Anybody get UIRT2 to control DTC-100 directv sat. receiver?

[rbmcgee]

Hi all,

My UIRT2 seems to be working fine (receiving and transmitting) except that the DTC-100 (RCA hidef. sat. recrvr) won't respond to learned ir codes (or pasted codes from prontoedit). Any tricks?

Thanks
Bob

[AKsor]

:evil:

You are probably running into the same issue as the Dish network receiver owners. It is probably a 56kHz device and the UIRT2 so far does not have the 56kHz tx/rx feature added.

Laz

[rbmcgee]

You've got to be kidding. After all this. BAD WORD UTTERED.

[AKsor]

:evil:

Trust me I have tried, but nobody seems to be listening. I guess in Europe 56kHz devices are non existent so whats the use of implementing it.

I tired to get the author to implement this feature but so far he has ignored me. I tried to PM him and still no response. I asked for the source code so I can modify it myself no response.

I'm just about to give up trying to get him to implement it but I guess if a few more users are willing to request it he may change his mind.

The other otion is to either buy a Redrat or change mod my dish receiver and replace the 56kHz revceiver with a 40kHz on but then the original remote is useless.

Laz

[rbmcgee]

AKsor, I sympathize.

It seems to me that if I placed the transmitter at just the right angle and at just the right distance (about 2 inches from DTC-100) the commands would, sometimes, execute.

Does this mean that my sat. receiver uses something within the UIRT's capabilities or could it just be an anomoly?

Where would I go to find out what the transmission frequency of the DTC-100 is? I can't find it in the manual or on the RCA website.

[AKsor]

You could go to Remote Central and download the ccf2efc.exe file and also ccf file that contains the RCA control codes and one that contains the dish 3700 controls.

Then use the ccf2efc program to convert the ccf format to a text file.

Then use notepad to search trough the text file to find the pronto hex codes for your receiver. The pronto codes look something like this
0000 0064 001d 0032 0018 00xx 00xx 00xx 00xx ..... 03f6 for sony

what you need to look for is the second 4 digits 0064 BTW 0064 is ~40kHz wich is the actual frequency code.

Compare this to the dish 3700 pronto code and see if the second 4 digits are close to each other. the smaller the number the higher the frequency.
If the numbers are pretty close then your RCA is 56-58kHz

I hope this helps.

[Luc]

It would be nice if Jon could implement the 56kHz IR transmit.
The uirt protocol currently doesn't allow a simple modification to add this but it currently supports 4 different carriers wich are all close together and one of these could be changed into the so much desired 56.

I have been thinking about a hardware solution and have an idea on how to do it but would need testing. This would of course be an unelegant solution knowing that it can be done in the firmware.

[AKsor]

:lol:

Thanks for the encouraging news Luc!

I hope you have better luck in convincing Jon into modifying the code to support the 56kHz carrier.

I know its possible to do it externally bu it just adds to the part count.

Laz

[rbmcgee]

AKsor,

I've simply gone into my pronto and looked at the learned code for my 'go back' button originally from the dish remote. Here is the code:

0000 0048 004e 0000 00e4 00e7 001d 0039 001d 0073 001d 0073 001d 0073 001d 0039 001d 0039 001d 0039 001d 0073 001d 0073 001d 0039 001c 0073 001d 0039 001d 0073 001d 0039 001d 0039 001d 0039 001d 0073 001d 0073 001d 0073 001d 0039 001d 0039 001d 0073 001d 0039 001d 0072 001d 01cc 00e5 00e6 001d 0039 001d 0073 001d 0073 001d 0073 001d 0039 001d 0039 001d 0039 001d 0073 001d 0072 001d 003a 001d 0073 001d 0039 001d 0073 001d 0039 001d 0039 001d 0039 001d 0073 001d 0072 001c 0073 001d 0039 001d 0039 001d 0073 001d 0039 001d 0073 001d 01cc 00e5 00e5 001d 0039 001d 0073 001d 0072 001d 0073 001d 0039 001d 0039 001d 0039 001d 0073 001d 0073 001d 0039 001d 0073 001d 0039 001d 0073 001d 0039 001d 0039 001d 0039 001d 0073 001d 0073 001d 0073 001d 0039 001d 0039 001d 0073 001d 0039 001d 0073 001d 00e7

Since the second set of numbers is 0048, I assume that means it is 56 (or at least beyond the UIRT's capabilities) and that any successes were simply an anomoly. Do I understand this correctly?

Thanks
Bob

[AKsor]

You are right it does look like you are suffering from the same problem as I am.

Your receiver is up in the 56-58kHz range so the UIRT2 will not work with your receiver until somebody implements it.

The other choice is to mod the receiver with a 40kHz ir module and then u might be able to use the UIRT2.

I will be looking into this soon to see if I can connect both the 58kHz module and the 40kHz module trough an OR gate so I can still use the original remote and the UIRT2

Laz :evil:

[finalfour]

The solution to the DTC-100 is in this post.

http://www.girder.nl/phpBB2/viewtopic.php?t=2743

[rbmcgee]

finalfour,

I did see this thread a while back, but the solution of placing the UIRT emitter at a certain spot at a certain angle did not work for me. I think I got it to execute 1 command on 1 occasion, but other than that, nothing. Many, many, many tries.

Once Aksor explained the problem, it bacame apparent that controlling the DTC-100 w/ the UIRT is not possible. Even Luc basically admits this.

Do you actually have it working - consistently and repeatedly?

[s]

"see if I can connect both the 58kHz module and the 40kHz module trough an OR gate so I can still use the original remote and the UIRT2 "

Just connect them in parallel, the outputs of the IR Receivers are open collector (weak pullup), no need for additional components.