Term
|
Definition
Increase in amplitude.
Obtained by boosting power (amplifier); focusing the antennae.
Measured in decibels |
|
|
Term
|
Definition
Decrease in amplitude.
Experienced by reducing power (attenuator);
by introducing splitters, long cables, etc.
Measured in decibels. |
|
|
Term
|
Definition
| Radio signal that bounces off an object. |
|
|
Term
|
Definition
| Radio signal that passes thru an object, but exits at an angle. |
|
|
Term
|
Definition
| Radio signal passing around an object. |
|
|
Term
|
Definition
| Radio signal that is broken into multiple signals that go in new directions; somewhat out of phase to the original signal. |
|
|
Term
|
Definition
| Voltage Standing Wave Ratio |
|
|
Term
|
Definition
| Backpressure in the electrical circuit. |
|
|
Term
|
Definition
| Antennae, cables, connectors of different impedence. |
|
|
Term
|
Definition
The boosting of signal strength.
Actively by using a booster (amplifier);
Passively by using a high-gain antennae. |
|
|
Term
|
Definition
| Reducing of a signal. Actively by using a resistor (attenuator); Passively/unintentionally by using long cables or splitters. |
|
|
Term
|
Definition
| No objects from point A to point B blocking your view (walls, trees, mountains, etc). |
|
|
Term
|
Definition
| Nothing blocking the RF signal from point A to point B. |
|
|
Term
|
Definition
| Elliptical path of RF that must be reasonably free of obstructions for RF LOS to exist. |
|
|
Term
|
Definition
| All of the equipment up to the AP antennae (AP, connectors, cables); the first point where you measure output power to ensure FCC compliance. |
|
|
Term
|
Definition
| Radio signal power as it leaves the antennae (measured from the antennae OUT); the second point where you measure output power to ensure FCC compliance. |
|
|
Term
|
Definition
| Effective Isotropic Radiated Power |
|
|
Term
|
Definition
| Process of transmitting or conducting energy. |
|
|
Term
|
Definition
| Signal striking an object is 100% absorbed; does not pass thru or reflect off. |
|
|
Term
|
Definition
| Loss incurred by an RF signal due to signal dispersion. |
|
|
Term
|
Definition
| The natural broadening of the signal wave. |
|
|
Term
|
Definition
| Time between the arrival of the direct and reflected signals at the receiver. |
|
|
Term
| Referring to FHSS, what is the ranges of hop frequencies? |
|
Definition
| Each hopping set must contain at least 75 hopping frequencies, but no more than 79; GHz ranges between 2.402 to 2.480. |
|
|
Term
|
Definition
| The FHSS transmitter and receiver must be on the same carrier frequency at the same time for successful transmissions to occur. TRUE |
|
|
Term
| Synchronization Technology: |
|
Definition
| Hop sequence that is based upon 'synchronization' of AP's with each other that allows hopping to occur simultaneously; this ensures hopping sequences do not conflict with each other. |
|
|
Term
| Non-Synchronization Technology: |
|
Definition
| Maximum number of systems depends on the performance requirements and traffic loading of the system. |
|
|
Term
| DSSS is used in which 802.11x technology and what data rates are achieved? |
|
Definition
| Used most widely in 802.11b and achieves data rates of 1, 2,5.5, and 11 Mbps. |
|
|
Term
| 802.11b standard is sometimes called 'High-Rate DSSS' or __________: |
|
Definition
| 'HR-DSSS'; data rates of 5.5 and 11 Mbps are specified. |
|
|
Term
|
Definition
| 802.11b provides for backward compatibility. TRUE |
|
|
