RME Audio DMC-842 User's Guide

User’s Guide DMC-842 The Digital Microphone Interface 8-Channel Digital Microphone Interface with Line Outputs 8-Channel AES t

10 User’s Guide DMC-842 © RME I64 MADI Card MADI module featuring thru-input, Delay Compensation, Auto ID, MIDI over MADI, remote via MADI BOB3

User’s Guide DMC-842 © RME11 CE / FCC Compliance CE This device has been tested and found to comply with the limits of the European Council Direc-t

12 User’s Guide DMC-842 © RME

User’s Guide DMC-842 © RME13 User’s Guide DMC-842 Usage and Operation

14 User’s Guide DMC-842 © RME 8. Front Panel Controls 8.1 Select Key and Rotary Encoder (SET) The rotary encoder SET is a highly intuitive mult

User’s Guide DMC-842 © RME15 8.2 Clock Section The source and frequency of the unit's clock is configured in the CLOCK SECTION. The button CLO

16 User’s Guide DMC-842 © RME 8.4 Remote REMOTE defines the source of MIDI remote control commands. Choices are the MIDI DIN jack, the D-sub AES

User’s Guide DMC-842 © RME17 9.4 Mode 2 In Mode 1 the digital microphone is clock master, operating from the internal and fixed fre-quency. When co

18 User’s Guide DMC-842 © RME 9.7 SRC The DMC-842 includes eight individually switchable sample rate converters (SRC). The techni-cal specificat

User’s Guide DMC-842 © RME19 10. The Setup Menu 10.1 General Some options and settings are accessed and changed very seldom. These have been colle

2 User’s Guide DMC-842 © RME Important Safety Instructions ...4 General 1 Introduction ...

20 User’s Guide DMC-842 © RME 10.4 Auto ID (Au) Default: Off Available settings: On, Off This option relates to the use of the I64 MADI Card.

User’s Guide DMC-842 © RME21 10.6 Follow Clock (FC) Default: Off Available settings: On, Off The signal at the word clock or AES input can be Sin

22 User’s Guide DMC-842 © RME 10.10 Analog Output (Ao) Default: 42 Available settings: 42, oP This option relates to the use of the I64 MADI C

User’s Guide DMC-842 © RME23 10.14 Special (SPECIAL) Gives access to 5 special functions which are steered by the SELECT keys 1 to 5. The current s

24 User’s Guide DMC-842 © RME 11.2 Low Cut (Lo-Cut) Default: Off Available settings: Off, 40, 80, 160 (display 0, 1, 2, 3) This option activat

User’s Guide DMC-842 © RME25 12. Remote Control 12.1 MIDI The DMC-842 can be completely remote controlled via MIDI. It reacts on special SysEx com

26 User’s Guide DMC-842 © RME The block diagram shows the sig-nal flow in a HDSP MADI-based remote control system. MIDI com-mands from a software

User’s Guide DMC-842 © RME27 The button Send Data allows an offline configuration of the DMC-842 by a single one-time transmission of all settings.

28 User’s Guide DMC-842 © RME 12.4 RS232 The DMC-842 is already equipped with a serial interface port. Please note that this port is with-out fu

User’s Guide DMC-842 © RME29 User’s Guide DMC-842 Inputs and Outputs

User’s Guide DMC-842 © RME3 12 Remote Control 12.1 MIDI ...25 12.2 MIDI over

30 User’s Guide DMC-842 © RME 13. Digital Inputs 13.1 XLR At the rear side of the DMC-842 there are eight XLR sockets for the AES42 inputs. All

User’s Guide DMC-842 © RME31 14. Digital Outputs 14.1 AES/EBU The four AES/EBU outputs are provided on the rear of the DMC-842 via a 25 pin D-sub

32 User’s Guide DMC-842 © RME 14.2 ADAT Optical The DMC-842 provides two digital outputs in ADAT optical format. In normal operation these port

User’s Guide DMC-842 © RME33 14.3 I64 MADI Card The I64 MADI Card provides the DMC-842 with a 64-channel MADI input and output. Coaxial and optical

34 User’s Guide DMC-842 © RME Delay Compensation has to be manually activated in each unit! 14.4 Differences serial MADI with I64 MADI Card a

User’s Guide DMC-842 © RME35 15. Analog Outputs The DMC-842 has 8 balanced XLR outputs on the back panel. The electronic output stage does not ope

36 User’s Guide DMC-842 © RME 16. Word Clock 16.1 Word Clock Input and Output SteadyClock guarantees an excellent performance in all clock mode

User’s Guide DMC-842 © RME37 16.2 Operation and Technical Background In the analog domain one can connect any device to another device, a synchroni

38 User’s Guide DMC-842 © RME 16.3 Cabling and Termination Word clock signals are usually distributed in the form of a network, split with BNC T

User’s Guide DMC-842 © RME39 User’s Guide DMC-842 Technical Reference

4 User’s Guide DMC-842 © RME Important Safety Instructions ATTENTION! Do not open chassis – risk of electric shock The unit has non-isolated

40 User’s Guide DMC-842 © RME 18. Technical Specifications 18.1 Analog DA-conversion • Resolution: 24 Bit • Signal to Noise ratio (SNR) @ +24

User’s Guide DMC-842 © RME41 18.3 Digital Outputs AES/EBU • 4 x, transformer-balanced, galvanically isolated, according to AES3-1992 • Output vol

42 User’s Guide DMC-842 © RME 18.6 General • Power supply: Internal switching PSU, 100 - 240 V AC, 60 Watts • Typical power consumption: 24 Wa

User’s Guide DMC-842 © RME43 Yamaha: Signal In 1/2+ In 1/2- In 3/4+ In 3/4- In 5/6+ In 5/6- In 7/8+ In 7/8- D-Sub 1 14 2 15 3 16 4 17 Signal Out

44 User’s Guide DMC-842 © RME 19. Technical Background 19.1 Terminology Single Speed Sample rate range originally used in Digital Audio. Typica

User’s Guide DMC-842 © RME45 19.2 Lock and SyncCheck Digital signals consist of a carrier and the data. If a digital signal is applied to an input,

46 User’s Guide DMC-842 © RME 19.3 Latency and Monitoring The term Zero Latency Monitoring has been introduced by RME in 1998 for the DIGI96 ser

User’s Guide DMC-842 © RME47 19.4 DS - Double Speed When activating the Double Speed mode the DMC-842 operates at double sample rate. The internal

48 User’s Guide DMC-842 © RME 19.6 AES/EBU - SPDIF The most important electrical properties of 'AES' and 'SPDIF' can be seen

User’s Guide DMC-842 © RME49 19.7 MADI Basics MADI, the serial Multichannel Audio Digital Interface, has been defined already in 1989 as an extensi

User’s Guide DMC-842 © RME5 User’s Guide DMC-842 General

50 User’s Guide DMC-842 © RME 19.8 SteadyClock The SteadyClock technology of the DMC-842 guarantees an excellent performance in all clock modes.

User’s Guide DMC-842 © RME51 20. Block Diagram

52 User’s Guide DMC-842 © RME 21. MIDI Implementation DMC-842 21.1 Basic SysEx Format Value Name F0h SysEx header 00h 20h 0Dh MIDITEMP manufac

User’s Guide DMC-842 © RME53 Request Microphone Data Format: F0 00 20 0D 42 (bank no. / dev ID) (40..47) F7 This string triggers a complete dump of

54 User’s Guide DMC-842 © RME 21.3 Table No. No. Name Set Val. Val. Resp. Databytes 00h 0 Ch. 1 Gain x x 0..63 = 0..+63dB

User’s Guide DMC-842 © RME55 10h Setup 1 MSB / 7 0 6 MSB / 1 Analog Output Level: 0 = +13dBu, 1 = +19dBu, 5 LSB / 0 A

56 User’s Guide DMC-842 © RME 14h Channel Lock / Sync 3 MSB / 7 0 6 (reserved) (Request only) 5 Input 6 RX AES42:

6 User’s Guide DMC-842 © RME 1. Introduction The DMC-842 is both an AES/EBU interface as well as a controller for digital microphones. The uniqu

User’s Guide DMC-842 © RME7 4. First Usage – Quick Start 4.1 Controls - Connectors - Displays The front of the DMC-842 features eight LED level me

8 User’s Guide DMC-842 © RME The rear panel of the DMC-842 has eight AES42 inputs, eight analog outputs, mains power, MIDI I/O, word clock I/O, t

User’s Guide DMC-842 © RME9 4.2 Quick Start After connection of all cables and power-on of the device, the configuration of the DMC-842 begins in t