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Apogee BIG BEN User Manual

192k master digital clock.
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192k Master Digital Clock
User's Guide
v1.0 - June 2003

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Table of Contents

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   Summary of Contents for Apogee BIG BEN

  • Page 1 192k Master Digital Clock User’s Guide v1.0 - June 2003...
  • Page 3 192k Master Digital Clock User’s Guide v1.0 - June 2003...
  • Page 4 Copyright Notice The Apogee BIG BEN is a computer-based device, and as such contains and uses software in ROMs. This software, and all related documentation, including this User’s Guide contain proprietary informa- tion which is protected by copyright laws.
  • Page 5: Service Information

    Apogee. In the event your BIG BEN needs to be upgraded or repaired, it is necessary to contact Apogee prior to shipping, and a Return Materials Authorization (RMA) number will be assigned. This number will serve as a reference for you and helps facilitate and expedite the return process.
  • Page 6 • 73/23/EEC – Low Voltage Directive • 89/336/EEC – EMC Directive Declaration of Conformity – Japan Apogee Electronics Corporation hereby declares that the BIG BEN, to which this declaration relates, is in material conformity with the VCCI Class A standard. Declaration of Conformity – Australia Apogee Electronics Corporation hereby declares that the BIG BEN is in material conformity with AN/NZS standard requirements.
  • Page 7 The serial number is located on the rear panel of the unit. We suggest you record the serial number in the space provided below. Refer to it whenever you call an authorized Apogee Electronics repair facility or the manufacturer. Please be sure to return your com- pleted warranty card immediately! BIG BEN Serial No.
  • Page 9: Table Of Contents

    User’s Guide Table of Contents Introduction ......................2 Getting Started Quickly ................3 ..................3 Connecting Power ......................3 Reset ....................3 QuickStart Navigating the Front Panel ..............4-9 ....................4 Power Switch .......................4 Set-Up ....................5 Clock Source .....................6 Sample Rate ..................6 Lock indication .......................7 Optical ......................7 .................8 Pull Up/Down (VSO) ....................8...
  • Page 10: Introduction

    • At the heart of Big Ben, Apogee’s C777 Clock Technology uses Direct Digital Synthesis to generate ultra-stable clock frequencies whose jitter is virtually un-measurable regardless of the clock source. Big Ben operates at frequencies up to 192 kHz, including common pull up/ pull down frequencies and VSO (varispeed) functionality.
  • Page 11: Getting Started Quickly

    • Modify the selected parameter to the desired value by press- of operation. ing either the UP or DOWN button. Again, scroll through the The musical note indicates available values. in-depth explanations. • If no buttons are pushed for 2 seconds, Setup mode is auto- matically disabled. APOGEE ELECTRONICS...
  • Page 12: Navigating The Front Panel

    4) If no buttons are pushed for 2 seconds, Setup mode is disabled automatically, and the value which was blinking will now illumi- nate solidly. All settings (except some VSO settings) are saved in non-volatile memory, and will be recalled the next time Big Ben is powered up. APOGEE ELECTRONICS...
  • Page 13: Clock Source

    • VIDEO - clock outputs are derived from the Video/Word Clock input when a valid video signal has been connected. The video format (PAL,NTSC or B&W) will be automatically detected. APOGEE ELECTRONICS...
  • Page 14: Sample Rate

    � � ����� ���������� � � � � ��� ����� � FIGURE 2 Note that Apogee’s use of Wide and Narrow terminology differs from that of other manufacturers, who use “narrow” to designate a clock reference running precisely at standard rates, and “wide”...
  • Page 15: Optical

    Valid settings of the OPTICAL and AES parameters are determined by the SAMPLE RATE as depicted in FIGURE 3 below; 192/176.4 96/88.2 48/44.1 S/PDIF valid valid valid ADAT valid S/MUX 2 valid S/MUX 4 valid AES Single valid valid valid AES Double valid valid FIGURE 3 APOGEE ELECTRONICS...
  • Page 16: Pull Up/down (vso)

    WC Out 5 & 6 may be set accordingly. 9) WC OUT 5 – This parameter allows the frequency of Word Clock Output 5 to be set to a multiple of the SAMPLE RATE. APOGEE ELECTRONICS...
  • Page 17: Wc Out 6

    Three states of termination are indicated for each word clock output: • Red LED on – Input is OVER terminated • Green LED on – Input is correctly terminated • No LED on – Input is un-terminated or output is not connected APOGEE ELECTRONICS...
  • Page 18: Connections On The Rear Panel

    & 6 may be set to transmit a clock whose frequency is a multiple of the SAMPLE RATE. 8) AC IN – This IES connection accepts an AC input of 100 to 240 VAC at a frequency of 50 to 60 Hz. APOGEE ELECTRONICS...
  • Page 19: About Digital Audio Formats And Format Conversion

    S/PDIF connector). About SureLock Thanks to SureLock, Apogee’s intelligent clock continuity algorithm, even the loss of the input reference will not degrade the stability of Big Ben’s outputs. When the selected CLOCK SOURCE is no longer applied to Big Ben, the unit will continue to generate clock outputs at the last known valid frequency;...
  • Page 20: Internal Adjustments

    For those who get nervous when machines silently take over. Defeat FC (Format Conversion) – Jumper 18 When a jumper is installed across P18 and Big Ben is power cycled, Format Conversion functionality is defeated and Digital “Black” is sent to all digital audio outputs. FIGURE 7 APOGEE ELECTRONICS...
  • Page 21: Clock Distribution Theory And Practice

    ((a load impedance greater than 75 ohms) introduces overshoot and other waveform distortions. Both conditions compromise clock accuracy, and are indicated by Big Ben’s termination sensing LEDs. (continued on p.14) APOGEE ELECTRONICS...
  • Page 22 BNC “T” connector on the word clock input. 4) Don’t delay the clock signal to any device by chaining a signal through input/output clock circuitry. Every device should receive the digital “downbeat” simultaneously. APOGEE ELECTRONICS...
  • Page 23: Features And Specifications

    • 6 x BNC Word Clock 44.1-192k (of which 2 can output x256fs, x4, x2, 1/2, 1/4 at apropriate sample rates) • ADAT • SMUX II • SMUX IV • Optional FireWire Due to on-going development Apogee reserves the right to change all information and specifications without notice. APOGEE ELECTRONICS...
  • Page 24 BIG BEN USER’S GUIDE - v.1.0 - June 2003 Text conceived and delivered by: Roger Robindore Graphics and product illustration by: Sean McArthur...

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