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Audio Technologies Inc. DMM100BAT
4-channel Digital Match-Maker, Battery Power Option

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Audio Technologies Inc. DMM100BAT

The DMM100 is a level, impedance and connector matcher. AES/EBU digital signals share the same general data format regardless of the mode of transmission. A consumer device is most likely to output a S/PDIF signal in which a few bits of the data stream indicate whether the signal source is an original or a first generation copy in order to control unauthorized large scale duplication. A professional device may indicate whether the encoded audio is a stereo signal or two monaural channels. The DMM100 doesn’t care about any of these details and just tries to output a clean copy of the original data stream to the smart boxes that do.

You may find it necessary to run a low level RCA type (S/PDIF) digital output a long distance in a high noise environment where a balanced XLR high-level connection would be a better choice. Or you may run that high level XLR balanced 110-ohm line smack dab against a 75 ohm BNC socket. Or that nice piece of pro-sumer gear only comes with a strange digital spigot that blinks at you (TOSLINK. optical). For all these minor tears in the fabric of creation we offer you the DMM100 Digital Matchmaker and we offer personal thanks to all those designers who managed to create four incompatible ways to do the same job.

External 24VDC power module that draws up to .1A. Loop-thru DC connectors allow multiple DMM100 to operate from a single power module. Allow one power module for every three one-rack spaces. Use power modules WA100-1, -2 or -2E and loop-thru cables 20602-1.

The DMM100-BAT can operate from either four AA batteries in cover-mounted holders or an external 24VDC power module. Fresh alkaline batteries will provide a minimum of 40 hours operation. Toslink optical drivers can be disabled with an internal jumper plug (JP1) to increase battery life by 50%. Batteries are cut off by external power and can be used as an automatically switched backup power source.

Features:

  • The DMM100 accepts AES/EBU digital audio signals froman XLR female 110-ohm line, a BNC or RCA 75 ohm line or a Toslink opticalfiber. Electricalinputs as low as .10Vp-p and optical inputs corresponding toa maximum plasticfiber cable length of 10 meters are properly detected andreshaped.
  • The DMM100 provides a signal bandwidth of 12MHz tohandle digital audiosampling rates of 27 to 96kHz.
  • The DMM100 simultaneously drives an XLR male 110-ohmoutput at 3.5Vp-p anda BNC or RCA 75ohm output at 1.0Vp-p and a Toslinkoptical transmitter.
  • Propagation delay through the DMM100 is less than100nS and jitter is under5nSp-p.
  • All electrical inputs and outputs are transformerisolated, floating and DCblocked to eliminate ground loop hum and jitter andto prevent transformersaturation due to accidental superimposed DC linevoltages. All inputs andoutputs are properly terminated for minimum signalreflection.
  • A green Signal Present indicator illuminates when a data carrier isoutputfrom the DMM100.

TMGR# DMM100BAT

Unit Field Protection Kit
Audio Technologies Inc. PROK-1
Unit Field Protection Kit

The PROK-1 is a unit protection kit, which consists of a set of side plates with, attached side brackets. The side plates protect the front panel controls and the rear XLR connectors from impact damage and provide attachment points for a ...

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Photo AA CELLS, 4 Pack
Varta V4206201404
Photo AA CELLS, 4 Pack

VARTA Type: 4806Reference USA: AAElectrochemical System: primary alkaline manganeseVoltage: 1.5V

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