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As mentioned in 2-1, the operational mode is usually “connect mode”. The “cmd:” prompt appears when it is in
the command mode. If it does not appear, use CR or return or Enter key to display it on the screen.

6-2 Converse mode
As briefly mentioned in 2-1, this is the mode to send typed data as a packet. By using the CONVERSE or the K
command from the command mode, the TNC switches to the Converse mode. The TNC also enters the converse
mode when you connect from your station to another station. To return to command mode from the converse mode,
use Ctrl+C.

6-2-1 Converse command
Abbrev. CONV default: none parameter: none
example: CONV

This is to change the mode to CONVERSE mode. The typed data in converse mode will be sent out as a packet.

To return to command mode from the converse mode, use <Ctrl+C>keys.

6-2-2 K

command

Abbrev. K default: none parameter: none
Example: K

This is same as the Converse command. Since this change may be required often, the K is made available as a

shortcut.

6-2-3 8BITCONV command
Abbrev. 8 default ON range ON/OFF
example 8 ON

Sets bit number used in the converse mode. Most terminals in use today use 8 bit ASCII characters.

ON: 8 bit mode is used. For Japanese characters, use this setting.
OFF: 7 bit mode is used.

6-2-4 AFILTER command
Abbrev. AF default $00 range n1 to n4
example AF $05, $1A

Deletes specific characters of character codes in the received packet while connected in the converse mode.

This command may avoid display of illegible characters caused by control commands. The parameters can
support up to 4 characters.
$80 deletes all control codes other than CR and LF
$00 releases filter function.

6-3 Transparent Mode

When the converse mode is used for text communication, some of the control codes such as BS or CR are not

sent. There are also embedded commands to be disregarded by the parameters set for reception mode. The
transparent mode transmits and receives ALL control codes as is. When the TRANS command is sent, the mode
changes from command mode to converse mode.

6-3-1 TRANS command
Abbrev. T default N/A range N/A /T

Use this command to immediately enter the transparent mode. The data typed in transparent mode will be

transmitted as a packet with all control codes. To go back to command mode from the converse mode, do not enter
anything for the time set in the CMDTIME parameter(default 1 second), then within the same time frame set with

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Summary of Contents for EJ-50U

Page 1: ...our area of interest regarding those communication modes You may also find assistance through a local amateur radio club You can explore the exciting world of data communications and we believe that this is a most interesting part of the king of hobbies Amateur Radio APRS is a registered trademark of Bob Bruninga WB4APR Notice This unit should be used with ALINCO transceiver DR 620T E The paramete...

Page 2: ...Reception related commands 15 4 3 1 PASSALL command 15 4 4 Commands for 2way communications being connecte 16 4 4 1 CONNECT command 16 4 4 2 DISCONNE command 16 4 4 3 CONOK command 16 4 4 4 CMSG command 16 4 4 5 CMSGDISC command 16 4 4 6 RESPTIME command 16 4 4 7 FRACK command 17 4 4 8 RETRY command 17 4 4 9 TRIES command 17 4 4 10 CHECK command 17 4 4 11 FIRMRNR command 17 4 4 12 CONSTAMP command...

Page 3: ...otes for NMEA 0183 25 5 5 Details of GPS data processing 26 5 6 GPS related commands 26 5 6 1 GBAUD command 26 5 6 2 LPATH command 27 5 6 3 LOCATION command 27 5 6 4 LTEXT command 27 5 6 5 LTMON command 27 5 6 6 LTMHEAD command 27 5 6 7 GPSTEXT command 27 5 6 8 NTSGRP command 28 5 6 9 NTSMRK command 28 5 6 10 NTSMSG command 28 5 6 11 GPSSEND command 28 6 Function modes 28 6 1 Command mode 28 6 2 C...

Page 4: ...on 32 8 3 UI digipeat related commands 32 8 3 1 UICHECK command 32 8 3 2 UIDWAIT command 32 8 3 3 UIDIGI command 33 8 3 4 UIFLOOD command 33 8 3 5 UITRACE command 34 8 3 6 UISSID command 35 8 3 7 NPATH command 36 8 3 8 SPATH command 37 8 3 9 EPATH command 37 8 3 10 WPATH command 37 9 Multi connect function 37 9 1 Multi connect related commands 37 9 1 1 USERS command 37 9 1 2 STREAMSW command 37 9 ...

Page 5: ...time setting and display set 42 11 3 1 DAYTIME command 42 11 3 2 DAYUSA command 42 11 3 3 DAYSTAMP command 43 11 4 RAM check command 43 11 4 1 RAMTEST command 43 1 Description The communication protocol of this unit is compatible with AX 25 version 2 Level 2 This enables a reliable connection with CRC check and the re try function It is also capable of transmitting without being connected to a nod...

Page 6: ...Commands These are mainly used to change modes These commands are immediate such as D for Disconnect 2 2 2 Setting parameters Type the command parameter name Enter a space after the parameter name and type the new value Press CR to enter The screen will show XXX was YYY XXX stands for the parameter YYY for the previous value If the parameter setting is ON OFF use the Y key for ON N key to select O...

Page 7: ...lly 4 4 4 CMSGDISC CMSGD OFF ON OFF When another station connects a message is sent and the other station is then disconnected automatically 4 4 5 CONMODE CONM Convers Cconvers Trans Automatically selects either Converse or Transparent mode when connection occurs NOMODE should be OFF 6 4 2 CONNECT C N A Call VIA Call1 call2 call8 Request a connection after VIA if using digi peaters eg C KW1KW or C...

Page 8: ... after packets are digipeated through your station 8 1 3 ID I N A N A Transmits ID immediately 8 1 4 KILL KI ON ON OFF Deletes Messages on the message board 10 2 6 KISS KISS OFF ON OFF TNC will enter the KISS mode after the next boot up 6 5 1 LCSTREAM LCS ON ON OFF Allows lower case letter to be used after stream switch command is sent 9 1 4 LIST LI N A N A Displays all messages except private mes...

Page 9: ... PACTIME PACT AFTER 10 EVERY AF TER n 0 250 The interval time until automatic packet transmission after keyboard input stops in 100ms units 4 6 5 PARITY PAR 0 0 3 Sets the parity check system 3 2 3 PERSIST PE 128 0 255 Sets the CSMA P persistent probability 4 2 2 PPERSIST PP ON ON OFF Selects P Persistent CSMA 4 2 1 RAMTEST RAMTE ST N A N A RAM check after RAM clear Immediate 11 4 1 READ R N A n n...

Page 10: ... processing of packets being digipeated Decrements count in sequentially repeated packets 8 3 4 UISSID UIS OFF ON OFF Determines if a special process is required when matching UI frames to the default 8 3 6 UITRACE UIT N A Name Determines the relay of UI packets and MYCALL is not on the source list or on the relayed station list Decrements count of sequentially repeated packets 8 3 5 UNPROTO U CQ ...

Page 11: ... command Abbrev E default ON range ON OFF example ECHO OFF This is used to set the echo back of characters input from the host ON for echo back OFF for none This is compatible to terminal software s local echo setting If this is not matched properly the characters may be displayed twice or the characters may not be seen at all 3 2 5 FLOW command Abbrev F default ON range ON OFF example F ON When O...

Page 12: ...verse mode Monitor related commands 4 1 The basic TX RX commands Check these commands if the unit does not transmit 4 1 1 HBAUD command Abbrev HB default 1200 parameter 1200 9600 example HBAUD 9600 HB1200 This is to determine the speed of transmitted data If 1200 is set it enables AFSK at 1200bps At this position the modulated signal is output from the T1200 29th pin on the gate array but there is...

Page 13: ...smit DWAIT DWAIT 1 2 DWAIT As another station stops transmission DWAIT starts counting While it is counting another station starts transmitting it stops counting When this occurs you cannot transmit 1 DWAIT If no signal is received during the entire DWAIT period The TNC starts to transmit B PPERSIST command is ON Others transmit Start transmit Slot time Slot time 1 2 3 4 5 blank blank hit It s lik...

Page 14: ...lect the parameter of the P Persistent CSMA random code hit probability as previously described If the higher number is set the chance to hit increases but the potential conflict with others also may increase If you set the value lower the risk of conflict decreases but you cannot transmit a sequence of packets rapidly 4 2 3 SLOTTIME command Abbrev SL default 3 parameter 0 to 255 example SL 5 This...

Page 15: ...ou are using digipeaters the parameter can remain set at the default value 0 4 2 8 AXHANG command Abbrev AXH default 0 range 0 250 example AXH 10 Sets time for voice repeater hang squelch tail timing However this parameter MUST be set a little shorter than the actual hang time of the repeater The unit is in 100mSeconds While the repeater is in hang mode it is still operating thus it is not necessa...

Page 16: ... As shown you should add the SSID as needed You may also include a relay stations callsign in case you cannot connect directly to the other station In this case you can add VIA or V followed by the relay stations callsigns Up to 8 stations can be specified for the relay s The last example shows that you are going to connect K6ANC 1 using K6ANC 2 and K6ANC 3 as relay stations Remember that the EJ 5...

Page 17: ...e maximum number of retries When the maximum number of retries exceeds the parameter retry count exceeded DISCONNECTED appears on the screen and the TNC returns to the disconnected state The conventional TNC AX 25 protocol may transmit a SABM frame at this point and the RELINK command default OFF is available to set this option The EJ 50U does not have this parameter fixed at OFF position 4 4 9 TR...

Page 18: ...ON and BTEXT so that they may be used as secondary beacons 4 5 1 UNPROTO commands Abbrev U default CQ parameter destination s callsign with up to 8 with using VIA example U CQ U APRS V RELAY WIDE This is used to designate relay station for your unconnected transmission 4 5 2 BEACON command Abbrev B default EVERY 0 parameter EVERY AFTER 0 250 Example B E 6 This is to set the timing of the transmiss...

Page 19: ...LF default OFF range ON OFF example LF ON Selects adding LF code after CR code on I frame of sending packet ON LF code is added OFF LF code is not added 4 6 4 PACLEN command Abbrev P default 128 parameter 0 255 Example P 78 When the number of input characters bites to be exact reach this parameter the data will be considered as a complete packet I frame and sent 4 6 5 PACTIME command Abbrev PACT d...

Page 20: ... Abbrev M default ON parameter ON OFF Example M ON This is used to monitor packet communications or not If ON is selected you will see your messages and other traffic on the monitored frequency including unproto traffic If OFF is selected you will only see packets addressed to your station 4 7 2 MCOM command Abbrev MCOM default OFF parameter ON OFF Example MCOM ON This sets the TNC to monitor cert...

Page 21: ...ter ON OFF Example TRACE ON When ON it will display all the details of the frame The left side block shows frames in 16 digit codes The right side block shows them in ASCII codes The display system may differ from that of a conventional TNC when the EJ 50U is used 4 7 8 MSTAMP command Abbrev MS default OFF range ON OFF example MS ON When On adds date time on the monitored frame header ON When the ...

Page 22: ...he CPU s GPS SEL terminal 80th pin determines the default When GPS SEL terminal is in H position 9600 bps becomes the default GPS SEL terminal is in L position 4800 bps becomes the default The status of this pin will be checked when the RESET command is executed or RAM back up is not present It does not effect the speed when the system is working properly or when the RAM back up is done with the c...

Page 23: ... shows the status of the satellites received in channels 1 to 8 to receive data Each 5 letters defines 1 channel The first letter shows the satellite number 2nd shows the elevation angle the 3rd shows direction angle 4th shows channel status and 5th shows the signal level of each satellite D The status of the internal oscillator of the GPS receiver DH not related to the user 1 DMS DMD identifier L...

Page 24: ... means ground speed unit in Km hh CR LF check sum and end of message 5 4 5 GPZDA One of NMEA 0183 formats It contains date and time information only EJ 50U can analyze and re structure this format The data contains the following information GPZDA starts GPZDA sentence Time minutes seconds in UTC Date 01 31 Month 01 12 Year in 4 digit These are also shown in UTC Time zone 13 to 00 to 13 Time zone 0...

Page 25: ...initial and ending P the check point registration A check data when the automatic position transmission is set OFF R check data when the course data or check point data is received Dd mm yyyy hh mm ss Date and time indication Latitude in DMD followed by N or S Longitude in DMD followed by E or W Direction Shown with the number 360 degrees divided by 64 00 stands for true north 16 for east Speed in...

Page 26: ...PS receiver The following flowchart explains how the LTXT is automatically updated when a line of GPS data is received GPS inputs a line of data GPSFILTn is empty or the input Matches one of GPSFILTn data The data is one of SONY SMAIC GPGGA YES GPVTG GPZDA GORMC No No check sum OK Analyze GPS data such as date time long lat Etc Matches GPSTEXT and the initial YES Renews automatically to LTEXT Data...

Page 27: ...set with the location command Nothing will be transmitted if the LTEXT buffer is empty Use to empty the buffer By using the LTEXT command you can manually insert text to be beaconed The LTEXT buffer can also be filled automatically by specifying a GPS output string using the GPSTEXT command and connecting a GPS unit 5 6 5 LTMON command Abbrev LTM default 0 parameter 0 250 example LTMON 5 The LTEXT...

Page 28: ...3 This is to set the marking code for the PNTS sentence 5 6 10 NTSMSG command Abbrev NTSMSG default none parameter small character up to 20 letters Example NTSMSG this is a test This is to set the message used in PNTS sentence 5 6 11 GPSSEND command Abbrev GPSS default none parameter up to approx 240 characters Example GPSSEND SKB SKB is used to set IPS 5000 s measurement zone as Tokyo See your GP...

Page 29: ...ode Most terminals in use today use 8 bit ASCII characters ON 8 bit mode is used For Japanese characters use this setting OFF 7 bit mode is used 6 2 4 AFILTER command Abbrev AF default 00 range n1 to n4 example AF 05 1A Deletes specific characters of character codes in the received packet while connected in the converse mode This command may avoid display of illegible characters caused by control ...

Page 30: ...c mode change is not activated OFF Activate automatic mode change Set parameters using CONMODE and NEWMODE commands 6 4 2 CONMODE command Abbrev CONM default CONVERS range CONVERS TRANS example CONM C Selects either converse or transparent mode as designated when a connection occurs C or CONVERS To enter to converse mode T or TRANS To enter to transparent mode 6 4 3 NEWMODE command Abbrev NE defau...

Page 31: ...and TNC can function as a digipeater The detail of UI frames are also explained in this chapter 8 1 Digipeat related commands 8 1 1 DIGIPEAT command Abbrev DIG default ON range ON OFF example DIG ON Selects the desired Digipeat mode ON It functions as a digipeater If the MYCALL or MYALIAS parameter is contained in the digipeat route data received the packet is relayed OFF The digipeat mode is deac...

Page 32: ...mes called callsign substitution Your station will not digipeat packets it originated but will digipeat calls in the specified list and then replace them with your call When there is MYCALL in the relayed list the content won t be relayed by your station again UIFLOOD UITRACE command feature The relay steps can be restricted with using callsigns of digipeater list in UIFLOOD UITRACE commands This ...

Page 33: ...me UIFLOOD relay won t become effective if Name is empty To intentionally remove a Name enter Name as n part will be disregarded regardless of the parameter This is to communicate with other manufacturers UIFLOOD command Other manufacturers n in UIFLOOD command is similar to the UICHECK command in this TNC When ID is set the frames that match all of the below conditions will be relayed When it is ...

Page 34: ...WIDE4 3 Frame 2 W1BBB GPS W1CCC WIDE4 2 Frame2 W1BBB GPS W1CCC WIDE4 1 Frame 3 W1BBB GPS W1CCC WIDE4 Frame3 Note that Y SSID changes from 1 to 0 W1BBB GPS W1CCC WIDE4 Frame4 This in not Name X Y parameter Y is 0 thus wont be relayed in UNFLOOD command W1BBB GPS WIDE Frame5 Same reason as above no relay W1BBB GPS TRACE4 4 Frame6 This does not match Name so no relay 8 3 5 UITRACE command Abbrev UIT ...

Page 35: ...within the UICHECK command set time UISSID command is on Sender s SSID is 1 7 No unrelayed station in the relay route Relay modification process Sender s SSID is reduced by 1 After such reduction results 0 you have become the last relay inserts MYCALL setting callsign with a relayed flag When you are the first relay inserts MYCALL setting callsign with a relayed flag Example UISSID ON MYCALL W1AAA...

Page 36: ...o unrelayed station in the relay route Relay modification process Sender s SSID remain unchanged Only the first relay station digipeated will remain rest of relayed stations will be deleted MYCALL setting callsign will be inserted with relayed flag Adds relay station list according to the parameter SSID 12 Relay station list set at NPATH command 13 SPATH 14 EPATH 15 WPATH more than 8 stations incl...

Page 37: ...s in excess of 8 station won t be added Even if WPATH is empty the relay with UISSID takes place but without adding the relay route Enter to intentionally clear the value 9 Multi connection features In this chapter the multiple connection up to 10 stations will be explained 9 1 Multi Connect related commands 9 1 1 USERS Command Abbrev US default 1 range 0 10 example US 10 This command sets the max...

Page 38: ...eature Messages sent from other stations will be saved in the TNC Messages can be sent to the TNC even when a PC is not active This chapter explains Setting commands Operation commands for system operator LEDs related to message board and operations for the users The capacity of the mailbox is 110kb 10 1 Setting commands for Message board 10 1 1 MBOD command Abbrev MB default OFF range ON OFF exam...

Page 39: ... disabled 10 1 6 EXTCLR command Abbrev EXTC default None range none example EXTC This command clears all MB memories 10 1 7 LOG command Abbrev LOG default None range None example LOG The latest 18 stations connected to MB will be displayed as a list In addition the connected time will be shown if the DAYTIME command is activated The RESTART command or turning off the power deletes the list 10 2 Me...

Page 40: ...lete 10 messages in order of younger message numbers KI as above in order of older numbers 10 3 Message Board related LED Message Board LED indicates the following status and relative commands are explained here 10 3 1 MBODLED terminal It illuminates when someone is connected to MB 10 3 2 MAILLED terminal When a message arrives in your MB and MAIL command explained later is ON LED lights up 10 3 3...

Page 41: ...o display the next 20 10 4 5 L command LIST Abbrev None default None range None example L Displays ALL messages except those sent from other stations to other stations 10 4 6 R command READ Abbrev None default None range None example R To read a specific message use as R 1 10 4 7 A command ABORT Use this command to pause reading 10 4 8 J command JUST HEARD Abbrev None default None range None examp...

Page 42: ...display all This is used to display the parameter settings in full or in part DISP displays all parameter settings DISP A displays COM port related parameters DISP C displays special characters related parameters DISP H displays hellscounter related parameters DISP I displays ID related parameters DISP L displays link related parameters DISP M displays monitor related parameters DISP T displays ti...

Page 43: ...formation is transmitted OFF disables the function 11 4 RAM check command 11 4 1 RAMTEST command Abbrev RAMTEST default None range None example RAMTEST The RAMSET command clears the RAM then checks and displays available memory capacity and error address To exit turn off the power Information functions and features subject to change without notice or obligation End of Document ...

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