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Essential key element of CMTS-CABLE Modem Synchronization .
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Fully compliant with all Cable Modems & Set top box communication.
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"Clean up" the upstream band to enlarge the spectrum for ultra high speed internet.
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Protect IP data against upstream RF noise impairments.
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Docsis 3.0 + , Docsis 2.0 , docsis 1.0 approved.
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Save the need for network upgarde.
Safecom's UPSTREAM NOISE BLOCKER is a revolutionary cost-effective RF noise suppression technology 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 IngressGate™ technology eliminates 70-90% of the 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 Upstream noise blocker (US patent 8850505) technology is based on the burst nature of the return path and the random presence of ingress or RF noise. The technology functions as an 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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RF & ingress Noise reduction by > 28dB.
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Without RF swicth 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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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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Life time operation.
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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 & RF noise 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
noise from customer premises to the network by 28dB.
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Cannot solve
ingress problems from customer premises.
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Solution
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UPSTREAM NOISE BLOCKER ordering info.
§
MODEL IGDA0000TA
5-42MHZ /
55-1000MHZ
§
MODEL IGDA0000TE
5-55MHZ /
70-1000MHZ
§
MODEL IGDA0000MA
5-65MHZ /
80-1000MHZ
For improving system implementation and reducing cost integrated ingress protection drop amplifier enables the simplest way to resolve the ingress 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.
Upstream Ingress Protection with RF Active forward/return gain
Electric Performance- DOCSIS 3 Approved
UPSTRAMNOISE BLOCKER Model IGDA0000TA,TE,MA Specifications |
Parameter | Unit | Min value | Typical value | Max value |
Forward (Downstream) path |
Frequency range | MHz | 55,65,85 | | 1000 |
Gain | dB | 0 | 0 | |
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 | | 42,55,65 |
Upstream Noise Blocker Isolation Modem / set top box passive upstream | | | >28 | |
Gain | dB | | 0 | |
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” | dB | | >8 Upstream Blocked | |
Noise figure- Upstream pass | 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. | | | |
