Comtech module

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The Comtech modules sold initially by G1MFG are probably the most common analogue ATV equipment in use in the UK.

23cms and 13cms modules are still available from Roy G8CKN - email "antennas at tiscali.co.uk" for more details.

Modifications

There are numerous modifications to improve the video quality of the basic Comtech modules:

Alternatively the Solent receiver included some excellent video backend processing which can be used to improve Comtech by taking the baseband feed out of the tuner via a 68 ohm resistor directly in to this circuit (ignore TR3a and TR3C as not relevant to this application):

Solent Video processing circuit

Manuals and documentation:

23cms

13cms

ENG and Microwave

10 GHz

Software

Hexcode for Comtech PIC is available here