GAOTek SM Optical Variable Attenuation

This SM Optical Variable Attenuation has an attenuating range of 40 dB, a return loss of >40 dB and a max input power of less than +21 dBm.




  • Most compact and rugged portable attenuator on the market
  • Three wavelengths 1310 nm or 1490 nm or 1550 nm
  • Different attenuator range, 40 dB, 60 dB or 80 dB.
  • Can save current value as reference
  • Can save 10 tracks attenuation value
  • Memorize the value after instruments shut down
  • Energy save mode
  • One-year warranty and Three-year recommended calibration interval


Technical specifications

Attenuating Range 40 dB (SM)
Calibrated Wavelengths 1310 nm or 1490 nm or 1550 nm
Attenuating Mode Digital
Display Resolving Power 0.1 dB
Display LCD, 128 x 64
Max Input Power <+21 dBm
Return Loss >40 dB
Insertion Loss <2.5 dB
Uncertainty ±0.5 dB
Repeatability ±0.2 dB
RS-232 Optional
Auto Power Off No operation in 10 min (can be canceled), Low battery energy
Battery Charge Yes
Operate Time Above 20 hrs
Power Supply 3 x AA batteries or AC or DC adapter


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