[SI-LIST] Re: Inexpensive TDR for short/open localizing on a PCB
- From: Doug Smith <doug@xxxxxxxxxx>
- To: Jerry Martinson <jmartinson@xxxxxxxxxxxxxxxxx>
- Date: Thu, 03 May 2007 09:28:44 -0700
Hi Jerry and the group,
You probably have a fast scope around and possibly a fast pulse
generator. If you do, you could probably use these to achieve a TDR
function since you are not trying to make accurate impedance measurements.
The later Agilent scopes have an output on the front panel furnishing
a 300 mV pulse with a ~100 ps risetime that might work.
Doug
Lee Ritchey wrote:
> Jerry,
>
> The least expensive TDR I know of that will suit you purpose is the
> Tektronix 1502C.
>
> Lee
>
>
>
>>[Original Message]
>>From: Jerry Martinson <jmartinson@xxxxxxxxxxxxxxxxx>
>>To: si-list <si-list@xxxxxxxxxxxxx>
>>Date: 5/2/2007 10:54:14 AM
>>Subject: [SI-LIST] Inexpensive TDR for short/open localizing on a PCB
>>
>>Sorry if this seems a bit off-topic.
>>
>>
>>Does anybody know of an inexpensive and easy-to-use TDR system that's
>>good enough to localize PCB assembly shorts and open with accuracy that
>>translates into about 1 inch on a trace? I'm trying to see if I can
>>find something that can help out with the old "which chip to replace"
>>problem during assembly debug as often BGA x-rays are ambiguous.
>>
>>
>>
>>Jerry Martinson
>>
>>ARUBA NETWORKS
>>
>>(work 408-754-3037) (cell 408-394-5185)
>>
>>jmartinson@xxxxxxxxxxxxxxxxx
>>
>>1322 Crossman, Sunnyvale, CA 94089
>>
>>
>>
>>
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>
>
>
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