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DXD/PTP/GPS User Manual (rev 2.10) 

1. Introduction 

PTP for the DXD-8

: The DXD-8 Universal Clock is designed to be the central source of time in a modern A/V installation. As 

a master clock generator it provides WC, AES and Video Sync. But with the addition of PTP, the DXD-8 truly becomes universal 
by keeping traditional audio/video equipment and IP networks in perfect sync. 

The DXD-8 has the capability of being a PTP Grandmaster or a PTP slave. As a PTP master, the DXD-8 can lock to external sync 
sources such as WC, AES, Video Sync and 10 MHz, or to its internal crystal, while generating PTP sync. As a PTP slave, it can 
lock to a Grandmaster while generating traditional sync signals (word clock, AES, video sync or 10MHz). 

GPS and OCXO

 give the DXD line access to more stable time sources and gives the DXD’s a higher priority to become PTP 

Grandmaster. GPS also allows remote units to be in perfect sync. 

2. Installation 

2.1 DXD/PTP INSTALLATION (FIRMWARE) - DXD-8 ONLY 

Before installing the DXD/PTP, be sure to update your DXD-8 with the latest firmware, available on the Brainstorm website. 

When you purchased your DXD/PTP, you received a unique authorization key, a series of 4 numbers, separated by periods. 
This key is only valid for the DXD-8 with the serial number used when you placed the order. Note that PTP is optional on the 
DXD-8 only. A feature key is not required on the DXD-16. 

Enter this key in Menu 9.5, FEATURE KEYS, under the main menu 9.0 UTILITY. After entering the authorization key, you will be 
prompted to confirm your entry. A message will confirm that the feature key has been set. 

This authorization procedure only needs to happen once, even with subsequent firmware updates. 

2.2 DXD/GPS & DXD/OCXO  INSTALLATION (HARDWARE) 

For instructions on how to install the GPS receiver and the OCXO oscillator, see Appendix A & B. No authorization code is 
required for either of these 2 options. New menus and displays will become available after hardware installation. 

IEEE-1588

ETHERNET

PTP

INT

OCXO

ANT

GPS

ETHERNET

UNIVERSAL OUTPUTS

1
2

BNC OUT 1 & 2

BNC OUT 3 & 4

BNC OUT 5 & 6

BNC OUT 7 & 8

5
6

7
8

SYNC

SYNC

SYNC

SYNC

3
4

• WC
• AES

• VID

• 10 MHz
• 1PPS

• WC
• AES

• VID

• 10 MHz
• 1PPS

• WC
• AES

• VID

• 10 MHz
• 1PPS

• WC
• AES

• VID

• 10 MHz
• 1PPS

SYNC

TIME SOURCES

(POSITION)

INT

TCXO

REFERENCE SOURCES

(RATE)

SYNC

TIME

SELECT

REFERENCE

SELECT

ETHERNET

BNC IN B

WC

AES

VID

10MHz

BNC IN A

WC

AES

VID

10MHz

NTP

INTERNAL

TIME OF DAY

CLOCK

&

REFERENCE

FRAME

GENERATOR

DXD-8 DIAGRAM

INT

RTC

ETHERNET

PTP

(

BMCA

)

ANT

GPS

PTP

(

BMCA

)

Rate & Position

Rate Only

Position Only

Содержание DXD/GPS

Страница 1: ...k DXD OCXO OCXO option for the DXD Universal Clock Operations manual Version 2 10 January 2021 All materials herein Brainstorm Electronics Inc Brainstorm Electronics reserves the right to change or mo...

Страница 2: ...6 GPS Menus 8 6 1 SATELLITES SELECTION MENU 6 1 8 6 2 GPS SETTINGS MENU 6 2 8 6 3 ADVANCED GPS SETTINGS MENU 6 3 8 7 DXD OCXO 9 8 Time of Day 9 8 1 RTC Real Time Clock 10 8 2 Time Jam 10 8 2 1 TIME JA...

Страница 3: ...9 15 Typical PTP use 20 15 1 HYBRID SYNC GENERATOR ACCEPTING MULTIPLE REFERENCES 20 15 2 DISTRIBUTED PTP VS INDIVIDUAL GRANDMASTERS WITH GNSS 21 16 Guidelines for con fi guring PTP Precision Time Prot...

Страница 4: ...a series of 4 numbers separated by periods This key is only valid for the DXD 8 with the serial number used when you placed the order Note that PTP is optional on the DXD 8 only A feature key is not r...

Страница 5: ...ng LOCAL REF WHEN GM When PTP Mode is selected if GPS is available this fields enables GPS to be set as the reference when the DXD 8 is the Grandmaster Enabling this field will announce the DXD 8 as G...

Страница 6: ...a quick set up This menu gives you the option to set the timing values to the pro fi le default values 4 4 PORT TIMING MENU 5 4 Announce Interval 3 to 4 1 8sec 16sec Sets the rate at which the master...

Страница 7: ...in your DXD an antenna will need to be connected to the receiver s SMA connector an antenna is not included with the DXD GPS The cable needs an SMA Male connector on the DXD side Ideally the antenna s...

Страница 8: ...sideration as it can not only impact the signal strength but also cause a delay in the signal Under typical conditions however the expected cable delay is negligible in the nanoseconds range The follo...

Страница 9: ...e reference sources include time and rate information GPS and PTP for example carry precise time and date information as well as frequency However traditional reference signals such as video sync or w...

Страница 10: ...nd wanting all of the cross frame outputs 25 etc to be in correct phase and epoch as well as wordclocks and AES In a primarily legacy application this is the way to increase the number of legacy outpu...

Страница 11: ...to use Local Time instead while others may even prefer different standards for different times Be aware that even though the time source may give Time Of Day it may not correspond to the time indicate...

Страница 12: ...on Jan 1 1970 This process occurs everyday at the same time as set in the DAILY JAM TIME fi eld Daily Jam Time The value entered in the DAILY JAM TIME field is the amount of time after midnight local...

Страница 13: ...to LOCKED GRANDMASTER In case the DXD is or becomes a PTP Salve when locked it changes to LOCKED PTP SLAVE Note that if another source was selected in the reference menu such as Video Sync and the DXD...

Страница 14: ...lock and the Grandmaster in sec Additional times may appear on this page such as Time Code based on the installed options 11 2 2 GPS RECEIVER STATUS PAGE The GPS RECEIVER status page displays the foll...

Страница 15: ...as the ability to clock to a non Dante PTP v2 clock AVB Audio Video Bridging is a set of IEEE standards that facilitate the transport of high performance audio and video on a LAN One of those standard...

Страница 16: ...suited clock is found it will become the Grandmaster 12 6 SYNCHRONIZATION There are several different PTP messages used during synchronization sequenced as follows 1 The grandmaster sends a Sync messa...

Страница 17: ...clocks on a single PTP communication path must use the same method to measure the time delay 12 8 TYPES OF CLOCKS IEEE 1588 de fi nes three different types of clocks Ordinary Clock OC Boundary Clock...

Страница 18: ...ate of the port can change The BMCA determines what unit becomes the Grandmaster If the current Grandmaster disappears or looses GPS another Grandmaster is selected For more on the Grandmaster selecti...

Страница 19: ...it has been set by the operator 14 1 JUMP TO RELOCK When the time difference detected between the external PTP GM and the DXD System Time is above the Jump Threshold value the DXD will jump to the ne...

Страница 20: ...t all equipment could be kept perfectly synchronized But for added fl exibility the DXD s can also be set up to lock to any legacy sync or to PTP as illustrated below These choices are available in th...

Страница 21: ...TP slaves to an external Grandmaster in the second illustration the DXD 8 s are all Grandmaster for their networks and each is locked to GNSS This second solution is particularly useful when distances...

Страница 22: ...ith any other domain number will be ignored menu 5 2 Ports Timing per IEEE 1588 all devices on a PTP domain must have the same value set for these ports timing Announce Interval Announce Receipt Timeo...

Страница 23: ...GMPv2 On larger networks a router is required to manage multicast group membership Switches that support IGMP snooping are also recommended 17 Troubleshooting Error Warning Messages 17 1 PTP NO PORT W...

Страница 24: ...3 Menu 5 1 If PTP was selected TIME JAM BNC INPUT will automatically show in menu 5 1 in blue blue status information The words Time Jam will also appear on the REFERENCE line at the bottom of the ma...

Страница 25: ...the ribbon cable to J23 the GPS connector on the motherboard B J23 is the designator number on both DXD 8 and DXD 16 PCB As always with ribbon cables make sure the connectors are properly oriented do...

Страница 26: ...Including cable loss Low Gain mode FLNA High 3 For best jammer resistance and lower power consumption use 10 dB lower gain than the max gain 18 3 2 RECOMMENDED PASSIVE ANTENNA 1 High Gain mode FLNA Op...

Страница 27: ...TIMEOUT 3 announce intervals SYNC INTERVAL 1 sec log 0 MINIMUM DELAY REQUEST INTERVAL 1 sync interval GLONASS Yes GALLILEO No QZSS LIC A Yes SBAS QZSS LIS SBAS DIF FIX ANTENNA CABLE DELAY 0 ANTENNA H...

Страница 28: ...Page 28 DXD PTP GPS User Manual rev 2 10...

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