Measuring Digital Cables - Belden 1694A

House de Kris

Loud-n-Deep
Another cable from DKak. This is a 3ft. cable made of Belden 1694A cable terminated with 75ohm BNC connectors. Not sure who made this cable. The cable was marked with a directional cable which I respected for these measurements.

The TDR shows an increadibly flat impedance at 75.22ohms. The network analyzer indicates that the -3dB point is 6.9GHz. On the side of the cable Belden has marked it as being 4.5GHz bandwidth. Further support that the cabling industry doesn't define bandwidth as the -3dB point as speculated in another "Measuring Digital Cables" thread. My measured -1dB point is 1.3GHz.
 

Attachments

  • Belden1694A_TDR.GIF
    Belden1694A_TDR.GIF
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  • Belden1694A_FR.JPG
    Belden1694A_FR.JPG
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