■ OVERVIEW

The RWC2100F, includes multi-channel Analog Transmitters, a receiver and an audio analyzer. 3-TX channels can be transmitted simultaneously and each channel can be set to FM-RDS or AM. FM-RDS provides many editable protocol parameters such as PID, PS NAME, (e)RT(+), etc. It also provides many functional tests such as AF, EON, TMC, etc. The RDS receiver receives RDS signals over the air and displays RDS parameters. The received RDS signal can be recorded as a file, so that it can be played back with the FM-RDS TX function. The audio analyzer not only measures the audio signal quality (SINAD, THDN and SNR) and frequency, but also shows audio waveform and audio spectrum. All functions can be controlled by PC software and all parameters can be saved and loaded.

■ SERVICE FOLLOWING CONCEPT

To test the service following function of receivers in labs, two or more broadcasting emulators are required. Especially, to test 'the seamless linking function', two or more broadcasting emulators should be synchronized with adjustable sync delay. Using RWC2010B or RWC2100F, many combination of service following test (DAB to DAB, DAB to DRM, DAB to FM, DRM to DRM, DRM to FM) can be performed in labs quite easily. Users can assign one RWC2010B as Master and other RWC2010B or RWC2100F as Slave. You can emulate the various broadcast system environment and test the functionality of your receivers perfectly with low cost.

■ Service following: The operation of maintaining the same audio or data content that the user has selected in varying reception conditions

■ Seamless linking: The operation of switching to another transmitter and continuing service without audio discontinuity

■ SEAMLESS LINKING TEST SOLUTION

It provides a seamless linking test solution with adjustable audio synchronization between two emulators.

■ SERVICE LINKING TEST TOOL

PC application software for the "Service (Seamless) Linking Test" among the digital broadcasting services such as DAB, DRM, and FM RDS is provided. This application allows users to connect up to 4 pieces of our test equipment, RWC2010C and RWC2100F, to build a wide range of test environments using a mixed combination of DAB, DRM and FM RDS services. For AF configuration in DAB and DRM, it is allowed to enable up to 3 services for one multiplex. For FM RDS, up to 3 services are allowed to use. The AF information of each equipment (station) can be defined with checkboxes intuitively and the resultant AF information is summarized and shown at the right side of the application. Moreover, power profiles can be defined with transmitting power values and time durations according to users' test scenarios and easily run to check how users' receiver works under the defined test environment.

■ SINGLE FREQUENCY NETWORK (SFN) TEST CONCEPT

To test SFN in labs, two broadcasting emulator are required. And two broadcasting emulator should be synchronized with adjustable sync delay. Using two RWC2010Bs, SFN test can be performed in labs very easily.

■ SFN TEST SOLUTION

SFN is a broadcasting network in which multiple transmitters simultaneously send the same signal through the same frequency channel. By utilizing the spectrum efficiently, it can provide a greater number of programs than conventional MFN. However, SFN transmission can be traced back to the DUT as a serious multipath propagation, which can cause fading. Therefore, the DAB receiver must be designed to guarantee the reception performance in the SFN environment. Using two RWC2010Bs, you can easily and inexpensively create an SFN environment in LABs to measure the performance of the DUT. RWC2010B can be synchronized with another RWC2010B in us unit, and the same contents can be provided using ETI/MDI files.

■ MEASURING SENSITIVITY OF RADIO USING SINAD

Generally amplifiers have harmonic distortion and noise in their audio output signals. SINAD is useful for quantifying the ratio of power to all harmonics and noise components present in an audio signal. Using the THD and SINAD values, users can find out where the signal distortion is caused. Users can easily find and fix the distortion of radio receivers by measuring SINAD and THD using the Audio Analyzer of RWC2100F.

RX sensitivity can be measured by monitoring the audio output of radio receivers (DUT) with the audio analyzer of the RWC2100F while decrementing the TX power of the RWC2010B.

RX sensitivity can be measured by monitoring the audio output of radio receivers (DUT) with the audio analyzer while decrementing the FM TX power of the RWC2100F.

■ EXAMPLE OF RADIO TEST SOLUTION

The RWC2010B can generate all kinds of combinations of DAB, DRM, FM-RDS and AM signals, and the affordable RWC2100F can generate multiple FM-RDS and AM signals. The combination of RWC2010B and RWC2100F will be the most cost-effective solution and can provide a complete solution for production systems requiring multi-standard broadcast signals. All testers are controlled via LAN for providing solutions for various scenarios, and are bootable with saved settings without a PC program to be used in fixed production systems.