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Sennheiser EM 3731-II, EM 3732-II Additional information, HDP, HDP, HDP, HDP, noise, RF link, Squelch, Squelch, Inherent, Transmitter, of the RF link, HiDyn plus™ (HDP) noise reduction

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Additional information

Additional information

HiDyn plus™ (HDP) noise reductionRF linkInherentnoiseof the RF link

Transmitter

Receiver

This product family is equipped with HDP, the Sennheiser noise reduction system that reduces RF interference. It increases the signal-to-noise ratio in wireless audio transmission to more than 110 dB. HDP is a wideband compander system which compresses the audio signal in the transmitter in a 2:1 ratio (related to dB) to lift it above the inherent noise floor of the RF link. In the receiver the signal is expanded in an identical and opposite way in a 1:2 ratio to restore the original signal, at the same time reducing the RF noise to below the noise floor of the receiver.

HDP has been specially developed for high quality radio microphone systems.

All receivers of the product family feature a AES3 digital audio output for digital mixing consoles. In the receiver the audio signal is digitalized as early as possible so that the noise reduction (compander) can be realized digitally.

Only transmitters and receivers that are equipped with HDP can work correctly with each other. If non HDP equipment was mixed with HDP, the dynamic range would be drastically reduced and the transmission would sound blunt and flat. HDP is permanently active and cannot be switched off.

Squelch

Depending on the strength of the received RF signal, the receiver’s audio output is opened or muted. Via the “Squelch” menu, the squelch threshold can be adjusted in 13 steps from 0 to 30 μV.

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Contents

Instruction manual Contents Important safety instructions Page Page The product family The frequency bank system Delivery includes Product overview Overview of the displays 776.000 Hz 01.01CH Reception display Mute NAME AF COM COM Putting the receiver into operation Slide the receiver into the 19" rack Secure the rack mount “ears” Connecting the antennas CAUTION! Danger of short-circuitdue to uninsulated antennas even when you switch the receiver off Page Daisy chaining receivers Connecting the receiver to the mains/ disconnecting the receiver from the mains CAUTION! Damage to the device due to electric current Ensure a reliable mains ground connection of the receiver – especially when you are using multi-outletpower strips or extension cables Plug the mains connector into the wall socket Connecting devices with AES3 digital input Connecting an external word clock generator Scanning Using the receiver Deactivating the lock mode Synchronizing a transmitter with the receiver frequency Identified Sorting channels using the “Wireless Systems Manager” software Using the operating menu 776.000 Hz Working with the operating menu esc 777.005MHz 848.225MHz Setting mode +12 dB +18 dB save NAME B.CH press and hold Adjustment tips for the operating menu CEL .16 CEL Repeat the last two steps to enter the remaining characters After you have entered the six characters of the name, press the save button Adjusting the squelch threshold To adjust the squelch threshold: After you have adjusted the desired squelch threshold, press the save button Page Page Page Page Before starting the scan, switch all transmitters of your system Turn the jog dial 7 until the arrow points to “Scan new” Press the jog dial 7 to start the scan Releasing channels that are used or subject to interference Turn the jog dial 7 until the arrow points to “Scan reset” NAME 01.01CH 03.03CH NAME Auto Page Cleaning the receiver Additional information Diversity reception If a problem occurs Accessories Specifications Page Manufacturer Declarations