Juniper BT8A78CH1, Hardware Overview And Installation Manual

Page: 143 / 228

Figure 46: Block Diagram
This topic includes the following information:
• C-Band on page 143
• OSC on page 143
•
Monitoring Points on page 143
•
96-Channel Fixed Mux/Demux Specifications on page 144
• Installing a 96-Channel Fixed Mux/Demux (BT8A78MD03) on page 145
• Removing an FMD96 on page 150
C-Band
In the line-in direction, the incoming C-band channels from the L1 port are demultiplexed
into individual wavelengths for output onto the respective client ports.
In the client-in direction, the individual C-band channels are multiplexed onto a composite
signal for output on the L1 port.
OSC
The FMD96 does not process the OSC signal from the attached ROADM module. Instead,
the FMD96 demultiplexes the OSC signal from the composite signal on the L1-In port
and multiplexes it back into the composite signal for output on the L1-Out port. This
allows the connected ROADM module to detect the presence of the FMD96 if applicable.
Monitoring Points
The FMD96 provides diagnostic equipment (connected to the MON port), monitoring
access to internal blocks.
In the line-in direction, the monitoring point is at the input to the demultiplexing stage
after the OSC signal has been extracted. In the line-out direction, the monitoring point
is at the output of the multiplexing stage before the OSC signal is multiplexed back in.
143 Copyright © 2019, Juniper Networks, Inc.
Chapter 5: BTI7800 Series Modules