[SI-LIST] Re: RF board Vs High speed board
- From: "Andrew Ingraham" <a.ingraham@xxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Wed, 24 Aug 2005 13:36:19 -0400
> your car radio is a good example - carrier is around
> 100kHz, bandwidth is around 20kHz.
Lynne, that is probably a typo, I think you meant to write 100 MHz (FM
broadcast band). But not every case of RF has such a large difference.
Another big difference between RF and high speed digital, is the old analog
vs. digital one. The consumers of RF signals typically have a wide dynamic
range of interest, such that attention to detail and to every low-level
interfering in-band signal is crucial; whereas digital signals can usually
tolerate greater levels of noise and interference without degradation.
Thus, getting the grounding and shielding right, may be more important for
RF boards than on some high speed digital boards.
On the other hand, for various reasons, some digital signals are more likely
to cause interference to neighbors. There are many variations on these
themes.
Regards,
Andy
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