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From: PeteS on 27 Nov 2006 17:23
lerameur wrote:
>>> thank you
>>>
>>> ken
>> Looks to me as if the data have been encoded in some way. Check your
>> docs for encoding implementations.
>
> There is no encoding, just a simple serialout at the transmitter and
> serialin at the receiving end.
>
> k
>
Be that as it may, the scope trace shows the data output following
certain transitions on the input, but not following the data. What is
interesting, however, is the transitions are not delayed particularly,
so there's a decent link apparently.

This is a case of read the manuals for everything that's connected.

Cheers

PeteS
From: Andrew Holme on 27 Nov 2006 17:48

"lerameur" <lerameur(a)yahoo.com> wrote in message
news:1164589146.605543.305610(a)l12g2000cwl.googlegroups.com...
> Hi,
>
> I received this TWS-434A/RWS-434 8-Bit RF Combo Package and been
> playing with it. I am sending and receiving using pics.
> My sending signal somewhat differs with my receiving signal. I hook up
> both signals on the oscilloscope and I get this clear but different
> signal, Here is a picture I posted of the signal:
> http://www3.sympatico.ca/lerameur/
> It seems that the receiving signal cannot stay on more then 125ms,
> anyone can tell me why and how to fix it ?
> the baud rate on the pic chip is at 2400 and the frequency if the
> signal is at 433mhz as mentionned above
>
> thank you
>
> ken
>

Have you got the baud rate wrong? 125ms is a long time. A start bit plus 8
data bits only lasts 9/2400=3.75ms at 2400 baud.


From: Baron on 27 Nov 2006 19:21
lerameur wrote:

>
> Baron a écrit :
>
>> lerameur wrote:
>>
>> > HI,
>> >
>> > I just started to play with wireless transmision. I used this kit
>> > that I ordered:
>> > http://www.rentron.com/remote_control/TWS-8-bit-combo.htm
>> >
>> > I do get a signal at the receiver but I do not know how to
>> > interpret
>> > it or how to fix it. The signal is clear but not the same as the
>> > one I sent. I posted a picture of both signal
>> > http://www3.sympatico.ca/lerameur/
>> >
>> > can somebody tell me why the receiving signal is not identical?
>> > it seems the receiving signal cannot stay on more then 125ms
>> >
>> > I am using a pic chip transfering at 2400bps, signal propagation
>> > at 433Mhz
>> >
>> > thanks
>> >
>> > Ken
>>
>> It looks like its synchronising on the leading edge and the data is
>> the next pulse/s in the time frame before the next sync.
>
> well I am just using a simple command at the receiver using picbasic
> pro:
> B0 var byte
> start:
> serin2 PORTB.3,n2400,[B0]
>
> same speed the transmitter.
>
> Ken

Just passing an observation based on the picture you posted. Does it
look the same if you pass several cycles of data ?

--
Baron:
From: lerameur on 27 Nov 2006 21:41

Baron a écrit :

> lerameur wrote:
>
> >
> > Baron a écrit :
> >
> >> lerameur wrote:
> >>
> >> > HI,
> >> >
> >> > I just started to play with wireless transmision. I used this kit
> >> > that I ordered:
> >> > http://www.rentron.com/remote_control/TWS-8-bit-combo.htm
> >> >
> >> > I do get a signal at the receiver but I do not know how to
> >> > interpret
> >> > it or how to fix it. The signal is clear but not the same as the
> >> > one I sent. I posted a picture of both signal
> >> > http://www3.sympatico.ca/lerameur/
> >> >
> >> > can somebody tell me why the receiving signal is not identical?
> >> > it seems the receiving signal cannot stay on more then 125ms
> >> >
> >> > I am using a pic chip transfering at 2400bps, signal propagation
> >> > at 433Mhz
> >> >
> >> > thanks
> >> >
> >> > Ken
> >>
> >> It looks like its synchronising on the leading edge and the data is
> >> the next pulse/s in the time frame before the next sync.
> >
> > well I am just using a simple command at the receiver using picbasic
> > pro:
> > B0 var byte
> > start:
> > serin2 PORTB.3,n2400,[B0]
> >
> > same speed the transmitter.
> >
> > Ken
>
> Just passing an observation based on the picture you posted. Does it
> look the same if you pass several cycles of data ?
>

HI I change to 4800 B to 9600, putting several data in the cycle, I
still get the same result

k

From: Baron on 28 Nov 2006 17:25
lerameur wrote:

>
> Baron a écrit :
>
>> lerameur wrote:
>>
>> >
>> > Baron a écrit :
>> >
>> >> lerameur wrote:
>> >>
>> >> > HI,
>> >> >
>> >> > I just started to play with wireless transmision. I used this
>> >> > kit that I ordered:
>> >> > http://www.rentron.com/remote_control/TWS-8-bit-combo.htm
>> >> >
>> >> > I do get a signal at the receiver but I do not know how to
>> >> > interpret
>> >> > it or how to fix it. The signal is clear but not the same as the
>> >> > one I sent. I posted a picture of both signal
>> >> > http://www3.sympatico.ca/lerameur/
>> >> >
>> >> > can somebody tell me why the receiving signal is not identical?
>> >> > it seems the receiving signal cannot stay on more then 125ms
>> >> >
>> >> > I am using a pic chip transfering at 2400bps, signal propagation
>> >> > at 433Mhz
>> >> >
>> >> > thanks
>> >> >
>> >> > Ken
>> >>
>> >> It looks like its synchronising on the leading edge and the data
>> >> is the next pulse/s in the time frame before the next sync.
>> >
>> > well I am just using a simple command at the receiver using
>> > picbasic pro:
>> > B0 var byte
>> > start:
>> > serin2 PORTB.3,n2400,[B0]
>> >
>> > same speed the transmitter.
>> >
>> > Ken
>>
>> Just passing an observation based on the picture you posted. Does it
>> look the same if you pass several cycles of data ?
>>
>
> HI I change to 4800 B to 9600, putting several data in the cycle, I
> still get the same result
>
> k

Sorry Ken! Nothing useful to offer!

--
Baron:
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