User manual ART DMPA

[. . . ] IMPORTANT SAFETY INSTRUCTIONS ­ READ FIRST This symbol, whenever it appears, alerts you to the presence of uninsulated dangerous voltage inside the enclosure-voltage that may be sufficient to constitute a risk of shock. This symbol, wherever it appears, alerts you to important operating and maintenance instructions in the accompanying literature. Read manual. Read instructions: Retain these safety and operating instructions for future reference. Heed all warnings printed here and on the equipment. Follow the operating instructions printed in this user guide. [. . . ] If you plan on using the cannon output (AES/EBU jack) make a sample rate selection on the right half of the selection range. If using the coaxial (RCA jack) output make a selection of the left side of the sample rate knob. The internal sample rate can be set from 44. 1KHz to 192KHz. Simply select the correct rate by turning the knob to the rate you need and the DMPA will use its' internal crystal controlled oscillator to accurately generate the selected timing. Some equipment is not capable of the available sample rates and may produce damaging side effects. Always turn down levels following the DMPA when changing the sample rate. External sync sources are Wordclock and ADAT INPUT. Wordclock is a 5V logic level signal interfaced by a BNC connector on the rear of the unit. The range of wordclock accepted by the DMPA is 28KHZ to 212 kHz. It is recommended that you use wordclock whenever possible, as this will minimize interface errors with other equipment. NOTE: When using the ADAT optical output, the maximum sample rate is limited to about 50KHz. If wordclock exceeds this the ADAT output (if selected) will fail. The ADAT Input on the rear panel is used as a timing reference as well as a source of data to be passed on to the ADAT output of the DMPA. If the unit CANNOT sync to an external source (either out of range, not connected or a system failure), the optical Output select switch will blink. (You may see this switch flash once between changing sample rates, indicating the fraction of a second it takes to settle to the new rate. NOTE: When using the ADAT Input as a sync source, the maximum sample rate is limited to about 50KHz Sample Rate (selection being set to ADAT - not wordclock or any other fixed sample rate). 4 Optical Switch The optical output jack of the DMPA can have one of two formats. When this switch is depressed AND lit blue, this jack will output 8 channels of ADAT. (ADAT cannot be output if the sample rate exceeds 48KHZ - the Sample Rate selection being set to an internal rate). In this case the switch cap will NOT be illuminated, and the output format will revert to 2-channel mode (TOSLINK). When ADAT output is active, The left channel of the DMPA is output on CH1, the right channel of the DMPA is CH2, and the rest of the channels consist of data received from the ADAT Input jack. When the switch is in the OUT position OR the switch cap is not lit, the output consists of two channels of digital audio in the format selected by the Sample Rate Switch. The Lighting of the optical switch cap serves a second function. If it is blinking, there is a timing problem in the digital section. This usually happens when there is not a valid external timing input selected. Front Panel Connections Instrument Inputs The 1/4" jacks on the front panel serve as an instrument input. [. . . ] 6) Ship only your unit and its power supply (keep your manual!) to: APPLIED RESEARCH AND TECHNOLOGY 215 TREMONT STREET ROCHESTER, NEW YORK 14608 ATTN: REPAIR DEPARTMENT, RA# ____________________ 7) Contact our Customer Service department at (585) 436-2720 for your Return Authorization number or questions regarding technical assistance or repairs. Customer Service hours are 9:00 AM to 5:00 PM Eastern Time, Monday through Friday. 4 DMPA SPECIFICATIONS Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6. 5" D x 19. 0" W x 3. 5" H Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Frequency Response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]