Robot Research Inc. Model 1200C

The most recent Robot model is the model 1200C Colour Scan Converter.
This is a sophisticated microprocessor based high resolution colour
video scan converter and image processor. The features displayed by
this converter are very advanced, using. state-of-the-art techniques
such as "Time Multiplexed Component Colour" (An explanation of this
technique is not within the scope of this book, but suffice it to say
that the results obtained can be more accurate end efficient than with
other SSTV modes). The converter is compatible with existing scan
converters with a choice of four transmission formats. This choice,
for black and white and colour operation, allows the operator to
obtain the best pictures, optimising between at speed and noise
immunity.

A problem that can often be a source of irritation is the constant
need to fine-tune some signals when receiving pictures, especially
when tuning in SSB. This problem is alleviated with the 1200C due to
the software system developed for the microprocessor. This system
automatically detects mistuning within +/- 150Hz and compensates
accordingly. Hard copies of received colour pictures can be produced
in colour if a suitable printer (e.g: Seikosha GP-700A) is attached.
When the converter is a being used to transceive pictures with another
Robot converter, an automatic mode of operation may be selected.

The fast-scan picture for transmission can be "snatched" from either a
colour camera or black and white camera equipped with colour filters.
Alternatively, a previously stored picture can be recalled from one of
six memories for transmission. There is also a built-in colour bar
generator, which is useful as a test pattern for receiver adjustment.
For ease of transmission the converter is equipped with a full width
screen cursor indicating the line being transmitted.

Another feature of this unit is the provision of two input/output
ports for connection to a suitable computer. This facility allows for
full remote operation of the 1200C from the computer via the parallel
port or an RS-232 serial port.

It can be seen therefore that this converter, utilising as it does the
most modern ideas and circuitry, is a very sophisticated piece of
equipment and will provide the user with “state-of-the-art results.

Specifications for the 1200C include the following:

* Transmit speeds selectable from: B&W - 120 lines @ 8 or 12 seconds, 240 lines
Me @ 24 or 36 seconds, Colour - 120 lines @ 12 or 24 seconds, 240 lines @ 36 or
me 72 seconds.

* Automatic speed following on receive to any of the standard SSTV formats.

* Video display composed of 61440 pixels in a 256 pixel by 240 line
array when in memory page 1 or 2 mode. An 18-bit digital "word" for
each picture element giving a possible 262144 colours.

* Standard camera input, 1 volt peak-to-peak into 75 ohms.

* SSTV signal input 20mV to 1V; minimum signal-to-noise ratio for
* clear picture
6dB

* Composite Video output at 1 volt peak-to-peak into 75 ohms.

* RGB Video output with composite sync on each. Separate syncs available.

* SSTV output 20mV to 1V for transmitter, adjustable by rear panel control.

* SSTV output 500mV (nominal) for tape recorder.
* Touch sensitive front panel controls with LED status indicators.