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Single Expansion
Amiga Video Terminal
Manufacturer
Advanced Electronic Applications
, USA
Date
1989
Amiga
any Amiga
Interface
parallel port
SSTV / Fax Data Codec
encoder/decoder for data transmissions over radio and telephone
processes audio frequency signals
integrated modem for transmission over telephone line
external hardware with numerous connectors:
5× RCA radio receiver / tape inputs
1× RCA Amiga audio input
1× 3.5mm stereo plug for PTT control signal and AF tone for Packet Radio AFSK
1× RJ-11 telephone connector
2× RCA Audio outputs (tape out/radio out)
1× DB25 connector, plugs into Amiga parallel port
hardware is based on the Motorola MC68705 microprocessor, an embedded 8-bit processor with integrated EPROM
supports SSTV and Fax image encoding and decoding
SSTV:
55 modes
resolution 128×120 px - 640×400 px
up to 4096 colors
compatible with practically all available commercial and experimental mode at the time
automatic reception of images
Fax:
9 modes
resolution 1024px × 1200 lines
16 greyscales
supports 60, 120, 240 lpm
multiple aspect ratio support
compatible with WEFAX, NEWSFAX
custom demodulation curves
AM modulated signals, e.g. GEOS FAX, are not directly supported and require an optional add-on board:
Overview A.P.T.
by Overview Systems
software provides tuning oscilloscope and multiple editing options for the received images
macro and script capabilities
software provides memory for 16 images
external power supply (12-14V DC, center pin positive)
Notes
hardware and software was developed by
Black Belt Systems
, AEA later purchased the rights to market and distribute the system
Photos
top side
top side
Manual
AmigaVideoTerminal_Schematic.pdf
Schematic and User Manual Addendum
1024 kB
Driver / Installation Disk
AVT-550.dms
install disk v5.50
432 kB
Vintage Advert
Advert (US)
1990-07
Advert (US)
1991-07