Signal/Noise Ratio (SNR) defines the optical performance of an OTDR.
Exfo FTB-730-NS1493, #606xxx
Dynamic range >40dB
Same link, 1310nm, 5ns, 30s
Performance
Tribrer APL-2+AOR502T2C-SCA, #12542000xxxxx
Dynamic range >40dB
Same link, 1310nm, 5ns, 30s
Excellent performance
Viavi OTDR MTS-4000-4106MA2, #52xx
Dynamic range >40dB
Same link, 1310nm, 5ns, 30s
Excellent performance
Anritsu OTDR MU100010A 10G, #6D6000xxx
Dynamic range >40dB
Same link, 1310nm, 3ns, 30s
Good performance