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Alinco EJ-41U, Инструкция по эксплуатации, Страница: 7 / 29

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3-3-3

 

Echo 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.

3-3-4

 

Flow command

Abbrev. F  default ON  range ON/OFF  example F ON

When ON is selected, as you start input with the keyboard, the received packet display will be
paused. When the input is complete, send ([CR] in command mode or when transmitting the
packet in converse mode)

.

 It separates the TX and RX messages for easier reading of the

messages on the screen. Note that during the pause, if the serial transmitting buffer to the host
is filled, the received packet will be lost.

3-3-5

 

XFLOW command

Abbrev. X   default ON   range ON/OFF  example XFLOW OFF

This is used to select software flow control ON/OFF. ON to enable flow control. Use XOFF(Ctrl+S)
to pause the display, XON(Ctrl+Q) to resume. In OFF position, the hardware flow control is ON
always.

3-3-6

 

AUTOLF command

Abbrev. AU  default ON  range ON/OFF  example  AU ON

When on, it puts a line-feed [LF] code after the carriage return [CR].  This is to match the
parameters of the terminal software such as [CR] RX, [CR]/[CR]+[LF]. The incorrect setting may
result in overwriting of the new message onto the displayed message or if excessive line feeds
occur.

4.

 

Communication related commands (as a wireless modem)

The following will explain communication-related commands, pertaining to the following
categories.

l

 

The basic TX/RX commands

l

 

TX related commands

l

 

RX related commands

l

 

The commands used when you are connected

l

 

The commands used when you are not connected

l

 

Control commands in converse mode

l

 

Monitor related commands

Содержание EJ-41U

Страница 1: ... those communication modes You can explore the exciting world of data communication by yourself 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 withALINCO transceiver DR 135T E The memory of all settings of the unit are retained by the built in lithium battery If they go b...

Страница 2: ... commercially available Connecting to GPS receiver Install the optional 3 5ø stereo plug to the data output line from GPS receiver Insert the modified 3 5ø stereo plug to the DATAterminal on the front of transceiver 1 Description A CPU with 4 KB of built in RAM is used to run the EJ 41U This allows a very compact and affordable data communications board Some of the features of a conventional exter...

Страница 3: ... mainly used to change modes These commands are immediate such as D for Disconnect 2 2 2 To set 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 OFF 2 2 3 To check c...

Страница 4: ...ion request from another station or not 4 4 3 CONVERSE Puts TNC in the converse mode Simply press K to abbreviate 6 2 1 6 2 2 CPACTIME Validates PACTIME feature in converse mode 4 6 4 CR Adds a Carriage Return CR to outgoing packets 4 6 2 CTEXT A hidden command Sets the message that will be sent out when a station connects to you Be advised the memory is shared with the LTXT 4 4 5 DISCONE Sends th...

Страница 5: ...t 8 1 1 RESET Returns TNC to its default parameters This command also resets the back up memories 9 1 2 RESPTIME Sets the transmission delay time of the confirmed packet 4 4 7 RESTART Re starts the TNC 9 1 1 RETRY Set the number of packet retries before disconnecting 4 4 9 SENDPAC Sets the characters that command a packet to be sent 4 6 1 SLOTTIME Sets the interval of generating random numbers in ...

Страница 6: ... following to avoid over flow 1 Do not send XOFF Ctrl S from the host and leave in that state it for a long time Process the display pause in the shortest possible time 2 Do not key input while FLOW command is on without hitting the ENTER key Hit enter key and start the display immediately Or set FLOW off to avoid a pause If the echo command is on both echo and received data will be displayed whic...

Страница 7: ...t will be lost 3 3 5 XFLOW command Abbrev X default ON range ON OFF example XFLOW OFF This is used to select software flow control ON OFF ON to enable flow control Use XOFF Ctrl S to pause the display XON Ctrl Q to resume In OFF position the hardware flow control is ON always 3 3 6 AUTOLF command Abbrev AU default ON range ON OFF example AU ON When on it puts a line feed LF code after the carriage...

Страница 8: ...he callsign is processed as SSID 0 Note that the EJ 41U can transmit a signal without a callsign being entered NO CALL It is illegal to transmit a signal without your identification which is a callsign PLEASE BE SURE TO SET YOUR CALLSIGN FIRST Also if the same callsign is used by different stations club station callsign home and mobile set up etc you will encounter problems Please use a SSID to di...

Страница 9: ...ye pattern of the modulated signals on an oscilloscope 4 2 TX related commands To avoid conflicts with other packets these commands are used to determine how to start transmission They are PPERSIST PERSIST SLOTTIME DWAIT SOFTDCD and TXDELAY Please cross refer relative commands description as they are closely related each other A PPERSIST is OFF Others transmit Others transmit Start transmit DWAIT ...

Страница 10: ...d at the reception side it must be considered to determine the delay period 3 When the TXDELAY period is elapsed the packet data will start transmitting 4 PTT is released when the packet is sent 4 2 1 PPERSIST command abbrev PP default ON parameter ON OFF example PP ON This command selects whether the P PERSIST CSMA system is enabled or not If it s ON it enters the PP CSMA mode It detects the carr...

Страница 11: ... is in LOW position it is considered the channel is in use In 9600 bps mode the EJ 41U always considers the SOFTDCD command channel is in use If this is the case change this parameter to ON position When ON the transceiver can be run with an open or no squelch setting 4 2 5 TXDELAY command Abbrev TX default 50 parameter 0 to 255 Example TX 80 This is to determine the waiting time between PTT on an...

Страница 12: ...ame is received CONNECTED TO followed by destination callsign and its repeater ID if any will appear on the screen and a connection is established Once connected AX 25 protocol enables error free communications If a UA frame is not received it transmits a SABM frame up to a predetermined number of times If a UA frame is still not received the TNC automatically disconnects Enter the destination cal...

Страница 13: ...onnection request frame SABM frame there are frames that require a reconfirmation from the destination The retry will take place if a reply is not received This command sets the time duration between the end of transmission of the reply required signal and the start time of a retry transmission in 1 second When a relay station is involved it automatically waits for a number of relay stations X 2 1...

Страница 14: ...the ON position and you receive RNR frame it does not transmit the packet until you receive another frame from the destination In the OFF position it will transmit the packet regardless of the RNR status This may result in poor communications efficiency by sending packets that will not be received 4 5 Unconnected messages or UNPROTO commands These commands are used when sending packets without bei...

Страница 15: ...lank This text will be beaconed at intervals identified under the BEACON command 4 6 Commands to used while connected In the converse mode characters entered from the terminal will be sent as a packet or sequence of packets to the receiving station These commands are used by the TNC to make those packets When one of the following conditions is satisfied the input characters will be considered as a...

Страница 16: ... command becomes effective in the converse mode The prefix EVERY abbrev E is selected the input characters will be considered as an I frame at every interval identified in the parameter setting The parameter is set in units of 100ms Nothing will be sent if nothing is input during the identified interval If the prefix AFTER abbrev A is selected the packet I frame is sent after the time set when the...

Страница 17: ...o 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 certain frames If set ON and MONITOR is set ON all frames including control frames are monitored If set OFF it monitors only I frames information frames When ON is selected the frame status is shown between The det...

Страница 18: ...itored connected and unconnected When OFF it does not monitor stations that have sent unproto data such as a CQ call 4 7 5 MRPT command Abbrev MR default ON parameter ON OFF Example MR ON This is to determine if you wish to display relay station digipeater information in the header or not If ON is selected the relay list will be shown with OFF excludes such information 4 7 6 TRACE command Abbrev T...

Страница 19: ...EA 0183 compatible output GPS receivers The output data from the Sony system is 9600 bps while most other GPS receivers commonly operate at 4800 bps but some are capable of 9600 The EJ 41U can accept either output rate but you must make the appropriate GBAUD setting 5 3 Data Communication between GPS and EJ 41U l Bit rate 4800 9600 bps selected with GBAUD command l Data length 8 bit fixed l Parity...

Страница 20: ... shown in DMD NEMA or DMS that is selectable with a command The identifier will appear on the later part of the data In the DMD NEMA system it means 35 46 569 in DMS it means 35 46 56 9 E E for East W for west to indicate the longitude 13918458 The longitude in degrees In DMD 139 18 458 in DMS 139 18 45 8 0218 Altitude It indicates the altitude in meters Same as Geoid for NEMA format 004 GPS recei...

Страница 21: ...s The EJ 41U can analyze and re structure this format It starts with GPGGA followed by the numbers They indicate GPGGA Global Positioning System Fix Data String GPGGA 123519 4807 038 N 01131 324 E 1 08 0 9 545 4 M 46 9 M 42 123519 Fix taken at 12 35 19 UTC 4807 038 N Latitude 48 deg 07 038 N 01131 324 E Longitude 11 deg 31 324 E 1 Fix quality 0 invalid 1 GPS fix 2 DGPS fix 08 Number of satellites ...

Страница 22: ...te 01 31 l Month 01 12 l Year in 4 digit These are also shown in UTC l Time zone 13 to 00 to 13 l Time zone 00 to 59 minutes l hh cr LF check sum and end of message 5 4 6 GPRMC One of NMEA 0183 formats Date time latitude longitude moving speed and direction can be detected EJ 41U can analyze and re structure this format The data contains the following information l Starts GPRMC sentence l Hour min...

Страница 23: ...d in Km h l One of 15 characters 0 to 9 A to E NTSMRK command determines this character when EJ 41U is used l A short message up to 20 bites Use NTSMSG command to determine this message l A group code 3 letters with a combination of 0 to 9 A to Z Use NTSGRP command to determine l Status 1 for usable information 0 for non usable information l hh CR LF the check sum and end of PNTS sentence 5 4 8 Ca...

Страница 24: ...e long lat Etc Matches GPSTEXT and the initial YES Renews automatically to LTEXT Data sentence from the GPS GPSTEXT is one of PNTS GPGGA GPSTEXT sentence is restructured GPVTG GOZDA GPRMC YES and automatically up dated in LTEXT NO End of process 5 6 GPS related commands 5 6 1 GBAUD commands abbrev GB default variable parameter 4800 9600 example GBAUD 4800 Determines the GPS port bit rate 4800 for ...

Страница 25: ...transmitted as a beacon at the interval 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 7 LTMON command abbrev LTM default 0 p...

Страница 26: ...he conversion of the GPS data Understandable sentence Restructurable sentence GPGGA GPGGA GPRMC GPRMC GPVTG GPVTG GPZDA GPZDA SONY PNTS SMATC 5 6 10 NTSGRP command Abbrev NTSGRP default none parameter alphanumeric characters up to 3 Example NTSGRP ABC This is to set the group code in order to make PNTS sentence 0 9 A Z can be used The PC software can select and plot only the beacon with the matchi...

Страница 27: ...play 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 K command from the command mode it 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...

Страница 28: ...Example RESET This is used to set all parameters to their default values Use this command if the TNC is operating in an erratic manner or if a return to default settings is desired After using RESET all user settings must be re entered 9 2 Display the parameter status 9 2 1 Display command Abbrev DISP default none parameter character as shown below Example DISP display all This is used to display ...

Страница 29: ...sed in older generation TNCs which did not include the CR before a message 9 3 2 RXBLOCK command Abbrev RX default OFF parameter ON OFF Example RX OFF If ON is selected the ID block with FF is structured on the data from the connected station in converse mode ONLY It is handy when necessary to identify the data connected through the terminal software OFF is default Identified blocks are FF LH LL P...

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