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Topic:
MRF-350 IR In Question
This thread has 4 replies. Displaying all posts.
Post 1 made on Thursday December 4, 2008 at 13:18
ver2go
Lurking Member
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Posts:
December 2008
6
I have IR distribution over CAT5 in another room. So I feed that from a Channel Vision P-1205 into the MRF-350's IR in so I only need 1 set of IR emitters.

Problem is that the IR from the distribution through the MRF is not working.

Yet at the same time I also have a wireless extender from a Logitech into the MRF's IR as well. Commands from that is working.

I've tried just one at a time as well, ie just the extender or just the IR distribution. Always, just the extender from the IR in on the MRF works.

Here is an ASCII diagram:

IR Emitters To Devices
|
|
+ MRF-350-- RX250
|
+-- IR IN ---
| |_ Logitech Extender IR out
|
|_Channel Vision P-1205 IR Emitter
|
+--- IR Recvr+
|
|
CE Labs IREmitter-----+
CAT5TX
//
CAT5 cable to remote room
\\
CAT5RX CE Labs
|
+-- IR RECVR


Any ideas would be appreciated.

Last edited by ver2go on December 4, 2008 13:33.
Post 2 made on Thursday December 4, 2008 at 13:56
tweeterguy
Loyal Member
Joined:
Posts:
June 2005
7,713
I'd first take the logitech out of the mix for testing...

Does the CV unit work by itself and enable control of the equipment in the rack via an emitter? If not, there's one problem you have.

It sounds like you've extended an emitter from the CV zone IR output to the IR input on the MRF (not IR out), i.e. you are using the phoenix connector on the MRF, correct?
If so, are you sure you've maintained straight through continuity on the pairs? Note, you don't want to hook up to the 5v on the MRF, just data and ground. The CV unit should be powered via its own appropriate transformer. Also note that on the MRF side of things, tip is data and sleeve is ground. That may or may not be the case on the CV end (not familiar with that model never used one). Try reversing the pair, you may have data and ground swapped.

How far away is the CV from the MRF? Have your tried doubling up pairs of the CAT5?
OP | Post 3 made on Thursday December 4, 2008 at 14:41
ver2go
Lurking Member
Joined:
Posts:
December 2008
6
Thanks for the help.

I'd first take the logitech out of the mix for testing...

Tried this and IR from the remote room did not work

Does the CV unit work by itself and enable control of the equipment in the rack via an emitter?

Yes, see Original Diagram

It sounds like you've extended an emitter from the CV zone IR output to the IR input on the MRF (not IR out), i.e. you are using the phoenix connector on the MRF, correct?
If so, are you sure you've maintained straight through continuity on the pairs? Note, you don't want to hook up to the 5v on the MRF, just data and ground. The CV unit should be powered via its own appropriate transformer. Also note that on the MRF side of things, tip is data and sleeve is ground. That may or may not be the case on the CV end (not familiar with that model never used one). Try reversing the pair, you may have data and ground swapped.
How far away is the CV from the MRF? Have your tried doubling up pairs of the CAT5?

All the connections are 3.5mm jacks except the CV IR Emitter to MRF-350 which uses the 3.5mm on the CV end and the 3 wires to the MRF which I tested with a meter.
Was working in Original Diagram above. Same distance ~ 50 feet

Maybe the new diagrams will make more sense. Basically I took the IR Emitter Out and Jacked it to the MRF IR IN.
Moved the emitters from the CV to the MRF



Original:

To Devices
|
|
+ CV IR Emitter
Channel Vision P-1205
+ CV IR RCVR
|
+------+--- Y 3.5 mm Cable----+
| |
+CAT5TX IR Emitter +-- Extender
//
CAT5 cable to remote room
\\
CAT5RX
|
+-- IR RECVR


Now:

To Devices
|
|
+ MRF Emitter
MRF 350
+ MRF In
|
+ CV IR Emitter
Channel Vision P-1205
+ CV IR RCVR
|
+---- Y 3.5mm Cable ----------+
| |
+CAT5TX IR Emitter +-- Extender
//
CAT5 cable to remote room
\\
CAT5RX
|
+-- IR RECVR

Post 4 made on Thursday December 4, 2008 at 15:08
tweeterguy
Loyal Member
Joined:
Posts:
June 2005
7,713
Why do you have 3 wires going to the MRF? An IR emitter needs data and ground, 2 conductors and you are locally powering the CV block and IR pickup right?

Remove the 3.5mm Y from the system. Take a 3.5mm end from the MRF kit, chop it, splice CAT5, protect from short, insert 3.5mm into CV IR out, take the tip conductor to data and sleeve conductor to ground on the MRF IR IN phoenix connector. Use emitters that came with MRF and test.

If that doesn't work, it's possible the CV is overdriving the MRF, you could try padding it down with a resistor.
OP | Post 5 made on Friday December 5, 2008 at 11:54
ver2go
Lurking Member
Joined:
Posts:
December 2008
6
Thanks! The resistor did the trick. Thank you for your help.


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