User manual APOGEE AMBUS AES 8+ CARD

[. . . ] The AES8+ card additionally provides both "double-wire" and "single-wire" operation at high sample rates (88. 2 and 96 kHz). High sample rates are only supported in units (such as the Trak2) that can handle high sample rates. On the AD-8000, the high sample rate modes are not available. AES8+ Card I/O Formats The AES8+ card supports the following digital audio formats: 1. Single-Wire 24-bit AES x 8: 8 channels of up to 24 bits at up to 96 kHz sample rate 2. [. . . ] Note that on the card switches, UP is OFF and DOWN is ON. This is the opposite of the switches on the rear of the AD-8000. Page 1 AES8+ I/O Card Operating Information v 1. 0 Configuring DIP switches 1 & 2 DIP switches 1 & 2 are used to configure the 8 channels of AES I/O to the desired format. Please note that when 96kHz is indicated, both 88. 2 and 96kHz sampling rates are available; likewise, when 48kHz is indicated, both 44. 1 and 48kHz sampling rates are available. Single-Wire 24-Bit AES x 8 Set DIP 1 & 2 ON, or down; AES I/O is now formatted as follows: · · at 88. 2/96kHz = 8 channels of 24-bit Single-Wire AES I/O at 44. 1/48kHz = 8 channels of 24-bit AES I/O Set DIP 1 & 2 OFF, or up; AES I/O is now formatted: · · at 88. 2/96kHz = 4 channels of 24-bit Double-Wire AES I/O at 44. 1/48kHz = 8 channels of 24-bit AES/EBU I/O Set DIP 1 OFF, DIP 2 ON; AES I/O is now formatted: · · at 88. 2/96kHz = two channels of 88. 2/96kHz 24-bit audio are transferred via 8 channels of 44. 1/48kHz 16-bit AES, for use with a multitrack 44. 1/48kHz 16-bit device. ("ABS96") at 44. 1/48kHz = 4 channels of 24-bit AES/EBU I/O are transferred via 8 channels of 44. 1/48 kHz AES, for use with a multitrack 44. 1/48kHz 16-bit device. (PaqRat 4/24 mode) Double-Wire 24-Bit AES x 4 ABS Bit-splitting (ABS96 at 88. 2/96; PaqRat 4/24 at 44. 1/48) Note: DIP 1 ON, DIP 2 OFF is not valid and will give undefined results. Configuring DIP switches 3 & 4 DIP switches 3 & 4 select the AES input pair to be used as a sync source, if the unit in which the AMBus AES8+ card is installed is set to lock to that card. Sync to AES In 1 & 2 · Set DIPs 3 & 4 ON Sync to AES In 3 & 4 · Set DIP 3 OFF, DIP 4 ON Sync to AES In 5 & 6 · Set DIP 3 ON, DIP 4 OFF Sync to AES In 7 & 8 · Set DIP 3 & 4 OFF Page 2 AES8+ I/O Card Operating Information v 1. 0 Interconnection The AES 8+ card provides eight channels of I/O on a single female 25-pin D-sub connector. This connector is wired to the same pinout as used by Yamaha for interfacing their AES digital devices. The pinout is as follows: 1 In Hot 1/2 5 Out Hot 1/2 14 In Cold 1/2 18 Out Cold 1/2 2 In Hot 3/4 6 Out Hot 3/4 15 In Cold 3/4 19 Out Cold 3/4 3 In Hot 5/6 7 Out Hot 5/6 16 In Cold 5/6 20 Out Cold 5/6 4 In Hot 7/8 8 Out Hot 7/8 17 In Cold 7/8 21 Out Cold 7/8 Pins 10, 12, 13, 22, 24 and 25 are connected to ground. Pins 9, 11 and 23 are not used. Channel routing LED matrix (AD-8000 only) Bit Splitting Modes Bit-splitting is indicated on the channel routing matrix. If 4-channel/24-bit (4/24) bit-splitting is enabled on one or two installed AMBus cards, then channels 1/2 and 3/4 light in the A or C row and channels 5/6 and 7/8 in the B and D row, depending on the position of the card(s). If 6-channel/20-bit (6/20) bit-splitting is enabled on an installed AMBus card, then the channel LEDs 1-6 for that row are turned on, indicating that channels 1-6 are selected for input. Source and Destination Monitor Modes When an AMBus card is in source monitor mode, and it is selected as the digital source, its outputs will be muted (DEST LEDs will be OFF for that card) to prevent the possibility of digital feedback or looping. If the unit is in "tape monitor" (destination) mode, and you are monitoring a selected AMBus card, only one of the DEST LEDs is illuminated ­ the one for the selected AMBus card. Remember that ABS is a two-way, realtime process: you can monitor a 24-bit ABS signal in destination mode while you are recording it (see below). Recording and Playback with the AES8 Card General Operation Having installed the card, select the mode you wish to use according to the DIP switch settings described above. We will describe the procedure for simple (non-ABS) operation, using the AD-8000 as the timing reference. The only differences when operating in an ABS mode are the settings of the card switches and the synchronization of multiple machines, if they are used, and these are covered in the following section. To synchronize the AD-8000 or Trak2 to a different timing source, see the manual. It is recommended to adjust DIP switch settings with the power off to ensure that settings changes are registered. Use a cable with the pinout shown above to link the card to the AES device. Normally the AD-8000 will be utilized as the sync source when the system is being used as an A/D conversion system, in which case set the SYNC SOURCE to CRYSTAL. [. . . ] Meanwhile, the input channels of the AD8000, whether set to analog or digital, will deliver signal to the AES outputs on the card (and the other digital interfaces for format conversion). Notes on ABS Operation and Multiple Cards (AD-8000) While in bit splitting mode: If a digital input pair is assigned which does not exist, the corresponding DIG x/x LEDs on the assigned channel pair will flash. For example, if in 4/24 mode, and a second AMBus card is not installed, LEDs DIG5/6 and DIG7/8 will flash if those channels are assigned as digital. If a card set to 4/24 mode is installed in slot A or C, it will pick up channels 1­4, and ch 1­4 on the dot matrix for that row are illuminated. If the card is in slot B or D, it will pick up channels 5­8, and ch 5-8 are lit up. [. . . ]