User manual APOGEE DA-16X

[. . . ] 16-channel 24 bit, 192 kHz, D/A Converter User's Guide v2. 0 - January 2005 16-channel 24 bit, 192 kHz, D/A Converter V2. 0 - January 2005 User's Guide DA-16X ­ User's Guide APOGEE ELECTRONICS Warnings FCC 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 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 instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case the user will be required to take whatever measures necessary to correct the interference at his own expense. Copyright Notice The Apogee DA-16X is a computer-based device, and as such contains and uses software in ROMs. [. . . ] Likewise, pressing the UP or DOWN buttons will cycle through the values available for the selected parameter. Once a value is selected, it immediately becomes active, regardless if the LED is flashing to indicate that Setup mode has been enabled. If the CAL parameter has been selected, pressing and holding either the PREV or NEXT button will allow the user to enter Channel CAL mode; it's now possible to cycle through channels 1-16 (plus two oscillator settings) in order to make settings to individual channels. Please see page 5 for more details concerning CAL modes. Figure 1 depicts the parameter cycles of the DA-16X. PRIMARY PARAMETER LOOP PN Clock Source PN Sample PN Rate WC Ratio PN OPTICAL AES PN Format Format PN INPUT PN CAL Modes PN Press and hold PREV or NEXT CHANNEL CAL MODE LOOP PN CH-1 PN CH-2 PN CH-3 PN CH-4 PN etc. . . P N CH-16 P N OSC P N OSC P N LEVEL ON/OFF PREV Figure 1 P N NEXT 4 DA-16X ­ User's Guide APOGEE ELECTRONICS Navigating the Front Panel 3 continued 4 5 6 7 Parameters 3-7 are displayed in the Clock Window, as indicated at the top of this page. 3) CLOCK SOURCE ­ This parameter determines the clock source of the DA-16X, and may be set to INTernal crystal, WC input, or to the digital INPUT (as selected by the INPUT parameter). To use Optical input as a clock or input source, the ADAT 1-8 input must be connected first in precedence. When AES input is selected as a clock or input source, all inputs are scanned until a valid input is detected; this input is utilized as the clock source. SAMPLE RATE - When the CLOCK SOURCE is set to INTernal , the Sample Rate display indicates the frequency of the internally generated clock, and may be set to all standard sample rates between 44. 1 and 192 kHz. When the CLOCK SOURCE is set to either WC or INPUT, the display indicates the sample Word Clock I/O Frequency rate of the DA-16X as a result of locking 44. 1kHz 48kHz 88. 2kHz 96kHz 176. 4kHz to the selected source; the sample rate cannot be set by the user. WC Ratio ­ This parameter determines WC /2: 88. 2kHz 96kHz 176. 4kHz 192kHz the ratio between the word clock Input/ WC/4: 176. 4kHz 192kHz Output frequency and the unit's sample rate. Figure 2 indicates the resultant Resultant DA-16X Sample Rate DA-16X sample rate given a specific WC Figure 2 Frequency Ratio setting and word clock input frequency. Likewise, the word clock output frequency may be determined given a specific WC Ratio setting and DA-16X sample rate. This parameter should be used to adjust the DA-16X word clock I/O to accommodate the requirements of specific digital systems. For example, to configure the DA-16X to lock to a 48kHz word clock input and run at a sample rate of 192kHz, set WC Ratio to WC fs/4. Lock indication ­ These LEDs indicate the Lock status of the DA-16X's C777 clock. Two levels of lock precision are displayed, Wide and Narrow. When the Narrow LED and Lock "exclamation point" are lit, the DA-16X has locked to the selected CLOCK SOURCE in such a way to ensure the highest quality D-to-A conversion. If the Wide LED or only the upper section of the Lock exclamation point lights, the stability of the clock source is questionable, and should be verified. Thanks to SureLock, Apogee's intelligent clock continuity algorithm, the DA-16X will output a stable clock signal even if the selected CLOCK SOURCE is interrupted. When SureLock is engaged, the arrow section of the Lock exclamation point flashes to indicate a loss of the clock source, while the Narrow LED and blue point light solidly to indicate a stable clock output. 7) CAL mode indicator ­ This LED indicates that either Global or Channel CALibration mode is enabled, and that the digital to analog conversion level may be calibrated. Global CAL allows the calibration of all 16 channels simultaneously, while Channel CAL allows calibration of individual channels. [. . . ] Apogee's AES16IP-IFC breakout cable can connect here to provide 8 XLR female connectors. 6) WC IN - This BNC connection accepts a TTL Logic clock signal. Termination of the word clock input may be engaged with an internal switch; please see "Internal Adjustments". 7) WC OUT - This BNC connection provides a TTL Logic clock signal output. [. . . ]