Re: IRDA Repeater

["Keith Doxey" <ukha@xxxxxxx>]

Hi Ian,

I will take a look at that link.

Oscilloscope - I "aquired" mine. I have two, a Single beam 5MHz
scope=20
that I use for everything and a no-name dual beam that has a fault on=20
it. It needs to warm up for about a week before it works properly. I=20
do have the diagrams for it somewhere but dont have the time to fault=20
find. It should be possible to get a decent basic scope for about=20
=A3300. Rapid have the "7020" for 269+vat which is a 20MHz dual
trace=20
scope. They also have the "7040" dual trace 40MHz for 425+vat.

You can get modules that attach to a PC but you need a high spec PC=20
to get a low spec scope and you have to be VERY careful about high=20
voltages or you will need a new PC. You can get PC scopes from under=20
=A3100 but they wont sample fast enough to see IRDA stuff.

Keith


--- In ukha_d@y..., "Ian B" <Ian@M...> wrote:
> Hi Keith
>=20
> I have been learning a bit about the IRDA format and have learnt the
> following.
>=20
> The IRDA protocol is as you say  short range one but in addition to=20
this it
> is also a low power one in the computer world. This means the time=20
to
> transmit 1 bit value 1 would be x. With IRDA this value is only=20
sent as a 1
> for say 1/4 x and the remaining time there is no transmission. This=20
cuts
> down on power consumption but makes decoding and retransmitting it=20
a little
> more of a challenge. More information for those interested at
> http://dbserv.maxim-ic.com/appnotes.cfm?appnote_number=3D631
>=20
> Quite how all this relates to remotes I am not sure.
>=20
> Ian (still saving for a descent scope)
>=20
> p.s. Keith, any recommendations for a scope within a mortals price=20
range?
>=20