SVA1 Single-mode Variable Attenuator


  • Single-mode attenuator for a wide range of wavelengths
  • Lightweight, robust, designed for field applications
  • 60 dB dynamic range
  • Coarse and fine adjustments
  • Swappable (FC, ST, SC, LC) adapters remove for cleaning


  • BER testing
  • System tolerance to signal attenuation
  • New equipment activations



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60 dB Variable Single-mode Attenuation

The SVA1 Single-mode Variable Attenuator advances fiber optic field testing by offering superior performance in a low cost hand-held package. Utilizing a simplified, industry accepted attenuation technique; the innovative design of the SVA1 offers superior resolution across the entire 60 dB dynamic range.

Intended for field testing during installation, new equipment turn-ups, or routine maintenance, the SVA1 is a complete, easy to use attenuator. Its unique features allow bidirectional signal transmission with no loss penalty.

Never be caught with low or discharged batteries!  

The mechanical design of the SVA1 uses no batteries - it is always ready when you need it.
Input/output ports of the SVA1 are equipped with tool-free removable adapters to allow the output connectors to be inspected and cleaned.
The SVA1 is available with a variety of connectors and reflectance options to better than 60 dB. With only two adjustments, COARSE and FINE, the SVA 1 is simple to understand and operate. The SVA1 is suited for all single-mode applications including Telco, LANs, WANs, Video, and CATV.

Key Specifications

  • Optics: 9/125 µm single-mode
  • Measurement Range: 1.5 – 60 dB
  • Return Loss: 50 dB (≥60 dB optional – angled FC) 
  • Connector Adapters available: FC, SC, ST, LC

Model Number: SVA1

SVA1 Accessories and Connector Adapters

FC adapter
SC adapter
ST adapter
LC adapter
Universal flip-top dust cap for UCI outputs

Prepaid Calibration Plans

2 Year Cal Plan for SVA1
2 Year Cal Plus Plan for SVA1
For details see the Prepaid Calibrations and Calibration Plus plans product page