Testing a WiFi Amplifier - The Dos and Don’ts

A question that comes up from time to time is how to properly test our WiFi amplifiers to ensure signal compatibility and gain characteristics in a particular application.

Proper testing is quite important because improper testing can permanently damage the amplifier.

A common mistake is connecting a signal generator or network analyzer to the amplifier so that the power output can be easily measured. These types of devices generally put out a CW signal, which in a short period of time can damage the amplifier due to over-stressing some of the internal components. Even if the amplifier is not damaged to the point of total system failure during testing, the life span of the device could be shortened due to damaged components.

Here are some guidelines for amplifier testing:

1. Only use with 802.11x devices. Do not test with a continuous wave (CW) signal or Network Analyzer.

2. Insure that the output of the amplifier (antenna port) is connected to an antenna with a low VSWR. This will prevent power from being reflected back to the output stage of the amplifier and possibly damaging the amplifier.

3. Only use the power supply that comes with the amplifier.

4. Make sure the amplifier is used in a well ventilated area.

L-com’s HyperLink amplifiers go through an extensive testing process by our lab technicians to ensure that they meet our high level of quality standards and reliability.

Here are some helpful definitions of amplifier terms:

CW (Continuous Wave) = an analog signal which is always “on” (100% duty cycle)

VSWR (Voltage Standing Wave Ratio) = is a measure of how efficiently radio-frequency power is transmitted from a power source, through a transmission line,
into a load. Perfect = 1.0:1, Good < 2.0 :1

Check out our Common Wireless Terms glossary on our website!

Here are some high-quality amplifier items and accessories:

Certified Amplifier Kits	PoE Amplifiers	Replacement DC Injectors	Weatherproof Enclosures