Difference between revisions of "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. | 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. |
| − | === | + | |
| + | === 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]] | ||
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*[[: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
- File:23cm Tx Rx FINAL.pdf including frequency switch settings
- File:23cm LCD controller V3 FINAL.pdf
- File:Comtech 23cms rx.pdf
- File:23cmTxModule.pdf
13cms
- File:13cmRxDwg.pdf
- File:13cm Advanced 1MHz FINAL.pdf
- File:13cm Tx 20mW FINAL.pdf
- File:13cmTxModule.pdf
- File:13cm LCD controller V31 FINAL.pdf
ENG and Microwave
- File:13cm LCD controller V31 FINAL.pdf
- File:23cm LCD controller V3 FINAL.pdf
- File:ENG controller instructions FINAL.pdf
- File:ENG_Rx_FINAL.pdf
- File:Microwave Receiver Controller Connections FINAL.pdf
- File:Microwave Receiver instructions FINAL.pdf
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