Advanced Electronic Applications PK-88 Operating Manual
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Advanced Electronic Applications PK-88 Operating Manual

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Summary of Contents for Advanced Electronic Applications PK-88

  • Page 2 OPERATING MANUAL MODEL PK-88 PACKET CONTROLLER ADVANCED ELECTRONIC 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 written authorization from Advanced Electronic Ap-...
  • Page 3 AEA's programs such as PC-Pakratt simplify the way you enter commands 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, sections 2.5, 2.6 and 2.7 of the manual can be skipped.
  • Page 4 However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or TV reception, 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 receiving interference.
  • Page 5 Your new AEA PK-88 is the heart of your digital radio station. The PK-88's system software is de- rived from the original TAPR TNC; it presents many of the advanced features of that design, coupled with significant enhancements based on the experience gained by thousands of TAPR- equipped amateur Packet stations worldwide.

  • Page 6: Table Of Contents

    PK-88 OPERATING MANUAL TABLE OF CONTENTS TABLE OF CONTENTS Paragraph Page CHAPTER 1 – INTRODUCTION 1.1 Introduction ..................1-1 1.1.1 Scope ....................1-1 1.1.2 General ..................... 1-1 1.1.3 Application ..................1-1 1.2 Specifications ..................1-1 1.2.1 Description ..................1-1 1.2.2 Modem Characteristics ................ 1-2 1.2.3 Processor System ................

  • Page 7: Paragraph Page

    2.13 PBBS, Electronic Mail and File Server Program Compatibility ....2-19 2.13.1 Data Carrier Detect (DCD) Requirements ..........2-20 CHAPTER 3 – BASIC OPERATION 3.1 Exploring the PK-88 Program ..............3-1 3.2 LED Status and Mode Indicators ............. 3-1 3.2.1 Status Indicator LEDs ................. 3-1 3.2 2 The DCD LED - Data Carrier Detect .............
  • Page 8 PK-88 OPERATING MANUAL TABLE OF CONTENTS Paragraph Page CHAPTER 4 - OPERATING MODES 4.1 General Information ................4-1 4.1.1 Change Radio Link Data Rate .............. 4-1 4.1.2 Station Identification ................4-2 4.1.2.1 MYCALL Required at System Start-up ..........4-2 4.1.2.2 Substation Identifiers (SSIDs) ............4-2 4.1.2.3 Automatic Identification ..............
  • Page 9 PK-88 OPERATING MANUAL TABLE OF CONTENTS Paragraph Page 4.11.1 Default Multiple-Connect Conditions ........... 4-19 4.11.2 The USERS Command - Multiple-Connect Active ......... 4-19 4.11.3 CHSWITCH Character Selection ............4-19 4.11.4 The CHCALL Command - Display Multiple-Connect Call Signs ....4-19 4.11.5 The CHDOUBLE Command - Display Doubled Characters .....
  • Page 10 PK-88 OPERATING MANUAL TABLE OF CONTENTS Paragraph Page 5.6 Specific Commands ................5-10 8BITCONV ..................5-11 ACRDISP ..................5-11 ACRPACK ..................5-11 ADDRESS ..................5-12 AFILTER ................... 5-12 ALFDISP ................... 5-12 ALFPACK ..................5-13 AWLEN ..................... 5-13 AX25L2V2 ..................5-13 AXDELAY ..................
  • Page 11 PK-88 OPERATING MANUAL TABLE OF CONTENTS Paragraph Page FULLDUP ..................5-35 HBAUD ..................... 5-35 HEADERLN ..................5-36 HELP ....................5-36 HID ....................5-36 HOST ....................5-37 HPOLL ....................5-37 ID ....................5-38 ILFPACK ................... 5-38 IO ....................5-38 K ..................... 5-38 KISS ....................
  • Page 12 6.3.4 Symptom: Received signals not copyable ..........6-4 6.4 Terminal Interface Troubleshooting ............6-4 6.4.1 Symptom: PK-88 does not communicate with the terminal ....6-5 6.4.2 Symptom: PK-88 signs on with mutilated data ........6-5 6.4.3 Symptom: PK-88 does not respond or accept commands ....... 6-6...
  • Page 13 TABLE OF CONTENTS Paragraph Page APPENDICES APPENDIX A – PK-88 COMMAND LIST SUMMARY ........... A APPENDIX B – WARRANTY APPENDIX C – TTL HEADER INSTALLATION INSTRUCTIONS ......C APPENDIX D – SCHEMATIC DIAGRAM & PARTS PICTORIAL ......D APPENDIX E – SPECIFIC RADIO CONNECTIONS ..........E APPENDIX F –...

  • Page 14: Chapter 1 - Introduction

    1.1.3 Application The PK-88 Packet Controller is a digital link between your radio and your computer or ter- minal. 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 program or terminal emulator that you use with a tele- phone line modem.

  • Page 15: Modem Characteristics

    PK-88 OPERATING MANUAL INTRODUCTION 1.2.2 Modem Characteristics Modulator/Demodulator: AMD 7910 'World Chip' modem. Data format: Serial, asynchronous Modem Tones: Bell 103 and Bell 202 Transmitter: Modulation method: Binary, phase-coherent NRZI FSK Frequency accuracy: Bell 202 (mark) ± 1 Hz All others (mark) ± 0.4 Hz...

  • Page 16: General

    Two DIP Bypass Headers for TTL Serial Interface Compatibility Input/Output Devices The PK-88 can be used with any standard ASCII data terminal or computer equipped with an RS-232C serial data port and a communications 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.

  • Page 17: Chapter 2 - Installation

    2.1.1 Equipment Required A complete PK-88 Packet Controller system consists of the PK-88 and a 12 to 16-volt DC power supply, a computer, a terminal emulator or communication program for the com- puter, a radio transceiver or receiver-transmitter combination and its power supply.

  • Page 18: Radio Input And Output Connections

    2.2.2 Radio Input and Output Connections (See Table 2-1) We supply a shielded cable with your PK-88. You must supply and connect the plugs for the cable ends. This cable connects your PK-88 to your radio's microphone receptacle or PTT and phone patch/tone inputs.

  • Page 19: Controls And Indicators

    Power On Indicator Serial Port Configuration Verify that the PK-88's serial port and data words are set up properly for your computer. Should your monitor display garbled or incorrect characters or 'funny' graphic symbols, you can change the PK-88's serial port parity and word length. The common parity and word length combination is seven data bits, even parity, one stop bit.

  • Page 20: Echoes

    Type: ECHO OFF to stop the PK-88's echoes. If you use the PK-88 later with a different terminal program, you may see nothing dis- played when you type. In that case, set ECHO 2.6.2 Line Feeds and Carriage Returns If lines displayed appear to be double spaced, your computer is adding an extra line feed <LF>...
  • Page 21 If the cable and connections between the PK-88 and your computer are correct, the MULT LED will be extinguished and other LEDs will be lit as the PK-88 does its 'auto- baud' routine. As soon as the PK-88 has recognized your data rate and set itself to...

  • Page 22: Radio Connections And Setup

    DISCONNECT ALL POWER BEFORE MAKING ANY OTHER CONNECTIONS! Use this simple step-by-step routine to verify that all cables and connectors are properly in- stalled, and that the PK-88 Packet Controller is operating correctly. The procedure will also help you become familiar with the software commands and responses.

  • Page 23: Ptt (Push-To-Talk) Configuration

    Use only shielded wire for microphone audio circuits. If you notice significant hum in the monitored audio during modulation adjustments, verify ground and shield connections in the cable between the radio and the PK-88. The cable supplied with the PK-88 is shielded for these applications.

  • Page 24: Data Carrier Detect (Dcd Pin 8) Jumper Jp6

    Ignore the 'zeros' scrolling down the left side of your screen. The self-contained 7910 modem chip does not require calibration or tone adjustments. The 'zeros' appear only to show that the PK-88 is in the 'Calibrate' mode for the purpose of keying the transmitter and applying steady-state tone modulation for transmitter adjustment.

  • Page 25: Ssb Installation And Adjustment

    With your radio in the receive mode, open the squelch control so that a steady hiss or noise is heard on a speaker. Set the receiver's volume control so the DCD LED on the PK-88 just lights with the receiver unsquelched. This is the approximate proper audio level for best receive performance from the PK-88's modem.
  • Page 26 'IP' to read output device or plate current. If an output device or plate current reading isn't available, set the meter to indicate power output. Set the PK-88's TONE value to either TONE 0 for the low tone pair or TONE 1 for the high tone pair. HBAUD to 300.

  • Page 27: Command List Displays

    Set the receiver's audio volume control (AF Gain) to the position you would normally use for CW reception, or to a position such that the DCD LED on the PK-88 is just lit by the output noise signals from your receiver.

  • Page 28: Display Partial Command Lists

    PK-88 OPERATING MANUAL INSTALLATION DISPLAY Z command shows the complete command list. The defaults shown below are in effect when the PK-88 is turned on for the first time, and each time that you type RESET command. 2.9.2 Display Partial Command Lists The command list can be displayed in sections according to the class of parameter or function you wish to see.

  • Page 29: Display Special Characters

    PK-88 OPERATING MANUAL INSTALLATION 2.9.4 Display Special Characters disp c cmd: Send <BS><SP><BS> for DELETE char. BKONDEL LINE DELETE character CANLINE $18 (CTRL-X) PACKET DELETE character CANPAC $19 (CTRL-Y) Show call sign after channel ID CHCALL Show CHSWITCH character twice...

  • Page 30: Display Link Parameters

    PK-88 OPERATING MANUAL INSTALLATION 2.9.6 Display Link Parameters disp l cmd: CONNECT Link state is: DISCONNECTED Add <CR> to packet ACRPACK Send <LF> after <CR>, packet ALFPACK Operate as AX.25 Version 2.0 AX25L2V2 Connect requests from list of calls CFROM...

  • Page 31: Display Timing Parameters

    2.10 Immediate Commands The 'immediate' commands do not have default values. These commands take effect as soon 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.

  • Page 32: 2.11 Detailed Connections For Specific Computers

    Some computer dealers sell an 'IBM PCjr Adapter Cable for Serial Devices' that converts the connector on the PCjr to standard RS-232C. The cable is attached directly between the PCjr and the PK-88. The cable is only about three inches long; you may want to get a male-to-female RS-232C extension cable.

  • Page 33: Tandy Color Computer

    If your computer is configured as DCE: Wire pin 2 of the PK-88 to pin 3 of the computer connector. Wire pin 2 of the com- puter connector to pin 3 of the PK-88. Wire pin 7 to pin 7.

  • Page 34: Other Computers With Non-Standard Serial Ports

    Any communications program that enables your computer to emulate or act as an ASCII ter- minal with a telephone modem should work with the PK-88. If you have a familiar program you have used successfully, use it to communicate with the PK-88.

  • Page 35: Commodore 64, 64C, 128, Vic 20

    VO.97u, AC4XMPC V4.03, and others. 2.13 PBBS, Electronic Mail and File Server Program Compatibility The PK-88 can be used successfully with a variety of electronic mail programs, as well as with several PBBS (Packet Bulletin Board) programs written for the PC/MS-DOS computers.

  • Page 36: Data Carrier Detect (Dcd) Requirements

    In such cases, Pin 8 must be wired between the com- puter and the PK-88. The PK-88's jumper JP3 must be set to force Pin 8 to follow the PK-88's connect status. This requires a change from the factory-set jumper position. See paragraph 2.8.2 for jumper JP3 details.

  • Page 37: Chapter 3 - Basic Operation

    The DCD LED is an indicator of channel activity. When another station transmits, the DCD LED on the PK-88 should light for the duration of the received packet frame. If the DCD LED is lit by random noises, reduce your receiver's output volume control until the LED goes out.

  • Page 38: Entering Commands

    This message tells you that the value has been changed successfully. 3.3.3 Error Messages If the PK-88 cannot understand what you have typed, you'll receive an error message in English telling you the nature of the error. If you type an unrecognized command:...

  • Page 39: Command Names

    3.3.4 Command Names The command name is the full word or character string you can type to tell the PK-88 to execute this command. You can command the PK-88 by typing a minimum abbreviation called a 'mnemonic' instead of the full word. You may always type out the entire com- mand word, or any abbreviation longer than the minimum abbreviation.
  • Page 40 'digipeater', or a Packet switch or node). The call sign and SSID are entered and displayed as 'call-n.' If an SSID is not entered, the system sets it to 0 (zero); SSID '0' is not displayed by the PK-88. 3 - 4...

  • Page 41: Using Commands Without Arguments

    An appropriate entry would be BEACON EVERY 180 (this tells the PK-88 to send a beacon every 180 × 10 seconds, every 30 minutes), or BEACON EVERY 0 (tells the PK-88 to never send the beacon at all).

  • Page 42: General Messages

    This 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 prompt may not be visible, even though you are in Com- mand Mode.
  • Page 43 VIA keyword. ?callsign You typed a call sign in a manner that does not meet the PK-88's requirements for call signs. A call sign may be any string of numbers and letters, including at least one letter. Punctuation and spaces are not allowed. Any substation ID used must be a decimal num- ber from 0 to 15, separated from the call by a hyphen.

  • Page 44: Link Status Messages

    You can ask for link status at any time from the Command Mode by typing the CONNECT command without parameters. If you type a CONNECT command while the PK-88 is in connected state, your monitor will display the link status.

  • Page 45: Special Keyboard Control Codes

    DISCONNECTED: {call sign} Your connect request was rejected by a DM packet (busy signal) from the 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 occurred.

  • Page 46: Clear String Command

    Detailed Command Descriptions Chapter 5, Command Summary, presents detailed descriptions of each command contained in the PK-88's operating system software. You will find more information on the meaning, use and effects of each command, its parameters and mnemonics, default values and argu- ments.

  • Page 47: Backspace And Delete

    The PK-88 reads the control code and sends the time to your radio in the data transmission code in use at that time, in format HH:MM, where 'HH' is the hour in the 24-hour system and 'MM' is the minute.

  • Page 48: General Information

    Change Radio Link Data Rate The PK-88 provides radio link rates of 45, 50, 57, 75, 100, 110, 150, 200, 300, 600, 1200, 2400, 4800, 9600 and 19,200 BPS. The default data rate is set at the factory for 1200 BPS.

  • Page 49: Station Identification

    88. You cannot operate until you have done this. If you try to connect to a station without installing your call sign, the PK-88 will not transmit, but instead sends you this error message: ?need MYCALL 4.1.2.2...

  • Page 50: Connect' And 'Disconnect

    We are going to 'connect' the PK-88 to itself to see how this works. You have already set up the PK-88 in loopback; therefore, the PK-88 will receive as well as send packets.

  • Page 51: Send Packet Character

    Send Packet Character [↵] tells the PK-88 to assemble your typed characters in a packet and transmit them. (We will explain how to use a different character to send packets in Chapter 5, the 'Command Summary' chapter.) In the Converse Mode, everything you type is assembled into packets and sent to the station to which you are connected.

  • Page 52: Your First Packet Communication

    This is normal operation. If your system still had any unacknowledged pack- ets outstanding, the PK-88's STA (Status) LED would be lit – but it is not. (Unless you have set MCON to a value higher than '4,' your terminal will not display ACK frames.)

  • Page 53: What If

    Your Packet station can be a digipeater for relaying packets to a more remote destination. Functions like CONNECT MESSAGE take care of situations not easily solved in modes other than Packet. See the 'Command Summary' chapter for full details on the PK-88's com- mands.

  • Page 54: Will You Accept Connections

    YES (list) up to eight call signs whose call requests will be accepted; NO (list) up to eight call signs whose call requests will be rejected. CFROM's default argument is ALL. If ALL, the PK-88 will accept connect requests from any station that sends you a connect request.

  • Page 55: Are You Available To Chat

    CMSG ON (default is OFF) and use the CTEXT command to enter the type of message you might put in a telephone answering 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 prefixing them with the pass character (<CTRL-V>...

  • Page 56: Are You A Digipeater

    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 stations - unless you tell it not to! See the DFROM command in the Command Summary chapter.

  • Page 57: Do You Want To Be A Digipeater

    Use the RETRY command to control the number of times the PK-88 will repeat the connect request. The default value is 10. If your PK-88 does not get an ACK after that number (RE- TRY) of repeats, it quits and shows:...

  • Page 58: Retries While Connected

    At times a packet will not be received correctly by the other station because of collisions with packet signals from other stations, or channel noise. If your PK-88 does not get an ACK within a specific time, it sends the same packet again and increments the RETRY count.

  • Page 59: Monitoring Digipeaters - The Mrpt Command

    Receive Ready (RR), Receive Not Ready (RN), Reject (RJ), Frame Reject (FR) and I- Frames (I) are also displayed. Poll/Final bit and sequence numbers are also displayed. Before this next step, verify that your loopback test cable is still connected to the PK-88's J2 RADIO connector. Type: [^C]D[↵]...

  • Page 60: Selective Monitoring

    PK-88 OPERATING MANUAL PACKET OPERATION The PK-88's default (MCON 0) tells your system not to show packets from other stations while you are connected to any station. This lets you converse without interruption and confusion caused by the mixture on your screen of everyone else's packets and those of the distant station to which you're connected.

  • Page 61: The Mto Command

    Packet channels and displays information; the stations whose packets will be displayed or hidden. MTO is set to NONE when you start the PK-88 for the first time. To display the ALL|NONE/YES list|NO list status of call signs of stations to whom packets will or will not be displayed, type MTO.

  • Page 62: The Mcon Command

    Use the MHEARD command to display a list of stations heard since the last time you ap- plied power to the PK-88, or since the last time the MHEARD buffer was cleared. Entries in the 'heard' report are also time stamped if the date/time has been set with the DAYTIME command.

  • Page 63: Mstamp The Monitor Time-Stamp Command

    After the clock is set, you can display the time by entering DAYTIME without parameters. If you have removed power from the PK-88 since the last time you entered DAYTIME, you will have to reset the clock. The PK-88's time is updated continually as long as power is applied.

  • Page 64: Paclen - Long Or Short

    If you are not sure what your rub out key does, try both settings of the DELETE com- mand and see which works. When you rub out typing errors, the PK-88 tries to correct the screen display. This works with most computers and display-type terminals. It will not work for hardcopy terminals.

  • Page 65: Xon/Xoff, Start/Stop - Display Flow Control

    (You mistyped the call sign.) cmd: cmd:CONNECT WA7GXD Here you mistyped the first letters of the call and rubbed them out. The PK-88 displayed '\' for each letter erased. You then retyped the call and redisplayed the characters on the new line.

  • Page 66: Default Multiple-Connect Conditions

    PK-88 OPERATING MANUAL PACKET OPERATION 4.11.1 Default Multiple-Connect Conditions At start-up time and until you change it, the PK-88 defaults to the following multiple-con- nect conditions: CHCALL OFF CHDOUBLE OFF CHSWITCH $00 USERS 1 These defaults set the PK-88 to operate exactly as would a TNC without the multiple-con- nect feature.

  • Page 67: General Hints On Multi-Connect Operation

    [^C]=0DISCONNECT 4.12 MailDrop Operation The PK-88's MailDrop is a small, efficient personal mailbox that uses a subset of the well- known W0RLI/WA7MBL packet BBS commands. When your MailDrop feature is active, dis- tant stations can connect to your PK-88, leave messages for you or read messages from you.

  • Page 68: Ram Space For Message Storage

    MailDrop. You must use the MDCHECK command to 'log on' to your MailDrop to use the MailDrop KILL command (see below). A blinking STA LED shows that a message has been left for the PK-88 owner. Use of the MDCHECK command extinguishes the STA LED.

  • Page 69: Monitor Maildrop Operation

    PK-88 to connect and send the MailDrop prompt to the dis- tant station. You still have full control of your PK-88 while the MAILDROP is ON. You can initiate out- bound connect requests to other Packet stations and carry on normal connected-mode contacts.

  • Page 70: B (Bye)

    SEND command. 4.12.4.1 B (BYE) The 'B' command logs the calling station (and you) off the MailDrop. A calling station will be disconnected; you will see the standard PK-88 prompt. The calling station cmd: may also simply disconnect.

  • Page 71: Sample Session - The Caller's Point Of View

    However, a calling station may use the S command without a callsign; it is understood that the message is directed to the PK-88's SysOp. If a callsign is used, it must be ei- ther SYSOP or the same as the MYCALL of the PK-88.

  • Page 72: Read Messages

    READ Messages You've seen the list of messages and wish to READ yours. You've seen the MailDrop's prompt: (The MailDrop's prompt) [AEA PK-88] 6270 (B,K,L,R,S) > Now, type to READ one specific message in the MailDrop. (Type the READ 6 command)

  • Page 73: Other People's Messages

    DO YOU WANT ME THERE? IS MARY GOING? CUL. WX2BBB [^Z] (End the message with CTRL-Z) (The MailDrop is ready again) [AEA PK-88] 6336 (B,K,L,R,S) > 4.12.5.6 Other People's Messages You've done what you came to do. Now you're curious about the other messages on the MailDrop.

  • Page 74: Sorry, Wrong Number

    [AEA PK-88] 6270 (B,K,L,R,S) > Now, type (for Bye-Bye) to LOG OFF the MailDrop. (Type the Bye-Bye command) The MailDrop issues an immediate disconnect command to your PK-88 and the connec- tion is over. (Your PK-88's status line) *** DISCONNECTED 4.12.6...
  • Page 75 Hello Joe. Did you get the notice about next month's meeting of the Radio Society at the Firehouse? Will you be going? - I need a ride. [AEA PK-88] 6270 (B,K,L,R,S) > *** Done. [AEA PK-88] 6468 (B,K,L,R,S) > S WX2BBB...

  • Page 76: Chapter 5 - Command Summary

    This message confirms that the value has been changed successfully. 5.1.3 Error Messages If the PK-88 cannot understand what you have typed, you will see an error message in plain language reporting the nature of the error. 5 - 1...

  • Page 77: Command List

    PK-88 OPERATING MANUAL COMMAND SUMMARY If you type a command the PK-88 cannot understand - you will see: ?What? If you type a correct command word with a wrong argument: ?bad If you type a numerical value outside a parameter's range:...

  • Page 78: Default Values

    Most commands have initial (default) values that the PK-88 assumes for average operat- ing conditions, or values that are used most often. These defaults are stored in EPROM and loaded when power is first applied to the PK-88, or when you type the RESET com- mand.

  • Page 79: Text Or String Parameters

    'KX1AAA-12', or 'WX1AAA-1'. If an SSID or extension is not entered, the system assumes an SSID of '0' (zero). The zero SSID is not normally displayed by the PK-88. Some commands have parameters which are really lists of call signs: o CFROM, MFROM, MTO and DFROM commands allow you to specify from one to eight call signs for selective or restrictive operations.

  • Page 80: Using Commands Arguments Without Arguments

    Checksum $yy cmd: This sign-on message appears when you apply power to the PK-88, or when you type RESTART. The release date is updated whenever the firmware is changed. The checksum is a number used to verify the EPROM firmware.

  • Page 81: Command Mode Error Messages

    This causes the PK-88 to load the default parameters from EPROM. This will happen the first time you apply power to the PK-88 or if the batteries fail. This mes- sage also appears after the RESET command is given.
  • Page 82 PK-88 OPERATING MANUAL COMMAND SUMMARY ?What? Your first entry is not a command or a command abbreviation. The PK-88 did not under- stand the instructions. ?not enough You did not type enough arguments for a command that expects several parameters. For...

  • Page 83: Link Status Messages

    CONNECT command without parameters. If you attempt a connection when the PK-88 is not in the disconnected state, you see the link status but the PK-88 takes no other action. The following messages appear in re- sponse to the CONNECT command.
  • Page 84 DISCONNECTED: {call sign} Your connect request was rejected by a DM packet (busy signal) from the other station. The PK-88 will reject a connect request if CFROM is set to NONE, or if you are already connected to another station.

  • Page 85: Clear String Commands

    COMMAND SUMMARY FRMR rcvd: xx xx xx Your PK-88 has received an FRMR (protocol error described above) and displays the FRMR packet in hexadecimal format. This message will not appear if the PK-88 is in Transparent Mode. Clear String Commands While in Command Mode, the following commands can be cleared by typing the command word followed by a single percent sign (%), an ampersand (&) or N, NO, NONE,...

  • Page 86: Acrdisp

    When ACRPACK is OFF, the send-packet character is interpreted only as a command to the PK-88, not as data to be included in the packet; the character is not echoed to the terminal.

  • Page 87: Address

    ALFDISP controls the display of carriage return characters received in packets as well as echoing those that are typed in. When ALFDISP is ON, the PK-88 adds a line feed <LF> to each carriage return <CR> received. Each line feed received is ignored. Use the PK-88's sign-on message to determine how carriage re- turns are being displayed.

  • Page 88: Alfpack

    ASCII files. If eight-bit words are sent to the PK-88 in the Command or Converse Modes, the eighth bit is nor- mally removed, leaving a standard ASCII character, regardless of the setting of AWLEN.

  • Page 89: Axdelay

    When the PK-88 has heard a packet sent within the hang period, it does not add the repeater key- up delay (AXDELAY) to the key-up time. If you are using a repeater that hasn't been used for Packet operations before, try various values to find the best value for If other packet stations have been using the repeater, ask them for the appropriate setting.

  • Page 90: Beacon

    PK-88 OPERATING MANUAL COMMAND SUMMARY No "***connect request:" No "*** retry count exceeded" Sends carriage return before all other "***" No "(parm) was (value)" No "(callsign) busy" message BEACON EVERY|AFTER Mnemonic: B Default: EVERY 0 Parameters: EVERY Send the beacon at regular intervals.

  • Page 91: Btext

    <BACKSPACE> character <CTRL-H>. The PK-88 displays a <BACKSLASH> for each character you delete. You can see a display of the corrected input by typing the redisplay-line character set by the command REDISPLA.

  • Page 92: Calibrate

    PK-88 OPERATING MANUAL COMMAND SUMMARY CALIBRATE Mnemonic: CAL Immediate Command CALIBRATE is an immediate command that provides a means to key your transmitter and send continuous ASFK tone modulation. Use the CALIBRATE command to measure transmitter modulation and other performance charac- teristics.

  • Page 93: Canpac

    0 to 2 specifies how the PK-88 sends characters to your terminal. CASEDISP allows you to set the case of the characters the PK-88 sends to your terminal. This may be helpful with certain terminal programs. CASEDISP is disabled in Transparent mode.

  • Page 94: Cbell

    List of up to eight call signs, separated by commas. CFROM uses arguments to determine how the PK-88 responds to connect requests - which calls are accepted and which calls are rejected. CFROM is set to 'all' when you start the PK-88 for the first time.

  • Page 95: Chcall

    PK-88 OPERATING MANUAL COMMAND SUMMARY You can include optional SSIDs or extensions specified as - after the call sign. If CFROM is set to 'no WX1ABC' or 'yes WX1ABC,' any combination WX1ABC, WX1ABC-1 ..WX1ABC-15 will be matched and processed. If CFROM is set to 'yes WX1ABC-1' or 'no WX1ABC-1,' then only WX1ABC- 1 will match and be processed.

  • Page 96: Chdouble

    RELINK is ON and the specified time elapses without any packets being heard from the other TNC. If RELINK is ON, when a pre-Version 2 link is inactive for (CHECK times ten seconds), your PK-88 tries to save the link by starting a reconnect sequence. The PK-88 enters the 'connect in progress' state and sends SABM (Connect Request) frames.

  • Page 97: Chswitch

    If AX25L2V2 is OFF and the other station has not been heard for × 10 seconds, your PK-88 does not test the link to the distant station; your PK-88 sends a reconnect packet just as if you had typed the CONNECT command.

  • Page 98: Cmdtime

    The stored CTEXT message is sent as the first packet after a connection is established by a connect request from a distant station. The text message is not sent at all. CMSG enables or disables automatic transmission of the CTEXT message when your PK-88 accepts a connect request from another station. ⇒ Set...

  • Page 99: Conmode

    ⇒ Set CONMODE to TRANS if you are using Transparent Mode for a bulletin board program, so that the correct mode will be entered when your bulletin board receives a connect request. ⇒ If the PK-88 is already in Converse or Transparent Mode when the connection is completed, the mode will not be changed.

  • Page 100: Connect

    The current channel can be connected to and disconnected from other sta- tions. When ON, CONPERM forces the PK-88 to maintain the current connection, even when frames to the other station exceed RETRY attempts for an acknowledgment. RESTART and power off/on cy- cling do not affect this connected state.

  • Page 101: Constamp

    Date and time must be set initially by the DAYTIME command before time stamping will occur. For example, if CONSTAMP is ON and the date and time have been set in the PK-88, a connect and disconnect sequence appears as follows:...

  • Page 102: Cstatus

    ⇒ To include <CR> characters in transmitted packets, set SENDPAC to a character not normally used (e.g., <CTRL-P>); the PK-88 then treats a <CR> as an ordinary character. ⇒ Set CPACTIME ON for an operation similar to full break-in CW.

  • Page 103: Ctext

    Any combination of characters and spaces up to a maximum of 120 charac- ters. CTEXT is the 'automatic answer' text you type in to a special section of the PK-88's memory. The default text says Please leave a message, then disconnect.

  • Page 104: Daytime

    The PK-88's time is updated continuously, as long as it is powered up. The clock is not set when the PK-88 is turned on. The DAYTIME command displays the following error message: cmd: ?clock not set ⇒...

  • Page 105: Daystamp

    COMMAND SUMMARY Enter the numbers 0-9 with leading zeros; codes must be exactly two digits. Be aware of the month when you set the date - the PK-88 does not check for the correct num- ber of days in a month.

  • Page 106: Dfrom

    If the retry count is exceeded while waiting for the distant station to acknowledge your discon- nect command, your PK-88 switches to the disconnected state. If another disconnect command is entered while your PK-88 is trying to disconnect, the retry count is immediately set to the maximum number. In either case, your monitor displays:...

  • Page 107: Display

    DISPLAY is an immediate command. When DISPLAY is typed without a parameter, the PK-88 responds with: DISPLAY A,C,I,L,M,T,Z cmd: cmd: You can display subgroups of related system parameters by specifying the optional class parame-...

  • Page 108: Dwait

    DWAIT helps avoid collisions with digipeated packets. Unless the PK-88 is waiting to send digipeated packets, DWAIT forces the PK-88 to pause after last hearing data on the channel, for the duration of the DWAIT (Default Wait) time, before beginning its transmitter key-up sequence.

  • Page 109: Escape

    Type-in flow control is NOT active. When FLOW is ON, type-in flow control is active. Any character typed on your keyboard causes output from the PK-88 to the terminal to stop until any of the following conditions exist: A packet is forced (in Converse Mode)

  • Page 110: Fulldup

    Full duplex mode is ENABLED. Full duplex mode is DISABLED. When full-duplex mode is disabled (default), the PK-88 uses the DCD (Data Carrier Detect) signal from its modem to avoid collisions; the PK-88 acknowledges multiple packets in a single transmis- sion with a single acknowledgment.

  • Page 111: Headerln

    The PK-88 sends HDLC identification as a digipeater. The PK-88 does not send HDLC identification. The HID command activates or disables the PK-88's automatic periodic transmission of identifica- tion packets when operating as a digipeater. This identification consists of an unsequenced I-frame with your station identification (MYCALL) and MYALIAS in the data field.

  • Page 112: Host

    PK-88 OPERATING MANUAL COMMAND SUMMARY ⇒ Set HID ON to force the PK-88 to send an ID packet every 9½ minutes while used as a digi- peater. ⇒ Set HID OFF to stop the PK-88 from sending any ID packets.

  • Page 113: Ilfpack

    The K command is synonymous with the CONVERSE command and places the PK-88 in the Con- verse mode. When the PK-88 is in the Converse Mode, all characters typed from the keyboard or sent from a disk file are processed and transmitted by your radio.

  • Page 114: Kiss

    PK-88 OPERATING MANUAL COMMAND SUMMARY ⇒ To return the PK-88 to the Command Mode from the Converse Mode, type the Command Mode entry character (default is [^C]). KISS ON|OFF Mnemonic: KI Default: OFF Parameters: The PK-88 operates as a KISS TNC in Host Mode.

  • Page 115: Maildrop

    The PK-88 operates as a personal MailDrop. The PK-88 operates as a normal AX.25 Level 2 TNC. The PK-88's MailDrop is a small personal mailbox that uses a subset of the well-known W0RLI/WA7MBL packet BBS commands. When your MailDrop feature is active, distant stations can connect to your PK-88, leave messages for you or read messages from you.

  • Page 116: Mbell

    MTO callsign lists. When MBELL is set to ON, packet frames are monitored FROM and TO all. If call signs in the moni- tored headers match the MFROM or MTO lists, the PK-88 sends three BELL characters <CTRL-G> to the terminal.

  • Page 117: Mbx

    To return to normal operation, set: MBELL OFF MONITOR 4 MFROM ALL MTO NONE Note that if MBX is active and MBELL is ON, because of redundant I-frames, the PK-88 may send BELLS even when no data is displayed. MBX call1[,call2][- Mnemonic: MB Default: empty...

  • Page 118: Mcon

    PK-88 OPERATING MANUAL COMMAND SUMMARY NOTE: When using the MBX feature, your station is not part of the protocol handshake be- tween the originating and receiving stations. If noise bursts or interfering packets collide with the data being transferred between the two distant stations, you may miss one or more packets and lose one or more lines of text.

  • Page 119: Mdcheck

    MailDrop. You must use the MDCHECK command to 'log on' to your MailDrop to use the MailDrop KILL command (see below). A blinking STA LED shows that a message has been left for the PK-88 owner. Use of the MDCHECK command extinguishes the STA LED.

  • Page 120: Mdigi

    PK-88 OPERATING MANUAL COMMAND SUMMARY MDIGI ON|OFF Mnemonic: MD Default: OFF Parameters: I and UI frames having your call sign (MYCALL or MYALIAS) as the next digi- peater in the digipeater field are displayed, whether you are connected or disconnected.

  • Page 121: Memory

    MFROM uses arguments to determine how the PK-88 monitors the packet channels and displays information – which stations' packets will be displayed and which stations' packets will be masked or hidden. MFROM is set to 'all' when you start the PK-88 for the first time. Type...

  • Page 122: Mheard

    PK-88 OPERATING MANUAL COMMAND SUMMARY To stop any packets from being displayed, type MFROM NONE. To display packets from one or more specific stations type MFROM (YES followed by a list of calls signs). Packets will be displayed only from stations whose call signs are listed after YES.

  • Page 123: Monitor

    PK-88 OPERATING MANUAL COMMAND SUMMARY DAYSTAMP ON DAYSTAMP OFF cmd: cmd: 05-Jul-86 21:42:27 WA1FJW 21:42:27 WA1FJW 05-Jul-86 21:42:24 W61XU* 21:42:24 W61XU* 05-Jul-86 21:32:18 W1AW-5 21:32:18 W1AW-5 05-jul-86 21:27:57 W2HPM-4* 21:27:57 W2HPM-4* 05-Jul-86 21:26:41 W1AW-4 21:26:41 W1AW-4 05-Jul-86 21:26:38 W2JUP-9 21:26:38 W2JUP-9...

  • Page 124: Monitor On/Off

    PK-88 OPERATING MANUAL COMMAND SUMMARY MONITOR ON|OFF Mnemonic: M Default: ON (4) Parameters: Equivalent to MONITOR 4. Equivalent to MONITOR 0. In host computer applications that use a parameter value switching routine rather than numeric values, the MONITOR command can be used with ON and OFF instead of numbers 0 through 6.

  • Page 125: Mstamp

    – which stations' packets will be displayed and which stations' packets will be masked or hid- den. MTO is set to 'none' when you start the PK-88 for the first time. Type MTO to display the ALL/NONE/YES list/NO list status of call signs of stations to which ad- dressed packets will or will not be displayed.

  • Page 126: Myalias

    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 sign is inserted automatically in the FROM address field for all packets originated by the PK-88. MYCALL is also used for identification packets (see HID and ID).

  • Page 127: Newmode

    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 Mode. When NEWMODE is ON and the link is disconnected, or if the connect attempt fails, the PK-88 re- turns to Command Mode.

  • Page 128: Nucr

    NUCR ON sol- ves this problem by making the PK-88 send <NULL> characters (ASCII code $00) to your com- puter or terminal. This introduces any necessary delay after any <CR> sent to the terminal.

  • Page 129: Paclen

    'User data' means the characters you actually type at your keyboard (or send from a stored file). The PK-88 automatically transmits a packet when the number of characters you type (or send from disk) for a packet equals . This value is used in both Converse and Transparent Modes.

  • Page 130: Parity

    Default: 3 (even) Parameters: 0 to 3 selects a parity option from the table below. PARITY sets the PK-88's data parity for terminal or computer data transfer according to the follow- ing table: 0 = no parity 1 = odd parity...

  • Page 131: Passall

    When the channel is clear, the PK-88 generates a random number between 0 and 255. If this num- ber is less-than or equal to 'P', the PK-88 keys the PTT line, waits .01 × TXDELAY seconds, and then transmits all frames in its queue. The PK-88 then un-keys the PTT line and returns to the idle state.

  • Page 132: Ppersist

    The PK-88 functions as a normal AX.25 controller. Some host computer applications do not use AX.25 protocols. In such cases, the PK-88 can be op- erated as a raw HDLC controller, allowing the host to provide all protocol commands and re- sponses.

  • Page 133: Relink

    RESET is an immediate command that resets all parameters to default settings and reinitializes the PK-88. CAUTION: All personalized parameters and monitor lists are lost! To reinitialize the PK-88 using the parameter values in bbRAM, turn the PK-88 OFF then ON, or use the RESTART command. RESPTIME Mnemonic: RES...

  • Page 134: Restart

    88's bbRAM. Your personalized parameter settings are retained unchanged. The effect of the RESTART command is the same as turning the PK-88 OFF, then ON again. RESTART can be used remotely over the radio link to restart a PK-88 when required.

  • Page 135: Slottime

    Sense Multiple Access) circuit by sensing audio mark and space tones from your packet receiver. If there are signals other than packet on the channel you're using (such as voice operation), it's possible that the PK-88 might not be quite as polite as it is normally and transmit on top of the other signals.

  • Page 136: Stop

    Use the STOP command to select the User Stop character you want to use to stop output from the PK-88 to the terminal. Type this character to halt the PK-88's output to your monitor so that you can read the received text before it scrolls off your screen display.

  • Page 137: Tone

    At transmit time, the PK-88 reads the embedded control code (default [^T]), reads the time of day from the PK-88's internal clock and then sends the time to the radio in the data transmission code in use at that time.

  • Page 138: Trans

    If TRFLOW is ON, and START and STOP are set to values other than zero, software flow control is enabled for the user's computer or terminal. The PK-88 responds to the User Start and User Stop characters (set by START and STOP) while remaining transparent to all other characters from the terminal.

  • Page 139: Tries

    When TXFLOW is ON, the setting of XFLOW determines the type of flow control used in Transpar- ent Mode. When TXFLOW is OFF, the PK-88 uses only hardware flow control; all data sent to the terminal re- mains fully transparent.

  • Page 140: Unproto

    PK-88 OPERATING MANUAL COMMAND SUMMARY When TXFLOW and XFLOW are ON, the PK-88 uses the Start and Stop characters (set by XON and XOFF) to control the input from the terminal. Unless TRFLOW is also ON, only hardware flow control is available to the computer or terminal to control output from the PK-88.

  • Page 141: Xflow

    Use the XMITOK command at any time to ensure that the PK-88 does not transmit. Set XMITOK OFF if you're absent and wish to leave the PK-88 on as a channel activity monitor. Set XMITOK OFF for testing in loopback or direct wire connections when PTT operation is not re- quired.

  • Page 142: Xon

    Parameters: 0 to $7F (0 to 127 decimal) specifies an ASCII character code. XON selects the PK-88 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.

  • Page 143: Chapter 6 -Troubleshooting

    NEVER REMOVE OR INSERT AN INTEGRATED CIRCUIT DEVICE WITH POWER APPLIED The AEA PK-88 is a complex piece of electronic equipment. Servicing must be performed in a logical manner. Prepare for troubleshooting by studying the circuit diagram in the appendi- ces.

  • Page 144: Obvious Problems

    0 to +5 volts) exists at IC16 pin 6. The clock signal should be a moderately-dis- torted square wave. If the PK-88 responds to initial power application with ALL the LEDs lit but fails to respond to any commands: Verify that the 27256 EPROM at IC15 is correctly installed with the indicator notch position matching the marking on the PCB.
  • Page 145 PK-88 OPERATING MANUAL TROUBLESHOOTING If the PK-88 responds to initial power application with only the MULT LED lit but fails to re- spond to any commands: Suspect the terminal port at this point. The processor and the software in EPROM are probably operating correctly.

  • Page 146: Symptom: Transmitter Cannot Be Keyed

    6.4. Terminal Interface Troubleshooting If the PK-88 does not appear to start, respond to commands, or accept data from the termi- nal, the problem may be in the RS-232C interface. The following troubleshooting suggestions can aid in resolving problems related to the RS-232C port.

  • Page 147: Symptom: Pk-88 Does Not Communicate With The Terminal

    Verify that the RTS line on Pin 4 of J1 (the RS-232 1/0 connector) are not being held low. If the PK-88 software flow control is disabled by setting XFLOW to OFF, the controller will not send data to the terminal unless RTS is asserted.

  • Page 148: Symptom: Pk-88 Does Not Respond Or Accept Commands

    Type any keys on the terminal and verify that data is present on U12 pin27 and U4 pin 11. If data is not seen, the data is not reaching the PK-88 from the terminal. Verify J1, the cable, and U4 again.
  • Page 149 PK-88 OPERATING MANUAL APPENDIX A APPENDIX A – PK-88 COMPLETE COMMAND LIST NOTE: Certain commands and parameters shown in the following alphabetical listing do not appear in response to the DISPLAY command. COMMAND MNEMONIC DEFAULT FUNCTION 8BITCONV Strip bit 7 in CONVERSE...
  • Page 150 COMMAND MNEMONIC DEFAULT FUNCTION DAYSTAMP DAYS Includes DATE in time-stamp DAYTIME None Set/read PK-88 internal clock DELETE Uses <BS> ($08), not <DEL> ($7F) DFROM Selective digipeat call list DIGIPEAT Allow digipeating (TAPR) DISCONNE Immediate Comm. Send DISC to distant station...
  • Page 151 TRIES 0 (zero) Show or forces retry count TXDELAY 30 (300 msec.) PTT key-to-data delay (×10 ms) TXFLOW PK-88 flow control - Transparent UNPROTO Path/address to send UI frames USERS # of multi-connections allowed XFLOW Software (XON/XOFF) flow control XMITOK...
  • Page 152 1. Remove power and all other connections from the PK-88. 2. Open the PK-88 by removing the 4 screws that hold the top chassis in place. 3. Carefully remove the PK-88 top chassis and orient the PK-88 so the rear of the unit faces to the left.
  • Page 153 9. Carefully replace the PK-88 top chassis and the four screws that hold it in place. This completes the TTL Serial conversion of the PK-88. There are a few things you should be aware 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.
  • Page 154 PK-88 OPERATING MANUAL APPENDIX D APPENDIX D – SCHEMATIC and PARTS PICTORIAL D - 1 PK-88 - 154...
  • Page 155 PK-88 OPERATING MANUAL APPENDIX D D - 2 PK-88 - 155...
  • Page 156 APPENDIX E APPENDIX E – SPECIFIC RADIO CONNECTIONS NOTE: The wire colors listed in the PIN OUT column assume you have wired the PK-88 RADIO connector as described in section 2.2.2 of this manual. The colors are: PK-88 J2 Pin...
  • Page 157 PK-88 OPERATING MANUAL APPENDIX E MFT. RADIO PIN OUT NOTES KENWOOD 6 PIN WHITE 1 RED2 BROWN 6 8 PIN WHITE 1 RED 2 SHIELD 7 BROWN 8 TR-2500 WHITE > --||--> (0.1 µF) RING OF LARGE CONNECTOR TR-x600 SLEEVE OF LARGE CONNECTOR...
  • Page 158 PK-88 OPERATING MANUAL APPENDIX E ICOM IC-751 Pin 1 Output from the discriminator circuit Pin 2 13.8 volts DC, switched with front panel power Pin 3 RED. PTT when grounded Pin 4 GREEN. Fixed level audio out. Pin 5 WHITE. Input for mic gain control Pin 6 8 volts DC when transmitting, max.
  • Page 159 Not used with the PK-88. Bit 5, position $0020: If bit 5 is set to 1, then the PK-88 when powered on, will stay in the last mode it was in, i.e., converse, command, or transparent. If bit 5 is set to 0, (default mode) the PK-88 will always power up in the Com- mand mode.
  • Page 160 CUSTOM setting of $0005. The CUSTOM command will accept arguments in decimal format. 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.
  • Page 161 PK-88 OPERATING MANUAL APPENDIX F HOST OFF (3 [^C]) will force KISS OFF. The PK-88's CMD and PKT LEDs will be lit, confirming exit from KISS mode. "Temporarily forcing" a function means that the PK-88 will behave as if the function is set that way, although the function setting does not actually change.
  • Page 162 PK-88 OPERATING MANUAL APPENDIX F The PK-88 generates Morse code by switching from the mark tone to the space tone. This pre- vents other TNC's from accidentally transmitting and colliding with a CW ID. WHYNOT ON|OFF Mnemonic: WHY Default: OFF...
  • Page 163 ANSWER. No! The green wire, and the RX-IN jack are the same thing. They are directly wired to- gether inside the PK-88. You use one OR the other. A cable is supplied with the PK-88 that allows you to connect the RX-IN jack easily. Normally, the easiest place-to get the audio from the radio is from the EXTERNAL SPEAKER OUT if you are using the RX-IN cable.
  • Page 164 If the problem is serious, such as all of the LEDs on the front of the PK-88 stay on, or no LEDs are lit, it is best to take the cover off and inspect your PK-88.
  • Page 165 3. When going between PC-Pakratt and another program, after you exit the program, and before you bring up the other, it is a good idea to turn OFF your PK-88 for at least 10 seconds to let it return to DEFAULT parameters (unless you are running both programs with the same serial...
  • Page 166 2.11. Try another computer or serial port. If you have any other terminal programs, bring one up and see if you 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 problem also.
  • Page 167 (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 in chapter 3 of the MacRATT manual once ("Getting Started with the PK-87/PK-88") loading the program next time will be much easier, because the PK-88...
  • Page 168 Because the PK-88 is not a TNC-2 clone, TheNET™ firmware (and other firmware designed for TNC-2 clones) will not work in the PK-88. The main reasons are: 1) The TNC-2 uses hardware dip switches for selecting baud rates, where as the PK-88 baud rates are software selectable;...
  • Page 169 PK-88's. To electrically remove the battery from the PK-88 circuitry, leave JP-6 disconnected. 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- ing AEA's IBM program PC-Pakratt with FAX, you will want to leave the battery out of the circuit.

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