A high-split could be used to enhance upstream capacity in today’s DOCSIS 3.1 networks as well as in future DOCSIS 4.0 networks. Rather than limiting upstream capacity to the spectrum range of 5MHz-42MHz, as it is in many North American DOCSIS networks today, a high-split would increase that range to 5MHz-204MHz.
Also What is mid split? Mid split: also known as extended sub-split, an HFC network requiring a. diplex filter in which the upstream is transported in spectrum below the. downstream, and where the cross-over between the upstream and downstream. occurs between 85 and 108 MHz.
Likewise What is upstream frequency range for a high-split architecture? The DOCSIS 3.0 specifications support an upper frequency edge for the upstream band of up to 85 MHz, also known as mid-split. While the newer DOCSIS 3.1 specification supports an upper frequency edge of up to 204 MHz, also known as high-split.
At what frequency does a return upstream amplifier operate? The contemporary high-split band plan uses 5 MHz to 204 MHz for upstream transmission, with the downstream starting at 258 MHz. See Figure 5.
What is Diplex filter?
The diplex filter, or diplexer, is a matched set of low-pass and high-pass filters, which separate signals by direction (possible due to their difference in frequency). … The upstream paths from all subscribers may be combined to send all upstream signals through the same path.
What is band split filter? This is a filter designed to split a band of frequencies into two sub-bands. It has 3 ports, a common port for the combined bands and separate port for each of the sub-bands. It is primarily intended to allow two radio transceivers operating on different bands to share the same antenna.
What is upstream and downstream network? The upstream is from the customer to the provider (requesting a Web page, sending email, etc.). In cable TV, downstream signals are the network, movie and sports channels transmitted to the customer. However, if the cable provider offers video-on-demand or Internet access, the cable also has an upstream.
When was Docsis 3.1 released? Officially released by CableLabs in 2013, the DOCSIS 3.1 specifications are the current industry standard for providing high-quality internet access over hybrid fiber coax (HFC) networks.
What frequency does Docsis 3.0 use?
DOCSIS 3.0 used frequency band 5 MHz to 65 MHz for upstream and 85 MHz to 1002MHz for downstream, whereas DOCSIS 3.1 allocates 5 MHz to 204 MHz for upstream and 252 MHz to 1788MHz for downstream traffic.
What does a Diplex filter do? The diplex filter, or diplexer, is a matched set of low-pass and high-pass filters, which separate signals by direction (possible due to their difference in frequency).
What does a diplexer do?
A diplexer is a passive (RF) filter component with three ports, which enables the sharing of a common antenna between two distinct frequency bands. This technology allows transmitters operating on different frequencies to use the same antenna and each band may both transmit and/or receive.
What range of frequencies serve as the upstream data band? Upstream signals from users occupy the 5 to 42 MHz spectrum. This spectrum is usually divided into 2-MHz channels.
What is the difference between diplexer and combiner?
The diplexer is a different device than a passive combiner or splitter. The ports of a diplexer are frequency selective; the ports of a combiner are not. There is also a power “loss” difference – a combiner takes all the power delivered to the S port and equally divides it between the A and B ports.
What is a Quadruplexer?
A quadplexer is a 5-port filtering device that splits one input in to four different outputs, each with a different frequency. It can also be used the other way round and where it routes signals at four different frequencies to a single port.
What is double Plexer? A doubleplexer is a device taking a single input signal and selecting one of many data-output-lines, which is connected to the single input. A duplexer is a device that allows use of the single antenna by both transmitter and receiver.
What is Q in bandpass filter? Q factor. A band-pass filter can be characterized by its Q factor. The Q-factor is the reciprocal of the fractional bandwidth. A high-Q filter will have a narrow passband and a low-Q filter will have a wide passband. These are respectively referred to as narrow-band and wide-band filters.
What is pass band and Stopband?
A: Passband is the band of frequencies of the input signal that passes through the filter with an attenuation of less than 3 dB attenuation, while stopband is a band of frequencies of the input signal that are blocked or more highly attenuated by the filter.
What is Q filter? The “Q” of a band pass filter is the ratio of the Resonant Frequency, ( ƒr ) to the Bandwidth, ( BW ) between the upper and lower -3dB frequencies and is given as: So for our simple example above, if the bandwidth (BW) is 400Hz, that is ƒH – ƒL, and the center resonant frequency, ƒr is 346Hz.
What does Mbps mean?
Broadband speeds are measured in ‘megabits per second‘, often shortened to Mb Mbits p/s or Mbps. Bits are tiny units of data, with a megabit representing a million of them. The higher the number of Mbps (megabits per second) you have, the speedier your online activity should be.
What is a docsis channel? Data over cable service interface specification (DOCSIS) is a standard for broadband cable transmission of IP data services. It defines an upstream and downstream channel to enable bidirectional communications between a cable modem termination system (CMTS) in the cable headend and a subscriber’s cable modem (CM).
What is oil and gas upstream?
Upstream refers to points in production that originate early on in the processes. Also called exploration and production (E&P), upstream is farthest from the end-user consumer in the oil & gas supply chain. Upstream activities include exploration, drilling, and extraction.
Is DOCSIS 3.0 outdated? Long-term use: DOCSIS 3.0 modems aren’t exactly outdated yet, but it’s safe to say 3.1 modems are the best option for long-term use.
Does DOCSIS 3.1 increase speed?
DOCSIS 3.1 provides faster Internet speeds using advanced signal processing techniques that increase the available spectrum for transferring downstream and upstream data. This process transmits more data traffic, faster and more efficiently.
Will DOCSIS 3.1 increase upload speed? And that’s where DOCSIS 3.1 comes in. DOCSIS 3.1 standard supports up to 10 Gbps download and 1 Gbps upload speeds which is up to 10x faster than DOCSIS 3.0. Currently cable ISPs are offering Gigabit Internet service using DOCSIS 3.1 technology.
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