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UDR700
Encrypted Wireless Receiver
  • Encrypted digital RF transmission with 128-bit key
  • 256 frequencies in 100kHz steps
  • Digital Rota-versity reception
  • CD quality audio
  • -40dBu to +15dBu analog audio output
  • AES-3id digital audio output
  • 10-segment LED indicators for RF and audio levels
  • Machined aluminum construction
  • 19” half-rack configuration
  • Universal 90-240 VAC power input
  • External 11-17 VDC power input

PDFDownload the Quick Start Guide for this product in PDF format.
PDFDownload the Technical Data sheet (200kB) for this product in PDF format.
PDFDownload the Quick Start Guide for the 700 Series System in PDF format.
PDFDownload the Instruction Manual for the 700 Series System in PDF format.
PDFDownload white paper on encryption

Replacement Antennas


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The UDR700 receiver is a 19” half-rack 1RU design for use with Lectrosonics 700 Series encrypted digital wireless transmitters. The receiver provides a full complement of controls and indicators for quick setup and full information at a glance.

The 700 Series wireless system provides a combination of CD quality audio with frequency response to 20 kHz, a digital RF link operating on standard UHF frequencies, and advanced encryption of the transmitted signal for applications requiring a high level of security. The audio quality is perfectly at home in the most demanding studio and stage environments, while the true cryptography used in the transmitted RF signal is ideal for security needs in corporate and governmental applications.

Audio is sampled at 44.1 kHz and digitized with a 24-bit converter at the transmitter input. The audio data stream is digitally compressed, adding entropy as a first step in a multi-level encryption process. Random timings during setup on the receiver seed a psuedo-random number generator to create a chaotic scrambling sequence that is mixed with the compressed audio data to generate a cryptographically secure data stream. The signal is decrypted in the the UDR700 receiver and ouptut as as analog audio on a balanced XLR connector, and AES-3id digital audio on a BNC connector.