DXD-16 Universal Clock
A PTP Grandmaster with GPS, merged with a precision Reference Generator
Front panel DXD-16
  • PTP Grandmaster
  • 4 independant Ethernet ports
  • Can synchronize to a PTP network, a GPS clock or a legacy reference
  • 6 legacy reference generators
  • 16 universal outputs (WC, AES, VID SYNC, 10MHz)
  • 2 external reference inputs with failover for redundancy
  • Remote control via web browser
  • Multiple options: GPS receiver, OCXO, SDI
The DXD series from Brainstorm is designed to ease the transition to IP. The DXD-16 Universal Clock is a PTP Grandmaster clock with GPS receiver and a multi-format legacy reference generator. While working in a PTP environment, the DXD-16 keeps legacy equipment perfectly synchronized with the IP infrastructure, or vice-versa.
IEEE 1588 network sync.
The DXD-16 can be either a PTP Grandmaster, slave or Boundary Clock. PTP (Precision Time Protocol), defined in IEEE 1588, has been broadly adopted by manufacturers as a network synchronizing standard, which means that the DXD-16 can work in a number of systems. PTP profiles supported by the DXD-16 include AES67 and SMPTE 2059.
As a Boundary Clock, the DXD-16 can be a slave to a Grandmaster on one of its attached networks, synchronize its internal clocks to that Grandmaster, and distribute the same Grandmaster time in its role as PTP master to the remaining attached networks. Alternatively it can itself fulfill the function of Grandmaster and be PTP master on all attached networks.
The DXD-16 has four Gigabit Ethernet ports (RJ45). The different ports can be used independently or as primary and secondary pairs. Each network connector supports an electrically and logically independent network, with the DXD-16 acting as a PTP timing bridge. The DXD-16 is not a network switch, and for security reasons no information flows from any network port to any other.
Customize your units with universal outputs.
The DXD-16 generates 6 independent sync pulses and clocks simultaneously and routes them to the 16 BNC universal outputs. Universal Outputs offer great flexibility compared to dedicated outputs as they can be configured for any of the generated legacy reference signals. This includes all standard SD and HD video sync formats (Black Burst and HD tri-level sync), word clock and AES-3id (at rates from 32 to 384 KHz, plus all the necessary pull-up/down, including 24:25 conversions, even VSO) and 10MHz.
Accurate and versatile clock generator.
A high-accuracy internal crystal oscillator (TCXO) provides a very stable frequency reference (+/- 1ppm). An optional oven-controlled oscillator (OCXO) can be installed. External legacy signals can also be used as reference, such as Word Clock, AES, Video Sync (SD & HD) or a 10MHz tone. The generated outputs have extremely low jitter. The output rates are independent from the reference rate which means that any rate can be extracted from any reference such as 59.97 from 25FPS for example.
An external GNSS/GPS receiver can be connected to the DXD-16 and provide the highly accurate and stable GPS clock and Time Of Day (TOD) as an external timing source. With this function multiple DXD-16’s in remote locations will be locked to each other and in phase once they are GPS referenced. Optionally, an internal GPS receiver can be installed.
Auto Fail-over
When using an external reference, a second source can be connected as fallback in case of failure. If the external reference becomes unusable, the DXD-16 continues generating, locked either to the alternate source or to the internal oscillator and re-locks to the reference when it reappears. These transitions occur smoothly and gradually with no sync shock to the system.
Battery backup
The internal time-of-day clock is battery backed-up to keep it running while power is off.
Power redundancy
An internal 100-240 VAC power supply is provided as is a DC input for an external 12VDC source. The unit can operate with either of these power sources and either can act as a back-up for the other with auto switch-over in the event of a failure.
Alarm and Remote
GPIO inputs (3) and outputs (3) are included.
All functions and settings can be monitored and altered via a web browser.
Rear panel DXD-16
PTP:4 independant Gigabit Ethernet ports (RJ-45)
Configurable as a Grandmaster, slave or Boundary clock
Complies with IEEE-1588 V2
Unicast / Multicast operation
Ext GPS Receiver: DXD-16 can operate with an external GPS receiver. Inputs are provided for:
  • 10 MHz
  • 1 PPS
  • TOD serial messages (RS 232)
Reference Generator: Generates simultaneously up to 6 different rates in any of these formats:
  • Word clock - rates from 32 to 384 KHz
  • AES - rates from 32 to 96 KHz
  • Video sync:
    • NTSC/PAL black burst
      • 525/29.97/30i
      • 625/23.98/24/25i
    • HD tri-level sync
      • 720/23.98/24/25/29.97/30/50/59.94/60P
      • 1080/25/29.97/30i
      • 1080/23.98/24/25/29.97/30sF
      • 1080/23.98/24/25/29.97/30/50/59.94/60p
  • 10MHz
Universal Outputs:16 outputs - in 6 different groups
BNC - 75Ω
Output signal: any of the generated legacy references
Oscillators:TCXO: +/- 1ppm
OCXO: +/-10ppb (option)
External Sync Sources:Word clock
Video sync (Black Burst or HD tri-level sync)
Universal Inputs: 2 BNC input connectors w/ 75Ω termination switch
Accepts the following input signals:
  • Word clock
  • AES
  • Video sync (Black Burst or HD tri-level sync)
  • 10 MHz
Remote control:Web browser
3 GPIO inputs (DB-25)
Alarm:3 GPIO outputs (DB-25)
Battery backup:An on-board battery keeps the internal time-of-day clock running while power is off
Presets:10 presets can be programmed for quick recall
Display:2.4” TFT LCD - 240 x 320 resolution
Power:AC: 100-240 VAC - Internal power supply with IEC inlet
DC: 12 VDC @ 60A - 4 pin circular input connector for external DC power source
Dual power sources with auto switch-over in case of failure for redundancy
Dimensions:19” x 1.75” x 8”
GNSS/GPS Internal
Receiver (option):
The DXD-16 can be fitted with an Internal GNSS/GPS receiver.
The option includes an SMA antenna input connector. An antenna is required (not included).
SDI Input (option):Option card with SDI Input and Loop BNC connectors (50Ω)
Allows the DXD-16 to lock to external SDI signal

Manual & Data Sheet
Owners Manual - DXD-16 rev. 106Download
DXD-16 Data SheetDownload
1. How many different sync signals can the DXD-16 generate simultaneously?
The DXD-16 can generate up to 6 different sync signals similtaneously in any combination of WC, AES, Video Sync or 10MHz. These sync signals are then sent to the 16 universal outputs.
2. Can the DXD-16 be set up to have 16 video sync outputs, 1080p tri-level sync for example?
Yes, the Universal Outputs can be set to any of the formats mentioned in FAQ #1 above, which means that, if 16 outputs of 1080p tri-level sync is what is needed, the DXD-16 can be set up to do just that.
3. Are the 4 DXD-16 Ethernet ports identical?
Each network connector supports an electrically and logically independent network. From a PTP standpoint, the 4 ports are identical but firmware updates and remote control are from port #4 only.