Brainstorm Electronics DXD-16 Operation Manual
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Brainstorm Electronics DXD-16 Operation Manual

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DXD-16
Universal Clock
Operations manual
Version 2.0
June 2020
All materials herein © Brainstorm Electronics, Inc.
Brainstorm Electronics reserves the right to change or modify the contents of this manual at any time.
Brainstorm Electronics, Inc.
www.brainstormtime.com

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Summary of Contents for Brainstorm Electronics DXD-16

  • Page 1 DXD-16 Universal Clock Operations manual Version 2.0 June 2020 All materials herein © Brainstorm Electronics, Inc. Brainstorm Electronics reserves the right to change or modify the contents of this manual at any time. Brainstorm Electronics, Inc. www.brainstormtime.com...

  • Page 2: Table Of Contents

    Page 2 DXD-16 User Manual (rev 2.00) Table of Content 1. Introduction ..........................2. Installation ..........................2.1 UNPACKING ....................2.2 INSTALLING THE DXD-16 ................3. Quick Start ..........................4. I/O’s Description and Cable Requirements ................. 4.1 AC POWER ....................4.2 ANTENNA (OPTION) ..................
  • Page 3 DXD-16 User Manual (rev 2.00) Page 3 7.3.1 BNC OUTPUTS 1-4 (MENU 3.1) ..............7.3.2 BNC OUTPUTS 5-8 (MENU 3.2) ..............7.3.3 BNC OUTPUTS 9&10 MENU (3.3) ............. 7.3.4 BNC OUTPUTS 11&12 (MENU 3.4) ............7.3.5 BNC OUTPUTS 13&14 (MENU 3.5) ............
  • Page 4 Page 4 DXD-16 User Manual (rev 2.00) 8. RTC (Real Time Clock) ......................9. Lock Status ..........................10. PTP Port States ........................11. PTP Set Ups ........................... 11.1 BOUNDARY CLOCK ................... 11.2 4-MASTER PORTS ON A SINGLE DOMAIN WITH GPS REFERENCE ....
  • Page 5 DXD-16 User Manual (rev 2.00) Page 5 19.7 DELAY MEASUREMENT MECHANISM ............19.8 TYPES OF CLOCKS ..................19.9 PTP DOMAINS ................... 19.10 PTP PROFILES ................... 19.11 EPOCH ..................... 20. Notes on PTP (Precision Time Protocol) ................... 21. Appendix ..........................21.1 APPENDIX A: VIDEO INPUT FORMATS ............

  • Page 6: Introduction

    • As a PTP slave, the DXD-16 can generate legacy sync so that the legacy equipment locks to the network. • As a PTP master, the DXD-16 can lock to external sync sources such as WC, AES or video sync so that the network locks to the legacy equipment.

  • Page 7: Installation

    Out of the box, the DXD-16 is set to generate NTSC video sync, referenced to its internal crystal. This signal is sent to all 16 outputs. The 4 PTP ports are in the DISABLED mode. DHCP is activated on each port so IP addresses will be provided automatically.

  • Page 8: I/O's Description And Cable Requirements

    4.5 ETHERNET PORTS 4 independent Gb Ethernet ports used to connect the DXD-16 to a network for PTP sync or to control the unit remotely and upload firmware from any computer on the network. Remote control and firmware update is from port #4 only.

  • Page 9: Front Panel Display & Led's

    5.1 FRONT PANEL DISPLAY The DXD-16 front panel has a large full color display giving access to all the unit’s parameters and settings. In the normal operating mode, information is presented on the display in multiple pages referred to as the ‘Main Rotation’...

  • Page 10: Display

    Page 10 DXD-16 User Manual (rev 2.00) 6. Display 6.1 Main Rotation In the standard operating mode, with neither the Status mode nor the Set Up mode activated, information is presented on the display in multiple pages referred to as the ‘Main Rotation’.

  • Page 11: Status Mode

    DXD-16 User Manual (rev 2.00) Page 11 • TIME & DATE This page displays up to two different times & dates as set in menu 7.3. The names of the DXD times selected in menu 7.3 appear in the left column while the name of the standards selected in menu 7.1 appear in...

  • Page 12: Set Up Mode

    Page 12 DXD-16 User Manual (rev 2.00) 6.3 Set Up Mode In Set Up mode, all parameters are accessible and can be changed by the user via the front panel. To enter the Set Up mode, press the [ ] button. The Set Up LED lights up. To exit the Set Up mode, press the [...

  • Page 13: Menu Groups

    DXD-16 User Manual (rev 2.00) Page 13 6.3.5 MENU GROUPS In the current firmware revision, menus are organized in 9 separate groups: • 1. REFERENCE & SYNC • 1.1 Reference • 1.2 Sync Parameters • 2. BNC INPUTS • 2.1 BNC Input A Set Up •...

  • Page 14: Menus Description

    • BNC INPUTS A and B are defined in menus 2.1 and 2.2 • PTP Mode is a little different. It is required for the DXD-16 to be a PTP slave, i.e. ‘referenced’ to a PTP Grandmaster. However, selecting PTP Mode means that the DXD-16 ports set to ‘Master/Slave Group’ will participate in the PTP Grandmaster selection and will either be a PTP Slave or the Grandmaster based on the outcome of the BMCA (see 19.5).

  • Page 15: Sync Parameters (Menu 1.2)

    (see chapter 13 for more information on Alternate Reference). 7.3 BNC Outputs The DXD-16 generates 6 different reference signals simultaneously, each of them sent to a different group of BNC outputs, as described below. Each of these universal output groups can output WC, AES, Video Sync or 10MHz.

  • Page 16: Bnc Outputs 5-8 (Menu 3.2)

    • SET/AUTO: SET is the default value; AUTO is a special function, available only when the input reference is an audio signal. With AUTO, the DXD-16 automatically determines the incoming rate and uses that as the base rate. The advantage is that, if the rate of the input reference changes, so does the generated output, automatically.

  • Page 17: Network

    DXD-16 User Manual (rev 2.00) Page 17 7.4 Network The Network menu has 4 identical and separate sub-menus, one for each of the DXD-16 ports. 7.4.1 NET 1 (MENU 4.1) • 7.4.1.1 NET 1 IP ADDRESS (MENU 4.1.1) Menu 4.1.1 includes fields for DHCP, IP Address, Subnet Mask and Gateway.

  • Page 18: Ptp

    Disabled The ‘Master/Slave group’ setting is typically used to set the DXD-16 as a boundary clock where one port would be slave to an external grandmaster and the others masters to what is ’downstream’, i.e. what is connected to that port (see first diagram in chapter 11).

  • Page 19: Port 1 Timing (Menu 5.3.2)

    DXD-16 User Manual (rev 2.00) Page 19 Delay Mechanism: E2E / P2P / Disabled Two delay modes are available: End-to-End and Peer-to-Peer. In End-to-End mode, the sync, follow up, delay request and delay response messages go through the network all the way between the master and slave.

  • Page 20: Time

    Page 20 DXD-16 User Manual (rev 2.00) 7.7 Time 7.7.1 TIME STANDARDS (MENU 7.1) Four different time standards are available as well as local time: • TAI: International Atomic Time, an atomic coordinated time that has been measuring time continuously since 1955 with no leap seconds.

  • Page 21: Time & Date Display (Menu 7.3)

    7.9 GPIO The DXD-16 has 3 GPIO inputs and 4 outputs. They are accessible via the rear panel DB-25 connector (see Appendix E). GPIO Inputs and Outputs are both active low. Menus 9.1 and 9.2 let you select a function for each of these I/O’s.

  • Page 22: Presets

    Page 22 DXD-16 User Manual (rev 2.00) 7.10 Presets Ten different user settings configurations can be stored for quick recall. The 10 memory locations are labeled Preset 1 through Preset 10. Menu 10 manages the presets. After selecting a preset, there are 5 different actions to chose from:...

  • Page 23: Lock Status

    If the DXD-16 is selected, one of the other 3 options will be displayed. The bottom line has the usual LOCK status, but in the case where the DXD-16 is the grandmaster (and is locked) it changes to "LOCKED / GRANDMASTER”.

  • Page 24: Ptp Port States

    10. PTP Port States As described in 6.1, the DXD-16 indicates the state of each port in the main rotation display (PTP Ports page). The choices are: • SLAVE: used in a Boundary Clock scenario (M/S Group mode) for the slave port •...

  • Page 25: 4-Master Ports On A Single Domain With Gps Reference

    DXD-16 User Manual (rev 2.00) Page 25 In this example, Segments 1,2 & 3 do not communicate with the Grandmaster but rather with the DXD-16 ports 1, 2 & 3. ‣ The PTP PORTS Main Rotation display will show the states of SLAVE and MASTER (see 6.1.2).

  • Page 26: Hybrid Sync Generator Accepting Multiple References

    In this example, ‘PTP Mode’ is the selected reference (menu 1.1) and ports 1, 2 & 3 are set to ‘Master/Slave group’ (menu 5.1) so the DXD-16 acts as a Boundary Clock. The networks connected to ports 1 & 2 (Master ports) are the primary and a secondary, the latter being used for redundancy.

  • Page 27: Distributed Ptp Vs. Individual Grandmasters With Gnss

    11.6 DISTRIBUTED PTP VS. INDIVIDUAL GRANDMASTERS WITH GNSS In this scenario, DXD-16’s are installed in several studios. In order to keep them in sync, 2 different options are available: the first illustration shows distributed PTP where all the DXD-16’s are PTP slaves to an external Grandmaster; in the second illustration, the DXD-16’s are all Grandmaster for their networks and each is locked to GNSS.

  • Page 28: About Using The 'Set' Mode For The Reference Source

    When choosing SET for the rate of the reference source, there is the possibility that the selected rate will not match the measured rate (actual rate). If that is the case, the DXD-16 will still lock to the reference but the output frequencies will be adjusted proportionately.

  • Page 29: Reference Failure With No Alternate Reference

    Firmware updates and remote control are done via Ethernet. from port #4 only. Connect port # 4 of your DXD-16 to your network and point your browser to the IP address of your DXD-16 port 4. A simple firmware loader page will appear.

  • Page 30: Programming Sequence

    14.4 UPLOADER The Uploader is a fall-back web page that allows you to restore your DXD-16 in case of a catastrophic programming failure. This page is located in a different area of the Flash Memory, unaltered by regular firmware updates. These failures are very rare and should not happen.

  • Page 31: Gpio / Ltc Connector (Db-25)

    18. Power Two different power sources can be connected to the DXD-16: (A) 100-240 VAC and (B) 12 VDC. Either one can be used to power the unit. Two front panel LED’s indicate if power is connected to the corresponding connector, A or B.

  • Page 32: Ptp (Precision Time Protocol)

    Page 32 DXD-16 User Manual (rev 2.00) 19. PTP (Precision Time Protocol) PTP is defined in the IEEE 1588 standard. This chapter covers some general information on PTP. For more details, please refer to the IEEE publication. 19.1 TIME AND PHASE Precise time information has always been crucial in traditional production and broadcast environments.

  • Page 33: Selecting A Grandmaster

    DXD-16 User Manual (rev 2.00) Page 33 19.5 SELECTING A GRANDMASTER An algorithm called the BMCA (Best Master Clock Algorithm) is used to determine which clock will be used as the PTP Grandmaster. As defined in the IEEE 1588 standard, this selection is done autonomously based on the following criteria and in...

  • Page 34: Delay Measurement Mechanism

    • A Transparent Clock passes the PTP messages but adds the time it takes to go through itself (residence-time) in a correction field, making it ‘transparent’. The DXD-16 has 4 separate ports. Each can be set as an Ordinary Clock (independent Master-Only) or as part of a Boundary Clock (menu 5.1).

  • Page 35: Epoch

    A/V over IP, requiring a new set of skills. Although configuring an A/V network includes many settings that do not concern the DXD-16 (latency, buffers, sample rate…) PTP is a complex standard and a good understanding of network technology is required. The best source of information for PTP is the IEEE 1588 standard itself available here: https://standards.ieee.org/standard/1588-2019.html.

  • Page 36: Appendix

    ”PAL-” stands for slow PAL. 21.2 APPENDIX B: AUDIO BASE RATES The DXD-16 has 2 different audio base rates, defined in menus 3.7 and 3.8. Those are used to generate the audio signals, WC and AES. The table below shows the different rates available, based on 3 different sampling frequencies: 32KHz, 44.1KHz and 48KHz.

  • Page 37: Appendix D: Multiplier Rates

    Page 37 21.4 APPENDIX D: MULTIPLIER RATES With the 2 base rates properly set, multiples of those can be generated. Below is a table showing the different audio rates that can be generated by the DXD-16. Coefficient Base Rate 32000 none 32,000.000 Hz...
  • Page 38 Page 38 DXD-16 User Manual (rev 2.00) The first 3 General Purpose Outputs (GPO) are open-drain outputs pulled up internally to 5VDC. GENERAL PURPOSE OUTPUTS 1~3 Component Numbers for Outputs 1, 2, 3: +5.0V R_pullup: R727, R728, R729 R_series: R730, R732, R734...

  • Page 39: Appendix G: Factory Presets

    DXD-16 User Manual (rev 2.00) Page 39 21.6 APPENDIX G: FACTORY PRESETS The following are the factory default settings. REFERENCE NETWORKS 1-4 Internal Source DHCP SYNC PARAMETERS 30 ms Jump Threshold PORT MODES 1/2/3/4 BOUNDARY CLOCK DOMAIN BNC INPUT SET UP A&B...
  • Page 40 Page 40 DXD-16 User Manual (rev 2.00)

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