Ross 4500DR-104-07, User Manual, Page: 145 / 161

SRG-4500 User Guide (v7.0) PTP Option • 145
PTP Option
The SRG-4500 always contains the hardware, software and associated circuitry necessary to allow operation of the
PTP Option. An Option Key is used to enable the PTP Option. No additional externally connected hardware is
required as part of the installation.
 Ensure the SRG-4500 is GPS locked if the SRG-4500 will be used as a Grandmaster.
Installation
The PTP Option becomes operational after the relevant Option Key has been entered on the Option Enable menu. A
power cycle may be required to complete the update process.
Physical Connections
In order to utilize the PTP Option, use an Ethernet cable to the
GbE/PTP
port and connect the SRG-4500 to your
local network device (master router or local hub).
Figure 17.1 SRG-4500 Rear Panel — Cabling the PTP Option
Refer to the section “ PTP Menu ” on page 68 for information on configuring the Network and PTP systems with
your required parameters.
Before You Begin
The SRG-4500 has one Precision Time Protocol (PTP) engine. This PTP engine can be set as a PTP Grandmaster
source or set as a PTP Follower to lock the SRG-4500 to a remote PTP Grandmaster.
The basic operating mode of the SRG-4500 is set in the
Genlock Select menu. When PTP is also considered then
the mode of PTP must be configured in conjunction with the Genlock mode of the SRG-4500. The Genlock mode
selected determines the allowed function of the primary PTP engine as follows:
• The PTP engine must be configured as a
Grandmaster when the SRG-4500 reference selection is set to one of
the following options:
› GPS Frequency and Phase lock (PTP serves TAI time)
› Internal (Free run) (PTP serves TAI Time)
› Genlock to Video (PTP serves TAI Time)
› Genlock to Video + VITC (PTP serves TAI Time)
› 10 MHz lock (PTP serves TAI Time)

The PTP engine serves TAI time. If the Grandmaster is GPS or VITC locked, you cannot change the time PTP is
serving. If the SRG-4500 is set to free run mode, it will serve TAI time based on the SRG-4500 UTC time. The
GbE / PTP
100-BaseT
GPS 1Hz 10MHz IN 10MHz WK/TTL1 WK/TTL2 6Hz/TTL3 DARS AES 1 AES 2 BALANCED AUDIO/AES/LTC
COMPOSITE BLACK 1 REF LOOP TRI/BLACK 2 TRI/BLACK 3 TRI/BLACK 4 SDI 2 BLACK SDI 1 SDI 1 BLACK SDI 2
SDI 4 BLACK SDI 3 SDI 3 BLACK SDI 4
SRG-4500
MEDIA NETWORK