Many people have trouble setting up serial/usb channel changing using DVBLink, DirecTV and Windows 7. I am going to show you the software, hardware and steps I used to get channel changing that is 99% accurate (sometimes it misses the NFL Sunday Ticket HD sub channels).
- HDPVR IrBlaster Bridge - This is a drop in replacement for the Hauppauage IR Blaster DLL. It currently supports talking directly to the DirecTV STB via the serial port.
- (Optional) DirecTV Channel Control v1.0- This is a utility that will allow you to change channels and control your external direcTV set top box using the low speed data connection (home control) port in the back of the receiver. This is only needed for the NFL Sunday Ticket HD
- DB9, F/F, Null Modem Mini Type – monoprice
- 2 USB to Serial Convert Cables (DB9M/USB B female converter and USB A/B cable) – monoprice
Steps to setup
Install HDPVR Ir Blaster Bridge.
Connect the USB to Serial Convert Cables to the DB9 Null Modem and install the drivers.
Setup DVBLink to use the HDPVR IrBlaster Bridge or the custom hooks(Optional).
I forgot to include one important part. You need to edit the HDPVRIrBlaterBridge.dll.config file to match the COM port of your USB to Serial Cable. It is located by default in “C:\Program Files\ExpressIS\HDPVR IR Blaster Bridge\”
NFL Sunday Ticket and some of the other DirecTV sports packages use sub channels for the HD channels (ex. 703-1). I had to use the following to allow me to be able to correctly change channels to the sub channels.
Download DirecTV Channel Control. Extract it to a folder, I just put the directv.exe in C:\ to make it easy to find.
Edit the change-channel.cmd file located at C:\Program Files\DVBLogic\DVBLink\Data\HDPVR\Hooks. My channel-change.cmd code change-channel.
After follwing the above steps I was able to have 99% accurate channel changes through USB. It was faster and more reliable than using an IR blaster and it only cost about $18 for the extra cables and adapters.