EXFO FTB-8500 Series for FTB-500 - Manual (Page 152)

Port Tabs
138 FTB-8500 Series and FTB-8120NGE/8130NGE
Optical RX
Optical RX
Press TEST, Port, and Optical RX.
Signal Analysis

Power Level (dBm): Indicates the power level of the input signal in
dBm.

Input Presence: Indicates if there is a valid signal at the input port
(green) or not (grey).
Alarm Analysis

LOS (Loss Of Signal): A LOS indicates that there is no input signal.

Frequency: The frequency alarm indicates that the received signal rate
meets the standard rate specifications (green) or not (red).
Interface Standard Rate Specification
100 Mbps FTB-8510B: 0.125 Gbps ± 12.5 Kbps (±100 ppm)
FTB-8120NGE/FTB-8130NGE/FTB-8525/FTB-8525:
0.125 Gbps ± 15 Kbps (±120 ppm)
1000 Mbps FTB-8510B: 1.25 Gbps ± 125 Kbps (±100 ppm)
FTB-8120NGE/FTB-8130NGE/FTB-8525/FTB-8525:
1.25 Gbps ± 150 Kbps (±120 ppm)
10 Gig-E LAN FTB-8510G: 10.3125 Gbps ± 1031.25 Kbps (±100 ppm)
FTB-8120NGE/FTB-8130NGE/FTB-8525/FTB-8525:
10.3125 Gbps ± 1392.1875 Kbps (±135 ppm)