Ultimately, it depends on the sensitivity of the receiver, the type of interface, and the coding used, which translates into signal-to-noise ratio. * First, define the required signal-to-noise ratio @ 500 Hz. o The signal-to-noise ratio will depend upon whether the signal is digital/analog, single-ended/differential. * Second, determine all potential sources of noise and crosstalk @ 500 Hz. o Trace-to-trace on same layer o Trace-to-trace on multiple layers o Trace-to-trace through planes o Plane-to-plane to trace o etc. Scott McMorrow Teraspeed Consulting Group LLC 121 North River Drive Narragansett, RI 02882 (401) 284-1827 Business (401) 284-1840 Fax http://www.teraspeed.com Teraspeed® is the registered service mark of Teraspeed Consulting Group LLC olaney@xxxxxxxx wrote: > Certainly there is a possibility, but if your sensor is running at 500 Hz > you should be able to discard virtually all crosstalk and interference > with a low pass filter. But, I have to ask: are you talking about 500 Hz > sine waves (for instance from an LVDT), or 500 bursts per second of > digital information. Those are not at all alike, and require different > approaches > > Orin > > On Wed, 28 May 2008 14:22:43 +0530 "Umamaheswar U-TLS,Chennai" > <umamaheswaruk@xxxxxx> writes: > >> Hi all, >> >> >> >> We have a design where 500Hz signals are traveling from external >> sensor >> to the board; in the vicinity of the 500Hz signals, high frequency >> signals and digitals sections are present. So I am concerned with >> the >> signal quality( Crosstalk), is there any possibility that 500Hz >> signals >> get affected due to the nearby high frequency signals. >> >> Do I need to do SI analysis on that board to know the crosstalk, or >> any >> articles or theoretical analysis is sufficient to know the crosstalk >> and >> any guidelines in the PCB layout will work? >> >> >> >> Please help me. >> >> >> >> Thanks in advance[Umamaheswar U-TLS,Chennai] . >> >> >> >> >> >> Thanks& Regards >> >> U.K.UMAMAHESWAR >> >> >> >> >> >> DISCLAIMER: >> >> > ------------------------------------------------------------------------- > ---------------------------------------------- > >> The contents of this e-mail and any attachment(s) are confidential >> and intended for the named recipient(s) only. >> It shall not attach any liability on the originator or HCL or its >> affiliates. 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