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gmittal
Joined: 28 Dec 2007
Posts: 24
Helped: 6
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 28 Jul 2008 16:43 Testing Point on high speeed (500MHz) signal trace |
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Hi All,
I want to put some testing point on some of the high speed signal trace (500 MHz ). I don't want to connect header pins in between of the traces because that's going to effect the signal strength, So I was just wondering is there a better way or any recommendation so I can insert testing points on these 500 MHz signal trace.
Thanks in advance
Gaurav
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TraceRouter
Joined: 02 Aug 2005
Posts: 118
Helped: 14
Location: Wichita, KS
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| 28 Jul 2008 17:27 Re: Testing Point on high speeed (500MHz) signal trace |
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| If the traces are on the outside of the board, look at a new technology from Agilent called Bead Probes. You have to get a license from Agilent to use this technology, but I do believe it is a no cost license. Here is a link to some documents that can explain it better than I can: Agilent Bead Probes
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gmittal
Joined: 28 Dec 2007
Posts: 24
Helped: 6
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| 28 Jul 2008 17:47 Re: Testing Point on high speeed (500MHz) signal trace |
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Thanks for your reply but the thing is that all these signals are routed on internal layers due to impedance requirement and trace width constraint.
The IC's used belongs to the BGA family . So I cannot place these Bead probe on the fanout either.
Is there any other way ?
Thanks
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TraceRouter
Joined: 02 Aug 2005
Posts: 118
Helped: 14
Location: Wichita, KS
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| 29 Jul 2008 13:44 Testing Point on high speeed (500MHz) signal trace |
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| You could probe the vias that come off of your fanout. What is the pitch on your BGA?
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gmittal
Joined: 28 Dec 2007
Posts: 24
Helped: 6
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| 29 Jul 2008 13:54 Re: Testing Point on high speeed (500MHz) signal trace |
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| The pitch of the BGA is 1 mm . Can I directly put the probes on these vias to capture the waveform on the oscilloscope
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