Cisco Model 6940 Four Port Optoelectronic Node 870 MHz with 55 70 MHz Split 数据表

 

 

 

The Model 6940 Collector/Terminator Node is a three port 
unbalanced node of the Prisma

®

 Model 6940 Node family, 

specially designed for the collector / terminator architecture. 

 

In the forward path, the high gain optical receiver in both the 
collector node and the terminator node accepts 1310 and 
1550 nm wavelength optical inputs and provides forward RF 
output to the launch amplifier module.  The launch amplifier 
has three unbalanced forward RF outputs, one of which has a 
5 dB higher level than the other two. 

 

In the reverse path, the launch amplifier in both the collector 
node and the terminator node has three reverse RF inputs fed 
from the HFC plant.  The three RF inputs to the terminator 
node are combined and amplified in the launch amplifier and 
routed to an RF output port.  The RF output is routed to the 
collector node through an operator-installed, hard-line coaxial 
cable.  The collector node combines this RF signal with its 
three reverse input signals.  The combined reverse signals from both the terminator and collector node are 
amplified and routed to the collector node’s reverse transmitter for optical transmission to the headend or hubsite

. 

 

The Model 6940 Collector/Terminator Node utilizes a standard Model 6940 Node housing.  The housing 
incorporates many features that enhance ease of use and reliability, such as a separate AC powering port, optional 
redundant power supply, and extended ports to allow for easy heat shrink weather protection. 

 

The Model 6940 Collector/Terminator Node can also be configured with a Scientific-Atlanta status monitoring 
transponder.  The transponder, in conjunction with ROSA

®

 / TNCS or other compatible element management 

system, enables remote monitoring of critical node related parameters, and remote control of each optional reverse 
path switch for ingress troubleshooting.

 

 

•  1 GHz RF platform  
•  One high level and two low level forward RF outputs 
•  Reverse transmitter in the collector node transmits reverse signals originating in the RF plant feeding both the 

collector node and the terminator node 

•  Collector node easily converted to terminator note and vice-versa 
•  15 amperes continuous power passing 
•  Screwless seizures for ease of connector installation 
•  40-90 V AC high-efficiency switch mode power supply 
•  Optional power supply redundancy 
•  Local test points and LED indicators on optical receivers and transmitters simplify installation and maintenance  
•  Optional status monitoring and control (status monitoring transponder and TNCS or other compatible element 

management system required) 

•  Plug-in pads provide individual level control for each port for forward and reverse paths 
•  Optional 3-state reverse switch (on/off/-6 dB) allows each reverse input to be isolated for noise and ingress 

troubleshooting (status monitoring transponder and ROSA / TNCS required) 

•  Fiber management tray provides convenient fiber and connector storage for up to 6 connector pairs 
•  1310 nm analog reverse transmitters with either Fabry-Perot or DFB lasers