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Operating frequencies of Beo4

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pacificocean
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pacificocean posted on Sun, Jul 14 2013 2:53 PM

On the Bang & Olufsen website it is stated that the beo4 operates at 455 kHz for Bang & Olufsen products and 20-80 kHz for third party non-A/V product control http://www.bang-olufsen.com/en-US/picture/beo4. Does anyone know if the is only for the newest Beo4 mk4 model or also for older Beo4 models. e.g. Does a Beo4 mk1 also operate at 20-80 kHz? And how about older Beolink models?

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RaMaBo
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Answered (Verified) RaMaBo replied on Sun, Jul 14 2013 5:26 PM
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Hi,

 

B&O used 455 KHz as carrier frequency at least since Beolink 1000, every remote afterwards used it also. Only with Beo 5 and 6 you can send with a lower freq.

To receive the 455 KHz you can try to get a TSOP7000 (Standard package like other receiver chips) or the TSOP5700 which is the SMD version. Both are capable of receiving the 455 KHz IR signal, demodulate it and give the transferred information at its output.

Another possible solution is an old MCL Tranceiver which also receives 455 KHz or the VX IR sensor (rare).

What do you need the IR receiver for?

 

Ralph-Marcus

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ipaul
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ipaul replied on Sun, Jul 14 2013 3:34 PM

To my knowledge, all B&O IR remotes operate art 455 Khz, expet some of the remotes dedicated to some systems (not compatible with other products)

All Beo4 and Link 1000 is 455 Khz.

pacificocean
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As stated in my startpost. Bang & Olufsen themselfs report differently. I even think that Bosscom is using this operate their pcb boards for the Beo4 http://eu.bosscom.com/product.asp?id=1091. It could be off course that B&O is wrong and that the lower frequentions are only applicable for Beo5 and 6.

I want to know If I am able to receive the B&O signals on a IR receiver and translate them to other IR signals. However it is hard to get a 455 Khz receiver. It would be nice if a normal IR receiver will do the same thing.

RaMaBo
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Answered (Verified) RaMaBo replied on Sun, Jul 14 2013 5:26 PM
Verified by Johan

Hi,

 

B&O used 455 KHz as carrier frequency at least since Beolink 1000, every remote afterwards used it also. Only with Beo 5 and 6 you can send with a lower freq.

To receive the 455 KHz you can try to get a TSOP7000 (Standard package like other receiver chips) or the TSOP5700 which is the SMD version. Both are capable of receiving the 455 KHz IR signal, demodulate it and give the transferred information at its output.

Another possible solution is an old MCL Tranceiver which also receives 455 KHz or the VX IR sensor (rare).

What do you need the IR receiver for?

 

Ralph-Marcus

tournedos
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RaMaBo is correct - I'll just add that this confusion stems from the B&O marketing material that essentially means that you can control other devices with a Beo4 via Masterlink Gateway (MLGW).

It definitely does not send at other carrier frequencies than 455 kHz and doesn't have any kind of programmability (in the sense that you could use it to control other devices than B&O directly).

TSOP7000 (and I presume the  SMD version as well) have been discontinued for a while now, and it might be difficult to find them anywhere. I suppose this is the reason that Lintronic, for example, doesn't have built-in 455 kHz receivers in their latest versions.

--mika

pacificocean
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Thanks for your replies. It seems that the B&O website is wrong then. I would like to operate my Samsung TV with a B&O remote. I was thinking of building something like a Lintronic based on an Arduino board. Indeed the Tsop7000, Tsop5700 and Tsop98200 are no longer available. I am wondering then how Lintronic and B&O themselfs are receiving the 455KHz signals.

I still have the electronics of a MX7000. Is it possible to use the IR receiver from this TV? Or is it possible to use the http://www.soundsheavenly.co.uk/bando-tvir.htm from Steve?

kallasr
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kallasr replied on Mon, Jul 15 2013 12:38 PM

Search for linvis oneremote...

Ralf

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stefan
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stefan replied on Mon, Jul 15 2013 2:11 PM

Beo site is definitely wrong. I think, they just copied the Beo6 text to Beo4 site....(?)

I`t recommend a Lintronic box 5.x with builtin IR receiver to control your Samsung TV, works nice.

2nd option is modify your Beo4 with a oneremote board.

http://shop.oneremote.dk/catalog/index.php?cPath=1

you can use IR receivers from old LX, MX TVs and MCL transcievers.

Or buy an IR receiver directly from B&O. There are also oneremote products that use 455 kHz receivers.

Stefan

tournedos
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pacificocean:
I still have the electronics of a MX7000. Is it possible to use the IR receiver from this TV?

From a quick glance that seems quite difficult; the IR receiver front end is on the transceiver board at the front corner of the TV, while the demodulator is on the CPU board which is quite large. You might be better off buying a transceiver from fleaBay.

The B&O receivers - built from a good handful of discrete components - are actually quite a bit more sensitive than the TSOP7000 single chip solution was . Lintronic currently seems to use the newr B&O "hockey puck" transceiver.

--mika

pacificocean
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I now have a MCL transceiver from an xtra speaker kit http://www.beoworld.org/prod_details.asp?pid=974 However in the manual it is not described which wire color is used for which signal. Also on http://www.beoworld.org/beotech/wiring3.htm are only the wire colors mentioned. Does anyone know which wire color is used for which signal?

Guy
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Guy replied on Fri, Aug 9 2013 3:59 PM

I think this is correct:

Ground          -           Brown

+ 5v                -          Green

IR Data          -          Yellow

 

Serial Data    -           White

Serial Clock  -           Grey

pacificocean
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Thanks Guy, where did you get this information from?

Guy
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Guy replied on Mon, Aug 12 2013 9:09 PM

I worked these out by looking at circuit diagrams of various B&O kit (the IR input stage) when trying to modify a VX sensor for use as a ML sensor - it worked with the listed colours.

The Brown, Green, Yellow are definitely right - they worked for me.  I am not totally sure where I found the other two!!

Guy
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Guy replied on Mon, Aug 12 2013 9:15 PM

... also I think that at least Ground (Brown), +5v (Green) and Serial Data (White) are labelled alongside the terminal strip inside the MCL2A and MCL2AV boxes.  There's only the colours labelled for Grey and Yellow.

pacificocean
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Thanks again. However I do not have the MCLAV box. So I am not able to verify this.

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