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Optical Node GWS862H4J(F)-G
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| Brief Introduction
GWSL862H4J-G is an ideal solution for medium and large scale HFC networks.
The most noticeable feature is modularization design: forward path optical receiver, return path optical transmitter, and SNMP responder are made as independent modules, which makes replacement simple and easy.
This node provides good redundancy. One GWSL862H4J-G could be load 2pcs forward-path optical receiver modules, 2pcs return-path optical transmitter modules. The “A/B Switch”, embedded on this node, senses optical power and switches to Backup module automatically when Main module fails.
A uniquely designed AGC/MGC unit is built inside. The node can be configured to work under AGC mode or MGC node. Under AGC mode, the AGC circuit senses optical power and keeps RF output level constant. Under MGC mode, RF level could be tuned by the Attenuation Control Board which offers 0~15.5dB, 0.5dB/step attenuation.
Total 4 RF outputs are provided. Amplification is carried out by GaAs power doubler amplifier module. Each output’s slope and level could be regulated independently.
Product Features
- Modularization design and good redundancy.
- 1290~1580nm optical wavelength, -5~+2dBm allowable optical input power.
- RF working frequency up to 862MHz.
- GaAs power doubler amplifier module enlarges RF level.
- 4 RF outputs, level ≥108dBμV when optical input at -1dBm.
- RF slope regulated by plug-in fixed equalizer.
- AGC/MGC unit allows the node to working under AGC mode or MGC mode.
- AGC circuit senses optical input power and keeps RF output level constant.
- MGC circuit embedded with Attenuation Control Board to tune RF level.
- Built with Tri-State-Switch on return-path to suppress noises, ensuring return-path signal quality.
- Embedded with unique “A/B Switch” to sense optical power and switch between Main & Backup module.
- SNMP Net-Management for option.
- Adopts plug-in fixed value equalizer to regulate slope and plug-in fixed value attenuator to control RF level.
- Power Pass functioned: 4 RF out ports are capable of feeding power into coaxial cables.
- Metal die-casting waterproof housing, suitable for outdoor installation.
Technical Specifications
Forward path |
Unit |
Specifications |
Optical |
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|
Wavelength |
nm |
1290 ~ 1580 |
Allowable Input Power |
dBm |
-5 ~ +2 |
Return Loss |
dB |
≥45 |
Optical AGC Range |
dBm |
-5 ~ +2
(Keeps RF output level constant when -5~+2dBm input) |
Connector |
- |
SC/APC or FC/APC |
RF |
|
|
Frequency |
MHz |
47/54/87~862, specify when order. |
Number of Outputs |
- |
4, female F connector. |
Output Level |
dBμV |
≥108dBμV, tested with -1dBm input power. |
In-Band Flatness |
dB |
±0.75 |
Return Loss |
dB |
≥16dB (47゛550MHz)
≥14dB (550゛1000MHz) |
Test Point |
dB |
-20 ±2 |
Optical Link Performance |
|
|
C/N |
dB |
≥51 |
C/CSO |
dB |
≥63 |
C/CTB |
dB |
≥65 |
Test Conditions: 59-CH PAL-D mixed with 200MHz wide QAM digital signal, 10km optical fiber, -1dBm optical receiving power, 10dB slope. |
Return Path |
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|
Optical |
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Wavelength |
nm |
1310±20 |
Laser Type |
- |
FP Laser |
Transmitting Power |
mW |
1~2 |
NPR Dynamic Range
(NPR≥30dB) |
dB |
≥15 |
RF |
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|
Frequency |
MHz |
5~30/42/65 |
Input Level |
dBμV |
75±5 |
Return Loss |
dB |
≥16 |
Power Supply |
|
|
Power Supply |
V |
AC 60V |
Power Pass Current |
A |
10 |
Environmental |
|
|
Working Temperature |
°C |
-25 ~ +55 |
Storage Temperature |
°C |
-40 ~ +80 |
Relative Humidity |
- |
≤85% |
Mechanical |
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|
Dimensions |
mm |
430(L)×250(W)×190(H) |
Weight |
Kg |
10 |
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