i remember the term symbol as equated to a state change. in modulation
techniques where
1 symbol = 1 bit, the symbol rate and the bit rate are the same. some
modulation
techniques can yield multiple bits from a single symbol. qpsk (quaternary
phase shift
keying) is a form of phase angle modulation used in rf where 1 symbol = 2
data bits. so
the symbol rate is 1/2 the bit rate (23 megasymbols per second = 46mbps).
Priscilla Oppenheimer wrote:
> The original 10-Mbps Ethernet II and 802.3 standards use Manchester
> encoding for all media types. Manchester encoding specifies that a bit
> period is divided into two equal intervals and there is always a transition
> from either high to low or low to high in the middle of the bit period. A
> binary zero is high first and then low. A binary one is low first and then
> high. I haven't heard these called symbols, but perhaps your reference
> calls them symbols.
>
> Priscilla
>
> At 07:09 PM 5/31/01, hal9001 wrote:
> >Thanx for that any idea about the symbols?
> >
> >Karl
> >----- Original Message -----
> >From: "Fred Ingham"
> >To: "hal9001" ;
> >Sent: Thursday, May 31, 2001 11:45 AM
> >Subject: Re: Manchester symbols [7:6655]
> >
> >
> > > Manchester encoding is used on 10 Mbps Ethernet, Differential
Manchester
> > > encoding is used on token ring.
> > >
> > > Fred.
> > >
> > > hal9001 wrote:
> > > >
> > > > Something to do with Ethernet Encoding I fink...anyone else?
> > > >
> > > > Karl
> > > > ----- Original Message -----
> > > > From: "g_study"
> > > > To:
> > > > Sent: Thursday, May 31, 2001 9:07 PM
> > > > Subject: Manchester symbols [7:6655]
> > > >
> > > > > What are Manchester symbols?
> ________________________
>
> Priscilla Oppenheimer
> http://www.priscilla.com
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=6835&t=6655
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