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| | | | FAQ Revisions | Editors: Raydr  , Axilla
Last modified on 2007-09-20 18:13:49
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4.4 Amplifiers·What is an amplifier?
·How can I tell if an amplifier will work with my cable modem?
·Amplifier / Cable Modem Compatibility List
·Will an amplifier make my connection faster?
·Can I use a satellite amplifier for my cable modem?
·What to look for in a cable amplifier.
| | | A CATV amplifier is used to boost an existing GOOD signal so that it can travel further.
You can find these at Radio Shack (get a good quality one), and Circuit City has begun selling them too (at a high price).
The best place to put these is at the junction, BEFORE the first splitter. Putting an amplifier behind your TV or before your cable modem will NOT help at all, because at that point the signal is already bad and weak. You will just end up amplifying a BAD SIGNAL.
There are several varieties of Amps, but you'll probably be okay with a one port. These usually have a gain of 12 to 15db. Make sure you get a 900MHz (or better) amp. These will run you from $30 to $120.
Two port amps usually have a gain of 9 to 13 db.
Four port amps usually have a gain of 6 to 10 db.
NOTE: Amplifiers are to boost EXISTING GOOD SIGNAL in order to increase the distance that it will travel. Do NOT use an Amp to fix a noisy or bad signal; You'll just end up amplifying a bad signal.
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by Raydr
last modified: 2002-03-01 08:42:19 | | | IMPORTANT: There are a lot of amplifiers that will block your cable modem from talking back to your provider! This obviously defeats the purpose of having one.
Look for this when buying an amplifier:
"Cable modem compatible"
or
"5-42MHz passive return"
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by Raydr | | | The following Amps are KNOWN to work with cable modems:
Electroline EDA2100 (Thanks, bouchecl )
Electroline EDA2400 (Thanks, bmusgrove )
(I'm assuming that the above are 1 and 4 port models, respectively)
Motorola Signal Booster Drop Amp - Model 484095-001-00 (Thanks, Cory Cooper )
Scientific Atlanta Surge-Gap(r) Drop (Thanks, Me)
Pico Macom CDA-1A (Thanks, Charter tipster. currently $40 shipped).
The following Amps DO NOT work with cable modems:
The inline amplifier sold at Radio Shack prevents 2-way communication. (Thanks, Chakthi )
I do not have access to many amps. If you have an amp installed in your home, please provide me with the information for it and whether it works or not!
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by Raydr
last modified: 2007-01-02 15:11:53 | | | No.
Simple analogy: Adding more gas to your car does not make it run faster.
Adding a better QUALITY gas to your car may make it run more efficiently. Same with amplifiers.
Thanks for Mike for the question.
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by Raydr
last modified: 2002-03-01 10:26:18 | | | All that matters is that the amplifier boost from 54MHz to 1GHz up, with a passive return in the 2 to 54MHz range.
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by ithxp edited by Raydr
last modified: 2002-11-28 18:34:29 | | | When you determine that you need to apply a cable TV amplifier within your CPE (Customer Premise Equipment) cable structure for increasing your signal level to travel an extended amount, it is very important to install the correct style of amplifier. With many different manufacturers offering a variety of amplification products, it is often difficult for the end user to know what is right for them. The first step in determining the amplifier type that you are going to use is to look at what broadband services (such as video, data, and telephone) you will be using, or will be using now or in the future. There are four basic house amplifiers, Forward Gain, Return Gain, 2-Way Active, and Bypass.
Forward gain cable amplifiers can by used in a variety of different situations, from compensating for lower signal strength from your cable provider, raising the strength of the signal from your cable provider, or increasing the signal before multiple line are connected. The forward gain amplifier works in providing an increased signal level into your home on the upstream band of 54-1000 MHz, and still allowing the 5-42MHz return band to be passed on back to the cable provider with little or no loss in signal level. Things to look for when purchasing a forward gain amplifier are, Low noise of 3 dB or lower, low distortion and excellent return loss which should be about 20 dB.
Return gain cable amplifiers are used to correct for weak signal strength on the return path with in the 5-42 MHz band being sent back to the service provider from your home for your high speed internet, interactive television, and telephony services. Some cases that would require a return gain amplifier are attenuation caused from passives install in the home and long cable runs from the service providers tap to your home. Things to look for when purchasing a return gain amplifier are a noise figure level of 5.5, SCTE compliant water sealed connectors, RFI Shielding of 100 or greater, and the housing material.
2-Way Active cable amplifiers are used to compensate for weak signal strength in where both the forward path of 54-1000 MHz and the return path of 5-42 MHz would need to be increased for your high speed internet, Interactive television, and telephony services.
Bypass cable amplifiers work in the same way as forward gain amplifiers to increase the signal level on the 54-1000 MHz band for high speed internet, interactive television and telephony services, and still allowing the 5-42MHz return band to be passed on back to the cable provider with little or no loss in signal level. The difference from the forward gain amplifier is that the bypass amplifier has a built in relay switch designed to bypass the amplification circuitry to bypass mode and provide constant uninterrupted telephony service in the event of a power outage.
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by urbroadband edited by Axilla
last modified: 2007-09-20 18:10:07 |
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