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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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In Reply to: RE: Digital coax cable posted by scriabin on July 16, 2024 at 17:39:15:
Abe, This link is a AXPONA two part lecture by Galen Gareis of Belden. I contacted Blue Jeans about digital cable length. Blue Jeans and Galen Gareis replied back to me. (I mis-spoke as the length is a meter or longer).
This should be part 2 - Start at 12 minutes and continue listening through 16 minutes (too short)
https://www.youtube.com/watch?v=gImRFQ4xsM0&t=1s
Here is Galen's reply to me.
Hi Steve,
Keep the SPDIF cable a meter or longer and you'll be fine. True that digital is high enough frequency that it has RL (load mis-match) and SRL (cable geometry variations) to manage. Better quality cable can be shorter as it has better center impedance for RL and a better geometry stability for SRL.
Attached is the bulk cable spec we use for serial digital, and it has excellent RL measured into a FIXED 75-OHMS LOAD. This is worst case as the SRL will make it worse if the cable center impedance is off 75-ohm.
Best,
Galen
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Follow Ups
- RE: Digital coax cable - scriabin 14:30:32 07/17/24 (1)
- Thanks! - AbeCollins 06:50:58 07/18/24 (0)
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