Essential key element of CMTS-CABLE Modem Synchronization
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Solving the “Funneling Effect” at HFC & RFoG networks.
Innovative Home amplifier with upstream 28dB RF Noise Blocker (US PATENT ), that allows carrier signals from customer premises into the network only when the home devices are actively transmitting.
DOCSIS 3 Approved
Safecom's new IGDA is a revolutionary cost-effective next generation CATV home Amplifier with 28dB Upstream Noise Blocker based on the patented IngressGate™ technology that enables CATV operators to optimize the upstream bandwidth and add advanced services with no interference by eliminate the RF and ingress noises reside in the upstream path. Unlike standard solutions for ingress detection and monitoring, Safecom's Patented technology eliminates 90-99.9% of the upstream ingress noise by addressing the source of the problem where most ingress noise is created while providing the amplified signal - at the customer premises.
How does it work?
Safecom's IngressGate™ technology is based on the burst nature of the return path and the random presence of ingress noise. The technology functions as a upstream gateway that allows carrier signals from customer premises into the network only when the home devices are actively transmitting. This mode of operation eliminates most of the ingress noise without any adverse effect on the upstream and downstream signals. Safecom's IngressGate™ technology supports DOCSIS 3.0 + that requires switching speed faster than 1.6 μS and ensures the most reliable and cost effecting solution for upstream ingress noise.
Conclusion:
Blocking upstream noise on the RFoG & HFC network using Safecom's noise blocker will allow designers to reach highest performances before expensive upgrading and installing special fiber optics components.
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Upstream RF & ingress Noise reduction by > 28dB.
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Without RF switch or relay.
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Response time < 1 m sec. (Docsis 3 & Docsis 2)
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No impact of an active return transmission.
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Life time operation.
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Eliminates the use of filters or other expensive ingress protection components.
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Lowering the noise floor.
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Plug and play device.
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No need for expensive monitoring or useless detection.
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Simple integration outdoor or indoor.
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Without any RF or Mechanical switch.
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Best performance in the market.
INGRESS GATE Technology :
Open upstream only when Modem transmitting
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Home Ingress detection and 6dB attenuation
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Frequency Division
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Upstream path to ON, OFF, or
6 dB attenuation
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Technology
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Very Low
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Med
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High
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Med
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Cost
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No
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Yes
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Yes
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Yes
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Needs ingress detection system
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Home (by customer or technician )
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Home pass/ Network
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Network
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Network
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Installation
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No RF disconnections during installation.
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Disconnect RF signal to large area during installation.
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Disconnect RF signal to large area during installation.
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Disconnect RF signal to large area during installation.
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Broadcast continues during installation.
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IngressGate™ Solution
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Opposite Phase concept.
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Operates as upstream gate that opens only when the modem transmits.
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Opposite phase merging.
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Technology
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Full
28 dB ingress isolation.
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Partial
0- 6 dB only ingress reduction.
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Effectiveness
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INGRESS GATE -CABLE Modem Synchronization
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Assumes ingress noises are at the same phase or from the same source.
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Operating
principle.
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Solves and blocks all upstream RF noise from customer premises by 28dB.
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Cannot solve
ingress problems from customer premises.
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Solution
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Electric Performance- DOCSIS 3 Approved
IGDA 1510 / TA,TE,MA 1-output Drop Amplifier & upstream noise blocker (All in One) |
Parameter | Unit | Min value | Typical value | Max value |
Forward (Downstream) path |
Frequency range | MHz | 70 | | 1000 |
Gain | dB | | 14 | |
Flatness | dB | | ±0.75 | ±1.0 |
Return loss | dB | 16 | 18 | |
Output level 1 | dBmV | 25 | | |
Noise figure | dB | | 3.5 | 4 |
Group delay | Channel 2 | ns | | | 25 |
Channel 3 | ns | | | 10 |
After CH5 | ns | | | 5 |
CTB 1 | dBc | | | -73 |
CSO 1 | dBc | | | -62 |
Xmod1 | dBc | | | -70 |
HUM | dBc | | | -70 |
Reverse (Upstream) path |
Frequency range | MHz | 5 | | 55 |
UpstreamNoise Isolation | | | >28 | |
Gain | dB | | 10 | |
Flatness | dB | | ±0.5 | ±0.75 |
R/L RF OUT | Upstream“ON” | dB | 16 | >18 | |
R/L RF IN | Upstream “ON” | | | >18 | |
R/L RF OUT | Upstream “OFF” Modem not Active | dB | | >8 Upstream Blocked | |
Noise figure MODEMActive | dB | | 6.5 | 7 |
Group delay | 5-42MHz | ns | | | 20 |
10-36MHz | ns | | | 5 |
2nd Inter modulation 2 | dBc | | | >60 |
3rdInter modulation 2 | dBc | | | >57 |
Thresholdlevel 3 | dBuV | | 75±1 | |
Operating time | ns | | 1000 | |
INGRESS GATE Display | | LED ON when upstream ON |
1.Input flat 10dBmV,77 chennels/6MHz |
2.Input 2 un modulated series carriers @ 27, 33MHz, out level 58dBmV. |
3.One un-modulation carrier wave. | | | |
Ingress Gate Drop Amplifier ordering info.
For improving system implementation and reducing cost integrated ingress protection drop amplifier enables the simplest way to resolve the upstrream RF & ingress noise problems while at the same time saving the need for additional common drop amplifiers. Safecom offer range of Ingress gate solutions with or /without RF gain at the upstream /downstream.