Instruction/ maintenance manual of the product AD8HR Pacific Digital
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E Thank you for choosing the Y amaha AD8HR AD converter with remote microphone preamp. The AD8HR is an eight-channel AD converter equipped with remote microphone preamps that feature 96kHz, 24-bit linear AD conversion, 128-times oversampling, and a dynamic range of 110dB.
2 PRECAUTIONS PLEASE READ CAREFULL Y BEFORE PROCEEDING * Please keep this man ual in a safe place f or future ref erence. W ARNING Always follow the basic precautions listed below to avoid the possibility of serious injury or even death from electrical shock, short-circuiting, damages, fire or other hazards.
3 The abov e warning is located on the top of the unit. Explanation of Graphical Symbols The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the .
4 Part Names and Functions ............... 5 Front Panel ................................................ 5 Rear Panel .................................................. 6 Basic Operations ............................... 7 Selecting the W ordclock ...
Part Names and Functions 5 Front Panel A WORD CLOCK indicators These indicators indicate the currently select ed wo rd clock source. If the unit is not locking to the selected wor dclock source, the corresponding wo rd clock source indicator flashes.
6 Part Names and Functions Rear Panel A Grounding screw Fo r safet y , use this screw t o g round the AD8HR. The included power cable has a thr ee-pin plug .
Basic Operations 7 Selecting the W ordclock Y ou can select from the following wor dclock source options: internal clock (44.1kHz, 48kHz, 88.2kHz, and 96kHz), W ORD CL O CK IN, or DIGIT AL OUT A. 1 Press the [WORD CLOCK] button repeatedly to select the wordclock source.
8 Basic Operations Setting the High Pass Filter Each channel featur es a high pass filter (12dB/octav e) that you can turn on or off. Y ou can set indiv idual cut- off frequencies for each c hannel’ s hig h pass filter . 1 Press the Channel Select button to select a channel.
Basic Operations 9 Adjusting the LED Brightness Fo llow the steps below t o adjust the br ightness of the front panel LED and Gain displa y . 1 While pressing and holding down the Channel Select button of Channel 8, rotate the Gain control to adjust the brightness.
10 Connection Examples AES/EBU Connections U se a D-sub 25-pin AES/EBU cable to c onnect a digital audio dev ice that supports the AES/EBU format. T o connect a Y amaha PM5D or DM2000 to the AD8HR, first you must install an optional I/O car d (MY8-AE, MY8-AE96S, MY8-AE96, or MY16-AE) in the PM5D or DM2000.
Wordclocks 11 Fo r proper AD c onversion and digital audio data transmission and reception, the D8HRs and external digital audio dev ices must lock t o an identical wor dclock. The AD8HR is capable of transmitting a wo rd clock sig nal of 44.1kHz, 48kHz, 88.
12 Appendix General Specifications ■ Analog Input INPUT 1–8 XLR-3-31 Balanced AD converter 24-bit linear 128-times Oversampling ■ Digital Output DIGIT AL OUT A, B D-Sub 25-pin Balanced ■ Conn.
Appendix 13 Electrical Characteristics M easured at DIGIT AL OUT . Output impedance of signal generator: 150 Ω . ■ Frequency Response fs=44.1kHz or 48kHz @20Hz–20kHz, with reference to –1dBFs @1kHz fs=88.2kHz or 96kHz@20Hz-40kHz, with reference to –1dBFs @1kHz ■ Gain Error @1kHz ■ T otal Harmonic Distortion fs=44.
14 Appendix ■ LED Level Meter Error Messages The AD8HR aut omatically diag noses itself at the time of powe r up . If it detects a system abnormality , one of the following error messages appears. If an abnormality is detected, c onsult your Y amaha dealer .
Appendix 15 HA REMOTE Pin Assignment T able Dimensions *I f y ou do not intend to rack mount the AD8HR, attach the included rubber feet to the bottom surface of the unit. A ttac h the r ubber feet in the positions marked by small cir cles on the bottom.
For details of products, please contact your nearest Y amaha representativ e or the authorized distributor listed below . Pour plus de détails sur les produits, v euillez-vous adresser à Y amaha ou au distributeur le plus proche de vous figurant dans la liste suivante.
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If you already are a holder of Pacific Digital AD8HR, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Pacific Digital AD8HR.
However, one of the most important roles played by the user manual is to help in solving problems with Pacific Digital AD8HR. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Pacific Digital AD8HR along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
