Users Manual - Full Compass
Contents
1. to O 1dB corner Passband ripple Stop Band Stop Band Attenuation Group Delay De emphasis Error 0 1 dB 10 Hz to 20 kHz 0 5 deg 0 21 770 Hz 48 0 kHz 0 19935 Hz 44 1 kHz 0 01 dB 26230 Hz 48 0 kHz 24100 Hz 44 1 kHz 72 dB 520 us 48 0 kHz 567 us Q 44 1 kHz 0 3 dB B CHANNEL 24BIT DiGITaL anatoa converter Analog Outputs Configuration Differential full scale ouput voltage Output voltage range Power supply Cross coupled balanced 7 75 Vrms 12 V each output rejection ratio 60 dB Output impedance 50 Q Output short circuit current 70 mA Output drive capability 300 m Wordclock output Type BNC Impedance 75 Q Voltage Level 0 5 V ADAT input Type Toslink optical Format 8 channel 24 bit Power supply requirements Input voltage Maximum current consumption Other information 12 V AC 10 15 0 8 A Unit size Unit weight Operating temperature range Operating humidity 230 X 250 X 42 5 mm 1 8 kg 0 40 C 0 90 non condensing AD24 Block Diagramm Clock source Bos Wordclock PLL ADAT in ADAT decoder De emphasis EOS Sample rate 24 bit D A converter digital level detector 24 bit D A converter digital level detector Mr LOCK Analog Out Peak Acti2. attenuation is achieved by a 5 1 transformer The alternative to transformer cou pling is to use a special cable set up as shown in Fig ure 4 If you get hum try the ground lifted version in Figure 5 You will almost certainly need include the attenuators shown There are 4 dB unbalanced units out there but they are rare A XLR to RCA connection 2 kQ 510 kQ AN Use two conductor shielded twisted cable l black _ o shield Female B XLR to TS connection red black shield 2 two conductor shielded twisted cable 1 Female A XLR to RCA connection two conductor shielded twisted cable shield Female B XLR to TS connection 2 kQ AM AM l ae lt 510 kQ two conductor shielded twisted cable shield Female A Shield connected to chassis contact on source equipment two conductor shielded twisted cable two conductor shielded twisted cable Female B CHANNEL 24BIT DiGITaL anatoa converTer 9 Sometimes balanced connections tend to hum This Avoiding hum is either a grounding problem or a ground loop problem For a detailed explanation check the Where does the hum come from chapter below In a nutshell to eliminate the hum try the following 1 Check that all equipment is pro
3. the written permis sion of Swissonic AG or if the product serial number has been removed or defaced All implied warranties including implied warranties of merchantability and fitness for a particular purpose are limited in duration to one year from the date of the original retail purchase of this product The warranty and remedies set forth above are exclusive and in lieu of all others oral or written express or implied No Swissonic distributor dealer agent or employee is authorized to make any modification extension or addition to this warranty Swissonic AG is not responsible for special incidental or consequential damses resulting from any breach of warranty or under any legal theory including lost profits downtime goodwill damage or replacement of equipment and property and cost of recovering reprogramming or reproducing any program or data stored in or used with Swissonic products Some states do not allow the exclusion or limitation of implied warranties or liability for incidental or consequential damages so the above limitation or exclusion may not apply to you This warranty gives you specific legal rights and you may have other rights which vary from state to state Uznach Switzerland September 15 1999 CE 13 This equipment has been tested and found to com ply with the limits for a class B digital device pursuant to part 15 of the FCC rules These limits are designed to provide reasonable prote
4. to your digital source Power the unit Wait for the LOCK LED to turn on Enjoy your 24 bit quality sound Never connect anything except an approved Swissonic power supply to the power jack This is a 12 V AC input and requires special care if you do not have a power supply exactly like the one originally packed with your unit This unit does not ground the chassis through the power cord Make sure that the unit is grounded either to another chassis that is earth grounded or directly to the grounding screw on an AC outlet The DA24 unit is a 24 bit 8 channel D A converter capable of operation at 44 1 kHz and 48 0 kHz sample rates with the possibility of muting the lower 8 bits in order to permit 16bit ADAT operation The state of the art technology level and the extreme simplicity in operation together with a very reasonable cost makes the DA24 unit the obvious choice for the all range of digital audio applications One DA24 unit one 4 m optical fiber cable one power adapter one manual warranty information True 24 bit Crystal Digital Analog converters 128x oversampling architecture Low clock jitter sensitivity 115 dB SNRCEIAJ Balanced XLR outputs 4 dB Two LED level monitoring with digital level detectors Wordclock output 44 1 and 48 0 kHz Sampling rates E ADAT input provided with optical fiber TOS LINK connector m De emphasis support for redbook CD compatibility m 1HE Half rack case B CHANNEL
5. 24BIT DIGITAL ANaLoG converTer 5 Front Panel Layout swionic 60 66 o 00 1 PEAK LEDs Indicate that the peak signal level on the corresponding channel is exceeding 2d BFS ACTIVE LEDs Indicate that the signal level on the corresponding channel is above 40 dBFS DE EMPHASIS switch Turns on off the de emphasis digital filter DE EMPHASIS ON LED Indicates that the de emphasis digital filter is working SAMPLE RATE switch Selects the sample rate for the de emphasis filter as 48 0 kHz or 44 1 kHz 48 0 44 1 LEDs Indicate the current selection for the sample rate RESOLUTION switch Selects the resolution of the digital signal on the ADAT IN port 24 16 bit LEDs Indicate the selected resolution for the digital signal on the ADAT IN port LOCK LED Indicate that the unit has successfully extracted the wordclock from the digital signal present on the ADAT IN port 10 POWER switch Turns the unit on and off 11 PWR ON LED Indicates that the unit is supplied with power and turned on YN Oo OO A NM o Rear Panel Layout 1 WC Out BNC connector You can access here the internal wordelock extracted from the ADAT input 12 V AC jack This is the power supply input Connect only to an approved power supply EARTH terminal Use this binding post to ground the chassis of the unit ADAT IN Toslink optical connector Keep this plug with a protective cover when not in use OUT 1 8 XLR connectors Eight balanc
6. 8 CHANNEL 24 BIT DIGITaL aNaLOG converter Users AMEEN t J gora Pr p d po mo amm j RE A 4 pa gt E E PY d PU 2 gt E ue B Was as ara a asa a aa PAUVAAVIRIU I 8 CHANNEL 24 BIT DIGITaL anatoc converter Statement of conformity To whom it may concern This letter is our statement of conformity to the appro priate CE certifications Based on testing performed in November 1998 our products swissonic AD24 and swissonic DA24meet all pertinent worldwide regulations including CE This certification is based on test reports generated by EMC Testcenter Z rich AG Zurich Switzerland Copies of the reports are available upon request Uznach September 15 1999 c Daniel Feusi C C General Manager Swissonic AG Users Manual Swissonic AG P O Box 304 CH 8730 Uznach Switzerland Phone 41552858610 Fax 41552858615 www swissonic com infoQswissonic com Swissonic America 407 Stony Point RD Santa Rosa CA 95401 Phone 707 577 7691 Fax 707 577 7692 www swissonic com infousa swissonic com B CHANNEL 24 BIT Diairau anaLOG converter Quick Start Connect your digital source to the ADAT In port from Brief description Package contents Features the rear panel Connect your audio equipment to the OUT 1 8 connectors from the rear panel Power the unit using the power supply found in the package Set the De emphasis off Set the Resolution according
7. and Phone 41552858610 Fax 41552858615 www swissonic com info swissonic com Swissonic America 407 Stony Point RD Santa Rosa CA 95401 Phone 707 577 7691 Fax 707 577 7692 www swissonic com infousa swissonic com
8. ction against harmful interfer ence in a residental in stallation This equipment generates ises and can radiate radio frequency emergency and if not in stalled and used in accor dance with the instruc tion manual may cause harmful interference to radio communications However there is no guarantee that inter ference will not occur in a particular installation If this equipment does cause interference to radio or television equip ment reception which can be turning the equip ment off and on the user is encouraged to correct the interference by any combination of the fol lowing measures m Relocate or reorient the receiving antenna m Increase the separation between the equipment and the receiver m Plug the equipment into an outlet on a circuit different from that to which the receiver is connected If necessary you can consult a dealer or expe rienced radio television technician for additional assistance PLEASE NOTE only equipment certified to comply with Class B computer input output devices terminals print ers etc should be attached to this equip ment and it must have sheilded interface cables in order to comply with the Class B FCC limits on RF emissions WARNING changes or modifications to this unit not expressly approved by the party responsible for compliance could voide the user s authority to operate the equipment Swissonic AG P O Box 304 CH 8730 Uznach Switzerl
9. d line transmission chain all noise will couple equally in the two signal lines At the receiving end the difference of the two input voltages will always be the clean input signal Any asymmetry in the signal path will defeat the noise rejection of the balanced connection to a certain degree and should be avoided The differential output level of the DA24 corresponding to a O dbFS digital sinewave is 20 dBu 7 75V rms This corresponds to a peak differential output voltage of 11 V The output voltage range of both DA24 s output lines is x12 V This ensures that a full scale signal can be output without distortion even with one of the outputs tied to ground as required when con necting to unbalanced equipment The DA24 is designed to interface directly to profes sional level 4 dB balanced output equipment The preferred type of connection is via a shielded twisted pair cable with the shield connected to the chassis ground at both ends Connecting the shield at both ends ensures proper protection against RFI radio frequency interference as well as low frequency interference and should be employed whenever possible Some balanced equipment uses TRS 1 4 inch jacks instead of the XLR connectors They are equivalent with the tip corresponding to pin 2 of the XLR positive signal the ring corresponding to pin 3 negative signal and the sleeve corresponding to pin 1 ground When connecting to semi pro level
10. de emphasis filter This filter eliminates the high frequency range boost used sometimes at CD recording You can activate deactivate this digital filter by pressing the De emphasis button In order to operate properly the digital filter must know the data sample rate If you know that your digital source is playing at 44 1 kHz please set the Sample Rate at 44 1 If you known that your digital source is playing at 48 0 kHz set the Sample Rate at 48 0 All time constants of the filter vary proportionally with the sample rate An erroneous sample rate although it will not affect the SNR can have unwanted effects on the sound since the signal is filtered with the wrong filter DA 24 uses electronically balanced cross coupled output buffers This architecture emulates the output behavior of transformers Either output can be tied to ground and the output level will remain the same This guarantees the maximum level of noise rejection attainable with trasnformerless designs when connecting to either balanced or unbalanced equip ment B CHANNEL 24BIT DIGITAL ANALOG converTer The low impedance 50 and high drive current capability C7O mA typicaD of the DA24 output stages enable it to drive very long cables up to 300 m 1000 ft without problems The balanced configuration is used in professional equipment for it s ability to eliminate noise picked by the long interconnects Given the symmetrical con figuration of the balance
11. ed analog outputs Each output corresponds to an ADAT channel Pin 1 2 chassis ground Pin 2 positive Pin 32 negative Clipping level 20 dBu ao A N B CHANNEL 24 BIT DiGITaL anatoa converter Operation De emphasis Gain T1 50 ps 210 dB s Frequency F1 2 3 183 kHz 10 61 kHz Figure 1 Interfacing with the DA24 DA24 Analog Outputs The DA24 unit has a very simple operation mode 1 Connect your digital source using the provided optical fiber cable or an ADAT compatible optical fiber cable to the ADAT IN port from the rear panel 2 Supply the unit with unregulated 12 V AC using the jack marked as 12 V AC from the rear panel 3 Please connect your audio equipment using twisted pair balanced cables provided with XLR connectors to the OUT 1 OUT8 outputs from the rear panel 4 Power the unit using the POWER button The PWR ON led will light up 5 Turn your digital source on 6 In less than one second you should see the LOCK LED turning on If the LED does not turn on then either you have no signal on the ADAT connection or you digital source plays at 32 kHz or lower frequencies 7 Select the bit resolution of your digital source using the RESOLUTION button If you are using a common 16 bit ADAT recorder be sure to turn the Resolution to 16 bits to mask any noise present in the lower 8 bits 8 Enjoy the true 24 bit sound quality The DA24 unit supports CD operation by providing a digital
12. equipment C10 dB the high output of the DA24 will certainly A XLR to XLR connection red black red black shield 2 two conductor shielded twisted cable shield 1 Female Male B XLR to TRS connection red black red black shield 2 two conductor shielded twisted cable shield 1 Female DA24 Output Levels Connecting the DA24 to balanced output equipment Figure 2 B CHANNEL 24 BIT DIGITaL anatoa converter Connecting to unbalanced equipment Unbalanced Balanced Not connected to chassis plastic jack Case lug mat connect to chassis not required Transformer T v AY chassis grounded to pin1 earth grounded metal enclosure Figure 3 Figure 4 Figure 5 Figure 6 overdrive the inputs of such gear resulting in heavy distortion To avoid this situation a passive attenuator pad or step down transformer should be used as shown in Figure 2 Mixing balanced and unbalanced equipment is generally a bad idea as the two systems aren t compatible Such mixing is the most frequent cause of hum in audio systems However in a non ideal world it cannot usually be avoided The best way to do it albeit the most expensive is to use an isolating transformer see Figure 3 It can also be used to change the signal levels to consumer levels 14 dB of voltage
13. perly earthed Equipment with a line plug is usually earthed through that Check the earth on the mains socket Equipment with outboard power supplies like the AD24 is not earthed through its power connection It must be grounded elsewhere either through the cable shield to a properly earthed unit or directly using the binding post on the back 2 Try toggling ground lift switches on related units Use this step with caution as it can induce problems in other parts of the system 3 If all else fails you may need to lift the shield on one end of the interconnections If you already have an established shield lifting practice use that If not we recommend lifting the ground at the transmitter end This will provide better RFI protection Try the cable configuration in Figure 6 A B C in that order 10 B CHANNEL 24 BIT DiGITaL anatoa converter Specifications Resolution Dynamic performance 24 16 bits Signal to noise ratio Dynamic Range Total harmonic distortion amp noise Inter channel isolation 115 dB EIAJ 106 dB CA weighted 24 bit 103 dB unweighted 24 bit 96 dB A weighted 16 bit 94 dB unweighted 16 bit 97 dB 24 bit O dB 83 dB 24 bit 20 dB 43 dB 24 bit 60 dB 93 dB 16 bit O dB 74 dB 16 bit 20 dB 34 dB 16 bit 60 dB 110 dB Combined Digital and Analog Filter Characteristics Frequerncy response Deviation from linear phase Passband
14. ve Analog Out Peak Active De emphasis on De emphasis and resolution control circuit Sample rate 48 0 Sample rate 44 1 Resolution 24 bit 15V AC Linear Resolution 16 bit d 585 power supplies Power On Limited Warranty on Hardware Swissonic AG warrant this equipment against defects in materials and workmanship for a period of twelve months from the date of original retail purchase If you discover a defect first write or call Swissonic AG at 0041 55 285 86 10 to obtain a Return Merchandise Authorization Number No service will be performed on any product returned without prior authorization Swissonic AG will at its option repair or replace the product at no charge to you provided you return it during the warranty period with transportation charges prepaid to Swissonic AG Gewerbezentrum Rotfarb 8730 Uznach Switzerland You must use the product s original packing material for in shipment and insure the shipment for the value of the product Please include your name address telephone number a description of the problem and the original dated bill of sale with the returned unit and print the Return Merchandise Authorization Number on the outside of the below the shipping address This warranty does not apply if the equipment has been damaged by accident abuse misuse or misappli cation has been modified without
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