General

The PDE 452 is not available anymore.
A successor is under way.

General

• 4th Generation low-cost personal test encoder according to ETS standard
• Configuration and interfaces compatible with 3rd generation equipment
• Digital audio input allows direct connection with audio CD player
• ISO/MPEG (Layer II) audio bit rates from 32 kb/s up to 256 kb/s supported
• RS232 Program Associated Data input on audio encoder
• Internal test signal generation (e.g. PRBS, 1 kHz MPEG)
• Digital modulator supports DAB transmission mode I, II, III and IV
• Real-time modulation of 1 or 2 sub-channels and Fast Information Channel
• 36 MHz IF Modulator including RF mixer
• Includes Transmitter Identification Information for modes I, II and IV

Philips PDE452 is a test encoder for the Eureka-147 Digital Audio Broadcasting System. It offers state-of-the-art DAB technology in the most cost-effective way. Use in test & measurement environment, easy installation and operation and high reliability were the key considerations in the development. The application of high performance Digital Signal Processing technology together with our accumulated DAB know-how allowed the development of this DAB test and measurement encoder.
The PDE452 was developed by the Philips Advanced Systems and Applications Laboratory as a follow-up to the 3rd generation Philips PDS test system. At the date of introduction, the PDE452 was fully compliant with the Eureka 147 System. Recently, a fourth transmission mode has been added to the standard. To stay compliant with the Eureka-147 DAB System, Philips has upgraded the PDE452.

The PDE452 is fully complementary to the DAB452 reference receiver and compliant to the Eureka 147 DAB System as standardized in EBU ETSI draft prETS 300 401. The combination of the PDE452 with the Philips DAB452 reference receiver (or any other commercial available receiver) allows virtually anybody interested in DAB to start experiments, tests, measurements and demonstrations without huge investments in DAB development. Furthermore, the PDE452 is very suitable as DAB signal generator when developing prototype DAB receivers.

The PDE452 consists of the following parts:

• High quality digital sample rate converter. An innovative new monolithic device.
• ISO/MPEG Layer II audio encoder. Philips' renowned Musicore implementation
• COFDM channel encoder.
• IQ modulator. IF at 36 MHz or RF up to 1.5 GHz (with external generator).
• The complete system including a power supply is fitted in a small size cabinet. The equipment complies with European legal EMC requirements.

Features

Digital Sample Rate Converter

A high quality digital sample rate converter at the input allows direct connection to any digital audio source, such as a CD or a DCC player. The bit-rate of the audio encoder will automatically be set by the channel encoder according to the service selected.

Simultaneous encoding of two sub-channels

The channel encoder will process simultaneously one audio sub-channel and/or one data sub-channel for modulation. One out of a total of 15 services can be selected. The first 7 of these services correspond to the multiplex as defined for the Eureka 3rd generation equipment.
Audio services with bit rates of any multiple of 32 kb/s up to 256 kb/s can be selected.
Data services are available at 4 different error protection levels. This set of services allows evaluation of a wide range of combinations of protection levels and bit rates.

Internally generated MPEG test tones and PRBS

Internal generation of an MPEG encoded digital 1 kHz test tone allows for easy audio Signal to Noise ratio measurements. The internally generated PRBS allows for data Bit Error Rate measurements. LEDs on the front indicate the type of data currently being modulated.

Modulation of the Fast Information Channel (FIC)

Modulation of the FIC is an essential feature for receiver compliance testing. The Fast Information Channel (FIC) is modulated with static service data (MCI, ensemble label, service labels, service types and transmitter identification) on a 96 ms frame basis. One special service is reserved to modulate the FIC with either PRBS or with external data.