insertino loss and return loss test machine

Built-in light source:1310/1550nm or 1490/1550nm
Output optical power:≥-4dBm
Cal wavelength:1310nm、1550nm]
Note:① For a typical application, add ±0.4dB for readings between –60dB and -67dB; add ±0.8 dB for readings between –67dB and -72dB; add ±1.5dB for readings between –72dB and -75dB.
② Reference conditions: fiber core≤50μm，NA≤0.2，wavelength 1310nm，power level -23dBm, CW light
③ Ambient temperature: 18～28℃,constant; 0～50℃constant，±0.05dB