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Philips Pronto Classic Forum - View Post
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The following page was printed from RemoteCentral.com:
| Topic: | RF extender and 455KHz carrier This thread has 19 replies. Displaying posts 16 through 20. |
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| Post 16 made on Friday May 16, 2003 at 07:35 |
Eigeny Oulianov Founding Member |
Joined:
Posts: | October 2001
238 |
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.When you use IR - do you make it via ProntoPro directly?
.When you try RF - do you use a small IR probe glued to Lexel IR receiver glass or a RF extender directly, without IR emitters?
Try to use RF extender itself (at the place where ProntoPro was previously works) - it is a chance that glued IR probe lights too brightly.
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| OP | Post 17 made on Saturday May 17, 2003 at 04:42 |
Hi Eigeny.
Yesterday I got an osciloscope and I've tested my RF extender.
Finally I've found which is the problem. I programed very simple pulses 200µS on and 400µS off, carrier 455KHz and I saw that (in RF extender output) carrier low period can't arraive to 0 Volt, wave moves from +4V (high period)to +3.5V (low period) this obviously durig 200µS on state, the rest 400µS wave got 0V.
I decreased carrier to 300KHz and low period was ok (arraives to 1V).
Seems then that ploblem is bandwith of my RF extender. Philips says that max. carrier freq. is 550KHz so that means that mine is broken or specs of extender are wrong.
Thaks everybody for cooperation.
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| Post 18 made on Saturday May 17, 2003 at 06:36 |
Dave Houston RF Expert |
Joined:
Posts: | October 2001
1,521 |
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Very interesting.
Given that the RF transmission from the Pronto to the extender always uses a 433.92MHz carrier, it would appear that the problem cannot be on the RF side.
Are you able to get your scope on the output of the RF receiver section? It would be interesting to compare the demodulated data envelope from the RF receiver with the burst pattern programmed into the Pronto.
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| Post 19 made on Friday October 10, 2003 at 13:07 |
benjaminfry Lurking Member |
Joined:
Posts: | October 2003
5 |
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I also have a light IR controled by 455 khz. I am trying to get my pronto 960 to learn and reproduce it. am i wasting my time? i have the latest firmware but it doesn't seem to make any difference.
ta.
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| Post 20 made on Thursday October 16, 2003 at 15:34 |
tbchurch Founding Member |
Joined:
Posts: | August 2001
20 |
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I have had issues where all other devices, except one, work when the remote is changed from IR to RF mode, where they previously ALL worked from the remote in IR mode.
The thing that worked for me was to change the channel and extender number. We were using an Onkyo Chad, and had to switch it from "device 0, extender 1" to "device 3, extender F". Then it worked. It made no sense, but something in one particular IR code conflicted with the RF carrier somehow until we chose another RF channel.
I hope you tried this.
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