Product Overview

The QAMnet cNode-4 series outdoor optical platform is designed for wide array of HFC networks architectures. It is ideal for a conventional HFC system installation. With 4 RF output ports, each with output level of 50 dBmV available, cNode-4 can be used to reach deep into of the coax distribution network.

The cNode-4 utilizes a highly linear amplifier module to provide excellent CSO, CTB and CNR performance. The standard configuration cNode-4 carries two sets of forward path receivers and return path transmitters (one set as primary and the other set as redundant) to provide extreme reliability. The return path transmitter can be ordered with 1310 nm laser or 1 of 8 available CWDM laser wavelengths.

Applications

• HFC

Features

• Four RF outputs, two auxiliary ports for power, and two fiber ports
• Two receivers forward path
• Two lasers for return path
• 4 RF output port, each with output level of 50 dBmV @ 870 MHz
• Level of RF port can be independently adjusted with attenuation pads
• Optical capabilities: 1310nm, 1550nm or CWDM in both forward & return
• Forward optical redundancy and return redundancy
• Redundant dual power supply standard

Feature Name	Description
Technical Specification
Forward Path - Receiver
Receiver Wavelength Range	1270 nm - 1620 nm
Input Optical Power Level	+3 dBm to -6 dBm
RF Output Power Level	50 dBmV typ. @ 2 dBm optical input
Carrier to Noise Ration (CNR)	52 dB typ. @ 3.0% OMI & 0dBm Input
Composite Second Order (CSO) Distortion	65 dBc typ.
Composite Triple Beat (CTB) Distortion	65 dBc max.
RF Frequency Range	54 MHz to 870 MHz
Return Path - Transmitter
Transmitter Wavelength	1310 nm ± 5 nm (standard) 1470 nm, 1490 nm, 1510 nm, 1530 nm, 1550 nm, 1570 nm, 1590 nm, 1610 nm (CWDM)
Output Optical Power Level	+2.5 dBm typ.
RF Input Power Level	20 dBmV typ.
Carrier to Noise Ration (CNR)	> 50 dB typ. @ 20 dBmV RF Input
RF Frequency Range	5 MHz to 42 MHz
General Specifications
Flatness in Frequency Range	±0.5 dB
Optical Return Loss	45 dB min.
RF Impedance	75 Ω
RF Return Loss	16 dB min.
Number of RF Port	4
Mechanical Specifications
Operating Temperature Range	0°C to +50°C
Storage Temperature Range	-40°C to +70° C
Power Supply	80 – 240 V, 43 – 63 Hz AC 40 - 58 VDC (Optional)
Power Consumption	60 W max.
Housing Dimensions	1RU: 19”(W) x 14”(D) x 1.75”(H)
Control / Monitoring	Pump Laser Temperature and Current
Display	Output Power Level, TEC Temperature
Alarm	Over Temperature , Over Current
Optical Connectors	SC/APC or Customer Specified