Hi All
Today i
started to do some real life testing of the multizone ir unit.
As some of you would know things working on a
bench and things working in the real world can (and usually are ) be two
different stories.
Firstly the bad news , My idea of a Ir Blocker
(stick on emitter) no good. Im glad i didnt call it stick on cause it didnt
so
will have to revisit that one....Anybody tried this ?,maybe look at Keiths
again.
When i got the multzone rx unit working
i
was using my panasonic dvd as a testbed and was tx/rx vol up ,vol
down +
mute commands ,worked fine. So i saved all buttons that i thought i
would use. Guess which ones didnt work ...vol up and down. When i pressed
these two the dvd would power down . Tried relearning no good . Relearned
the
power on ...that fixed it (thank god). Ieventually got the vol up and down
to
work by resetting the tolerence setting which i fiddled with at some stage
(
left it on 8).
Next one to get me
was ,
i decided to transmit commands via the ir test menu in homevision . When it
transmitted i noticed the ir rx active led (yellow) pulsed with the tx data
.
My initial thoughts were that there was some bleed from the ir blocker
(emitter) and moved the zone rx unit to top of the tv. Still same problem .
Disconnected the ir blocker and transmitted , all ok ,inserted a dummy jack
(normal led) into zone splitter and transmiited again. Problem back again
.
The Tx signal is getting
induced into the Rx unit but at this stage only effecting the ir
_active
circuit .This VALIDATES what KEN WATTS has been saying recently about ir rx
signals in with other transmitting type signals. I will keep an eye on this
one and if necessary run my tx signals via speaker cable.
Now some good news
At this stage i have only 1 zone
connected and working and seeing my little shack is small i have the
signals
tx and rx going thru an almost full drum of cat 5 (approx 200metres +) and
im
operating my dvd player listening to my favorite band ROXY MUSIC no problem
(okay so im an old fogie) . I will get my circuit by my friend John to
have a look at my designs ,as i would like to ensure that long runs
dont
effect the signals and hes got heaps of experience with comms and that.
Unitl
then testing and more testing.
Sorry for the long
post.....
Frank Mc
For more
information: http://www.automatedhome.co.uk
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