Sonifex AVN-GMCOS PTP Grandmaster Clock GPS IP TXCO - Rackmount

ITEM #: SON-AVN-GMCOS MFG #: AVN-GMCOS

Primary Image
  • Product Image Thumbnail 1 of 2
  • Product Image Thumbnail 2 of 2
Free Shipping with $49 Minimum Order

Our Price:

$3,124.16

Availability: Typically Ships in 3-10 Business Days
iAvailability Description Popup


    AVN-GMCOS - Overview

    The AVN-GMCS is a PTPv2 grandmaster clock for use with AoIP applications. IEEE1588-2008 PTPv2 (precision time protocol) is used to synchronise all the nodes within a network. To achieve this one of the nodes must become the master clock and distribute time packets to the others. The AVN-GMCS is designed to perform this role simply and accurately, enabling sub micro second synchronisation between all nodes.

    RAVENNA (of which AES67 is a subset) allows for the distribution of audio across a network. For this to be possible, each of the nodes needs to be time synchronised with one another. RAVENNA uses PTP time stamping to achieve this, which distributes the network time but also works out the latency involved in the delivery and adjusts the time at each node accordingly.

    Unit configuration is achieved easily either with the front panel controls or the webserver, including the setup of the PTP profiles. The AVN-GMCS supports the Default (RAVENNA), Media (AES67) and AES-R16-2016 (SMPTE-ST 2059-2 & AES67 compatible) profiles and has a "Custom" profile page for you to define your own.

    In normal operation, the unit has PTPv2 time stamping resolution to 8nsec. It uses a combination of a GPS receiver, a PLL (phase lock loop) and a specialist on-board clock device to create the precise, low jitter clock signals required to drive the physical transceiver's time stamping circuitry, also providing holdover if the GPS signal is lost.

    The specialist on board clock is available in two different types: TCXO & OXCO, which vary in both price and accuracy:
    AVN-GMCS - TCXO Temperature Compensated Oscillator accurate to 1 part per million (worst case 1 sec gain/loss every 11.5 days).
    AVN-GMCOS - OCXO Oven Controlled Oscillator accurate to 0.1 parts per million (worst case 1 sec gain/loss every 115 days).

    GPS presence and the number of satellites received is shown on the front panel, together with status information on output sample rates, sync type and profile type. The unit also has a screen-saver option which shows the current time.
    Although designed as a grandmaster clock, a separate clock input can act as an alternative reference source to GPS which the unit can 'slave' to. Clock outputs, driven from the physical transceiver, can be used to provide media clocks for external equipment local to the AVN-GMC when it is in both 'master' and 'slave' states.

    The clock outputs are available as a single AES-3id output and two outputs which can be selected as either word clock or variable PPS. The wordclock can operate at 32, 44.1, 48, 96, 176.4 and 192kHz. When set as a variable PPS output, the unit can act as a clock master to distribute a reference frequency to test and measurement equipment.

    The unit shows UTC as standard, but can be set to show 'local time' on the front panel, by adding a time offset. Daylight saving time changes can be accommodated by entering Spring Forward and Fall Back dates. It has a real time clock so that accurate date and time is available even after the unit is repowered without GPS access.

    The built-in webserver, or front panel OLED display, can be used to configure the unit. The webserver is a responsive design meaning that it can be used with small screens on smartphones and tablets.

    Front panel LEDs show the synchronization status, GPS lock and the status of the AC and DC power supply inputs.
    The brightness of the OLED display and LED indicators can be adjusted for low or high lighting conditions
    4 general purpose outputs indicate critical states for the unit using a 9 way D-type connector mounted on the rear panel. Pull down when active pins are supplied for GPS lock status, external sync present, AC power present and DC power present.

    • Features:

      • AES67/RAVENNA/AES-R16 compatible
      • GPS satellites received indicator
      • Master and slave sync modes
      • 8ns PTPv2 time stamping resolution
      • Holdover drift <1ppm, with options for <0.01ppm & <0.0005ppm
      • AES-3id, wordclock & variable PPS outputs
      • Analogue master input
      • Dual power supply inputs
      • Front panel display
      • GPS sync and power supply present LED indicators
      • Real time clock for accurate date/time
      • Responsive design Ethernet webserver and front panel control & configuration
       
    • Specifications:

      • Timing
      • Profile Support: Default (RAVENNA), Media (AES67), AES-R16-2016 (SMPTE-ST 2059-2 & AES67 compatible), Custom profile
      • Timing Protocol: PTPv2, IEEE1588-2008
      • Timing Accuracy: PTP time stamping resolution 8ns
      • Holdover Drift: TCXO: <90ms; OCXO: <900µs; CSAC: <45µs
      • GPS Performance: 50 channel GPS receiver
      • GPS Frequency: 1575.42MHz, L1 band

        Clock
      • Input Impedance: 75Ω
      • Output Impedance: <75Ω
      • Antenna Impedance: 50Ω

        Connections
      • Clocking Input: BNC female
      • Clocking Outputs: 3 x BNC female Wordclock, AES-3id @ 32, 44.1, 48, 96, 176.4 & 192kHz Variable PPS (1, 10, 100, 1000) TTL
      • GPS Input: SMA socket
      • GPIO: D-Type female 9 way
      • Ethernet Port: RJ45 socket, 100 BASE-T
      • Mains AC Input: Universal filtered IEC socket, continuously rated 85-264 VAC @47-63Hz, max 10W
      • DC Input: Maximum Operating Range (DC): 1 x 12V, KPJX-45 socket, positive pins 1 and 3; 10.3V to 13.2V DC

        Equipment Type
      • AVN-GMCS: Grandmaster clock for PTP systems, GPS, IP, TCXO, 1ppm, rackmount
      • AVN-GMCOS: Grandmaster clock for PTP systems, GPS, IP, OCXO, 0.01ppm, rackmount
      • AVN-GMCCS: Grandmaster clock for PTP systems,GPS, IP, CSAC, 0.0005ppm rackmount

        Physical Specification
      • Dimensions (H x W x D): 1.8" x 19" x 7" (1U)
      • Shipping Dimensions (H x W x D): 2.7" x 23" x 10.6"
      • Weight: 3.2lbs
      • Shipping Weight: 4.8lbs
       

    AVN-GMCOS - Required Accessories

      California Residents:
      WARNING:
      Cancer and Reproductive Harm - www.P65Warnings.ca.gov