€h 18 - Wireless Flashcards

1
Q

18–2 services and applications

Technological considerations of wireless =

A

Scalability

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2
Q

18–2 services and applications

Reliability of wireless =

A

Consistency of service

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3
Q

18–3 services and applications

Environmental considerations =

A

Materials, objects, local geography, atmosphere

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4
Q

18–4 wireless standards and technologies

PAN =

LAN =

MAN =

GAN =

A

* 33 ft

* small geographic area, within an office building

* 50mi

* satellite

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5
Q

18–5 wireless standards and technologies

802.15.4 =

A

ZigBee’s

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6
Q

18–6 wireless standard technologies

WiMax

A

30 miles per hour

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7
Q

18–7 emerging wireless technologies and related standards

MBWA=

(2)

A

* Mobile broadband wireless access

* IEEE 802.20*100mi

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8
Q

18–12 electromagnetic spectrum

Spectrum groups =

(2)

A

*Ultra high frequency (UHF)

*300 MHz to 3000 MHz

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9
Q

18–13 spectrum groups

Band 6 =

Band 8 =

Band 9 =

A

*Medium

*very high

*ultrahigh

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10
Q

18–17 modulation demodulation techniques used in wireless systems

Modulation technique =

A

Except, CDMA does not belong

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11
Q

18–20 pre-design and survey analysis

Heavy moisture =

A

Causes disruptions in RF

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12
Q

18–21 licensed wireless networks

6 GHz and 11 GHz =

A

Public Safety applications (share office, law office)

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13
Q

18–23 design considerations

Radomes =

A

Covers antennas

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14
Q

18–26

Antenna types =

A

Except, trapezoidal, does not belong

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15
Q

18–28 waveguide feeders

High-frequency coaxial =

A

Very highly losses

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16
Q

18–28 waveguide feeders

Waveguide joined =

A

Airtight flange fittings

17
Q

18–28 waveguide feeders

Elliptical waveguide =

18
Q

18–29 pressurization equipment

Towers (wireless) =

A

5mi airport Antenna supporting structure > 200ft high

19
Q

18–30 pigtails and jumpers

Antenna =

(2)

A

* 7/8 type N connector

* Connector weakest point

20
Q

18–30 power supplies and voltage objectives

Two major types voltage injectors =

A

Coaxial & unused pair

21
Q

18–31 cable management

Feed line support =

A

1-1/2 inch above the roof

22
Q

18–33 DAS

DAS transmits =

A

Within buildings

23
Q

18–33 DAS

DAS root =

A

Radio transceiver

24
Q

18–34 DAS

DAS size =

A

Single antenna or multi-antenna

25
18–35 cable plant Five types of DAS cable =
Except wireless or password hybrid
26
18–35 cable plant Shielded twisted pairs =
Carries power for the units
27
18–36 components Antenna =
Must be tuned to the same frequency band
28
18–36 components Radiating cable technology allows =
Coaxial cable
29
18–40 components Retransmitted DAS services =
Except, family radio service (FRS) does not belong
30
18–43 components Passive =
Does not require external power input
31
18–43 topologies Cabling topologies DAS within = (2)
\* Star \* Tapped-trunk
32
18–44 star topology Start topology cabling for DAS = (3)
\* Balanced twisted-pair \* coaxial \* optical fiber cables
33
18–46 DAS First-generation (1G) =
Analog cellular
34
18–47 multiplexing technique Forms of multiplexing =
Except GDMA does not belong "grandma"
35
18–59 basic service set (BS) AP =
"Stand alone" or cable
36
18–67 routers =
Home-office