Difference between revisions of "Comtech module"

From BATC Wiki
Jump to navigation Jump to search
 
(14 intermediate revisions by one other user not shown)
Line 1: Line 1:
 
The Comtech modules sold initially by G1MFG are probably the most common analogue ATV equipment in use in the UK.
 
The Comtech modules sold initially by G1MFG are probably the most common analogue ATV equipment in use in the UK.
  
There are numerous modifications to improve the video quality of the basic Comtech modules
+
23cms and 13cms modules are still available from Roy G8CKN - email "antennas at tiscali.co.uk" for more details.
=== Downloads: ===
+
 
 +
=== Modifications ===
 +
There are numerous modifications to improve the video quality of the basic Comtech modules:
 +
 
 +
* [http://www.g8ajn.tv/comtech.html G8AJN]
 +
* [http://ve6atv.sbszoo.com/platinum/mods.htm VE6ATV]
 +
* [http://f5ad.free.fr/Liens_coupes_ATV/G/G1MFG%20Modif%20des%20modules%20comtech.htm F5AD - cache of original G1MFG page]
 +
 
 +
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):
 +
 
 +
[[:File:Solent video de-empasis circuit.jpg| Solent Video processing circuit]]
 +
 
 +
=== Manuals and documentation: ===
 
23cms
 
23cms
 
* [[File:23cm Tx Rx FINAL.pdf|G1MFG 23cms instruction sheet]] including frequency switch settings
 
* [[File:23cm Tx Rx FINAL.pdf|G1MFG 23cms instruction sheet]] including frequency switch settings
Line 12: Line 24:
 
* [[File:13cmRxDwg.pdf|Comtech 13cms Platinum rx schematic]]
 
* [[File:13cmRxDwg.pdf|Comtech 13cms Platinum rx schematic]]
 
* [[File:13cm Advanced 1MHz FINAL.pdf|G1MFG 13cms Advanced rx instruction sheet]]
 
* [[File:13cm Advanced 1MHz FINAL.pdf|G1MFG 13cms Advanced rx instruction sheet]]
 +
* [[File:13cm_Tx_20mW_FINAL.pdf|G1MFG 13cms 20mw tx instruction sheet]]
 
* [[File:13cmTxModule.pdf|Comtech 13cms Tx schematic]]
 
* [[File:13cmTxModule.pdf|Comtech 13cms Tx schematic]]
 
* [[File:13cm LCD controller V31 FINAL.pdf|G1MFG 13cms controller instruction sheet]]
 
* [[File:13cm LCD controller V31 FINAL.pdf|G1MFG 13cms controller instruction sheet]]
Line 23: Line 36:
 
*[[:File:Microwave Receiver instructions FINAL.pdf]]
 
*[[:File:Microwave Receiver instructions FINAL.pdf]]
  
 +
10 GHz
 
*[[:File:Tx-only 10GHz LCD controller FINAL.pdf]]
 
*[[:File:Tx-only 10GHz LCD controller FINAL.pdf]]
 +
 +
===G1MFG Software===
 +
 +
The 16F628 PIC hex software used in the G1MFG Comtech Modules sold for 23 cm, 13 cm and ENG (TX and RX) is in this zip file: [[:File:G1MFG-Modules.zip]]
 +
 +
The LCD Controller hex software for these modules (also using the 16F628) is here [[:File:G1MFG-LCD-controller.zip]]
 +
 +
===Other Software===
 +
 +
Hexcode for Comtech PIC from I2SDD is [http://www.i2sdd.net/ATV/COMTECH/PIC_COMTECH.txt available here]

Latest revision as of 14:15, 10 January 2020

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

G1MFG Software

The 16F628 PIC hex software used in the G1MFG Comtech Modules sold for 23 cm, 13 cm and ENG (TX and RX) is in this zip file: File:G1MFG-Modules.zip

The LCD Controller hex software for these modules (also using the 16F628) is here File:G1MFG-LCD-controller.zip

Other Software

Hexcode for Comtech PIC from I2SDD is available here