Receiver Loss of Signal Pin. The Receiver Loss of Signal Pin (RX_LOS) is an output pin to the Host, operating with active-high logic. When asserted, it indicates received optical power in the CFP4 module is lower than the expected value. The optical power at which RX_LOS is asserted may be specified by other governing documents and the CFP4 module vendor as the alarm threshold level is application specific. The RX_LOS is the logic OR of the LOS signals from all the input receiving channels in a CFP4 module. This pin can be optionally configured as Programmable Alarm 1 Pin after Reset. One MDIO register which defines if the module supports this optional configuration or not is prepared in NVR region. Please refer to Ref.[3] for more details.
Receiver Loss of Signal Pin. The Receiver Loss of Signal Pin (RX_LOS) is an output pin to the Host, operating with active-high logic. When asserted, it indicates received optical power in the CFP module is lower than the expected value. The optical power at which RX_LOS is asserted may be specified by other governing documents and the CFP module vendor as the alarm threshold level is application specific. The RX_LOS is the logic OR of the LOS signals from all the input receiving channels in a CFP module. Optical Input RX_LOS Output t_loss_on t_loss_off Figure 2-3: Receiver Loss of Signal Timing Diagram
Receiver Loss of Signal Pin. 20 The Receiver Loss of Signal Pin (RX_LOS) is an output pin to the Host, operating with active -high logic.
