Datasheet > VT4T5UF2021

VT4T5UF2021

更新时间： 2024-11-02 12:47:23

品牌	Logo	应用领域
夏普 - SHARP		/
页数	文件大小	规格书
8页	107K
描述
Combination Tuner/Demodulator/Modulator

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中文翻译

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VT4T5UF2021 数据手册

VT4T5UF2021

Combination Tuner/Demodulator/Modulator

RF Data Sheet

FEATURES

• Receiving Standard: USA

• Receiving Channels:

– VHF Section

– Low Band – Air: 2 to 6 CATV: (A-8) A-5 to B

– High Band – Air: 7 to 13 CATV: C to W + 11

– UHF Section

– Air: 14 to 69

– CATV: W + 12 to W + 84

• Sending Channels:

– USA Channel 3 and 4

– CH 3: OPEN

– CH 4: GND

• Receiving and Sending System: USA Standard

M-System (NTSC)

• Channel Selection System: PLL Tuning

COMB4-1

• Detection System: Dummy Synchronization Detec-

tion System, Intercarrier Sound Receiving System

• Nominal Input Impedance:

– RF: 75 Ω, Unbalanced

FUNCTIONAL DESCRIPTION

The VT4T5UF2021 is a combination tuner, demodu-

lator and modulator in one package. This unit is compat-

ible with North American NTSC television broadcast

signals. An internal Phase-Locked Loop circuit per-

forms all of the required tuning functions. Digital control

information is provided to the unit on I2C serial data

bus. The tuner and demodulator blocks are internally

connected, providing an IF sample point for test pur-

poses. The modulator has separate video and audio

inputs and control connections. This single package

configuration is useful when there is no need to manip-

ulate the AGC or IF signals prior to demodulation, and

provides for a simplified system design. The RF con-

nectors are mounted on the end of the housing so that-

the smallest possible area is used on the rear panel of

the end product.

– Video: 1 kΩ, Unbalanced

– Audio: 4.7 Ω MIN., Unbalanced

– Control: 30 kΩ MIN., Unbalanced

• Output Load Impedance:

– RF: 75 Ω

– Video: 1 kΩ

– Audio: 4.7 kΩ

• Intermediate Frequency:

– Picture: 45.75 MHz

– Sound: 41.25 MHz

• Weight: 72 g ±10 g

• Applicable Standards:

– EIA Standard Number 544

– EIA Standard Number 16A

– FCC Standards

The RF pass-through feature is electrically controlled

via an external interface pin. Output channel 3 or 4 is

also electrically selected by asserting 5 V or ground on

an external pin. The internal tuner sample point is

always active, allowing the tuner and demodulator func-

tions to be used at all times, regardless of the condition

of the RF pass-through and the modulator output.

Demodulated audio, video AGC and AFT outputs are

also provided. The AGC control line from the demodula-

tor to the tuner is not accessible to the system designer.

– UL Standard

RF Data Sheet

12 3 4 5 6 7 8

中文翻译

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