WR-1004MLD Outdoor Optical Node Operation and Maintenance Manual
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1. Product Summary
WR-1004MLD
outdoor optical node can be configured 2 forward path optical receiver modules, 2
return path optical transmitter modules, 1 Ethernet transponder module and 2 switching power
supply modules at most. Adopts advanced optical AGC technology, the adjustment of output level
and output slope both adopt fixed inserter. Add LED nixie tube display function, can output 4-way
forward path signal (
≥
108dBμV) at most.
2. Performance Characteristics
Forward path optical receiving part adopts advanced optical AGC technology, the input optical
power range extended to -8
～
+2dBm.
Forward path optical receiving part: RF operating bandwidth extended to 1GHz, each way
maximum output level up to 114dBμv.
The attenuation and equilibrium control circuit adopts fixed inserter, and achieve remote
monitoring by NMS.
RF amplifier part adopts quick plug modular design, can quickly replace RF amplifier module
without dismantling the RF cable connector.
Built-in perfect condition monitoring circuit, and support Ethernet transponder.
Built-in tri-state gate switch circuit in the return path. Three states passthrough, -6dB and OFF
can be remote set by network management responder.
Reserved C-CMTS forward path and return path RF interface, support DOCSIS EOC
networking scheme.
3. Technique Parameter
3.1 Link Testing Conditions
The performance parameters of this manual according to the measuring method of GY/T 194-2003
< Specifications and methods of measurement on optical node used in CATV systems >, and tested
in the following conditions.
1.
Forward optical receive part: with 10km standard optical fiber, passive optical attenuator and
standard optical transmitter composed the testing link. Set 59 PAL-D analog TV channel signal at
range of 45/87MHz
～
550MHz under the specified link loss. Transmit digital modulation signal at
range of 550MHz
～
862/1003MHz, the digital modulation signal level (in 8 MHz bandwidth) is
10dB lower than analog signal carrier level. When the input optical power of optical receiver is
-1dBm, the RF output level is 108dBμV
independent output, with 8dB output tilt, measure the
C/CTB, C/CSO and C/N.
2.
Return optical transmit part: Link flatness and NPR dynamic range are the link indexes which
is composed of return path optical transmitter and optical receiver.
Note:
When the rated output level is the system full configuration and the receiving optical power is
-1dBm, equipment meets the maximum output level of link index. When the system configuration
degrade (that is, the actual transmission channels reduce), the output level of equipment will be
increased.
Friendly Notice
: Suggest you setting the RF signal to 6~9dB slope output in the practical
engineering application to improve the nonlinear index (behind the node) of the cable system.
