FＭ Multiplex Signal Generator

FM MULTIPLEX SIGNAL GENERATOR

MSG-2174

RDS/RBDS module
RDS (Radio Data System) is a broadcast service which is being adopted in Europe. It is based on the CENELEC standard EN50067:1998. RBDS(Radio Broadcast Data System) is a similar Service in North America.

○ Text information display

Text information displays title of music being played and traﬃc congestion○ Voice information

When audio source such as CD is being played, if information (such asinformation on a screen in an interrupted manner.

traﬃc congestion informatio n and/or weather forecast) enters, it isreplaced by a radio automatically and the announcement starts. Theoriginal audio source returns when the announcement ﬁnished.

Many local broadcast stations constitute a network under a key station to○ Network

cover large area. However frequencies assigned for each local broadcast

station are not same. By building a RDS network, even if a vehicle travels
long distance, the radio automaticall y tune radio frequency without
listenerʼ s tuning, the radio can keep receiving a program.
Signal level setting

0.0% to 10.0%

Record setting

00 to 10 (00 is a fixed pattern)

Modulation patterns

In addition to normal data, this module can output L-MSK modulation signal of ALL0 and ALL1.

DARC module
DARC (DAta Radio Channel) is a FM multiplex-broadcasting method which was developed by NHK (Japan Broadcasting Corporation)○ There was a text information service of FM broadcasting before, but it is used for traffic congestion information (VICS= Vehicle Information and Communication
System) now.

DESCRIPTION
MSG-2174 is an FM multiplex signal generator adopted a multiple module method. Combination of DARC modulator, RDS modulator, and FM stereomodulator can be chosen depending on usage of user. DARC FM multiplex method and RDS (RBDS) FM multiplex method are available by this one
unit, moreover a stereo modulator can be installed in same casing. By using application software attached to this unit, new data can be created andedited by a PC simply. This unit can output the data by being downloaded. Regarding DARC encoder function, we reduced its size by modifying
specifications of MSG-2170/2173 and achieved cost reduction. As for RDS function, usability for production line was prioritized because it is an existing
method. An FM-AM standard signal generator such as MEGURO MSG-2280 is required in order to generate signal from data which MSG-2174 encodes.

Signal level setting

Auto/Manual (0.0% to 15.0%)

Record setting

00 to 10 (00 is a fixed pattern)

Modulation patterns

In addition to normal data, this module can output L-MSK modulation signal of ALL0 and ALL1.

Stereo modulator
Stereo signal modulation

ON, OFF, and variability of modulation (0.0 to 125%)

Internal modulation frequency

EXT, 400Hz, 1kHz, 6.3kHz, 10kHz, 15kHz

Pre-emphasis

OFF, 25µS, 50 S, 75 S

Modulation modes

OFF, MAIN, L & R, SUB, LEFT, RIGHT, MONO

Editor program
FM multiplex data for outputting by MSG-2174 can be created andedited by a PC.

FEATURES
MSG-2174 allows combination which matches user’s needs. (DARC/RDS/Stereo modulator）【Combination example】

Maine frame

Main Flame + RDS only①

Main Flame + RDS + Stereo modulator
Main Flame + DARC only②

Main Flame + RDS + DARC
Main Flame + Stereo modulator only
Main Flame + DARC + Stereo modulator
Main Flame + RDS + DARC + Stereo modulatorUser’s Choice

MSG-2174
FM MULTIPLEX SIGNAL GENERATOR③

DARC MODULATORThis unit can measure and display bit error rate by comparison of demodulated signal from outside with PN9.

RDS MODULATORFM STEREO MODULATOR

POWER

External data save function（DARC only）
Internal recorder can save data which is input by external connector. (Max. 60 frames)

Back Panel
FUSE

Bit error rate measurement

USB
ADDRESS

Friendly interface
GND
PILOT INPUTMX INPUT

GP-IP
RS-232COPTION（STEREO MODULATOR)

This unit equips GP-IB, RS-232C, and USB.