JP1 Remotes

Carl

Does someone know the IR carrier frequency of Echostar 3100 Sat receiver.
It's a bell express VU receiver.

I'm having a hard time to make it work with my IR remote repeater.
The JP1 remote work fine but for some reason my repeater do not work with this equipment.I have tested my repeater with all my equipment and it's working fine.

Could this be because it's 56 KHz?

The Robman · Posted: Fri Dec 18, 2009 10:33 am Post subject:

Which setup code are you using? If it's SAT/0775 or SAT/1200, they are both 57 kHz, so that could well be the problem.

If it's SAT/1005, which is used by the Dishplayer, that runs at 38 kHz, which is a very normal frequency.
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www.hifi-remote.com
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Carl · Posted: Fri Dec 18, 2009 11:59 am Post subject:

I'm using SAT/0775

johnsfine

Carl · Posted: Sat Dec 19, 2009 11:23 am Post subject:

It works badly,some signal work but I would say 1 out of 10 try.

I'm pretty sure the repeater is good.

It is home made but the signal has been verified with a scope many times and like I said every equipment that I have tested work with the repeater (projector,Tv,Amplifier,DVD player). The repeater I made use a 4093 instead of a 555 so the carrier frequency is very clean and stable.
The only thing I can think of is the IR receiver which is 38KHz.
I have ordered a 56 KHz IR module.
As soon as I get it I will test the repeater again and see how it goes.

johnsfine · Posted: Sat Dec 19, 2009 12:16 pm Post subject:

I'm just guessing at the operational details of your repeater, but that guess is:

1) The repeater's 38kHz IR receiver does a poor job of seeing the 57kHz signal.

2) The repeater resends that signal at 38kHz.

3) The actual device's IR receiver does a poor job of seeing the 38kHz signal (since it expected 57kHz).

Issue (1) can be fixed with a JP1 cable by loading a custom version of the protocol executor that sends at 38kHz. If the device's IR receiver is less picky than the repeater's the problem might be solved.

I assume the extra module you ordered solves issue 1. Hopefully it also solves 2 and 3 (again I don't know design details of your repeater). So waiting for the extra module is easier than trying a maybe fix via JP1.

jetskier · Joined: 09 Dec 2003 Posts: 287 Location: Nevada

I have these all over the house at each TV.

http://www.beachaudio.com/Channel-Plus/2132-p-19552.html?osCsid=8m78qjcn0cv91uubcj9jjjdta6

All you need is 12V, ground and it sends the IR on a separate wire. No need to build a circuit.

I use Cat5 to get the signals back to my A/V closet where all my equipment is located. It works fine with all my components even the ones using the Dish 0775.

Carl · Posted: Sat Dec 19, 2009 1:42 pm Post subject:

A custom version of the protocol might be interesting to try.

Here is the repeater circuit for those who are interested.

http://www.abcelectronique.com/acquier/Sources/rep_sch.PDF

johnsfine · Posted: Sat Dec 19, 2009 2:28 pm Post subject:

Carl · Posted: Sat Dec 19, 2009 2:49 pm Post subject:

Yes the top section is a power supply for the IR module.
My whole circuit runs fine on 5 Volt only.

Well I have modified the circuit a bit.
I use a TSOP34338 module for receving the IR signal.
Also, I do not use 3 IR LED but only one.
The IR led and the IR receivers are both wired and connected to the circuit.

Yes I have to adjust the potentiometer to modify the carrier frequency to 56 KHz once I put my new IR module in place.

mr_d_p_gumby · Posted: Sat Dec 19, 2009 3:05 pm Post subject:

johnsfine · Posted: Sat Dec 19, 2009 3:08 pm Post subject:

mr_d_p_gumby · Posted: Sat Dec 19, 2009 3:18 pm Post subject:

Carl · Posted: Sat Dec 19, 2009 3:30 pm Post subject:

Well, if I can make it work with the 56 KHz module I will do another circuit dedicated to the echostar SAT.

As you can see the circuit cost almost nothing and is really simple to do.

Here is a picture of what mine look like:

Carl · Posted: Sat Dec 19, 2009 3:47 pm Post subject: