RE: Re: IRDA Repeater

["Ian B" <Ian@xxxxxxx>]

Thanks for the info Li. The two you mentioned below - what are their good
and bad points and are they suitably for looking at IRDA stuff. Is it best
if I give you a quick call after watching my daughter's ballet recital
(groan).

Thanks

Ian

> -----Original Message-----
> From: K. C. Li [mailto:li@xxxxxxx]
> Sent: 30 November 2001 19:02
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Re: IRDA Repeater
>
>
> On Fri, 30 Nov 2001, Ian B wrote:
>
> > Li, any rule of thumb I should follow as I only know the front
> cos that's
> > where the screen and knobs are!!
>
> In addition to what Keith has mentioned, you might like to consider
what
> is the maximum sampling rate required. Nyquist's theorem roughly
states
> that the sample rate must be at least twice the input bandwidth for
> accurate observation. eg. A 10MHz signal would require a 20MHz
bandwidth
> scope to observe properly.
>
> One thing to bear in mind when considering the purchase of digital
storage
> oscilloscopes (DSO) is that they are usually quoted in samples per
second.
> This is not the bandwidth of the scope but merely the number of
samples it
> is capable of taking in a second. The effective bandwidth is much
lower.
> There are a number of PC parallel port scopes being quoted as 100MSa/s
> when the PC's parallel port would be struggling to reach speeds of
over
> 1MSa/s (in bytes). They are no good for real-time waveform
observations at
> rates greater than 1MSa/s. A DSO does allow the "storage" of
a section of
> waveform for display on the PC.
>
> Regards,
>
> Kwong Li
> li@xxxxxxx
> Laser Business Systems Ltd.
> http://www.laser.com
>
>
>
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