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CS Loopback

SENKO’S CS® Loopback is designed to provide a media of return patch for a fiber optic signal. Commonly used for burn-in testing and network troubleshooting, the high density push-pull tab design will fit into may applications.

  • High Density Design
  • UPC and APC polish
  • Attenuation levels from 1-10dB
  • Push-Pull tab for easy installation
Parameters Single-mode Multimode
SM Premium Low Loss SM Premium SM Premium Low Loss SM Premium Premium
Typical Return Loss (dB) ≥55 ≥65 ≥25
Attenuation Tolerance 0dB: -0/+.5dB, 1-5dB: +/-.5dB, 6-10dB: +/-1dB
Operational Wavelengths (nm) SM: 1310/1550 +/-40 MM: 850/1300 +/-40
Operating Temperature (°C) – 40 to +75
Maxium Power Input (mW) 500

Data Center




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The CS loopback can be used in temperatures as low as -40°C and up to 75°C.

The loopback is rated for up to 500mw if properly cleaned and maintained.