PK-232 MBX – OPERATING MANUAL TABLE OF CONTENTS
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Paragraph Page
3.3.8 Connections for an Oscilloscope ............................................... 3-6 .............. 30
3.4 PK-232 Configuration Jumpers and Connections .................................. 3-6 .............. 30
3.4.1 Push-To-Talk (PTT) Configuration ............................................. 3-6 .............. 30
3.4.2 PK-232 Connections ................................................................ 3-7 .............. 31
3.5 Transceiver Adjustments .................................................................... 3-7 .............. 31
3.5.1 FM Transceiver Final Adjustments ............................................ 3-7 .............. 31
3.5.2 SSB Transceiver Final Adjustments ........................................... 3-9 .............. 33
CHAPTER 4 – PACKET-RADIO
4.1 Overview .......................................................................................... 4-1 .............. 36
4.1.1 Getting Started ....................................................................... 4-1 .............. 36
4.1.2 Making the Loopback Connection ............................................. 4-1 .............. 36
4.2 Packet Introduction ........................................................................... 4-2 .............. 37
4.3 VHF/UHF Packet Operation ................................................................ 4-4 .............. 39
4.3.1 What You Should See ............................................................. 4-5 .............. 40
4.3.2 What It Means ....................................................................... 4-6 .............. 41
4.3.3 What Happens When You Connect ........................................... 4-7 .............. 42
4.3.3.1 Standard TNCs ............................................................ 4-8 .............. 43
4.3.3.2 Mailbox Message Systems ............................................. 4-8 .............. 43
4.3.3.3 Packet Switches ........................................................... 4-9 .............. 44
4.3.4 Who Can I Talk To? ................................................................. 4-11 ............ 46
4.3.5 Your First Real Connect ........................................................... 4-11 ............ 46
4.3.6 I'm Having Trouble Connecting ................................................ 4-12 ............ 47
4.4 More Packet Features ........................................................................ 4-12 ............ 47
4.4.1 LED Status and Mode Indicators .............................................. 4-13 ............ 48
4.4.2 Automatic Greetings ............................................................... 4-13 ............ 48
4.4.3 Beacon Operation ................................................................... 4-13 ............ 48
4.4.4 Digipeater Details ................................................................... 4-14 ............ 49
4.4.4.1 Are You a Digipeater? ................................................... 4-14 ............ 49
4.4.5 Monitoring Other Stations ....................................................... 4-15 ............ 50
4.4.5.1 Monitoring the Packet Networking Switches ................... 4-15 ............ 50
4.4.5.2 Monitoring Other Stations While Connected ................... 4-16 ............ 51
4.4.5.3 Selective Monitoring ..................................................... 4-16 ............ 51
4.4.5.4 The MFILTER Command ............................................... 4-16 ............ 51
4.4.5.5 Monitor Without Callsign Headers .................................. 4-16 ............ 51
4.4.5.6 MSTAMP - The Monitor Time-Stamp Command ............... 4-16 ............ 51
4.4.6 Packet Connects ..................................................................... 4-16 ............ 51
4.4.6.1 Time-Stamping Connects .............................................. 4-17 ............ 52
4.4.6.2 Connect Alarm ............................................................. 4-17 ............ 52
4.4.7 Packet Formatting and Editing ................................................. 4-17 ............ 52
4.4.7.1 Carriage Returns and Linefeeds in Packets ..................... 4-17 ............ 52
4.4.7.2 Canceling Lines and Packets ......................................... 4-17 ............ 52
4.4.7.3 Redisplay .................................................................... 4-18 ............ 53
4.4.7.4 The PASS Character ..................................................... 4-18 ............ 53
4.4.8 Packet Transmit Timing ........................................................... 4-18 ............ 53
4.4.8.1 TXDELAY and AUDELAY ................................................ 4-18 ............ 53
4.4.8.2 AXDELAY and AXHANG ................................................. 4-19 ............ 54
4.5 Packet Protocol Basics ....................................................................... 4-19 ............ 54
4.5.1 Unconnected Packets .............................................................. 4-19 ............ 54
4.5.2 Connected Packets ................................................................. 4-19 ............ 54
4.5.3 FRACK and RETRY .................................................................. 4-20 ............ 55
4.5.4 PACLEN and MAXFRAME ......................................................... 4-20 ............ 55
4.5.5 Reducing Errors Through Collision Avoidance ............................ 4-20 ............ 55
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