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RF Technologies
Antennae Accessories
25
Other
Professional
01/19/2007

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Cards

Term
RF Attenuator
Definition
Device that causes precise measured loss (in -dB) in an RF signal.
Term
RF Attenuator: Variable Loss
Definition
Allow the administrators to configure the amount of loss that is caused with precision; used in Site Surveys to determine antennae gain, cable length, necessity for amplifiers, etc.
Term
True/False: It doesn't matter where you place an attenuator.
Definition
True
Term
Grounding system: First Purpose
Definition
To provide a safe path for lightning's current to travel to ground.
Term
Grounding system: Second Purpose
Definition
To ensure that all connected electrical systems have a common ground.
Term
Ohmic Heating
Definition
When electricity travels through an object with high impedance (such as RF equipment) generates enough heat to start a fire to buildings and burn through steel.
Term
Grounding for electrical installations requires how many feet?
Definition
Minimum of 8 feet.
Term
What is a 'lightning arrestor' used for?
Definition
Used to shunt into the ground transient current that is a caused by a nearby lightning strike; used to protect WLAN that are attached to 'coax'.
Used for 'OUTDOOR' antenna's.
Term
Timeframe in which lightning 'arrestor' must trigger a short to earth ground:
Definition
Most happen in 2 microseconds.
MUST meet IEEE standards.
Term
If you completely lose signal in a system that contains a 'lightning arrestor', what is the first thing you should check?
Definition
The lightning arrestor.
Term
What side of the components are protected by the lightning arrestor?
Definition
The Network side.
Term
True/False: The higher the VSWR ratio of the device, the better.
Definition
False. Lower is better.
Term
RF Splitter
Definition
Device that has a single input connector and multiple output connectors.
Used to 'split' single signals into multiple signals.
Term
True/False: When installing a splitter, the input connector should always face the source of the RF signal.
Definition
True.
Term
Insertion Loss
Definition
Loss of RF signal amplitude when introducing a splitter into the circuit
Term
High Isolation Impedance
Definition
Impedance between the output ports of the splitter.
Term
True/False:
Definition
Splitters are rated for power input maximums. True
Term
What are the two types of connectors generally associated with splitters?
Definition
N-type and SMA connectors.
Term
True/False:
Definition
It is NOT important to purchase a splitter with the same connector types as the cable being used. False
Term
True/False:
Definition
All splitters should come with a 'calibration' report. True
Term
RF Connectors are:
Definition
Specific types of coupling devices used to connect cables to devices, or devices to devices.
Term
Common connector types are:
Definition
N, F, SMA, BNC, TNC.
Term
Pigtail Adapter Cable:
Definition
Connects industry-standard cable connectors with 'non-standard' connectors.
Term
True/False:
Definition
Pigtails or antenna's used with a wireless LAN falling under FCC rules MUST be part of a certified system and documented as such by the FCC. True
Term
Frequency Converters:
Definition
Used to convert one frequency range to another for the purpose of 'decongesting' a frequency band.
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