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CHAPTER 5: SETTINGS
PRODUCT SETUP
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
5-85
5
In unusual cases where the length of the link is different in different directions, set this setting to the number of
nanoseconds the Ethernet propagation delay to the relay is longer than the mean of path propagation delays to and from
the relay. For instance, if it is known say from the physical length of the fibers and the propagation speed in the fibers that
the delay from the relay to the Ethernet switch it is connected to is 9000
ns and that the delay from the switch to the relay
is 11000
ns, then the mean delay is 10000
ns, and the path delay asymmetry is 11000 - 10000 = +1000
ns.
5.3.6.3 SNTP protocol
SETTINGS
PRODUCT SETUP
REAL TIME CLOCK
SNTP PROTOCOL
The L60 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the L60 can obtain clock time over
an Ethernet network. The L60 acts as an SNTP client to receive time values from an SNTP/NTP server, usually a dedicated
product using a GPS receiver. UR series relays support unicast, broadcast, multicast, and anycast SNTP functionality.
The
SNTP FUNCTION
setting enables or disables the SNTP feature on the L60.
To use SNTP in unicast mode, set
SNTP SERVER IP ADDR
to the SNTP/NTP server IP address. Once this address is set and
SNTP
FUNCTION
is “Enabled,” the L60 attempts to obtain time values from the SNTP/NTP server. Since many time values are
obtained and averaged, it generally takes three to four minutes until the L60 clock is closely synchronized with the SNTP/
NTP server. It takes up to two minutes for the L60 to signal an SNTP self-test error if the server is offline.
To use SNTP in broadcast mode, set the
SNTP SERVER IP ADDR
setting to “0.0.0.0” and
SNTP FUNCTION
to “Enabled.” The L60
then listens to SNTP messages sent to the “all ones” broadcast address for the subnet. The L60 waits up to 18 minutes
(>1024 seconds) without receiving an SNTP broadcast message before signaling an SNTP self-test error.
The
SNTP UDP PORT NUMBER
is 123 for normal SNTP operation. If SNTP is not required, close the port by setting the port
number to 0, after which the change takes effect when the L60 is restarted.
5.3.6.4 Local time
SETTINGS
PRODUCT SETUP
REAL TIME CLOCK
LOCAL TIME
SNTP PROTOCOL
SNTP FUNCTION:
Disabled
Range: Enabled, Disabled
SNTP SERVER IP ADDR:
0.0.0.0
Range: standard IP address format
SNTP UDP PORT
NUMBER: 123
Range: 0 to 65535 in steps of 1
NOTE
Do not set more than one protocol to the same TCP/UDP port number, as this results in unreliable operation of
those protocols.
LOCAL TIME
LOCAL TIME OFFSET
FROM UTC: 0.0 hr
Range: –24.0 to 24.0 hr in steps of 0.5
DAYLIGHT SAVINGS
TIME: Disabled
Range: Disabled, Enabled
DST START MONTH:
January
Range: January to December (all months)
DST START DAY:
Sunday
Range: Sunday to Saturday (all days of the week)
DST START DAY
INSTANCE: First
Range: First, Second, Third, Fourth, Last
DST START HOUR:
2:00
Range: 0:00 to 23:00
DST STOP MONTH:
January
Range: January to December (all months)
Содержание L60
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Страница 464: ...5 334 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL TESTING CHAPTER 5 SETTINGS 5 ...
Страница 498: ...7 10 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL TARGETS MENU CHAPTER 7 COMMANDS AND TARGETS 7 ...
Страница 570: ...10 14 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL DISPOSAL CHAPTER 10 MAINTENANCE 10 ...
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Страница 588: ...C 4 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL REVISION HISTORY APPENDIX C MISCELLANEOUS C ...
Страница 592: ...iv L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL ABBREVIATIONS ...