Xử lí phát sóng
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Máy phát thanh số tổng hợp FM Stereo 708
The Model 708 is a standalone stereo generator intended for use with an external FM audio processing system. The composite multiplex signal, including the stereo pilot, is generated with digital synthesis techniques to assure optimum stereo separation without need for calibration adjustments. Additionally, the 708 provides internal combining for one or two SCA or RDS/RBDS subcarriers.
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Xử lý phát thanh AM 235
The Model 235 incorporates all audio processing needs for AM broadcasting in a single, easy-to-use package. "Gain-riding" AGC is followed by variable low- and high-frequency EQ, 3-band compression, an asymmetrical, integrated limiter/clipper peak controller, and a low-pass function that satisfies NRSC or other "audio mask" specifications. A rear-panel RS-232 data port allows the processing presets to be programmed or updated by computer or modem; the necessary software is included.
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Xử lý phát thanh FM 718 David III
The 718 "DAVID-III" combines comprehensive multiband audio processing with a digital-synthesis stereo generator for unparalleled performance and great value. Pulse-width-modulation (PWM) techniques ensure rock-stable operation and a very competitive, yet effortless sound. Density and equalization adjustments allow the broadcaster to tailor the 'signature' of the on-air sound. Proprietary PIPP* final limiting and an adjustable composite clipper guarantee full carrier modulation for any program audio source or characteristic.
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Bộ xử lý âm thanh 261
The 261 Utility Processor provides an all-inclusive system for general audio normalization, level management and FM-airchain use. It combines the functions of gated, gain-riding AGC, dynamic range compression and independent broadband and high-frequency program peak limiting. Processing functions may be selected from the front panel separately or combined for comprehensive program audio control. The 261 features AES-digital and L/R analog inputs; digital and analog outputs are available simultaneously. Digital input sample rates are detected automatically, while multiple output sample rates can be easily selected from the front panel. Extra features like alarms and a front panel lockout switch make the 261 a complete package for broadcasters looking for comprehensive level management. 100% digital DSP architecture ensures easy setup, transparent signal path, and unobtrusive menu-driven operation.
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Bộ xử lý phát thanh AM 222
The 222 was originally developed as a "post-processor" to ensure US broadcasters' compliance with FCC-mandated occupied-bandwidth regulations. It incorporates a fast, asymmetrical peak limiter, independent pre-emphasis-protection limiting, and a very sharp-cutoff low-pass filter with proprietary overshoot control. The 222 finds ready application in a wide variety of AM broadcast situations. In addition to the NRSC 10kHz cutoff for medium-wave AM broadcasting in the US, any high-frequency protection characteristic between 4.5kHz and 15kHz can readily be accommodated to meet other domestic and overseas needs. Though the 222 is intended to provide basic final limiting, a "floating platform" release characteristic yields sufficient program dynamics compression that often the unit can be run "barefoot" between the console and transmitter with good results.
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Bộ xử lý phát thanh FM/HD 719 DAVID IV
New Rev 3.0 Firmware as of June 2014! The DAVID IV is the fourth generation processor in our DAVID (vs. Goliath) series of FM and HD Radio air-chain processors. Our streamlined, 100% DSP-based audio engine gives you total leverage over the most important sonic ‘signature’ parameters, while smart controls allow you to enhance program material quickly and effectively. Processing includes 5 bands of dynamics compression with equalization, intelligent gain-riding AGC (Automatic Gain Control), Bass and Stereo Field Enhancements, and our proprietary PIPP™ (Polarity Independent Peak Processing) limiter. The DAVID IV combines a remarkably clean sound with a premium FM Stereo Generator that also includes internal metering with combining for the RDS(RadioData System) subcarrier. Setup is quick, and operation is intuitive via the multi menu front-panel interface or IP based remote control software, so you can make adjustments from the comfort of your favorite listening environment. DAVID IV Remote Control Software DAVID IV Remote Control Software Presets are provided for popular world formats*, and user settings can easily be saved/backed up and shared over station networks. TCP/IP connectivity is virtually automatic and allows full remote control and access from anywhere in the world. Processing and stereo generator aside, the DAVID IV features a rugged closed box design (no fans or heat-sinks needed), with ultra low latency hardware allowing for direct off-air monitoring, and power to live audio in less than 1 second. But how does it sound? When it comes to audio performance, the DAVID IV really delivers. With tight lows, open mids, crisp but controlled highs, and the dynamic flexibility to really stand out, the DAVID IV’s sound promises results on par with products more than double or triple it’s price class. It has never been easier (or more affordable) to achieve maximum audio performance without breaking the budget. But don’t take our word for it, get one and demo it yourself-30 days risk free! *see Features section for a full list of included presets.
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71901 DAVID IV HD Radio Delay Board
The 719-01 HD Radio Delay Board is an optional drop-in accessory for our DAVID IV FM/HD Radio Broadcast Processor. It enables up to 9.999 seconds of audio delay for the Composite (MPX) and/or analog and digital program line outputs. Because there is an obligatory delay of roughly 8 seconds in the digital program encoding and decoding process present in HD Radio, the analog-FM signal must be delayed by this same amount to arrive in sync with the digital signal. This time-aligning “diversity delay,” as it is called, is enabled in the DAVID IV with this optional accessory circuit board that is simply plugged into a header strip on the main board. The delay is adjustable between zero and 9.999 seconds in one-millisecond increments, and once installed, activates new a menu adjustment, using either the front-panel jog wheel or remote PC software. Use of this accessory board requires at least Rev. 2 firmware/software in your accompanying DAVID IV FM/HD Radio Broadcast Processor.
TX25 Plus & TX250 Plus FM Transmitters
THE TX 25 PLUS AND TX 250 PLUS FM EXCITERS ARE DESIGNED TO ACCEPT STEREO MONO MPX AUDIO SIGNALS TO BE MODULATED IN FM AND TO AMPLIFY THE RF. THE TX 25 PLUS AND TX 250 PLUS FM ARE EQUIPPED WITH AN INNOVATIVE AND HIGH-PERFORMANCE POWER SUPPLY STAGE «SWITCHING-MODE MAINS DIRECT», WITHOUT MAINS TRANSFORMER (THE MAINS VOLTAGE CAN VARY FROM 80 TO 265 VAC WITH NO VARIATION ON THE OUTPUT POWER). MAJOR FEATURES INCLUDE HIGH INSULATION FROM MAINS, HIGH OVERALL EFFICIENCY, MODULAR DESIGN FOR FRIENDLY MAINTENANCE, COMPLIANCE WITH EUROPEAN NOrms EN61000-4-3 AND LONG TERM RELIABILITY. IN THESE FM EXCITERS, AN AGC AUDIO CIRCUIT CONTROL IS INCLUDED TO KEEP THE MODULATION LEVEL BELOW THE MAXIMUM FIGURES ALLOWED IN COMPLIANCE WITH CEPT/ERC 5401 E. THE RF OUTPUT SPECIFICATIONS HAVE BEEN DRASTICALLY IMPROVED, THUS OBTAINING FIGURES WHICH ARE COMPARABLE TO DIGITAL TRANSMITTERS. THESE FM EXCITERS CAN BE CONTROLLED LOCALLY BY A PC OR REMOTELY BY MODEM. THE TX 25 PLUS IS A COMPLETELY SOLID STATE EXCITER, FREQUENCY AGILE CONTROLLABLE FROM THE FRONT PANEL WITH ADJUSTABLE OUTPUT POWER UP TO 25 W. THE POWER DEVICE USED TO OBTAIN 25 W IS THE PHILIPS BLF 245. IN TX 250 PLUS FM EXCITER, WHICH CAN BE USED AS A STAND-ALONE TRANSMITTER AS WELL, A POWER AMPLIFIER MODULE WITH THE POWER DEVICE PHILIPS 278, ABLE TO GRANT 250 W OUTPUT POWER IN THE ENTIRE FREQUENCY RANGE HAS BE ADDED.
Anten FM là sản phẩm do Công ty cổ phần phát triển phát thanh truyền hình BDC nghiên cứu, thiết kế và sản xuất. Các đặc trưng sản phẩm, đặc tính kỹ thuật đã được nghiên cứu, thử nghiệm và ứng dụng các tiến bộ khoa học kỹ thuật tiên tiến nhất, tối ưu hóa phục vụ tốt nhất mục đích sử dụng.Sản phẩm của công ty BDC đã được cấp dấu chất lượng nghành và đạt được uy tín cao về chất lượng, độ bền trong lĩnh vực Phát thanh. Với những kỹ thuật tiên tiến sản phẩm đạt được tính năng kỹ thuật cao nhất.
Cụm thu loa không dây FM FSW11
Bộ thu FM không dây là sản phẩm do công ty BDC nghiên cứu, thiết kế và sản xuất, ứng dụng các công nghệ kỹ thuật hiện đại tạo nên một sản phẩm tiêu chuẩn công nghiệp. Thiết bị được trang bị bộ thu sóng (tuner) chất lượng cao, sử dụng mạch vòng khóa pha tạo tần số thu ổn định, độ nhạy cao. Khuyếch đại công suất sử dụng các IC khuyếch đại đời mới cho hiệu suất cao, chất lượng âm thanh hoàn hảo. Ứng dụng công nghệ điều khiển bằng vi xử lý, các chế độ hoạt động của thiết bị luôn được đảm bảo tối ưu. Các chỉ tiêu kỹ thuật hoạt động được hiển thị đầy đủ, rõ ràng trên màn hình LCD, giao diện người dùng thân thiện. Công nghệ điều khiển từ xa kỹ thuật số bằng RDS cho phép dễ dàng quản lý liên tục hoạt động của hệ thống từ phòng máy mà không làm ảnh hưởng tới chất lượng âm thanh. Sản phẩm khi được xuất xưởng đều được kiểm định đạt tiêu chuẩn Việt nam.