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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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