User manual YAMAHA AD824

[. . . ] AD CONVERTER Owner's Manual WORD CLOCK INTERNAL 44. 1kHz 48kHz BNC SLOT PEAK NOMINAL SIGNAL PEAK NOMINAL SIGNAL GAIN dB POWER ON OFF +48V 1 SEL 2 3 4 5 6 7 8 +48V +48V MASTER OFF ON SEL AD CONVERTER Keep This Manual For Future Reference. E FCC INFORMATION (U. S. A. ) 1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT!This product, when installed as indicated in the instructions contained in this manual, meets FCC requirements. Modifications not expressly approved by Yamaha may void your authority, granted by the FCC, to use the product. [. . . ] Optional mini YGDAI (Yamaha General Digital Audio Interface) cards offer a variety of digital output interfaces, with support for all the popular digital audio interconnect formats, including AES/EBU, ADAT, and Tascam TDIF-1. Analog inputs feature electronically balanced XLRs, high-quality mic preamps, independently switchable 48-volt phantom powering, and rotary gain adjustment. Inputs can be used with either microphones or line-level sources. Analog outboard equipment can be patched into each channel by using the electronically-balanced analog insert points on two 1/4" TRS phone jacks. Remote control from a Yamaha DME32, personal computer, or other device is possible using an exclusive control protocol. Installation The AD824 can be used freestanding on a stable surface, somewhere that complies with the important information at the beginning of this manual, or mounted in a rack. When mounting the AD824 in a rack, leave adequate ventilation space around the AD824 (at least 10 cm of free space behind). If the AD824 is mounted in a portable rack case, keep the rear of the case open when using the AD824 so as not to obstruct the flow of air from the air vents. Do not mount the AD824 next to equipment that produces a lot of heat, such as a power amplifier. Connecting the Power Cord Warning: Turn off all equipment before making any connections. Connect the power-cord plug to a suitable AC wall outlet, one that conforms to the power supply requirements stated on the AD824 rear panel. Turning On the Power To prevent audible thumps and clicks, turn on your audio equipment in the following order (reverse this order when turning off)--sound sources, AD824, mixer or recorder (e. g. , 02R, DME32, D24, etc. ), power amplifiers. 1 POWER ON OFF Press the [POWER] switch to turn on the AD824. The AD824 starts up and the POWER indicator lights up. Press the [POWER] switch again to turn off the AD824. The POWER indicator goes out. 2 AD824--Owner's Manual 2 Chapter 2--Touring the AD824 2 Touring the AD824 Front Panel 1 2 3 45 WORD CLOCK INTERNAL 44. 1kHz 48kHz BNC SLOT PEAK NOMINAL SIGNAL PEAK NOMINAL SIGNAL GAIN dB POWER ON OFF +48V 1 SEL 2 3 4 5 6 7 8 +48V +48V MASTER OFF ON SEL AD CONVERTER 6 789 J K LM A PEAK, NOMINAL & SIGNAL indicators These indicators show the signal level of each channel and light up as follows: PEAK 3 dB below maximum input level. NOMINAL 14 dB below maximum input level. SIGNAL 34 dB below maximum input level. B GAIN display This 3-digit, 7-segment display shows the gain setting of the selected channel. C GAIN control This rotary control is used to set the gain of the selected channel. D POWER indicator This indicator lights up when the AD824 is powered up. E POWER switch This switch is used to turn on the power to the AD824. See "Turning On the Power" on page 1 for more information. F WORD CLOCK indicators These indicators show the selected wordclock source. When the AD824 cannot lock to the selected source, the corresponding indicator flashes. G WORD CLOCK Source button This button is used to select the wordclock source: 44. 1 kHz internal, 48 kHz internal, BNC, or SLOT. H Channel SEL indicators These indicators show which channel is currently selected. I Channel SEL buttons These buttons are used to select channels for use with the gain and +48V phantom power functions. AD824--Owner's Manual Rear Panel 3 J Channel +48V indicators These indicators show whether the +48V phantom power is on or off for each channel. K +48V on/off button This button is used to set the +48V phantom power for the selected channel. L +48V MASTER indicator This indicator shows whether the MASTER +48V phantom power switch is on or off. M +48V MASTER switch This switch is used to turn on and off the +48V phantom power master supply. Security Cover For certain applications you may wish to fit a protective cover over the AD824's GAIN controls and switches. Although Yamaha do not make such a cover, the AD824 has four fixing holes to affix a custom-made cover. If you fit such a cover, make sure that the fixing screws do not protrude inside the AD824 by more than 10 mm. The fixing holes accept M3-size machine screws, and are spaced 45. 0 mm vertically, 410 mm horizontally. Rear Panel 2 NVERTER AD824 3 COM PC RS422 4 5 OUT 67 8 7 6 5 4 3 2 1 75 IN ON OFF WORD CLOCK RS422 INPUT (BAL) 8 J K SLOT 8 7 6 5 4 3 2 1 OUT (BAL) 8 7 6 5 4 3 2 1 INSERT (BAL) IN 1 9 A Power cable The power cable is used to connect the AD824 to an AC outlet. See "Connecting the Power Cord" on page 1 for more information. B COM RS422 port This 9-pin D-sub connector is used to connect the AD824 to the next AD824 in a multiple-unit system. C COM PC/RS422 switch This switch should be set to RS422 when the COM PC/RS422 port is connected to a DME32 or the previous AD824 in a multiple-unit system, or PC when it's connected to a PC. AD824--Owner's Manual 4 Chapter 2--Touring the AD824 D COM PC/RS422 port This 9-pin D-sub connector is for connecting the AD824 to a device for remote control, such as a Yamaha DME32 or personal computer. It's also used to connect to the previous AD824 in a multiple-unit system. E WORD CLOCK OUT connector This BNC connector transmits the wordclock signal. F WORD CLOCK 75 ON/OFF switch This switch is used to terminate the wordclock signal received at the WORD CLOCK IN. See "Wordclocks" on page 14 for more information. G WORD CLOCK IN connector This BNC connector is used to connect an external wordclock source. [. . . ] Termination is typically applied at the last device, although it depends on the distribution method being used. The AD824's WORD CLOCK 75 ON/OFF switch allows the AD824 to be connected in a variety of ways. The following examples show three ways in which wordclock signals can be distributed and how termination should be applied in each case. Wordclock Distribution Box In this example, a dedicated wordclock distribution box is used to supply a wordclock signal to each device individually. Termination is applied at each device. Wordclock master WC OUT (BNC) Wordclock distribution box WC IN (BNC) WC IN (BNC) WC IN (BNC) WC IN (BNC) Device-A Termination = ON Wordclock slave Device-B Termination = ON Wordclock slave Device-C Termination = ON Wordclock slave Device-D Termination = ON Wordclock slave Bus Distribution In this example, the wordclock signal is distributed via a common line. [. . . ]