Tascam TM-D4000 Owner's Manual

Also see for TM-D4000: Operation manual Technical documentation

Contents

3 - System setup—CLOCK setup3–2If the Professional format is selected, theresulting data output from the RCA STEREOOUT jack will probably be unusable by mostdomestic equipment.3.1.2 Consumer optionsIf the chosen output is Consumer, hold down theSHIFT key and press the right switch of POD 4 tochange the SCMS (copy-protect) settings betweenFREE (SCMS disabled), ONCE (standard SCMSone-generation) and NO COPY ((copy-prohibit).An appropriate message will appear on screen, andthese settings are stored in memory.In addition, the category of consumer audio can beset using the SHIFT key along with the left switch ofPOD 4 to cycle through the following values:This allows the TM-D4000 to pose as an alternativeaudio source, for instance if an MD deck can onlyaccept signals from a CD or another MD deck, or in abroadcast situation, a certain category may be neces-sary for use with other equipment.If an attempt is made to set the category with the Pro-fessional format setting, an error message, “No Cate-gory for AES/EBU” will appear on screen.3.1.3 Word length and ditheringThe word length can be selected as being either 16,20 or 24 bits in length.If the selected word length is less than 24 bits, youmay choose to dither the resulting output. Ditheringhelps to reduce quantization noise, but results in aslightly lower signal-to-noise ratio. Choose eitherOFF, rectangular (RECT) or triangular (TRI)dithering. The shape names refer to the probabilitydistribution of the noise which is used in the dither-ing process.Typically, triangular dithering gives better quantiza-tion noise reduction than rectangular, but the signal-to-noise ratio is not as good.NOTEThe word length from the output busses isalways set to 24 bits.3.2 CLOCK setupWARNINGThere should be one, and only one, wordclock source in a digital audio setup. Multipleword clocks in a setup may result in noisewhich can damage monitoring equipment(speakers and amplifiers).The word clock source is selected in the followingway:1 With the SHIFT indicator unlit, press theDIGITAL I/O key until the screen below isshown (note that the exact screen may differfrom that shown here, depending on thenumber and the type of the interface cardsfitted in the expansion slots):2 Move the cursor to the box which containsthe description of the desired clock source.General GeneralCD CDLD Laser (usually disc)MD MDCODEC PCM CodecMIXER Mixeraa. TM-D4000 default settingSRC SRC (Sample Rate Converter)SAMPLER SamplerDAT DATDVTR DVTRDCC DCCTV-J Japanese broadcast digitalTV-EUR European broadcast digitalTV-USA American broadcast digitalTV Broadcast digitalSynth SynthesizerMicrophone MicrophonePro A/D Copy-free A/D converterA/D A/D converterRAM Solid state reproducer