User manual RANE RC 24A

[. . . ] Set the INPUT SELECT switch to AES/EBU or SPDIF for the appropriate input. Connect the AES/EBU OUTPUT on the rear of the RC-24A to whatever is receiving the 24-bit digital audio signal during playback (and monitoring). Connect the supplied Rane RS-1 remote power supply to the red POWER jack on the rear of RC-24A. Make sure the ADAT is plugged in and turned on. [. . . ] This push button switch lets you select which four tracks of the ADAT are converted back to 24-bit digital audio, and transmitted out the AES/EBU OUTPUT. An LED indicates whether you are playing tracks 1-4 or 5-8. These LEDs indicate the sample rate of the AES/EBU (or SPDIF) source (sync) input (44. 1kHz or 48kHz). These LEDs indicate the word length (in bits) of the AES/EBU (or SPDIF) source (sync) input. This switch engages 16-bit dithering and truncation on the AES/ EBU OUTPUT. Dither should be engaged when the AES/EBU OUTPUT is feeding a device that truncates the signal to 16 bits (e. g. DAT recorder, digital signal processors, and so on). REAR PANEL DESCRIPTION 1. The AES/EBU OUTPUT transmits digital audio conforming to the AES/EBU standard. Digital audio exiting this Output is identical to the original digital audio fed to the AES/EBU (or SPDIF) INPUT and recorded onto the ADAT. This Output is typically connected to a D/A converter, hard disk recorder or a CD mastering system. The AES/EBU OUTPUT follows international conventions, with pin 2 hot, pin 3 negative, and pin 1 tied to chassis ground. The AES/EBU INPUT follows the AES/EBU standard. Like the AES/EBU OUTPUT connector, pin 2 is hot, and pin 3 is not. This Input is typically connected to a digital audio source, such as an A/D convertor or the output of a digital mixer. The SPDIF INPUT is just like the AES/EBU INPUT, except data received here receives digital audio formatted with the consumer "Sony Philips Digital Interface Format". This switch allows you to select the desired Input (SPDIF or AES/EBU). Another way of putting it is: you must select the proper Input (the one you plugged a cable into). This interface connects the RC-24A to a device equipped with the ADAT OPTICAL INTERFACE (e. g. Use only Rane part #280-101 fiber optic cables. Plug the external power supply into this connector. Caution: Never connect anything except the Rane RS 1 AC power supply (enclosed with the unit) to the thing that looks like a red telephone jack on the rear of the RC-24A. This is a low-voltage AC power input, and connecting it to telephones, computer keyboards, or other devices will result in unpredictable, and potentially catastrophic, results. [. . . ] The 24-bit files can be backed up through a PAQRAT to maintain the highest quality in the audio data. When mastering a project that was mixed 16-bit, use the PAQRAT to make an EQ safety. The output from digital mastering consoles is usually 24-bit (the 24-bits is generated by the math used to perform digital EQ, limiting, compression and level changes). If the EQ tape is only 16-bit, the noise floor increases because of the rounded off math. [. . . ]