Note
The Timewave/AEA PK-12 is a 1200 baud, packet-only controller designed to provide a high-performance packet operating platform for VHF or UHF transceivers. It functions independently once configured, allowing users to turn off their computers while the PK-12 continues to handle connects, mail, and node operations.
Key Features
– Packet Modes: Supports AX.25 levels 1 & 2, with 1200 bps packet operation available in Command, Host, and KISS modes.
– MailDrop System: Includes a standard 32K RAM for the MailDrop (mailbox) system, which can be upgraded to 128K to increase mailbox size from 15K to 100K.
– GPS Functionality: Features remotely programmable and pollable GPS firmware. It is compatible with GPS, Loran, ARNAV, and Ultimeter II systems and includes a Stand Alone Tracking feature that automatically detects GPS receivers at power-up.
– Node Gateway: Functions as a gateway for node operation and supports DAMA (Demand Assigned Multiple Access) for master/slave node communication.
– Power Efficiency: Designed for low power consumption, allowing it to run on a 9-volt battery or in a dedicated "low power" mode for portable use.
– Connection Control: Includes specific commands like DFROM and CFROM to control which stations are permitted to connect.
– User Interface: Provides an "EXPERT" command mode that hides advanced commands from beginners until they are ready to use them.
Specifications
– Processor: Z-80
– Memory (Standard): 32K RAM (15K MailDrop), 128K ROM
– Memory (Upgraded)… 128K RAM (100K MailDrop)
– Radio Data Rate: 1200 bps
– Terminal Data Rate: 300, 1200, 2400, 4800, 9600 bps
– Modulation: Audio Frequency Shift Keying (AFSK)
– Audio Output Level: 5 to 200 mV RMS (adjustable via rear panel pot)
Hardware Indicators and Connections
– Front Panel LEDs:
XMT: Lit when the transmitter is keyed.
DCD (Data Carrier Detect): Lit when the unit hears data on the channel.
CON: Indicates a connection to another packet station.
STA: Indicates unacknowledged messages or data in the transmit buffer.
MAIL: Lit when mail is waiting in the MailDrop.
POWER: Indicates the unit is receiving power.
– Rear Panel Ports:
POWER (+13VDC): 2.1mm coaxial power jack.
COMPUTER (RS-232): DB-25F connector for serial communication with a computer or terminal.
RADIO: 5-pin DIN connector for transceiver interfacing (includes TX Audio, RX Audio, PTT, Squelch, and Ground).
TX LEVEL: External adjustment pot for setting the AFSK output level without opening the case.
Power Requirement: 12-14 VDC (regulated)
Current Drain: 70 mA; low power mode: 40 mA
