WOMBAT-Empfang » An 802.11 WLAN transmitter t

Question: 1

What word describes the bending of an RF signal as it passes through a medium of a varying density from that of free space?

A. Diffraction
B. Reflection
C. Refraction
D. Diffusion
E. Scattering


An
Answer: B


Question: 5

Return Loss is the decrease of forward energy in a system when some of the power is being reflected back toward the transmitter.
What will cause high return loss in an RF transmission system Paul Stastny Jersey , including the radio, cables, connectors and antenna?


A. A Voltage Standing Wave Ratio (VSWR) of 1:1
B. An impedance mismatch between components in the RF system
C. The use of cables longer than onemeter in the RF system
D. High output power at the transmitter and use of a low-gain antenna


Answer: B


Question: 6

What factors are taken into account when calculating the Link Budget of a point-to-point outdoor WLAN bridge link?


A. Operating frequency
B. Transmit antenna gain
C. Transmit power
D. Antenna height


Answer: A Dmitrij Jaskin Jersey , B, C


Question: 7

A WLAN transmitter that emits a 200 mW signal is connected to a cable with 3 dB loss.
If the cable is connected to an antenna with 10 dBi gain, what is the EIRP at the antenna element?


A. 10 dBm
B. 13 dBm
C. 20 dBm
D. 26 dBm
E. 30 dBm


Answer: E


Question: 8

In a long-distance RF link Alexander Steen Jersey , what statement about Fade Margin is true?


A. Fade Margin is an additional pad of signal strength designed into theRF system to compensate for unpredictable signal fading.
B. The Fade Margin of a long-distance radio link should be equivalent to the receiver鈥檚 antenna gain.
C. A Fade Margin is unnecessary on a long-distance RF link if more than 80% of the first Fresnelzone is clear of obstructions.
D. The Fade Margin is a measurement of signal loss through free space, and is a function of frequency and distance.


Answer: A


Question: 9

Which unit of measurement is an absolute unit that is used to quantify power levels on a linear scale?


A. dBm
B. SNR
C. RSSI
D. VSWR


Answer: A


Question: 10

An 802.11 WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB of loss. The cable is connected to an antenna with 16 dBi of gain.
What is the EIRP power output?


A. 2 mW
B. 500 mW