarded to the legitimate destination When all messages are forwarded if the destination mailbox supports reverse forwarding as determined by in it s SID then the MFJ 1278 will attempt to elicit a reverse forward Remote Heard Log This handy feature allows the remote user to query the TNC heard log at any time From this log the remote can determine band conditions or just see who has been around The log holds eleven 11 of the most recently stations Chat Mode The Chat mode feature in the MFJ 1278 Mailbox is similar to the standard TNC converse mode It enables the SYSOP to break onto a mailbox link and get one on one with mailbox user This is just like a regular Packet QSO This is good for discussing problems maybe with the link or with the mailbox in general Chat mode terminates any user or forwarding operation in progress The mailbox will stay in Chat mode until
31. erse mode Initiates an ARQ link to callsign using extended longpath timing to support long txdelays or long skip paths LEdmode 0 1 default 1 Controls whether the 1278 flashesit s LEDs LFADD ON OFF MAXDown nnn MAXSum nnn MAXUp nnn rapidly for each cycle a 200 baud packet is sent received or expected The user may find the flashing of benefitin evaluating link quality and as an indication that the high throughput 200 baud mode is active Also see NO200 parameter default OFF same as 1278 2 lt nnn lt 48 default 4 Controls the number of 200 baud information packet receive errors the TNC tolerates prior to requested speed down to 100 baud 5 lt nnn lt 120 default 30 Specifies the number of cycles of error laden information packets received that are accumulated in the digital memory arq sum buffer for reconstruction When MAXSUM consecutive information receive errors occur on the next receive cycle the sum buffers are re initialized to inhibit the corruption of real time reception by historical receive errors 2 lt nnn lt 48 default 10 MAXUP specifies how many consecutive good receptions of 100 baud information packets are required prior to the TNC s requesting a speeding up to 200 baud Note that a NO200 ON setting preempts the value in MAXUP and if on the TNC will never request a speedup regardless of the MAXUP setting The MAXUP value should be small enough to enable timely speed up in rela
32. essage to be forwardable Only messages with the N flag set trigger the You have new mail message T The T flag indicates that the message is an NTS message Y Messages with the Y flag set are eligible to be killed by the K global kill command 37 MFJ 56A B C Mailbox Memory Pactor Expansion F This flag is set when a message is forwarded Messages which are eligible to forwarded are 1 Messages where the N flag is set 2 Messages that have no addresses that are different from MYMcall Messages with this flag set are private to the sender recipient and the SYSOP Only the person to which the message is addressed to can read or kill it The local or remote SYSOP can read or kill any message in the system Here is an example of a Mailbox message with a Type flag and a message flag inserted Slot 1 PN To KB5JNZ From KF5C BBS Bulletin The P is in the Type flag block which indicates that the message is a Private message The N is in the Message flag block which tells you that the message has not been read by the callsign KB5JNZ When KBSJNZ reads the message the N flag will become a Y flag H elp This command displays the Mailbox command list A brief description of the commands available to user is given This command replies with the TNC s MHeard list The eleven most recently heard callsigns will be displayed The J command only applies to remote users Allows you to kill messages which are addressed to y
33. fic Below are the edit prompts and an explanation as to what their functions are To The callsign of the person the message is going to goes here It must be different than MYcall or MYMcall The callsign of the BBS you wish to Forward the message to is placed here This BBS should be the one where the person whom you are sending the message to gets his mail From The callsign of the person who originated the message is placed here Type The Type of message you are sending is placed here This will turn on a flag in the first flag box There are a few message types and here are a couple listed below 1 T messages These are NTS National Traffic System type messages This message system was developed by the ARRL These messages must be formatted in a certain way Please refer to the ARRL Net Directory for more detailed view and information on this message system 2 P messages These types of messages are still private to the sender recipient and the SYSOP There are other types of messages supported by the Mailbox but without special features Flag The message Flag is now very important All of flags can be set via the S send or E edit commands This flag will either be an N or a Y This will appear in the flag block closest to To block in the message header There are different types of flags are as follows N Messages with this flag set are all able to forwarded providing all other criteria is met for a m
34. g info display 25 lt nn lt 2default 2 20ms Similar to AMTOR s DELAY and packet s TXDELAY The actual delay yielded is TXDELAY 10 ms NB If the combined TXDELAYs of both stations involved in the link exceeds about 180ms then shortpath connections may 15 MFJ 56A B C Mailbox Memory Pactor Expansion not work particularly at longer distances If difficulty is experienced try using the longcall command to connect LC UL Initiate 100 baud FEC U2 Initiate 200 baud FEC URepeats nn 1 lt nn lt 7 default 1 The UREPEATS parameter specifies how many retransmissions to perform for each FEC data packet sent Ex UREPEATS 1 causes each FEC packet to be sent two times WAitdisc nn 10 lt nn lt 255 default 20 The number of cycles our TNC waits to reply to the other TNC that having requested a disconnect fails to hear our disconnect acknowledgement XOFF nn 0 lt nn lt 255 default S Same as 1278 XON nn 0 lt nn lt 255 default Q Same as 1278 see discussion above for more on XON XOFF software flow control 16 MFJ 56A B C Mailbox Memory Pactor Expansion FIRMWARE UPGRADE The MFJ 48B is the latest firmware upgrade for the MFJ 1278 and the MFJ 1278T multi mode data controller This firmware is Release 4 1 Any MFJ 1278 or MFJ 1278T with the mailbox memory PACTOR expansion board installed must use firmware Release 4 1 which is supplied with the memory board Firmware Release 4 1 featu
35. good for a group of messages with the same callsign as MYcall The set conditions of the Type or message flags have an effect on a read process They can be set to an N Y or an F To perform this type R lt CR gt b Messages can also be read individually by the slot number This is good for reading other messages like bulletins or messages addressed to ALL In order do an individual read type Rit lt CR gt Where is the slot number of the message that you wish to read The Mailbox will respond with the message from the slot specified All messages read will be in the following format Slot To From Subject This is an example of a message from the Mailbox Where Slot column is the number of the slot which the messages are in The lower case t is the Type Flag block The lower case m is the Message Flag block The To column will contain the callsign of the person who the message is addressed to The From column will contain the callsign of the person who left the message The Subject column will contain a brief message title Then at the end of the message the Mailbox prompt will be issued 45 MFJ 56A B C Mailbox Memory Pactor Expansion 7 The remote user can also disconnect from the Mailbox without having to issue a CTRL C D and a RETURN All that needs to be done is to type B to logout of the Mailbox and disconnect from the it If you access your Mailbox via the SYsop command then you must issue a CTRL C to e
36. hat qualify for forwarding must meet two conditions they are 1 Have flags of N ot read 2 Must have a callsign in the addresses that are different from MYMCALL After forwarding each message s flag is set to F to prevent further forwards When all messages are forwarded if the dest bbs supports reverse forwarding as determined by in its SID then TNC will attempt to elicit a reverse forward For more information on Forwarding and Reverse Forwarding can be found in the Mailbox Features section of this manual MCText Mode Mailbox Default Text Any combination of characters and spaces up to 120 characters in length This command works like CTEXT except that MCTEXT is sent only when the mailbox MYMcall is connected to There is no express equivalent to the CMSG ON OFF command If MCText is empty no string is sent If the is 50 MF J 56A B C Mailbox Memory Pactor Expansion message longer than 120 characters an error message will be given and the command is ignored The command string can be cleared by typing the command and then entering the sign where the text would normally be entered Also the RESET command will empty the MCText command For example you might want to set your MCText to Welcome to the Mailbox I m not here right but feel free to use the system Enjoy MTimeoutn Mode Packet Default 30 Parameters n 0 250 specifying 10 sec intervals If non zero this is the timeout value e
37. he MFJ 1278 will display the CMD prompt This indicates completion of the Modulator and Demod ulator Calibration Calset Values Update Under Appendix B page 12 of the MFJ 1278 manual add the following Calset values to the table listed CALSET Adjust Modem Remarks 2125 248 R106 Amateur RTTY std 2295 229 R105 Works well on HF Packet 700 R139 PACKET MAILBOX UPDATE In firmware Release 4 1 major improvement is made in the Easy mail mailbox The improved mailbox features can be used MFJ 1278 with or without the expansion mailbox memory However in order for you to fully benefit from this mailbox we recommend that you install the memory expansion board Mailbox memory on your MFJ 1278 can be increased by 32K 128K or 512K This additional memory is also backed up by the lithium battery on the MFJ 1278 mother board The memory expansion board can be purchased separately and it can be easily installed by the user inside the MFJ 1278 The MFJ 1278 equipped with the expanded memory must use the firmware MFJ 48B which is supplied when you purchase the memory expansion board However you must remember to request the B version of firmware upgrade whenever a new upgrade becomes available in the future The different versions of the mailbox memory boards are listed below MFJ 1278 1278T Multimode Data Controller Mailbox Memory PACTOR Expansion 34 MFJ 56A B C Mailbox Memory Pactor Expansion Model No SRAM Size MFJ 56A 32K
38. he top pin of JMP 9 3 In the following procedure all frequencies must be calibrated to within 2 Hz 4 Type TUNEPROC lt CR gt The MFJ 1278 will respond with Calibration Install loopback for TX alignment R139 For 700Hz Adjust R139 for 700Hz 2Hz Press the SPACE BAR on the computer keyboard 5 Adjust R138 for 1500Hz 2Hz Press the SPACE BAR 6 Adjust R78 for 1200Hz 2Hz Press the SPACE BAR 7 Adjust R77 for 2200Hz 2Hz Press the SPACE BAR 8 Adjust R105 for 2295Hz 2Hz Press the SPACE BAR 9 Adjust R106 for 2125Hz 2Hz Press the SPACE BAR 10 Adjust R122 for 2125Hz 2Hz Press the SPACE BAR 31 MFJ 56A B C Mailbox Memory Pactor Expansion 11 Adjust R119 for 2975Hz 2Hz 12 Press the SPACE BAR The MFJ 1278 will respond with Multilevel xmit 1900 13 Adjust R307 for a reading of 1900Hz 1Hz NOTE For step 14 the frequency readings on the frequency counter should be compared to the frequency readouts indicated by the MF J 1278 Note that the difference in the two readings can be as much as 20Hz this is normal 14 With each press of the SPACE BAR the MFJ 1278 will display the following frequencies 1550Hz 20Hz 1600Hz 1650Hz 1700Hz a 1750Hz KR 1800Hz 1850Hz 1950Hz 2000Hz Sg 2050Hz 2100Hz 2150Hz p 2200Hz 2250Hz 15 Press the SPACE BAR The MFJ 1278 will d
39. ilbox are not killed after forwarding process is completed The setting of KILONFWD determines whether or not the TNC deletes a message after it has been forwarded If Mailbox RAM space is critical then you might want to set this command ON Setting this command to ON could cause problems because once a message is killed it cannot be recovered NODeforw Mode Mailbox Default node via x up to 8 vias This is an immediate command It is similar to the FORWARD command except that the NODEFORW parameter is the callsign via path to your NETROM THENET or KA node When your TNC establishes the connection to the node it sends the text in NODEPATH to establish a network link to the receiving BBS If all goes well the forwardee will send its signon string and forwarding will commence To detect failure NODEFORW looks for two strings BUSY and RETR as node connection failure indications Upon finding BUSY or RETR the forward attempt is considered failed and the TNC 52 MF J 56A B C Mailbox Memory Pactor Expansion disconnects from the node The command can contain the callsign of the node and up to 8 vias NODEPath Mode Mailbox Default Enter the command the TNC will issue to command the node connected by the NODEFORW command to link with the receiving BBS Example cmd NODEPATH C KB4VOL cmd NODEFORW PSLS This sequence first connects to the PSL5 node When connected the TNC sends the node connect c
40. in relation to the RAM size are as follows MEMORY SIZE_ BANK NUMBER 32K Dell 128K OTHRUI 512K OTHRU7 NOTE There will be only one 1 number in the at anytime For example let s say that you are running a 128K mailbox and a remote user wants to access memory bank 1 First a connection to your mailbox must be made Once the Mailbox command line is obtained the user will type M0 lt CR gt This will be received by your Mailbox and then your Mailbox will send back a new Mailbox command line 39 MFJ 56A B C Mailbox Memory Pactor Expansion nn free 0 Mailbox B E H elp J K L M R S T gt Thus the 0 indicates the memory bank has been switched to bank 1 NOTE The M function applies only to an MF J 1278 which have the MFJ 56A B or C expansion board installed and Release 4 1x is used R This command lets you read messages addressed to you When you list the messages in the mailbox you notice an N flag next to the messages which you have not read Once you read those messages the N flag will change to a Y flag This is an indicator to both you and the SYSOP that the messages have been read From there you can perform a global kill on all of your messages or the SYSOP can kill them individually NOTE The only way an N flag can get changed to Y flag during a read is that the person who the message is addressed to needs to read it The flag will not change for any other person who reads the message
41. ion MACINTOSH COMPUTERS The MFJ 1287B Starter Pack for the Macintosh computer has the MFJ MULTICOMMAC terminal program that supports multi gray level FAX and color SSTV operation If you have an earlier version of Macintosh terminal program MFJ 1287 please contact MFJ for upgrade information AMIGA COMPUTERS The MFJ 1290 Starter Pack for the Amiga computer has the MulticomAM terminal program and a cable It supports 8 levels of gray in FAX and SSTV mode TERMINAL PARAMETER CHANGES The MFJ 1278 parameters AWLEN and PARITY default values were changed since firmware release 3 3 These changes will affect the upgrade with or without the multi gray level modem Please read carefully AWLEN 8 STOPBITS 1 PARITY NONE 20 MFJ 56A B C Mailbox Memory Pactor Expansion In previous MFJ 1278 firmware releases Releases 2 3 and earlier AWLEN is defaulted to 7 and PARITY is defaulted to EVEN If your computer terminal program parameters are set to match the old MFJ 1278 firmware parameters then you must change the AWLEN and PARITY parameters in your terminal program to AWLEN 8 STOPBITS 1 PARITY NONE Failure to match your computer terminal parameters to the MFJ 1278 terminal parameters will cause the MFJ 1278 to print garbage on the screen or it may cause the computer to lock up MEJ Enterprises has several optional items for the MFJ 1278 1278T These items are listed below OPTIONAL ITEMS AVAILABLE FOR YOUR MFJ 127
42. isplay Multilevel demod 307 154 KHz 1550 Hz 106 53 At this time there will be some numbers scrolling on the computer screen The numbers on the screen will vary from 103 to 110 16 Press the SPACE BAR The MFJ 1278 will display 32 MFJ 56A B C Mailbox Memory Pactor Expansion 2250 Hz 70 35 NOTE This may take a few seconds to appear due to the sampling rate of the MF J 1278 The numbers on the screen again will vary from 65 to 75 17 Press the SPACE BAR The MFJ 1278 will respond DEMODULATOR ALIGNMENT Tune R113 until STA amp CON LEDS ALTERNATE then tune R212 until 10th LED from the LEFT is lit 18 Adjust R113 until the STA amp CON LEDS alternate back and forth This means neither one should stay ON all of the time 19 Then adjust R212 until the 10th LED from the LEFT on the tuning indicator is lit 20 Press the SPACE BAR The MFJ 1278 will respond Tune trimpot indicated until the 10th LED from the LEFT is lit R115 21 Adjust R115 until the 10th LED from LEFT on the tuning indicator is lit 22 Press the SPACE BAR The MFJ 1278 will respond R79 23 Adjust R79 until the 10th LED from the LEFT on the tuning indicator is lit 24 Press the SPACE BAR The MFJ 1278 will respond Tune R114 until the 6th LED from the LEFT is lit 25 Adjust R114 until the 6th LED from the LEFT on the tuning indicator is lit 33 MFJ 56A B C Mailbox Memory Pactor Expansion 26 Press the SPACE BAR T
43. kes the lithium battery out of the circuit If your TNC has a MFJ 2400 modem installed remove it Set it aside it will be re installed later NOTE When removing ICs from your TNC ensure that you do not bend or break any of the pins 4 Using a small flat tip screwdriver remove the following ICs from your TNC U13 74HC4066 U25 NEC 43256 10L or Equiv U22 Z0840004PSC Z80 CPU U23 SYSTEM EPROM 5 Install the ICs which were removed from your TNC in the above step Take note as to the orientation of the IC Match up the NOTCH on the IC to the NOTCH on the IC socket on the expansion board Refer to Figure 2 parts layout diagram for proper installation of the ICs Install the ICs removed from the mother board to the memory board as follows 74HC4066 U13 in socket IC 413 43256 U25 in socket IC 425 Z80 CPU U22 in socket IC 422 A new EPROM with the new firmware is already installed on the expansion board There will be no EPROM installed on the TNC motherboard NOTE The old EPROM removed from the mother board will not be used MFJ 56A B C Mailbox Memory Pactor Expansion MFJ 56 Mailbox Memory PACTOR Expansion Board i Place Z 80 CPU In thls socket with notch as shown Rear of 1278 JMP5 en N um Battery NA ein IN Figure 1 RED 5vb BLU RST B WHT RST C RED BLUWHT Front of TNC 2 1278 Match all ICs with the
44. ls the EDITOR with the contents of the COMM buffer Now the operator still being in MARS receive mode can press a CTRL T to go into transmit mode Pressing the F10 key takes the user into the TEXT EDITOR Using the EDITOR commands take and block off the pieces of traffic which needs to be sent After blocking off the traffic use F9 to send the traffic to the MFJ 1278 to be transmitted The operator will need to perform this operation for each piece of traffic to be sent If all pieces of traffic are all together one right after the other then the procedure will only need to be done once After all the traffic is sent the operator can go back to receive by pressing a CTRL R 27 MFJ 56A B C Mailbox Memory Pactor Expansion The MARsmode Command The MARsmode command provides two levels of MARS compatibility Minimal translation is provided by QSO mode The MFJ 1278 assumes the user is manually sending and receiving Maximum translation is provided for sending and storing files of MARS messages while preserving all of the formatting information using the special MARS ASCII equivalent characters and differs from QSO mode only because of its extra ASCII output translations SSTV OPERATION UPDATE The MFJ 1278 now supports color SSTV and 16 gray level black and white SSTV The following SSTV formats are supported o Robot B amp W 8 12 24 and 36 seconds o Robot Color 36 and 72 seconds o Scotty Color 1 2 o Martin Col
45. mpatible but do not recognize valid AX 25 packets preceded by the TXDIDDLE keyup technique You may recognize the need to set TXDIDDLE OFF if it appears that the station you re working is unable to successfully receive your packets despite your adequate signal 58 MFJ 56A B C Mailbox Memory Pactor Expansion This failure of some TNCs to receive TXDIDDLEd packets may be a result of some software carrier detect schemes All TAPR and derivative TNCs utilizing hardware generated carrier detect receive both TXDIDDLEd and non TXDIDDLEd packets with equal efficiency Note that when TXDIDDLE is OFF TXDELAYC is irrelevant Therefore the actual TXDELAY yielded when TXDIDDLE is OFF is equal to TXDELAY 100ms plus any AXDELAY time 16Levels ONIOFF Mode FAX SSTV Default on Parameters ON The MFJ 1278 will transmit and receive FAX and SSTV in 16 gray levels OFF The MFJ 1278 will transmit and receive FAX and SSTV in 8 or 4 gray levels depending on the setting of the MULTIFAX command In FAX and SSTV modes if 16Levels is ON and 8Levels is OFF MFJ 1278 will receive and transmit FAX and SSTV data in 16 gray levels As in 8 levels 16 levels is effective only when the MULTIFAX is turned ON If MULTIFAX is turned OFF MFJ 1278 is set to transmit and receive in 2 levels FAX and 4 levels SSTV regardless of the setting of 16Levels ON or OFF 16 levels is not supported by the built in printer port of the MFJ 1278 Special terminal program must be used
46. n every time the terminal bell CTRL G rings If the SYSOP does not answer the Mailbox will send the message back to the user saying no answer Below is an example of a typical screen Paging SYSOP any key aborts kk ke de kk kk kk kk ok ek ak kk e kk EN o answer The remote user may abort the SYSOP page by sending packet to the Mailbox If the SYSOP does answer the page then the SYSOP can enter CHAT command then converse one on one with the remote user This concludes the explanation of the commands which are on the Mailbox command line Now lets get into a little of the Mailbox operation If you have any questions about the Mailbox commands we believe they will be answered in this section 41 MFJ 56A B C Mailbox Memory Pactor Expansion MAILBOX OPERATION 1 First establish a connection to the Mailbox station 2 If the Mailbox of the station to which you are trying to connect with is ON then it will answer back with the Mailbox prompt Mailbox Ready nn free n Mailbox B E H elp J K L M R S T gt NOTE The nn free indicates the amount of RAM space available for messages in the Mailbox to which you are connected to The nn will be no higher than 65K if a 512K or a 128K Mailbox is in operation If the Mailbox is 32K then nn will be 32K NOTE The n indicates the memory bank being used for the Mailbox Please refer to the explanation of the M command for the Mailbox in this section Now at this point all of the M
47. n order to conserve RAM space the SYSOP may specify that forwarded messages be killed upon successful forwarding However if conserving RAM is not a concern then forwarded messages will be flagged F This flag will appear in the message flag block Messages with F flags will be saved in the mailbox for the SYSOP s disposition All forwarding events are monitored on the screen in order to inform the SYSOP of the forwarding progress In order for a message to be eligible for the forwarding process two 2 conditions must be met 1 Messages must have N flags in the message flag block 2 All messages must have an callsign in the message header The command used to forward a message is FO All forwards must be done in the stream cmd mode This command is by pressing a CTRL C while in the SYSOP mode Below is a typical example as to how to use the FO command FO CALLSIGN lt CR gt Where CALLSIGN is the callsign of the destination mailbox This callsign must also reside in header of the message to be forwarded The message header can be altered through the Mailbox Edit command Please refer to the EDIT command in this manual When the FO CALLSIGN is issued the MFJ 1278 will initiate a connect request to the destination BBS If the connection is successful the your mailbox will proceed to send the message to the destination BBS Eliciting Reverse Forwards This very unique feature when combined with the hourly automatic forward
48. om around the mounting holes on the outside of the chassis and the inside of the cover This can be done with either light sandpaper or a knife blade This will eliminate any EMI from the TNC caused by the additional large ribbon cable This concludes the installation of the mailbox memory expansion board However before you start putting things back to together double check everything you have already done Final Inspection Before closing up the TNC do a final inspection Please check all of the following 1 Check all connections to ensure that they are all secure 2 Make sure that there are no pins bent or broken on any of the IC s or connectors installed in this procedure 3 Make sure that there are no wires pinched or caught up under any of the screws circuit boards or connectors 4 Lastly give your TNC one last look over for any debris or foreign matter on the main PC If all of the above checks out then you can re install the battery jumper JMP5 Connect the computer cable to the TNC apply power and see if you can obtain the TNC s sign on message If not go back and double check the entire installation procedure If the TNC signed on properly install the cover Reconnect your TNC or multimode to your radio and computer Follow the instructions given by the rest of this documentation to operate your mail box MFJ 56A B C Mailbox Memory Pactor Expansion RAM EXPANSION The RAM on the 32K board can be increased to 128K o
49. ommand C KB4VOL to establish a link with the receiving bbs KB4VOL ABOrt Mode Mailbox Immediate command This command gives the SYSOP total control over the Mailbox by allowing him to force a disconnect on the Mailbox link It immediately terminates any mailbox activity currently in progress You may use it to cancel an erroneous FORWARD or NODEFORW command to eliminate unwelcome mailbox users or at any other time you wish to terminate the mailbox process CHAT Mode Mailbox Immediate command The SYSOP may at any time break onto the mailbox s connected link The resulting mode is like the a typical CONVERS mode packet connection CHAT immediately terminates any user or forwarding operation in progress At the point when the SYSOP invokes Chat mode the SYSOP and the connectee are in an actual packet QSO This is good to discuss problems with the Mailbox or equipment failure CHAT mode continues until the SYSOP returns to command mode REMsysop call n Mode Mailbox Default Blank 53 MFJ 56A B C Mailbox Memory Pactor Expansion Parameters Call Callsign to be used for Remote SYSOP ops n 0 15 optionally specified sub station ID SSID Entering a callsign here permits the owner of the call to perform sysop functions remotely Sysop functions include editing reading and killing any mailbox message When this parameter is blank the remote user may only read non P messages and messages to or from himself Furthermore he ma
50. onfigure his TNC to perform hourly automatic forwards and reverse forwards REVFlim call n Mode Mailbox Default Parameters Call Callsign of BBS to enable Reverse forwards n 0 15 an optionally specified sub station ID SSID When this parameter is empty the mailbox reverse forwards all of its messages eligible for forwarding to the first SID compatible BBS to elicit a reverse forward with F gt Since this permissive technique is vulnerable to a malevolent operator who might attempt to connect and force your mailbox to forward to him the REVFLIM parameter is provided to limit your mailbox s response to other s reverse forward requests Simply place the callsign of the BBS you wish to enable reverse forwarding to in this parameter to limit remotely initiated reverse forwarding to only that callsign 55 MFJ 56A B C Mailbox Memory Pactor Expansion ADDITIONAL COMMANDS UPDATE The following commands have been added or updated in firmware Release 4 1 ASA Mode Packe ASCIVRTTY AMTOR ASA is an immediate command When invoked the MFJ 1278 will analyze incoming signals such as RTTY ASCH AMTOR and HF packet It will display the result for speed data bits and whether or not the signal is inverted When invoked and the MFJ 1278 has analyzed the incoming signal a message will be generated in the following format lt Speed gt lt Confidence Factor gt lt Data Bit gt lt RXInvert On Off gt ASA will be used in conjun
51. or 1 2 Note that to support 16 gray level SSTV and color SSTV operations a special terminal program such as the MFJ 1289 Multicom for the IBM and compatible computers must be used When using a standard terminal program the MFJ 1278 will support SSTV in 8 12 24 and 36 seconds B amp W Robot formats in 4 gray levels thru its built in printer port The MFJ 1278 can be set to operate SSTV both in Color and 16 gray levels by turning the command 16Levels on and the command 8Levels off If your terminal program does not support 16 gray levels the 16Levels command must be turned off and you must follow the instruction given by your terminal program to operate SSTV If your terminal program does not support SSTV you must follow the instructions given in the main MFJ 1278 manual to operate SSTV thru its built in printer port The TVBreak and RXBright commands have been updated to support the 16 gray levels TVBreak is arranged in the format Sync White Area Gray Area Black Area 28 MFJ 56A B C Mailbox Memory Pactor Expansion ss aa bb cc dd ee ff Zog Shh ii jj kk I mm nn The default TVBreak value is TVB 80 46 47 48 4C 4F 52 54 59 5C 5E 60 63 67 69 The RXBright command has been updated to support the 16 levels gray The new RXBright values are as follows 0 TVB 80 46 47 48 4C 4F 52 54 59 5C 5E 60 63 67 69 1 TVB 80 48 4A 4C 4E 50 52 54 56 58 5A 5C 5E 60 62 2
52. or continuously monitors the channel for pactor packets and for AMTOR call packets that match your AMTOR SELCALL When PACTOR hears your AMTOR SELCALL the TNC enters the a_cmd AMTOR mode in an attempt to complete the link If the link is not established within 30 seconds of entry to AMTOR then the TNC automatically returns to PACTOR mode If the link is established the TNC remains in AMTOR mode for the duration of the connection and for an additional 30 seconds after the link terminates Upon expiration of the 30 seconds the return to PACTOR is accomplished automatically Changeover Type ahead One of the many ways PACTOR resembles AMTOR is the protocol s one way nature Data are transmitted in one direction at a time The calling TNC is initially the Information Sending Station ISS i e the sender The other station is initially the Information Receiving Station IRS To reverse data direction either the sender or the receiver must send the changeover character default Y changeable The changeover character has an affect dependant upon the current state sending or receiving of the TNC If the TNC is currently the ISS the 9 MFJ 56A B C Mailbox Memory Pactor Expansion changeover takes effect when all pending characters are acknowledged by the remote When the TNC is the IRS the changeover takes effect immediately and any characters typed prior to the changeover are queued for immediate transmission type ahead
53. ou This works in conjunction with the Y flag In order to perform a Global Kill first of all of the messages to be killed during this must have the Y flag set in the header Secondly all messages to be killed must have the same callsign as MYMcall K Allows you kill the message in slot nn where nn is a particular slot number Remote users may only kill messages which are addressed only to them or originated by them The local and remote SYSOP can kill any messages depending on the setting of the new command REMsysop Please refer to the REMsysop for more detailed information 38 MFJ 56A B C Mailbox Memory Pactor Expansion L This command allows the remote user local or remote SYSOP to list all messages in the mailbox All of slots which are currently in use will be listed They all will have the slot number flag field the destination callsign originator callsign subject field Also the Mailbox command line will be on the next line This allows the remote user local or remote SYSOP to change memory banks in the mailbox ram The current memory bank is indicated on the mailbox command line The bank will be inside a pair of which will be after the bytes free indicator Below is an example of a typical command line from the mailbox nn free n Mailbox B E H elp J K L M R S T gt Where n is the bank number The bank number will vary from 0 to 7 depending on the size of the expanded memory ram The bank numbers
54. pply to you The MFJ 1278 multi gray level modem board mounts vertically on the right side and it is connected to the mother board by a 20 line ribbon cable 17 MFJ 56A B C Mailbox Memory Pactor Expansion If your MFJ 1278 does not have the multi gray level modem board and you wish to install it contact MFJ Enterprises Inc for information concerning this modem board Multi gray level modem board requires factory installation Without the multi gray level modem board installed in your MFJ 1278 operation of multi gray level SSTV and FAX will not be possible even if you have installed the 4 1 firmware However without the multi gray level board you can still operate 2 level FAX and use other features which are not related to SSTV and multi gray level FAX when firmware 4 1 is installed The following features and commands installed in firmware Release 4 1 are not related to multi gray level FAX and SSTV operation and will function without the multi gray level modem board 1 MAILLED This is the mail waiting indicator using the STA LED to show that you have mail present in your Easy mail mailbox depending on the flag conditions of the existing messages Also if your mail box is turned on 2 RBITMASK In RTTY ASCI receiving you can use the RBITMASK command to set the bit inversion pattern to receive some encrypted signals in RTTY ASCII 3 FIRMRNR Used to control the handling of busy states by the MFJ 1278 4 ASA Automati
55. r or local SYSOP can List messages from the Mailbox In order to do this first the Mailbox prompt must be obtained by either a connection to the Mailbox or through the local SYSOP command Then to List messages from the Mailbox Type L lt CR gt The Mailbox will respond with a list of currently used slots in the following format Slot To From Subject Where Slot column is the number of the slot which the messages are in The lower case t is the Type Flag block The lower case m is the Message Flag block The To column will contain the callsign of the person who the message is addressed to The From column will contain the callsign of the person who left the message The Subject column will contain a brief message title Note that the number of slots for an MFJ 1278 without memory expansion board is 30 For an MFJ 1278 with the memory expansion installed the maximum slots per memory bank is 99 After the Mailbox lists all messages it will issue the Mailbox prompt 44 MFJ 56A B C Mailbox Memory Pactor Expansion nn free n Mailbox B E H elp J K L M R S T gt 6 Anyone who accesses the Mailbox can read messages or which are addressed to him her Also a message which is a addressed to ALL such as bulletins can be read by anyone Messages can be read by two 2 different methods Below are the two methods a This method will allow the remote user local or remote SYSOP to read a group of messages This is only
56. r to 512K For the 128K board you can increase the RAM to 512K This can be done simply by replacing IC424 on the memory board and relocate the jumper at J401 header Refer to Figure 2 and the following chart RAM chips can be ordered from MFJ Enterprises Inc ITEM No RAM TYPE J401 POSITION MFJ 45A 43256LP 10 32K The 2 inside most pins MFJ 45B 431000LP 10 128K The 2 middle pins MFJ 45C 8512LP 10 512K The 2 outside most pins FIRMWARE EPROM UPGRADE There are two versions of firmware EPROM upgrade for both the MFJ 1278 and MFJ 1278T Multimodes One version the MFJ 48 supports standard TNCs without the RAM Expansion Board The other version the MFJ 48B supports the MFJ 1278 T with a memory expansion board and MFJ 1278B BTs Since you have already installed the RAM Expansion Board remember to request the MFJ 48B version when ordering EPROM upgrades for you TNC in the future MFJ 56A B C Mailbox Memory Pactor Expansion MFJ PACTOR This section of this instruction pertains strictly to the PACTOR upgrade feature It will explain the functions and then go through the PACTOR commands Online modes As in packet pactor also contains command and converse modes Please note that switching between them is modelled on the NEWMODE ON procedures in packet To manually switch between modes AC the default CMDCHR or a Break signal takes you to cmd mode and the letter K not CONVerse takes you to converse mode Once
57. res as follows 1 Supports 16 gray level FAX and SSTV Supports transmit and receive color SSTV in real time 3 Supports PACTOR operation Includes Digital Memory ARQ Auto matic On Line Compression and a CW Identifier 4 Supports packet mailbox memory expansion to 32K 128K or 512K 5 Enhanced mailbox that allows separate callsign for the mailbox Mailbox now stays ON during packet connects 6 Other mailbox features are Auto and manual mail forwarding auto and manual reverse mail forwarding remote sysop access sysop paging chat mode mailbox Ctext and much more mailbox features 7 Dedicated Mars mode 8 Improved Automatic Signal Analysis ASA 9 Host mode 10 An echo as sent command is installed to allow echoing of each character to the screen as its being transmit in CW RTTY and ASCII This firmware can be installed in an MFJ 1278 1278T with the MFJ 56A B C expansion board installed or an MFJ 1278B BT The firmware can also be installed in the same units with or without the multi gray level FAX SSTV modem installed It is very important that you read this instruction booklet concerning Release 4 1 before you install the firmware UPGRADE WITHOUT MULTI GRAY LEVEL MODEM If you have purchased the MFJ 48B and installed it in an MFJ 1278 56A B C combination which does not have a multi gray level modem you should be aware that the features and commands related to the use of the multi gray level modem will not a
58. s i e characters other than ASCII CR LF BEL and not between 20 and 7e are monitored or simply discarded The default setting permits monitoring all information packets subject to LCALLS MONITOR MNONAX25 etc When MNONPRIN is OFF information packets containing one or more non printable characters are discarded You may find this command helpful when there are binary transfers on the channel that you d rather not monitor MNONPRIN has no effect on data received during connections 60 MFJ 56A B C Mailbox Memory Pactor Expansion EAS ONIOFF Default OFF Parameter ON Enables Real Time echoing of out going CW RTTY and ASCII text OFF Disables Real Time echoing of out going CW RTTY and ASCII text ECHO AS SENT is basically the same as the EAS in AMTOR but is a separate command from AMTOR This command must be set independently from the AMTOR EAS command When issued from the cmd prompt enables Real Time echoing of out going CW RTTY and ASCII text When EAS is ON and ECHO is OFF real time echoing of all transmitted CW RTTY and ASCII text is enabled COMMAND DEFAULT UPDATE The following command default settings have been changed since the printing of the MFJ 1278 main manual Command New Default Value Old Default Value ASPECT Default 3 Default 2 8BITCONV Default ON Default OFF 61
59. s the current values of TVBreak when n 1 to 9 RXBRight assumes the following TVB values n TVBreak Values 0 TVB 80 46 47 48 4C 4F 52 54 59 5C 5E 60 63 67 69 1 TVB 80 48 4A 4C 4E 50 52 54 56 58 5A 5C 5E 60 62 2 TVB 80 49 4B 4D 4F 5 1 53 55 57 59 5B 5D 5F 61 63 3 TVB 80 4A 4C 4E 50 52 54 56 58 5A 5C 5E 60 62 64 4 TVB 80 4B 4D 4F 5 1 53 55 57 59 5B 5D 5F 61 63 65 5 TVB 80 4C 4E 50 52 54 56 58 5A 5C 5E 60 62 64 66 6 TVB 80 4E 50 52 54 56 58 5A 5C 5E 60 62 64 66 68 7 TVB 80 4F 5 1 53 55 57 59 5B 5D 5F 61 63 65 67 69 8 TVB 80 50 52 54 56 58 5A 5C 5E 60 62 64 66 68 6A 9 TVB 80 51 53 55 57 59 5B 5D 5F 6 1 63 65 67 69 6B Note the larger n is the darker the picture The TVBreak default values are TVB 80 46 47 48 4C 4F 52 54 59 5C 5E 60 63 67 69 TXDIDDLE ONIOFF Mode Packet Default Off TXDIDDLE determines whether or not the MFJ 1278 uses a highly efficient square wave signal in place of flags during the transmitter delay TXDELAY period When TXDIDDLE is ON you may select even smaller TXDELAY intervals because the square wave presents four times as many transitions as TXDIDDLE OFF does for your connectees receive synchronization TXDIDDLE is defaulted to the ON setting to reflect the increased efficiency However there are a number of TNCs on the market which purport to be AX 25 co
60. se by the Mailbox 4 There are two 2 different ways to kill messages The first is give in the example below To kill a message in a particular slot type K lt CR gt Where the is the message number you want to kill The Mailbox will respond with Message deleted nn free n Mailbox B E H elp J K L M R S T gt This is whether or not the message flag is set to an N or a Y Note that the remote users may only kill messages which are addressed them The originator can also kill the message The local SYSOP can kill any or all messages in the Mailbox You can perform a Global Kill on a group of messages which are under the same callsign To perform this two 2 conditions must be met All messages must have been read and the message flag must be a Y 43 MFJ 56A B C Mailbox Memory Pactor Expansion The callsign contained in the MYMcall must be the same as the callsign in the MYcall command If the above conditions are met then all the user must type K lt CR gt This will go out to Mailbox then the messages with the message flags set to Y and all of the proper callsigns will be killed The Mailbox will respond back to the remote user with all message numbers killed during the Global Kill process Also the Mailbox prompt will be given again The bytes free indicator will be updated also The SYSOP either remote or local can do a Global Kill The SYSOP must individually kill any messages 5 The remote use
61. the past second RX n a TX n a RX Sending ack control sig TX Last packet acknowledged MON Received new packet RX Dupe rcvd sending Request control sig TX Received request control MON Received dupe packet RX Info packet missing sending request TX Control sign missing retransmitting MON n a Table 2 1 Led Conditions in PACTOR CW Identifier Should CW identification be required the 1278 supports 8 cw identification modes Seven automatic modes are selected by the bit mapped WIDMODE parameter Bit positions within CWID MODE enable timed cw id cwid n incoming events cwid on outgoing events and any combination of the three for a total of 7 modes The timed mode requires some explanation The counter controlling the transmission of the timed CWID must be initially started at the beginning of each link with either the manual ID command or one of the initial CWIDMODE features selected by CWIDMODE bits 1 or 2 A fully automatic CW ID is achieved by setting CWIDMODE to 3 Reduced levels of automation are selected by other combinations The eighth mode is manual cwid Invoke manual CWID by issuing the ID command 11 MFJ 56A B C Mailbox Memory Pactor Expansion MEJ PACTOR COMMANDS Generally the following commands are only valid when issued at the p_cmd prompt Note that a few of the parameters use the same names as packet commands but the parameters themselves are NOT shared between the different mo
62. tively good conditions while being large enough to avoid pointless speedups during bad conditions 14 MFJ 56A B C Mailbox Memory Pactor Expansion Monitor ON OFF default ON same as a 1278 with MCON off Le MY call callsign When not connected and MONITOR is ON the TNC displays monitored data and connect attempts Your callsign up to 8 chars default MFJPACTR MYSelcall 4 char amtor selcall default MFJJ This is used temporarily NO200 ON OFF PASS nnn PTOver PTSend REtries nn STatus TRace ON OFF TXdelay nn to debug the amtor call detection When integrated with the 1278 this command will go away and PACTOR will find the selcall in ZAMTOR s memory In standalone pactor a message AMTOR call received is displayed default OFF Controls whether 200 baud links are to be discouraged The TNC accomplishes this in two ways 1 Speedups are inhibited and 2 Incoming connect requests are acknowledged for 100 baud NO200 works most effectively when both units are capable of NO200 operation Regardless of the setting of NO200 the TNC complies This ensures connectivity with non MEJ units O lt nn lt 255 default V Same as 1278 Doesnt work for Y Changeover gt see CHOCHAR command gt see Ul command O lt nn lt 255 The number of error cycles tolerated before unilaterally terminating the link Also see WAITDISC Displays debug information See appendix Continuous debu
63. tor gt lt Speed gt lt Data Bits gt lt RXInvert On Off gt A typical result will look like this 80 baud 90 Confidence 75 baud used 7 bits RXInvert Off Once the result is displayed the user can exit ASA signal mode by pressing any key MFJ 1278 will return command prompt without changing the operation mode If the analyzed result is acceptable the user will simply type OK lt CR gt The MFJ 1278 will switch to the analyzed mode display the mode status enter the Converse mode and proceed to receive data In the case of analyzing a 300 baud signal the MFJ 1278 will prompt the user that the signal could be PACKET If this occurs then the user can enter the following command from the cmd prompt OK Packet lt CR gt MEJ 1278 will switch to 300 baud HF packet If the user does not issue the OK Packet command and issues just the OK command because you know that the signal is not packet then the MFJ 1278 will switch to 300 baud RTTY or ASCII depending on how data bits ASA said the signal had in it s analysis If data bits was 5 then ASA will switch the MFJ 1278 into RTTY mode If the data bits were 7 ASA will switch the MEJ 1278 into ASCH mode 24 MFJ 56A B C Mailbox Memory Pactor Expansion If the ASA result is a 100 baud signal the MFJ 1278 will prompt the user that the signal could be AMTOR If this occurs then the user can enter the following from the cmd command prompt OK AMTOR lt CR gt When the OK AMTOR
64. xit the Mailbox and return to command mode The command prompt will indicate the stream you are on The command prompt may look like this Acmd where IA indicates that you are on packet stream A This is the only way the remote users can access your Mailbox If you stay in the SYSop mode then when a user tries to connect to your Mailbox he will a message like this CALLSIGN Busy Disconnected The SYSOP will receive a message like the example below when he is in the SYSOP mode and someone tries a connect connect request CALLSIGN Additional Mailbox Features Other MFJ 1278 mailbox features are as follows Forwarding The MFJ 1278 Mailbox now has the ability to Forward mail to most full service and personal mailboxes This feature allows you to compose your mail on your TNC at your leisure and then Forward the resulting messages for eventual delivery Messages may be forwarded any one of three ways either manually by command or by automatic forward You can either forward messages hourly or by your local full service mailbox s reverse forward request Manual and hourly forwards may proceed through up to eight 8 digipeaters allowing the messages to be forwarded through ROSE switches Also NODE forwarding is can be done too thus allowing 46 MFJ 56A B C Mailbox Memory Pactor Expansion you to forward mail through NETROM THENET and KA NODE switches Please refer to the NODeforw command in this manual I
65. xpressed as 10s of seconds Timeouts on the mailbox apply only to remote users the SYSOP can never time out The mailbox will timeout and discon nect after n 10 seconds of mailbox inactivity Note that the synchronous 10 second clock may cause the timeout to occur as much as 10 seconds before the calculated timeout time So if you want to set your Mailbox timeout to 5 minutes then you set the MTimeout command to 30 which would specify a time out of 300 seconds MY HIerad Mode Mailbox Default Text Any combination of characters and spaces up to 60 characters in length You may use this parameter to generate a customized portion of the tagline your TNC will insert in forwarded messages If MYHIERAD is blank the default portion will read lt mymcall gt It is suggested that you insert your hierarchical address location and zip postal code in this parameter Example MYHIER for N2WX in Sebastian Florida in the Melbourne LAN at zipcode 32958 using NSAUV as the home bbs would be entered like this 51 MFJ 56A B C Mailbox Memory Pactor Expansion cmd MYHIER NS5AUV MLBFL FL USA NA N2WX User Sebastian Z 32958 and the tagline would look like this R 920801 1200 NSAUV MLBFL FL USA NA N2WX User Sebastian Z 32958 8 KILonfwd ON OFF Mode Mailbox Default OFF Parameters ON Messages forwarded out of Mailbox will be killed after forwarding process is complete OFF Default Messages forwarded out of the Ma
66. y only kill messages to or from himself plus any messages of type T raffic This parameter may be reset to the blank no remote sysop state by entering a or amp blanking code RVfalway ONIOFF Mode Mailbox Default ON Parameters ON Initiates forwards and reverse forwards of all forwardable messages OFF Mailbox ignores Forward and NODEforw commands The setting of RVFALWAY s controls whether the TNC will initiate forward events FORWARD NODEFORW in the absence of forwardable messages If OFF the TNC will ignore FORWARD and NODEFORW com mands entered in the absence of forwardable messages When ON the TNC runs the event for the sole purpose of eliciting reverse forwardable messages from the remote BBS TImedcmd Mode Mailbox Default string max 119 chars This string in the TIMEDCMD parameter is executed as a TNC command whenever the minutes register in the time of day clock equals the value in the TIMEDMIN parameter The string is executed when seconds equals one execution is deferred while the user is entering a command 54 MFJ 56A B C Mailbox Memory Pactor Expansion TIMEDMin n Mode Mailbox Default 60 Parameters n 0 60 specifying 1 minute intervals The TIMEDMIN parameter is compared against the minutes register of the real time clock to determine when the TIMEDCMD string is sent to the command interpreter Setting this parameter to 60 disables the feature Combined with the TIMEDCMD string the user may c

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