DBS-front-end-unit-for-digital - Sharp Electronics Corp.

Features

Built-in 8PSK/QPSK demodulator

With a built-in 8PSK demodulator compatible with the digital BS

broadcast modulation system, the unit contributes to reduction in set development term (QPSK demodulation for CS

is also built-in)

Line-up of models equipped with various demodulation chips

Compatible with 8PSK demodulation chips that will satisfy users requirements

Compact, thin design

Can handle BS data broadcast reception, with a thickness of 13 mm which can be installed in PCI card, in the same

configuration as for CS digital

DBS front-end unit for digital BS

Block diagram

In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in using any

SHARP devices shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device specification sheets before using

any SHARP device. Specifications are subject to change without notice for improvement.

We have developed a DBS front-end with link integrated 8PSK demodulator for reducing the development time

of BS digital broadcast receiver sets, which require higher quality performance than CS digital broadcasts.

Specifications

Input frequency: 950 to 2150 MHz

Circuit system: Direct conversion

Channel selection system: PLL synthesizer

Installed LINK-IC manufacturer:

NEC/Fujitsu

Input signal level: -65 to -25 dBm

External dimensions / Inner volume:

35.8 x 70 x 12.9 mm / 27 cm3

Outline dimensions

Applications

Digital BS broadcast reception

tuner (STB)

Digital BS broadcast reception

compatible TV/VTR

BS data broadcast reception

compatible PCI cards for PCs

DBS front-end with link for digital BS

*1 *1) Can also be installed in digital CS broadcast receiver set

RF input

950 to

2,150MHz

RF output

B1A B1B

LPF

(5V) TUN

(30V)

PLL oscillation

circuit B2

(5V)

HPF

RF amp circuit block

RF ATT

IQ demodulation circuit block

Direct conversion IC

LPF

SDA SCL VDD

(2.5V)

LINK IC

8PSK/QPSK

demodulation circuit block

AGC

control

Wideband 90 phase shifter

PLL

synthesizer

(LNB)

TSA0-TSA7

PACA

TENA

TCLKA

TERA

RESET

SYNC

TMRN

BCS

BERMS

12.9 70.0

35.9

3 28

(Pin No.)

1 RF IN

2 RF OUT

3 B1A

4 B1B

6 BERMS

7 SYNC

8 TMRN

9 B3

10 TUN

11 B2

12 BCS

13 SCL

14 SDA

15 VDD

16 TSA0

17 TSA1

18 TSA2

19 TSA3

20 TSA4

21 TSA5

22 TSA6

23 TSA7

24 TCLKA

25 TENA

26 PACA

27 TERA

28 RESET

(Unit: mm)