GAOTek Transmission Line Testers

GAOTek Transmission Line Testers is a testing instrument carefully developed by our company.




GAOTek Transmission Line Testers is a testing instrument carefully developed by our company. The performance of the instrument is stable and reliable. It is a multi-functional instrument integrating stabilized light source, high-precision power meter, insertion loss test, return loss test, visible red-light source and end face detector. It is widely used in insertion loss and return loss test of optical fiber and cable, optical passive devices and optical fiber communication systems. It is a basic test instrument used by the majority of device manufacturers, scientific research institutions and operators for production testing, research and development and engineering construction and maintenance.



  • Provides insertion loss, return loss, light source, optical power meter other measurement modes
  • Supports multi-wavelength
  • Automatic test and display
  • Portable 5.6 in (14.2 cm) LCD touch screen
  • The threshold and alarm function are configurable
  • Support USB port detector function


Technical Specifications

Wavelength (nm) 1310 nm or 1550 nm (±10) (optional)
output power (dBm) ≥-3 dBm
Spectral width (FWHM) ≤5 nm
Connector type FC or APC
Frequency (HZ) CW, 270 Hz, 1KHz, 2KHz
Power stability (dB) 2 ≤±0.05 (15 min at 77 °F (25 ℃))
Testing range (dB) 0 dB to 75 dB
Display resolution (dB) 0.1 dB
Test accuracy (dB) 3 ±0.5 dB
Detector type InGaAs
wavelength coverage (dBm) 800 dBm to 1700 dBm
Calibration wavelength (nm) 850 nm, 1300 nm, 1270 nm, 1310 nm, 1490 nm, 1550 nm, 1577 nm, 1625 nm
Measuring range (dBm) 50 °F to -94 °F (+10 ℃ to -70 ℃)
Linearity (dB) 4 ±0.15 (+10 dB to -60 dB) dBm
Optical interface FC, SC, ST, LC, 0.09 in, 0.04 in (2.5 mm, 1.25 mm)
Power unit dBm, dB, xW
Resolution ratio (dB) 0.01
Record storage Yes
Wavelength (nm) 650
Output power (mW) 10
Display screen 5.6 in (14.2 cm) TFT color screen
Power supply mode 7.4 V 52000 mAh Lithium battery, power adapter 12 to 19V 2A
Automatic shutdown time Custom optional
Low battery warning icon flash
Communication interface Ethernet port, Micro USB
Working temperature (℃) 14 °F to 140 °F (-10 ℃ to +60 ℃)
Storage temperature (℃) -13 °F to 158 °F (-25 ℃ to +70 ℃)
Size (mm) 10.2 in x 6.1 in x 2.87 in (260 mm x 155 mm x 73 mm)
Weight (g) 2.64 lb. (1200 g)


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