BI-DIRECTIONAL DATA TRANSMISSION LINE MONITORING CIRCUIT

The circuit can monitor screen quality and line defect with a display device/monitor by accepting transmitting data sent through a bidirectional data transmission line as receiving data. The circuit includes: a data controller (4), processing and displaying address, channel selective information and...

Full description

Saved in:
Bibliographic Details
Main Author LEE, SHI - YONG
Format Patent
LanguageEnglish
Korean
Published 02.02.1995
Edition6
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
Online AccessGet full text

Cover

More Information
Summary:The circuit can monitor screen quality and line defect with a display device/monitor by accepting transmitting data sent through a bidirectional data transmission line as receiving data. The circuit includes: a data controller (4), processing and displaying address, channel selective information and voltage check information; a display device (3); a keypad (1), accepting address; channel up/down switch (2), inputting channel selective information; a 1st interface (5); a FSK modulator (6); a FSK-modulating address and channel information; a RF mixer (7); a mixing FSK modulation signal and video signal 2-way amplifier (8); a separator (9); a FSK demodulator (10); a 2nd interface (11); a PLL controller (12); a tuner (13); a RF demodulator (15); and AC/DC voltage modulator (16); a DC voltage check block (17); a data generator (18); an ASK modulator (19); a band pass filter (20); an ASK demodulator (21); a monitor (20).
Bibliography:Application Number: KR19910017543