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
How to configure Option PTP on the SPG8000A
and operational limitations are included.
General information
The operat
addition of PTP functionality, and the menu structure reflects this orientation.
Reference mode. The Reference mode selection restricts the possible PTP
functions as follows:
Seco
implementingtwomasterswheninInternalmodeorlockedtoGPS,and
simultaneous Master and Slave operation.
The primary and secondary PTP systemsmustbeondifferentdomains.
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.
ion of the instrument is intended to be primarily an SPG with the
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.
ndary PTP engine. A secondary PTP engine is also available. This allows
www.tek.com
Copyright © Tektronix
*P061441700*
061-4417-00
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.
SPG8000A Option PTP operation i nstructions
Basic setup
recommendations
1. Use the SYSTEM b
DHCP or Manual mode. (Press the SYSTEM button, and then press the down
arrow twice to access the menu.)
NOTE. Both PTP ports share the same network address. See the PTP network
settings section below for information about how to configure the two PTP ports.
2. Use the REF button menu to set the Reference mode depending on whether
the SPG8000A will be a PTP master, slave or both. (Press the REF button,
and then press the left or right arrow to select. Press ENTER to confirm the
selectio
3. If Genlock mode is selected as the Reference mode, then also set the time to
VITC, LTC, or Internal. In addition, select to use the ST309 data as "input" if
ST309
on Drop Frame time code in the limitations section of this document.
n.)
If the SPG8000A is to be the PTP master, select either GPS, Genlock or
Interna
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
andthenconfigure the secondary master.
l mode.
date information is available in the input timecode. Note the limitations
utton menu to set the PTP network IP address using
4. Use t
5. If desired, press the PTP button a second time to access the s econdary PTP
6. Configure the rest of the SPG8000A as per the online m anual for the SPG8000.
hePTPbuttonmenutoconfigure the Primary master or slave PTP
profile, message rates, etc. (Press the PTP button once, and then use the arrow
keys and the ENTER / BACK keys as necessary to make selections.)
engine. Select parameters as needed.
2
SPG8000A Option PTP operation instructions
SYSTEM button
additions
menu
PTP network set
to set the Network parameters on the PTP connection. Use this menu to set the
DHCP/Manual and other network selections.
This menu also allows setting the DSCP level on the PTP messages. For most
situations, the default value of 0 for noncritical General messages and 46 for the
Event messages is appropriate. If you are using the AES67 profile, it may help to
set both message types to the maximum value of 56. Changing these values resets
all of the PTP systems and will disrupt the PTP operation for about 35 seconds.
This menu also allows control of the internal switch. The RJ45 and SFP ports can
be configured as fully cross-linked, isolated or to mirror the RJ45 to the SFP. For
most appl
ports to both access PTP functions and not allow cross traffic. If you want the
ports to work like a normal switch, use the Cross-linked setting. In this setting, all
traffic into either port will echo out the other port. In Mirror mode, all the traffic
in and out of the RJ45 port will be echoed to the SFP port. This is useful if you
need to use Wireshark on a Unicast system. In this case, hook the Wireshark PC
to the S
Epoch settings. A second new submenu in the SYSTEM button menu controls
the Epoch Selection, which is intended to change the timing on the Black outputs.
For PTP systems, set this to the 1970 epoch.
FP port and use the internal switch to mirror the traffic.
tings. A new submenu in the SYSTEM button menu allows users
ications the Isolated setting is appropriate. This setting allows the two
New PTP button menu
There are two PTP functions: Primary and Secondary. Press the PTP button
repeatedly to toggle between the two functions.
The Primary PTP function will be either Master or Slave depending on the
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.
The entries in the PTP menu vary depending on modes of the instrument.
Master and Slave modes need different settings. Multicast, Unicast and Mixed
modes have different settings. Different profiles allow different ranges for
some parameters. The possible PTP menu entries are listed below with a basic
description of their function:
Master can be enabled or disabled. Slave is always on.
Profile Type. The following profile types are available: General, ST2059,
AVB and AES67. Since each profile retains unique settings, each parameter
must be set for each profile type.
Press ENTER to set def aults for the selected profile. The defaults will set a
nominal value given the selected profile.
3
SPG8000A Option PTP operation i nstructions
Domain. Defaul
allowed to set both PTP engines to the same domain.
Communicatio
must use compatible communication modes. For most profiles, this means
the master and sla ve communication modes need to match exactly. On the
SMPTE profile, the Multicast and Mixed modes are compatible, s o a master
in any of these modes will work with a slave in any of those modes.
Unicast is separate and the master and slave must match. Note that the
Unicast, and Mixed without negotiation modes require that the IP address
of all the masters be entered into the Acceptable Master Table (AMT) of
the slave
Announce interval allows setting the rate at which the master will send
announc
Required. The slave will start by requesting the Desired rate. If the master
refuses that rate, the slave will request a slower rate. This continues down
to the Required setting. If the master cannot support the Required setting,
the communication will not start. The default for the Required setting is the
minimum rate / maximum interval allowed in the profile.
Sync interval allows setting the rate at which the master will send sync
messages. For Unicast mode there are two settings: Desired and Required.
The s
rate, the slave will request a slower rate. This continues down to the Required
setting. If the master cannot support the Required setting, the communication
will not start. The default for the Required setting is the minimum rate /
maximum interval allowed in the profile.
.
e messages. For Unicast mode there are two settings: Desired and
lave will start by requesting the Desired rate. If the master refuses that
ts to a reasonable setting for each profile. Users are not
n mode. All of the master and slave devices on a given domain
Delay Message allows setting the rate at which the master will send delay
request messages. For Unicast mode there are two settings: Desired and
Required. The slave will start by requesting the Desired rate. If the master
efuses that rate, the slave will request a slower rate. This continues down
r
to the Required setting. If the master cannot support the Required setting,
the communication will not start. The default for the Required setting is the
minimum rate / maximum interval allowed in the profile.
Announce timeout count sets the number of announce messages which can be
missed before the device will assume the master is no longer present. After
that time, all the devices on the domain will start the process of selecting a
new master.
Priority 1 and 2 are used in the BMCA to select the active master. Typically,
all the masters should have the Priority 1 parameter set to the same value,
and then use the Priority 2 parameter to select the primary master if all have
the same clock quality. A lower value is preferred. For example, if you set
the Priority 2 parameter of the primary master to 127, then set the Priority 2
parameter of all other masters to 128.
4
Loading...