EEST 111

Some equalizers allow you to sweep frequency bands. This means you

Move equalization into higher or lower frequencies

RFI and EMI problems are often dealt with by

Isolation

The directionality of a microphone determines its sensitivity to sounds coming from different

Angles

A type of filter that passes all frequencies except those in a limited range is

Band rejection filter

... is a term used in antenna specifications to describe the width of an antenna ' s main lobe at the points where the voltage is .707 times the maximum voltage

Beam width

In HDMI, horizontal and vertical sync are included in the

Blue channel

What properties of a video signal do hue and saturation describe?

Color and amount of gray

When an array of speakers lacks a uniform response it results in

Comb filtering

Clipping means the transient highs of a waveform are cut off, creating

Deviation

In order to operate, a condenser microphone requires

Electrical current

A microphone converts sound to

Electrical energy

Inputs to an audio system are first converted to

Electrical signals

The preferred connector for connecting satellite video to the set-top box is

F- type compression

Computer displays experience a noticeable flashing of the picture called

Flicker

Loudspeakers intended for suspension are said to be designed for

Flying

A bandpass filter attenuates

Frequencies on either side of a designated band

The ratio between the power of an input signal and the output signal is known as

Gain

A 1,000,000,000 Hz signal can also be expressed as

Gigahertz (1GHz)

The type of cable that carries both video and audio is

HDMI

Transformers with multiple sets of leads for connecting speakers at different wattages are known as

Line matching transformers

What compression method is used for the compression of DTV

MPEG

In what type of circuit are the source and the load impedances equal

Matched

The item labeled as 9 in the figure above is a

Modulator

The loudness of sound is stated in terms of

Sound pressure level

The instrument used to measure frequency response relative to a room is a

Spectrum analyzer

Video signals carry 3 types of information :brightness, color, and

Synchronization

The power supply that provides the for a CATV distribution system line amplifier is

The power supply distribution

The load impedance of a bridged circuit is how many times that of the source?

10

Which of the following coaxial cables has the least attenuation per 100' regardless of frequency

0.5 or1/2 inch cable

The primary frequencies produced by the human voice are in the range of

100 to 400 Hz

The frequency range of the down link signals transmitted by a DBS satellite is

12.2 to 12.7GHz

Speaker systems for speech reinforcement are optimized in the range of

200 to 8000 Hz

In the figure above, the tap value for the last tap needed to deliver a minimum of 6dBmv to a subscriber is

20dB

In the figure above, the tap value for the third tap needed to deliver a minimum of 6dBmv to a subscriber is

22dB

The peak program meter (PPM) typically has a total meter range of

24 to 26 dB

A speaker with built-in amplifier is used in a

24V paging system

The signal level for channel 2 at the input to the last tap in the figure above is

29.5dB

For how long does a VU meter sample incoming sound to produce an average volume level for a signal

300 milliseconds

The signal level for channel 2 at the input to the second tap in the figure above is

35.5dB

Which component shown in the figure above function to electronically amplify and improve the signal - to- noise ratio of a received VHF or UHF signal

5 (amplifier )

TV channels formatted in the HDTV format have

6MHz bandwidth

The nominal insertion loss of a four-way splitter that is being used as a combiner is

7 dB

Which component shown in the figure above produces audio and video baseband outputs?

8 (satellite receivers )

The frequency range of the signals applied to the input of a satellite receiver typically is

900 to 1450 MHz

In sound system, feedback is a

Acoustical problem

The RGB colors in the RGB color space are considered

Additive colors

The type of head end processor that provides the most flexibility for channel output is a

Agile heterodyne processor

A test instruments used to determine insertion loss and cable loss at a preset frequency is called

An impedance bridge

Of the following, which type requires 3 cables to carry the video signal

Component

The DVI standard applies to HDTV and

Computer displays

A balancing amplifier is used to

Connect an unbalanced line to a balanced connection

The type of distortion generated in a distribution amplifier that can cause a buzzing in the TV sound and sound lines in the picture is

Cross modulation

The most common form of distortion from an amplifier is

Harmonic distortion

A microphone cable should

Have a high strand count

The vertical sync signal is based on the width of the

Horizontal sync

Each line of a video field contains a

Horizontal sync signal

When noise levels are extremely high, paging system use

Horns

In an audio system, the term constant - voltage describes the distribution of

Power

For audio applications, an amplifier increases the

Power of the signal

A plasma video panel is considered a

Presentation device

The item labeled as 3 in the figure above is a

Processor

Response time for an LCD relates to what rate of an LCD display ?

Refreshing

National networks and movie channels such as CNN and HBO are received by a CATV head end via

Satellite antenna

3 characteristics that determine the resolution of a display device are

Scan lines, number of pixels, and bits per color

The topology of a distribution system used by a regional cable company to distribute CATV signal to its subscribers is called

Trunk branch system

In the frequency spectrum allocated for broadcast TV, the sequence of the frequency bands moving from the higher frequencies to lower frequencies is

UHF, High VHF, band pass

Cables with a single conductor and shield are

Unbalanced line

In an HDMI connector, pins 1-9 carry

Video and audio

Viewing angle refers to what properties of a displayed image based on viewer position relative to the display?

Visibility and clarity

If a length of coaxial cable has an input signal of 400 microV and an output signal level of 100 microV, what is the attenuation loss of the cable?

dB lost= 12dB

If an amplifier has an input signal level of 200mW and an output signal level of 1000mW, what is the gain of the amplifier?

dB= 10×log p1/p2= 7dB