144 Owner`s Manual
Contents
1. D TO A CONVERTER O n 9 2 CH1 CH3 CH5 CH7 18 6 APHEX SYSTEMS 4 17 SUNLESS Cs ee 10 WATTS PIN 13 NC NO CONNECTION CC From ADAT source To ANALOG input Model 142 Analog to ADAT Converter MODEL 142 ANALOG INPUTS CHAN POS NEG GND Ie ONCE MA Ge Sow ae tg NC G G G G CONVERTER D N X 7 x 7 3 2 CH1 CH3 CH5 CH7 E 46 APHEX SYSTEMS 6 4 17 5 I 10 WATTS MADE IN USA PIN 13 NC NO CONNECTION From WORD CLOCK source To ADAT input From ANALOG source Model 144 AES ADAT Bi directional Converter o MODEL 144 ADAT AES OUTPUTS AES INPUTS ADAT o ADAT TO AES INPUT 8 CH5 6 CH3 4 CH1 2 f 1 2 3 4 CH5 6 CH7 8 OUTPUT AES RI d G G G G G G G G APHEX SYSTEMS A ETE AC LINE SUN VALLEY CA Oc 10 WATTS MADE IN USA From ADAT source To AES input From AES source Channel 1 2 must To ADAT input be connected Page 6 mm 11068 Randall St Sun Valley CA 91352 USA Tel 818 767 2929 Fax 818 767 2641 Web www aphex com Email sales aphex com2. Operation of this equipment in a residential area is likely to cause interference in which case the user will be required to correct the interference at his own expense The user is cautioned that changes and modifications made to the equipment without approval of the manufacturer could void the user s authority to operate this equipment It is suggested that the user use only shielded and grounded cables to ensure compliance with FCC Rules 4 1 Model 141 ADAT to Analog Converter Model 142 Analog to ADAT Converter Model 144 AES ADAT Bi directional Converter 2 0 Installation and Interfacing Rack Installation All three models are 1 75 high 1RU 8 25 wide and 7 25 deep They can be rack mounted by using the Aphex accessory 44 008SA rack kit One kit can be used to mount a pair of units or a single unit in 1RU Follow the instructions included with the rack kit for assembly Make sure that there is sufficient airflow around the units Do not mount them directly on top of equipment that generates excessive heat or near equipment that generates large magnetic hum fields AC connections All the models have internal power supplies that are preset to a specific operating voltage Make sure that the unit is set to the proper voltage for your area before connecting to AC power Audio connections Analog audio connections in the Models 141 and 142 are through TASCAM analog standard 25 pin D Sub Both input on the Model 1
3. signal either at 44 1kHz or 48kHz connection to the Model 141 the LED will turn green Page 3 Model 141 ADAT to Analog Converter Model 142 Analog to ADAT Converter Model 144 AES ADAT Bi directional Converter When there is a valid word clock connection to the Model 142 at 48 kHz only the LED will turn green There is a red LED next to each input trimmer on Model 142 It illuminates when the input signal exceeds 24dBu to indicate clipping on that channel There are three green LED s on the Model 144 When power is applied the Power LED is lit When a valid signal is present either at 44 1kHz or at 48kHz the LOCKED LED is lit When there is AES input there must be the connection to AES Channel 1 2 at either 44 1 or 48kHz the AES LOCKED LED is lit If there are any red LED s illuminated it indicates a problem somewhere in the system Note The ADAT to AES circuit is completely independent from the AES to ADAT circuit Analog Audio Level 24dBu is the maximum analog audio input level into the Model 142 and the maximum analog audio output level from the Model 141 This level corresponds to OdBfs full scale in the digital domain There is a trimmer for each analog audio input to the Model 142 that adjusts the gain by 12dB If the unit is being fed by a professional level device 0Vu 4dBu the gain trimmer should be set to 0 If the Model 142 is being fed by a consumer level device OVu 10dB
4. 42 and output on the Model 141 are female D Sub connectors on the chassis D Sub connections are as follows ETE luu __ Balanced inputs The analog audio input stages in the Model 142 are balanced They can be driven by either a balanced or an unbalanced input If unbalanced connect the Hot to the pin the input connector Connect ground to the G pin and pin Maximum input level balanced or unbalanced is 24dBu Balanced outputs The analog audio outputs of the Model 141 are impedance balanced This is a true balanced circuit however audio signals appear only on the connector pins If driving a balanced input connect the output pins and to the appropriate input connections It is recommended that the ground be connected only at the receiving end If driving an unbalanced input connect to the hot input and connect to the ground connection at the receiving end You can leave the unconnected or it can be tied to ground Maximum output level is 24dBu Page 2 Model 141 ADAT to Analog Converter Model 142 Analog to ADAT Converter Model 144 AES ADAT Bi directional Converter ADAT connections ADAT connections use a standard TOSLINK optical transmitter and receiver on the Model 144 a receiver on the Model 141 and a transmitter on the Model 142 Keep ADAT connections as short as possible AES connectio
5. INTERFACES MODEL 141 142 144 OWNER S GUIDE APHEX CHANNEL DTOACONVERTER MODEL 141 POWER LOCKED CHANNELA TOD CONVERTER MODEL 142 POWER LOCKED TOAES AES TO MODEL 144 ADAT AES POWER LOCKED LOCKED APHEX SYSTEMS Model 141 ADAT to Analog Converter Model 142 Analog to ADAT Converter Model 144 AES ADAT Bi directional Converter 1 0 Introduction The Aphex Models 141 142 and 144 were developed as interfaces between the Aphex Anaconda digital snake system and other devices Each model was designed to do its job without any extra unnecessary bells or whistles While they each fulfill that design specification each model is an excellent useful product in it own right Since the I O of the Anaconda is there is connection in each model The eight channel format has been a standard in the audio industry for years It is a reliable mature cost effective technology albeit with limitations The prime limitation is the distance that ADAT audio can be safely transmitted through Lightpipe fiber Some claim that it could be as far as 30 feet but our experience shows that there can be significant audible artifacts at 20 feet We strongly recommend that the distance be as short as possible preferably less than 10 feet 3 meters The other limitation is that its maximum sample rate is 48kHz for eight channel operation There is a t
6. V the trimmer should be set to 12 There is a trimmer for each analog audio output of the Model 141 that adjusts the gain by 12 dB If the unit is feeding a professional level device OVu 4 dBu then the trimmer should be set to 04 If the Model 141 is feeding a consummer level device O Vu 10 dBV the trimmer should be set to 12 Page 4 Model 141 ADAT to Analog Converter Model 142 Analog to ADAT Converter Model 144 AES ADAT Bi directional Converter 3 0 specification Specifications Input OdBfs 24dBu OdBfs Max Output 24dBu OdBfs OdBfs THD Noise 100dB 100dB N A Dynamic Range 114dB 114dB N A Trim Range 12dB 12dB N A Jitter lt 1nsec lt 1nsec lt 1nsec Power Consumption 10 Watts Frequency Response 20Hz 20kHz 0 5dB N A Size 1RU 1 2 Rack Width 1 75 H x 8 25 W x 7 25 D Weight 3 5lbs 1 6kg 44 5mm x 209 5mm x 184 2mm Connectors Toslink Toslink Toslink 2 25 Pin D sub Tascam Format 25 Pin D sub Tascam Format 15 Pin D sub Aphex Format 2 BNC Word Clock All specifications are subject to change without notice COPYRIGHT 2008 by Aphex Systems LTD All rights reserved All Aphex products are trademarks or registered trademarks of Aphex Systems LTD Other brand and product names are Trademarks of their respective holders Page 5 Model 141 ADAT to Analog Converter MODEL 141 ANALOG OUTPUTS CHAN POS NEG GND 24 12 25 8 CHANNEL ADAT CH2 CH6 CH8 2 1
7. echnology called S Mux that doubles the maximum frequency but halves the channel count We have elected to stay with the sample rate of 48kHz in the Model 142 but Models 141 and 144 can work at 44 1 or 48kHz There are many other products on the market that do similar functions But none as simply or as well or as cost effectively as these units You will enjoy many years of excellent uninterrupted performance Safety Declarations TO PREVENT FIRE OR SHOCK HAZARD DO NOT EXPOSE THIS DEVICE TO RAIN OR MOISTURE DO NOT REMOVE THE COVER NO USER SERVICEABLE PARTS INSIDE SHOCK HAZARD REFER SERVICING TO QUALIFIED PERSONNEL ONLY DO NOT OPEN ATTENTION AFIN DEVITER DES CHOCS ELECTRIQUES f N ENLEVEZ PAS LE COUVERCLE IL N Y A AUCUNE AVIS RISQUE DE CHOC ELECTRIQUE PIECES D ENTRETIEN A L INT RIEUR REFEREZ LES NE PAS OUVIR REPARACIONES A UNE PERSONNE QUALIFEE CAUTION For protection against electric shock do not remove the cover No user serviceable parts inside WARNING This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the operating guide may cause interference to radio communica tions
8. ns AES connections use Aphex standard 15 pin D Sub The AES output from the Model 144 is female and the AES input to the Model 144 is male The connections are as follows CH1 amp 2 CHI amp 4 CH5 amp b 7 3 Word clock The Anaconda system is designed to work at 48kHz sampling frequency only In order to achieve its unmatched performance the clock must be within 5Hz of 48kHz That is why the Anaconda has its own super stable and accurate clock generator and distribution system The Model 142 has a word clock input on a standard BNC with an internal 75Q terminating resistor If there is no word clock connected the clock will be approximately 48kHz but not exactly It is highly recommended that a 48kHz word clock be connected to the Model 142 even if the unit is not part of an Anaconda system The Model 141 needs no clock as it converts whatever is on the ADAT input to analog It can accept 44 1kHz or 48kHz The Model 144 has no separate clock input However the same word clock either 44 1kHz or 48kHz must be used for all the AES sources Also AES input channels 1 and 2 must be connected to the Model 144 in order for the clock to be derived for the ADAT output LED Indicators Models 141 and 142 have a single bi color red green LED labeled Power Locked The LED will be red when power is supplied but without any ADAT connected to the Model 141 or word clock connected to the Model 142 When there is a valid ADAT
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