Datasheet > QR96

QR96

更新时间： 2024-09-30 03:39:39

品牌	Logo	应用领域
RADIOMETRIX		/
页数	文件大小	规格书
2页	173K
描述
9600 Baud Quasi DC Data Recovery Module

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数据手册

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QR96 数据手册

Radiometrix

Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England

27 February 2008

QR96

Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233

Wide.co.uk

9 6 0 0 Ba u d Q u a s i DC Da t a Re c o ve r y Mo d u l e

The Quasi DC Recovery circuit (QR96) can be

used to improve data recovery of receiver if the

raw data is transmitted without any bit

balancing. The QR96 measures the minimum

and maximum levels of the AF output of the

receiver, averages that and compares the

original AF output signal with it. The module

can be used in applications where raw (non-bit

balanced) data need to be transmitted and

received between two UARTs.

Figure 1: QR96

Features

ꢀ

Recovery of data signals with frequencies down to 2Hz

Tolerates time between bit transitions as long as 250ms

Permits non-bit balanced data stream like straight ASCII

Improves link margin by about 6dB, hence doubles the line of sight range on raw data

Customisable to different data, preamble timing requirements (e.g. NMEA sentences)

Supply Voltage: 3 to 5V

Small size: 18.5 x 10 x 5.5mm

Pin outs and foot print compatible with Radiometrix SIL Receivers

Compared to conventional Data Slicer circuit currently used in the most of the FSK receivers, Quasi DC

Recovery circuit can extract non-bit balanced data at RF signal level that is 6dB lower, resulting in double the

range.

Conventional Data Slicers are based on simple ‘RC integrate and compare’ method to digitise the

demodulated analogue signal, whereas, the QR96 samples positive and negative peaks of the Audio (AF)

output and then averages them, before using that voltage as the comparator reference. QR96 behaves better

on very unbalanced (raw) data, and at the start of bursts (where the simple RC takes time to acquire or

charged to the mid average point).

sales@radiometrix.com

QR96 - Short Technical Overview

www.radiometrix.com

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