Sacado del foro de Dvbviewer
Autor Griga
Aqui el link
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The DiSEqC issue seems to be caused by a Dynamic Current Limiting (DCL) protection of Hauppauge cards, as you can read here:

http://www.hauppauge.co.uk/board/showthread.php?t=15203

DCL can be switched off in the Registry. However, this entails the danger of damaging your hardware in case of short-circuit (if the inner conductor of your antenna cable touches the shielding). Only apply this fix, if you really need it. After applying it you must avoid a short-circuit by all means. Shut your PC down and disconnect it from the power supply before connecting/disconnecting the antenna cable!

Here is the meaning of different values in

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\HCW88BDA\Parameters\LNBVoltage_Ctrl

as far as investigated up to now. They apply to Hauppauge Nova S Plus, Hauppauge Nova S2 HD and Hauppauge HVR 4000 cards. Please note: A change requires rebooting your PC.

LNBVoltage_Ctrl | vertical | horizontal | card unused | Dynamic Current Limiting

0 ......................... 13,8 V ...... 18,8 V ........ 0 V .................... on

1 ......................... 13,8 V ...... 18,8 V ........ 0 V .................... off

2 ......................... 12,8 V ...... 17,8 V ........ 0 V .................... on

3 ......................... 12,8 V ...... 17,8 V ........ 0 V .................... off

4 ......................... 13,8 V ...... 18,8 V ........ 12,8 V ............... on

5 ......................... 13,8 V ...... 18,8 V ........ 12,8 V ............... off

6 ......................... 12,8 V ...... 17,8 V ........ 12,8 V................ on

7 ......................... 12,8 V ...... 17,8 V ........ 12,8 V................ off


LNBVoltage_Ctrl bit by bit:

- Bit 0 set: Switches DCL off.

- Bit 1 set: Lowers the LNB voltage by 1 V

- Bit 2 set: Supplies the LNB with power, even if the card is not used.

Thanks to qwr for researches!
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La tabla anterior tambien vale para la HVR-4000 al igual que esta. Me lo he guardado en mi chuleta para cuando tenga la 4000.
Por lo que deduzco y segun mis pruebas anteriores con la 3000, veo que donde esta activo el Dynamic Current Limiting (DCL) es cuando no va el motor, osea a probar los otros valores 1,3,5,7
Saludos.

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