Advanced Electronic Applications PK-88, Operating Manual

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Page 2: ...NIC APPLICATIONS INC Rev D 3 90 PROPRIETARY INFORMATION Reproduction dissemination or use of information contained herein for purposes other than opera tion and or maintenance is prohibited without wr...

Page 3: ...ommands to the PK 88 This means that some of the sections of the PK 88 Manual that tell you to enter a command in a certain manner will not apply When using one of our programs on your computer sectio...

Page 4: ...ion which can be determined by turning the PK 88 on and off the user is encouraged to try and correct the interference using one or more of the following measures Reorient the antenna of the device re...

Page 5: ...ldwide This manual is your guide into the realm of Amateur Packet Radio Join a Packet Club Subscribe To Newsletters Join a Voice Net Join a packet radio club they exist in all states as of this writin...

Page 6: ...2 2 3 Computer Connections 2 2 18 2 3 Controls and Indicators 2 3 19 2 4 Status LEDs 2 3 19 2 5 Serial Port Configuration 2 3 19 2 6 Screen Displays 2 3 19 2 6 1 Echoes 2 4 20 2 6 2 Line Feeds and Car...

Page 7: ...9 35 2 13 1 Data Carrier Detect DCD Requirements 2 20 36 CHAPTER 3 BASIC OPERATION 3 1 Exploring the PK 88 Program 3 1 37 3 2 LED Status and Mode Indicators 3 1 37 3 2 1 Status Indicator LEDs 3 1 37 3...

Page 8: ...nections 4 7 54 4 5 3 Are You Available to Chat 4 8 55 4 5 4 Do You Want to Transmit 4 8 55 4 6 Digipeater Details 4 8 55 4 6 1 Are You a Digipeater 4 9 56 4 6 2 Do You Want to be a Digipeater 4 10 57...

Page 9: ...2 5 Sample Session The Caller s Point of View 4 24 71 4 12 5 1 Connect and Logon 4 24 71 4 12 5 2 LIST Messages 4 24 71 4 12 5 3 READ Messages 4 25 72 4 12 5 4 KILL Messages 4 25 72 4 12 5 5 SEND Mess...

Page 10: ...CANLINE 5 17 92 CANPAC 5 18 93 CASEDISP 5 18 93 CBELL 5 19 94 CFROM 5 19 94 CHCALL 5 20 95 CHDOUBLE 5 21 96 CHECK 5 21 96 CHSWITCH 5 22 97 CLKADJ 5 22 97 CMDTIME 5 23 98 CMSG 5 23 98 COMMAND 5 23 98...

Page 11: ...45 120 MDMON 5 45 120 MDPROMPT 5 45 120 MEMORY 5 46 121 MFILTER 5 46 121 MFROM 5 46 121 MHEARD 5 47 122 MONITOR 5 48 123 MONITOR ON OFF 5 49 124 MPROTO 5 49 124 MRPT 5 49 124 MSTAMP 5 50 125 MTO 5 50...

Page 12: ...6 1 143 6 2 General Tests 6 1 143 6 2 1 Power Supply 6 1 143 6 2 2 Obvious Problems 6 2 144 6 2 3 Assembly Problems 6 2 144 6 2 4 Cabling Problems 6 2 144 6 3 Specific Symptoms 6 2 144 6 3 1 Symptom...

Page 13: ...IX C TTL HEADER INSTALLATION INSTRUCTIONS C 152 APPENDIX D SCHEMATIC DIAGRAM PARTS PICTORIAL D 154 APPENDIX E SPECIFIC RADIO CONNECTIONS E 156 APPENDIX F PK 88 REVISION SUPPLEMENT 16 MAY 89 F 159 APPE...

Page 14: ...l The PK 88 provides all decoding encoding and transmitter control routines needed to send and receive Packet Radio You can use your computer or any ASCII data terminal with the same communications pr...

Page 15: ...be used Hardware HDLC Zilog 8530 SCC 1 2 4 Input Output Connections Radio Interface Eight pin microphone connector Input Output Lines Receive audio Transmit audio Push To Talk PTT External squelch inp...

Page 16: ...cations program or terminal emulator Data and control signals are exchanged between the PK 88 and the computer or terminal at standard RS 232C CCITT V 24 V 28 levels Your computer and terminal program...

Page 17: ...les and connectors be made with the best commercial quality shielded materials and that careful and correct grounding and bond ing procedures be observed in the installation of the radio equipment bei...

Page 18: ...not connected Table 2 1 J2 Radio Port Connector 2 2 3 Computer Connections See Table 2 2 NOTE The serial interface in the PK 88 comes from the factory configured for RS 232C voltage levels Please see...

Page 19: ...one stop bit Your computer will probably accept the PK 88 s default setting even if it actually uses a dif ferent setting If your computer requires eight data bits you may have to set parity to none...

Page 20: ...or CR LF to your terminal when 80 characters have been displayed on a line The screen width default value is 80 the width of most CRT displays If your computer does not automatically break long lines...

Page 21: ...the PK 88 is doing its auto baud routine It measures your com puter s data rate digital word length parity and then sets itself accordingly The PK 88 automatically scans baud rates of 300 1200 2400 4...

Page 22: ...instal lation and you are ready to begin operating 21 If you have problems with the steps shown above return to Step 1 AFTER checking all cables and connectors Read each step again carefully If you s...

Page 23: ...the PK 88 to your ra dio In this method the PK 88 is connected directly to the radio initial tests are performed with out making any adjustments in the radio or adding any signal level balancing devic...

Page 24: ...ect the PK 88 and FM radio as shown below in Figure 2 1 3 Apply power to your computer and PK 88 and start your terminal program 4 Connect the radio to a dummy load be prepared to monitor your transmi...

Page 25: ...z peak With stand ard pre emphasis most transmitters will produce approximately 2 5 kHz deviation on the lower Mark Stop tone Excessive deviation is likely to cause decoding errors at the receiving st...

Page 26: ...tor to either USB upper sideband or LSB lower side band Because Packet Radio uses NRZI data on the radio link the sideband used does not affect the data sense or polarity However the radio s tuning ca...

Page 27: ...tely fifty percent 50 of the manufacturer s rated full power read ing EXAMPLE If the radio s output device current specification for CW operation is 200 mA set the AFSK Output Level control and your m...

Page 28: ...hronous Port Parameters cmd disp a 8BITCONV OFF Strip bit 7 in CONVERSE ACRDISP 80 Screen width AFILTER OFF Never send MFILTER characters to radio ALFDISP ON Send LF after CR to terminal AWLEN 8 Data...

Page 29: ...ds a packet START 11 CTRL Q Resume sending data to terminal STOP 13 CTRL S Stop sending data to terminal TIME 14 CTRL T Insert send time in text XOFF 13 CTRL S Stop sending data to terminal XON 11 CTR...

Page 30: ...Maximum number of frame repeats SQUELCH OFF Select receiver squelch polarity TONE 3 1200 2200 eq Bell 202 modem tones equalizer ON TRIES 0 Show or force retry count USERS 1 Maximum multiple connection...

Page 31: ...as you type them and a RETURN to start stop or activate a specific PK 88 func tion Like all other PK 88 commands the immediate commands can be typed with a short mne monic or abbreviated form See the...

Page 32: ...d inside the Macintosh Use a shielded serial cable and connect both pins numbered 1 to the shield Connect pin 1 at the Macintosh end to the main ground on the computer 2 11 2 Commodore 64 64C 128 VIC...

Page 33: ...nstructions for connecting a modem and connect the PK 88 the same way The PK 88 is configured as Data Communications Equipment DCE the technical term for an RS 232C modem Most computers and terminals...

Page 34: ...n on which the computer RECEIVES data must be connected to the PK 88 s connector pin 3 If your computer requires any other signals you must arrange to provide them The docu mentation provided with you...

Page 35: ...s and True Compatibles AEA s PC PAKRATT will work with the PK 88 and the IBM PC AT and true compatibles There are also many commercial shareware and public domain communications and ter minal programs...

Page 36: ...AWLEN 8 HPOLL OFF AX25L2V2 ON KISS ON CANLINE 00 PARITY 0 CANPAC 00 PPERSIST ON CHSWITCH 00 RAWHDLC ON DELETE OFF START 00 ECHO OFF STOP 00 FLOW OFF TRACE OFF NEWMODE OFF XON 00 NOMODE ON XOFF 00 PAR...

Page 37: ...nks when the MailDrop has message snot yet read by the owner MYCALL CON Connected Lit when valid connect state exists MULT Multiple Lit when multiple connection exists or blinks when the receive buffe...

Page 38: ...rrect your typing mistakes or cancel the line completely before you type the final of your command o See Chapter 3 8 for a discussion of line editing 3 3 2 Command Responses Whenever the PK 88 accepts...

Page 39: ...command name as well as the default value For example n means that the command takes a nu merical parameter value 3 3 5 Default Values Most commands have initial values that the PK 88 assumes as defa...

Page 40: ...se which set special charac ters in hexadecimal format Here is a brief explanation of hex numbers The digits of a hex number represent powers of 16 in the same manner as the powers of 10 represented b...

Page 41: ...CT call1 VIA call2 call3 call9 The CONNECT command requires a string argument call1 You may include the keyword VIA followed by a list of from one to eight call signs call2 through call9 Multiple call...

Page 42: ...Command Mode prompt tells you that the PK 88 is waiting for you to issue a com mand Anything you type after this prompt is read as a command to the PK 88 If a moni tored packet is being shown the pro...

Page 43: ...ou did not type enough arguments for a command that expects several parameters need ALL NONE YES NO You did not type the arguments needed for CFROM DFROM MFROM and MTO too many You typed too many argu...

Page 44: ...ect request but the acknowledgment from the distant station has not been received If you type the DISCONNE command again the PK 88 is disconnected im mediately Link state is FRMR in progress The PK 88...

Page 45: ...other station The PK 88 rejects connect requests if CFROM is set to NONE or if you are already con nected to another station FRMR sent xx xx xx The PK 88 is connected but a protocol error has occurre...

Page 46: ...mand default 80 formats your computer s screen display A CR or CR LF sequence when ALFDISP is ON is sent to your computer at the end of a line when n characters have been displayed o If your computer...

Page 47: ...E character as a special command prefix These terminals change display functions depending on the characters that follow the ESCAPE key o If your computer presents this problem set ESCAPE to ON o See...

Page 48: ...ry chapter along with a full description of each command The PK 88 automatically enters the Command Mode when you first apply power If you have been in any other mode type C followed by a The PK 88 an...

Page 49: ...C7XJ If you do not specify the SSID extension the PK 88 retains its default value of 0 zero and the SSID is not displayed You must specify the SSID to connect to a station with a SSID other than 0 or...

Page 50: ...ent Mode CMD Command Lit when in the Command Mode SEND Send Lit when PTT line is active DCD Data Carrier Detect Lit when valid data signals received STA Status Lit when unacknowledged frames exist Bli...

Page 51: ...sion not an ASCII character your keyboard may have it If CTRL C interferes with or stops your terminal program and you cannot send the BREAK signal change the character that returns you to Command Mod...

Page 52: ...C to verify that you are in Command Mode Type CONNECT WX1BBB after the cmd prompt After a moment you should see cmd connect WX1BBB CONNECTED to WX1BBB You have begun your first Packet communication T...

Page 53: ...at station and the demodulator and receiver of the other station o Experiment with the TXDELAY timing parameter for the sending TNC o Set TXDELAY to 60 for a long delay If this solves the problem decr...

Page 54: ...if call requests are accepted or rejected which calls are accepted and which are rejected You can also use synonyms CONOK ON and CONOK OFF in place of CFROM ALL and CFROM NONE CFROM has four argument...

Page 55: ...wering machine The PK 88 automatically sends the CTEXT message to each station that connects to your system The CTEXT message can be any text string up to 120 characters You can include CR s by prefix...

Page 56: ...our station to the station with which you wish to connect 4 6 1 Are You a Digipeater Your station can be a digipeater for other stations You do not have to do anything Your PK 88 digipeats other stati...

Page 57: ...f up to eight stations whose packets will not be repeated Type DFROM to display the ALL NONE YES list NO list status of station call signs whose packets will or will not be repeated You can use the ab...

Page 58: ...under special conditions such as an emergency communications channel or a marginal HF channel you can set RETRY to 0 zero to disable all automatic disconnects Please use this zero value infinite retr...

Page 59: ...splayed with the packet header containing the sending station s call sign and the destination 4 8 2 Monitoring Digipeaters The MRPT Command Set RRPT ON to see any digipeater stations being used This f...

Page 60: ...s 4 9 1 The MFROM Command MFROM uses arguments to determine how the PK 88 monitors packet channels and dis plays information which stations packets will be displayed and which stations packets will be...

Page 61: ...all cmd mt MTO yes WX1AAA WX2BBB WX3CCC WX4DDD o To stop display of all packets type MFROM NONE and MTO NONE This has the same effect as setting MONITOR to 0 zero o To display packets only to one or m...

Page 62: ...giving the ASCII character codes in either hexadecimal or decimal numbers The default value of 80 hex filters all received control characters except M the carriage return J the line feed and I the TAB...

Page 63: ...updated continually as long as power is applied The clock is not set when the PK 88 is turned on The DAYTIME command will display the following error message cmd daytime clock not set You must reset t...

Page 64: ...KSPACE key If your terminal lacks BACKSPACE set DELETE ON to erase characters with the DELETE key set DELETE OFF to use the BACKSPACE key You will probably want to use the same key your computer norma...

Page 65: ...u send it all at once 4 10 7 More Carriage Returns and Line Feeds If the send packet character is set to you will probably want the to be included in the packet for display at the other end If you set...

Page 66: ...on CHSWITCH selects the character used to change channels in multiple connect operation The value n 0 to FF 0 to 255 decimal specifies the desired character o CHSWITCH characters must not be channel n...

Page 67: ...ter you are connected you can tell who s talking to you by 0 WX1AAA Hi Ralph 1 WX2BBB Long time no see 6 To talk with WX1AAA in Converse mode type 0 Hello Charlie To talk with WX2BBB do the same thing...

Page 68: ...n Type MDCHECK or MDC to verify that you have local control MDCHECK is an immediate command with which you can log on to your own MailDrop just as a calling station would Once logged on to your MailDr...

Page 69: ...n a caller is not connected to your MailDrop channel activity is monitored in nor mal fashion according to the setting of MONITOR 4 12 3 Caller Prompt MDPROMPT text is the message prompt sent to a cal...

Page 70: ...DAYTIME must be set for the Date and Time to appear Your MailDrop does not use message titles The MailDrop LIST command displays ALL message numbers regardless of sender or addressee 4 12 4 4 R n REA...

Page 71: ...ple Session The Caller s Point of View Let s see what the MailDrop looks like to a calling station Let s assume that your call is WX1AAA and that you wish to connect and log on to WX2BBB s MailDrop sy...

Page 72: ...AEA PK 88 6270 B K L R S The MailDrop s prompt Now type K to KILL one specific message in the MailDrop K 6 Type the KILL 6 command Done The MailDrop s confirmation AEA PK 88 6270 B K L R S The MailDr...

Page 73: ...your message The MailDrop won t let you AEA PK 88 6336 B K L R S The MailDrop is ready again 4 12 5 7 Multiple Message Commands You see that the MailDrop has more than one message for you so you try t...

Page 74: ...the MailDrop B Type the Bye Bye command The MailDrop issues an immediate disconnect command to your PK 88 and the connec tion is over DISCONNECTED Your PK 88 s status line 4 12 6 Sample Session The M...

Page 75: ...PK 88 6270 B K L R S K 6 Done AEA PK 88 6468 B K L R S S WX2BBB Enter message Z CTRL Z to end YEAH I GOT THE MAILING AND WILL BE GLAD TO PICK YOU UP WHAT TIME DO YOU WANT ME THERE IS MARY GOING CUL WX...

Page 76: ...eviations made up of strings of characters that you type You may never need to change the values of some parameters However these com mands give you maximum flexibility to adapt the PK 88 to your loca...

Page 77: ...ommand entry contains several sections o Command name o Command abbreviation or mnemonic o Default value o Parameters 5 2 1 Command Names The command name at the beginning of the description is the fu...

Page 78: ...te commands such as ID have no parameters Typing only ID causes the PK 88 to execute the command if HID is set ON Some commands such as CONNECT have optional parameters o If you type CONNECT without a...

Page 79: ...paces and punctuation o The text is accepted exactly as you type it Some commands require call signs as parameters The parameters may be any string of numbers or letters up to six characters character...

Page 80: ...rrent value of the com mand s arguments is displayed For example cmd MRPT Command typed without arguments MRPT ON displays the present value cmd MRPT Y Sets the value to YES ON MRPT was OFF Displays t...

Page 81: ...ur command properly and reminds you of what you have done too many packets outstanding This message appears in special circumstances in response to a CONVERS or TRANS com mand For example if you have...

Page 82: ...see this message if you try to type too long a CTEXT message The previous text entry is not changed when you see this error message too many You typed too many arguments for a command that expects se...

Page 83: ...is DISCONNECTED No link or connection exists right now You may type the CONNECT command to initiate a connection Link state is CONNECT in progress call1 VIA call2 call3 call9 You have already typed a...

Page 84: ...tion that initiated the connect request If the PK 88 rejects a connect request because you ve set CFROM to NONE or OFF you can issue your own connect request to the other station DISCONNECTED call si...

Page 85: ...mmands can be cleared by typing the command word followed by a single percent sign an ampersand or N NO NONE OFF as the command s argument BTEXT CFROM CTEXT DFROM MBX MYALIAS MHEARD MFROM MTO 5 6 Spec...

Page 86: ...idth in number of columns or char acters 0 zero disables the function The numerical value sets the proper terminal output format for your specific needs The PK 88 sends a CR LF sequence to your comput...

Page 87: ...rom monitored packets Some terminals and computers use special characters to clear the screen or perform other spe cial functions Placing these characters in the MFILTER list and turning AFILTER ON wi...

Page 88: ...he serial input output IO terminal port and your computer or terminal program Set AWLEN to 7 for most packet operations such as conversation working electronic mail and bulletin board systems and tran...

Page 89: ...iency when a voice repeater has a hang time greater than 100 ms For a repeater with a long hang time it is not necessary to wait for the repeater key up delay if the repeater is still transmitting Whe...

Page 90: ...nds This mode can be used to transmit packets for testing purposes When AFTER is specified a beacon is sent after n times 10 seconds have passed without packet activity The beacon is sent only once un...

Page 91: ...are discussed in more detail under the BEACON command You can send multiple line messages in your beacon by including CR characters in the text CR is inserted by typing the PASS character before the C...

Page 92: ...ransmit a continuous mark or space tone CANLINE n Mnemonic CAN Default 18 CTRL X Parameters n 0 to 7F 0 to 127 decimal specifies an ASCII character code CANLINE changes the CANCEL LINE input editing c...

Page 93: ...are thrown away by the PK 88 Typing the cancel output character a second time restores normal output To see how this works type DISPLAY then type a Y The command list display will stop You won t see a...

Page 94: ...s are accepted and which calls are rejected CFROM is set to all when you start the PK 88 for the first time CFROM ALL NONE is synonymous with the CONOK ON OFF command used in older packet control lers...

Page 95: ...ons as opposed to having your host computer operate multiple connections CHCALL is especially useful when operating with multiple connections Using CHCALL is similar to using MRPT to show digipeat pat...

Page 96: ...n and the other station seemed to disappear your PK 88 would remain in the connected state indefinitely refusing connections from other stations This might happen if propagation changes unexpectedly o...

Page 97: ...nged while active or on line in TRANSPARENT mode To switch channels ESCAPE to Command Mode then enter Converse Mode to use the CHSWITCH command NOTE When using the PK 88 with an electronic mail system...

Page 98: ...of n seconds following the last characters typed After a final delay of n seconds the PK 88 exits Transparent Mode and enters Command Mode You will then see the normal Command Mode prompt cmd The fol...

Page 99: ...received from a distant station or a con nection initiated by a CONNECT command that you ve typed Set CONMODE to CONVERS for most packet operations Set CONMODE to TRANS if you are using Transparent Mo...

Page 100: ...ding packets CONOK ON OFF Mnemonic CONO Default ON Parameters ON Functions identically to CFROM ALL OFF Functions identically to CFROM NONE CONOK ON OFF is synonymous with CFROM ALL NONE and is provid...

Page 101: ...have been set in the PK 88 a connect and disconnect sequence appears as follows cmd connect wx1aaa 10 55 23 CONNECTED to wx1aaa cmd disconnect 10 55 59 DISCONNECTED WX1AAA The CONNECT and DISCONNECT...

Page 102: ...rdinary character Set CPACTIME ON for an operation similar to full break in CW Setting CPACTIME ON transmits your text soon after you type it in short bursts of a few charac ters The other station may...

Page 103: ...h 4 CONNECT in progress Ch 5 DISCONNECTED Ch 6 DISCONNECTED Ch 7 CONNECTED to WX5EEE via WX6FFF Ch 8 DISCONNECTED Ch 9 DISCONNECTED This sample display shows that CHANNEL 0 has the input and output ch...

Page 104: ...time stamp received and monitored messages Entries in the heard displayed by MHEARD are also time stamped if date time has been set The PK 88 s time is updated continuously as long as it is powered up...

Page 105: ...e Use the PASS character to delete CR characters that have been typed into the text The BKONDEL command controls how the PK 88 indicates deletion To see a corrected display of the current line after d...

Page 106: ...ther than numeric values the DIGIPEAT command can be used with ON and OFF instead of ALL or NONE This alternate DIGIPEAT command is appropriate in certain electronic mail and bulletin board sys tems N...

Page 107: ...d parameter list DISPLAY is an immediate command When DISPLAY is typed without a parameter the PK 88 responds with cmd DISPLAY A C I L M T Z cmd You can display subgroups of related system parameters...

Page 108: ...ing station When all stations specify a default wait time and the right val ue of n is chosen the digipeater captures the frequency every time it has data to send digi peated packets are sent without...

Page 109: ...t is forced in Converse Mode A line is completed in Command Mode The packet length See PACLEN is exceeded The terminal output buffer fills up Canceling the current command or packet or typing the redi...

Page 110: ...dedi cated traffic trunks It should not be used unless both your station and the distant station can op erate in full duplex You may also find full duplex mode useful for some testing operations such...

Page 111: ...ders may extend across your screen or page when these functions are active HELP Mnemonic H Immediate Command While in Command Mode type the command H to read the abbreviated on line HELP file Your mon...

Page 112: ...en the PK 88 and a host computer In the Host Mode the PK 88 sends data to the computer only when the computer requests data The data are prefaced with a special header that identifies the type of info...

Page 113: ...ter MYALIAS WX1ABC digipeater ILFPACK ON OFF Mnemonic IL Default ON Parameters ON The PK 88 suppresses line feeds from the terminal OFF The PK 88 transmits line feeds from the terminal Use ILFPACK ON...

Page 114: ...ommands must be entered if they have been changed from the default values TRACE OFF HID OFF BEACON EVERY 0 PACKET The following commands must be entered CONMODE TRANS PPERSIST ON RAW ON HPOLL OFF KISS...

Page 115: ...completely under your SysOp control from your local terminal or computer keyboard Only you can start and stop MailDrop service The commands shown below provide Mail Drop control Set MAILDROP to ON to...

Page 116: ...ecially on HF radio when operating in conditions of multipath propagation and numerous colli sions If packet traffic is heavy or the path is poor reduce MAXFRAME to 3 2 or 1 If the radio link is good...

Page 117: ...shown without headers codes or repeated frames MBX overrides normal monitor functions and can show one or both sides of a conversation You can enter a single call sign or two call signs separated by...

Page 118: ...ee only the data When MCON is set to 6 frames meant for you are displayed as any other monitored frame The headers appear together with the data The meanings of the parameter values are 0 Monitoring w...

Page 119: ...You cannot log on to your MailDrop while a a calling station is connected or a connect is in progress Type B BYE to log off or quit local control of your MailDrop Your PK 88 is returned to MailDrop o...

Page 120: ...N OFF Mnemonic MDM Default ON Parameters ON Monitor a calling station s activity on your MailDrop OFF Normal monitoring as determined by the monitoring mode commands Set MDMON to ON to monitor your Ma...

Page 121: ...characters in either hex or decimal The default value 80 filters all received control characters except CTRL J 0A the line feed CTRL M 0D the carriage return and CTRL I 09 the HORIZONTAL TAB Use MFIL...

Page 122: ...conflict the arguments take the following priority 1 ALL 2 NO list 3 YES list 4 NONE Clear MFROM with or OFF as arguments MHEARD Mnemonic MH Immediate Command MHEARD is an immediate command that displ...

Page 123: ...gs is increased additional functions are included in the monitoring sequences The meanings of the parameter values are 0 All packet monitoring functions are disabled 1 Only unnumbered UI frames result...

Page 124: ...Use the MPROTO command to restrict monitoring and screen display when sharing radio channels with systems or packet nodes using higher level protocols Certain Level 3 packet node switching systems se...

Page 125: ...termine how the PK 88 monitors packet channels and displays informa tion which stations packets will be displayed and which stations packets will be masked or hid den MTO is set to none when you start...

Page 126: ...tation ID SSID or extension NOTE The PK 88 will not key your transmitter until you install your call sign in place of PK88 Use the MYCALL command to load your call sign into the PK 88 s RAM Your call...

Page 127: ...for the type of operation most suitable to your needs If NEWMODE is OFF and the link is disconnected the PK 88 remains in Converse or Transparent Mode unless you have forced it to return to Command M...

Page 128: ...erminals Teletype machines and printer terminals require some extra time for the printing head to do a line feed and return to the left margin NULF ON sol ves this problem my making the PK 88 send NUL...

Page 129: ...commands Set PACLEN so that the maximum number of characters outstanding doesn t ex ceed the receive buffer space of the TNC receiving the data It is not necessary that two TNCs be set to the same PA...

Page 130: ...c ASCII code for the character you ll use to signal that the character immediately following it is to be included in a packet or text string You can enter the code in either hex or decimal Use the PAS...

Page 131: ...threshold value for a random number attempt to trans mit 0 Signifies a 1 256th chance of transmitting every SLOTTIME 255 Signifies transmit right away without delay The PERSIST parameter works with PP...

Page 132: ...ons in AX 25 operation See PERSIST and SLOTTIME in this chapter See Chapter 6 for additional information on p persistent operation RAWHDLC ON OFF Mnemonic RAW Default OFF Parameters ON The PK 88 funct...

Page 133: ...nk has timed out on retries OFF The PK 88 will not attempt to re establish the failed link When RELINK is ON the PK 88 attempts to reconnect by sending SABM frames Connect Re quests after retrying out...

Page 134: ...link is disconnected A value of 0 for n specifies an in finite number of retries The FRACK command sets the time between retries See the FRACK command If the number of designated retries is exceeded t...

Page 135: ...ght not be quite as polite as it is normally and transmit on top of the other signals The PK 88 can use true RF carrier CSMA by monitoring the squelch line voltage from your radio This line can be eas...

Page 136: ...t terminal data rate in baud TBAUD displays the baud rate set by the autobaud routine when you first apply power to the PK 88 or after typing RESET Use TBAUD to set terminal rates not covered by the a...

Page 137: ...may be beneficial when working with radio receivers whose high frequency audio response is less than adequate In general practice use Bell 103 tones at the lower data rates for HF radio and Bell 202 t...

Page 138: ...human interface features such as input editing echoing of input characters and type in flow control are disabled Use Transparent Mode for transferring binary or other non text files TRFLOW ON OFF Mne...

Page 139: ...Parameters n 0 to 120 specifies ten millisecond intervals The TXDELAY command tells the PK 88 how long to wait before sending packet frame data after keying your transmitter s PTT line All transmitter...

Page 140: ...ptions When a destination is not specified unconnected packets are sent to CQ Unconnected packets sent from other packet stations can be monitored by setting MONITOR to a value greater than 1 and sett...

Page 141: ...s PTT line are disabled When XMITOK is OFF the PTT line to your transmitter is disabled the transmit function is inhib ited All other PK 88 functions remain the same The PK 88 generates and sends pack...

Page 142: ...Start character that is sent to the computer or terminal to restart input from that device You can enter the code in either hex or decimal The Start character default value is Q for computer data tran...

Page 143: ...n oscilloscope certain signals must be verified at various points on the board if the problem cannot be located by visual means or with a meter Avoid short circuiting pins on integrated circuits when...

Page 144: ...ugh the above steps may seem obvious careful visual inspection often points to a problem or provides significant indications as to the PK 88 s most suspect area Proceed to more specific analysis after...

Page 145: ...IC15 Pin 22 READ LINE RD IC14 Pin 21 WRITE LINE WR IC14 Pin 22 PCLK IC12 Pin 20 CLOCK TRXCA IC12 Pin 14 CLOCK RTXCA IC12 Pin 12 Each of these lines should show activity If any line is inactive this is...

Page 146: ...istant station s decoding improves If stations are unable to decode your transmissions when using SSB o Verify that you re using the same sideband used by the other stations in your net work Although...

Page 147: ...r reset in dicate that the PK 88 is sending data o Verify that transitions are also present on U4 pin 13 6 4 2 Symptom PK 88 signs on with mutilated data If the terminal displays strange characters ga...

Page 148: ...ault settings are in ef fect the PK 88 should echo typed characters back to the screen o Verify that U12 pin 21 shows a positive voltage level If the above tests are valid o Type any keys on the termi...

Page 149: ...A CAL Immediate Comm Starts calibrate mode CANLINE CAN 18 CTRL X Line delete character CANPAC CANP 19 CTRL Y Packet delete character CASEDISP CAS 0 as is Display case as is lower UPPER CBELL CB OFF En...

Page 150: ...n Host interface ID I Immediate Comm Force ID packet via Unproto path ILFPACK IL ON Ignore line feeds in packet xmit IO K K Immediate Comm Same as CONVERSE KISS KI OFF Use KISS TNC protocol MAILDROP M...

Page 151: ...g ACK RESTART RESTART Immediate Comm Same as power off on reset RETRY RE 10 Maximum number of frame repeats SENDPAC SE 0D CTRL M Character that sends a packet SLOTTIME SL 10 100 msec P persistent slot...

Page 152: ...nt the work area should be as static free as possible Try to avoid working in carpeted areas as rugs increase the chance your body will acquire a static charge It is also a good idea to discharge any...

Page 153: ...re of when connecting a TTL or RS 232 computer to the PK 88 The ONLY pins that should EVER be wired in a TTL configuration are pins 1 5 7 and 8 All other pins should be left uncon nected NOTE This is...

Page 154: ...PK 88 OPERATING MANUAL APPENDIX D D 1 PK 88 154 APPENDIX D SCHEMATIC and PARTS PICTORIAL...

Page 155: ...PK 88 OPERATING MANUAL APPENDIX D D 2 PK 88 155...

Page 156: ...TE 1 RED 2 BROWN 4 8 PIN WHITE 1 RED 5 BROWN 6 7 SPEAKER AUDIO AVAILABLE ON PIN 8 OF SOME MODELS GREEN WIRE SHOULD BE USED HT S GREEN WIRE TO THE TIP OF THE LARGE CONNECTOR BROWN WIRE TO THE SLEEVE OF...

Page 157: ...CAP IN SERIES WITH THE WHITE WIRE TS 940 TS 440 TS 140 TS 711 TS 680 TS 790 ON THESE RADIOS THE 13 PIN ACC 2 CONNECTOR MAY BE USED RED SHIELD WHITE BROWN GREEN PIN 13 PIN 12 PIN 11 PIN 8 PIN 3 TEN TEC...

Page 158: ...Pin 3 RED PTT Pin 4 WHITE Modulator in 100 mV RMS Pin 5 GREEN Audio out 47 k 100 300 mV Pin 6 Squelch low when open Pin 7 13 8 V 1 0 A Pin 8 ALC IC 781 ONLY Data in for the CRT Pin 1 ASCII Data IN Pin...

Page 159: ...o 1 default setting a break on the RS 232 line will put the PK 88 into the Command mode except from Host Mode If set to 0 a break on the RS 232 line will not affect the PK 88 Bit 3 position 0008 If bi...

Page 160: ...t For example the default is 0015 however if you enter decimal 21 the PK 88 will accept this The PK 88 will display on the screen the hexadecimal equivalent Using Hex Notation Observe some simple rule...

Page 161: ...frame Retried frames are not shown The MFROM and MTO commands are ignored MBX CALL 1 CALL 2 Only the data fields in the I and UI frames are shown when CALL 1 is the source and CALL 2 is the destinati...

Page 162: ...received BUFFER OVERFLOW An incoming packet overflowed an internal buffer Probably caused by a non AX 25 packet FRAME TOO LONG More than 300 bytes were received in a packet frame Probably caused by a...

Page 163: ...d its param eters after a power down What gives ANSWER The newer PK 88 s come with a lithium battery installed inside the unit Check JP 6 to see if it is OFF or ON It uses a small shorting plug to sho...

Page 164: ...mation and should be written down on the first page of your manual in case you should have to call for technical assistance We will want to know what the DATECODE and CHECKSUM of your firmware is as w...

Page 165: ...has a title that explains what it covers Refer to the chapter that applies to your question This is an excellent way to find information you require quickly Another approach to finding infor mation i...

Page 166: ...can talk to the PK 88 If you can make a new copy of the mal functioning program from the original disk and try again Trying your PK 88 on another working system is an excellent way to find the proble...

Page 167: ...that are closest to the outside edge of the board see Figure 1 below 2 Be sure to enable the battery in your PK 88 before you load MacRATT for the first time Then after doing the procedure outlined i...

Page 168: ...o position B This jumper is located in the front left corner of the circuit board between IC21 and IC22 Figure 1 below Position B means that the small plug is on the center pin and the pin closest to...

Page 169: ...If you wish to install the battery into the circuit place the jumper over both pins of JP 6 Your PK 88 has been shipped to you with the battery disconnected from the circuit In general if you are us i...