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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.

Feedback received on this FAQ entry:
  • Antronix FRA8-400 works well with RR cable/modem.

    2010-01-24 10:55:26



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by urbroadband See Profile edited by Axilla See Profile
last modified: 2007-09-20 18:10:07