Download
Share
Print this page
Tektronix SPG8000A Operation Instructions Manual
  1. Manuals
  2. Brands
  3. Tektronix Manuals
  4. Inverter
  5. SPG8000A
  6. Operation instructions manual
Tektronix SPG8000A Operation Instructions Manual

Tektronix SPG8000A Operation Instructions Manual

Option ptp
Hide thumbs Also See for SPG8000A:

Advertisement

Quick Links

Download this manual See also: Instruction Manual, User Manual
SPG8000A Option PTP operation instructions
How to configure Option PTP on the SPG8000A
General information
www.tek.com
Copyright © Tektronix
*P061441700*
061-4417-00
This document describes how to configure the SPG8000A to operate in your PTP
network and also provides information about the basics of PTP operation. A list
of known bugs and operational limitations are included.
The operation of the instrument is intended to be primarily an SPG with the
addition of PTP functionality, and the menu structure reflects this orientation.
Reference mode. The Reference mode selection restricts the possible PTP
functions as follows:
If the Reference mode is set to GPS, Genlock or Internal, the primary PTP
function is a master.
If the Reference mode is set to PTP, then the primary PTP function is restricted
to Slave PTP mode.
Automatically adapting between master and slave functions via the BMCA
is not supported.
Secondary PTP engine. A secondary PTP engine is also available. This allows
implementing two masters when in Internal mode or locked to GPS, and
simultaneous Master and Slave operation.
The primary and secondary PTP systems must be on different domains.
Presets. Most of the PTP functions are saved in the presets. After configuring
the instrument, a user can save the Power-on preset so that the desired instrument
state is restored when the instrument is powered on.
Black outputs. The black outputs support a 1pps mode. This is useful for
measuring timing between systems.
Firmware update. After a firmware update, the presets are often not valid and will
usually be erased. Therefore, after an update please use the REF button menu to
reselect either GPS or PTP as the Reference mode, and then use the PTP button
menu to reselect all of the parameters. Next, use the SYSTEM button menu to
resave the Power-on preset with your preferred settings.

Advertisement

loading
Need help?

Need help?

Do you have a question about the SPG8000A and is the answer not in the manual?

Questions and answers

Related Manuals for Tektronix SPG8000A

Summary of Contents for Tektronix SPG8000A

  • Page 1 SPG8000A Option PTP operation instructions This document describes how to configure the SPG8000A to operate in your PTP network and also provides information about the basics of PTP operation. A list of known bugs and operational limitations are included. How to configure Option PTP on the SPG8000A...
  • Page 2 Internal mode. If the SPG8000A is to be a PTP slave, select PTP mode. If the SPG8000A is to be both a PTP master and slave, select PTP mode and then configure the secondary master. 3. If Genlock mode is selected as the Reference mode, then also set the time to VITC, LTC, or Internal.
  • Page 3 Reference selection. Adaptive mode between master and slave is not supported. The Secondary PTP function is only a master. The primary and secondary PTP functions cannot be on the same domain. The SPG8000A will display an error message if an attempt is made to set them to the same domain.
  • Page 4 SPG8000A Option PTP operation instructions Domain. Defaults to a reasonable setting for each profile. Users are not allowed to set both PTP engines to the same domain. Communication mode. All of the master and slave devices on a given domain must use compatible communication modes.
  • Page 5 This should not be necessary if the network is PTP aware. ST2059 profile menu selections. When ST2059 is the selected profile and the SPG8000A is configured as a PTP master, these additional menu selections appear. These settings only drive the Synchronization Metadata message content and have no effect on the operation of the master.
  • Page 6 Web UI and SNMP The Web UI and SNMP allow users to control of most of the instrument functions that are available from the front panel. See the SPG8000A User Manual for more information on the SNMP command set. Known bugs and...

  • Page 7: Ptp Operational Overview

    PTP operational overview PTP introduction Option PTP for the SPG8000A adds two Precision Time Protocol (PTP) engines to the SPG system. The primary PTP engine has the capability to be a master PTP source or lock the SPG to the PTP as a slave. The secondary PTP engine can only be a master.
  • Page 8 SPG8000A Option PTP operation instructions The five basic PTP timing There are five basic timing messages in a PTP system: Announce, Sync, Follow-up, Delay request, and Delay response. Other messages are present in messages some instances. For example, grant requests and responses appear in unicast systems, and Type Length Value (TLV) management messages appear in SMPTE ST2059 profile systems.
  • Page 9 The profile defines the default and range of each parameter, and defines with options are required, allowed or prohibited. In the SPG8000A, the profile can be initialized to the default value for a given profile and mode. After setting the reference mode, the user should go to the PTP menu and select the profile.

  • Page 10: Operation

    AVB (802.1AS) profile, and domain 127 could be a master on the SMPTE ST2059 profile. Since the SPG8000A has two PTP engines, the instrument can provide PTP mastering on two domains and two profiles simultaneously. With multiple SPGs, more domains and profiles can coexist on the same network.
  • Page 11 SPG8000A Option PTP operation instructions Multicast system messages. Multicast messages are broadcast and so they can be received without knowing the address of the sender. This allows a slave to hook up to the network, receive the announce messages and discover the identity of the master.
  • Page 12 Traffic mismatch on the two paths, message type mismatch, and cable delay variation. The paragraphs below contain hints on how to design the system to minimize the delay asymmetry. Alternatively, the SPG8000A provides a way to manually enter a correction value to cancel the delay error.
  • Page 13 SPG8000A Option PTP operation instructions Traffic mismatch. Another cause of asymmetric delay is traffic mismatch on the two paths. If there is a high percentage of traffic utilization on the master to slave path, then most of the PTP messages may be delayed significantly. If the traffic on the other direction is significantly different, then the messages on the path...