Web Page Reference
116
SNTP IP Address:
The IP Address of the networked SNTP Server.
SNTP Port Number:
The port number of the networked SNTP server. By convention the default
value for the port number is 123.
SNTP Poll Interval:
The period at which the SNTP client polls the server for time correction
updates. Default 1 hour. If for any reason an SNTP poll fails, the client will automatically perform
3 retries before waiting for the user defined poll period.
Time Zone:
The time zone is a fixed offset from GMT that is added to the SNTP time to allow
the expression of time in all geographic time zones.
Daylight Saving:
Allows a fixed offset of one hour to be added to the SNTP time in order to
reflect the local daylight saving time.
8.3.10.9
Setting the Clock
The PTP 500 Series bridge has a system clock which can be used to supply accurate date and
time information in the absence of a SNTP server. The system clock is battery backed and will
continue to operate for several days if the 500 Series bridge has been switched off.
SNTP State:
If the SNTP State is set to “Disabled”, see
, then the Remote Manage-
ment web page allows the following attributes to be set:
Set Time:
Shows the current time in 24 hour mode. The three editable fields display hours minutes
and seconds.
Set Date:
Displays the current date. The year, month and day can be set using the drop-down
selection boxes.
Time Zone:
See
“Setting The Clock”.
Daylight Saving:
See
“Setting The Clock”
8.3.11
Diagnostics
To further enhance the diagnostic capabilities of the PTP 500 Series, the storage of link performance
histograms has been extended to 31. To optimize RAM (volatile memory) usage a cascading
histogram approach has been adopted. The root histogram is identical to the histograms in earlier
releases of the software, that is data is stored for one hour at a resolution of one second. Previously,
the histograms were simple cyclic buffers which never stored more that the last one hour of data.
The new cascading histogram approach daisy chains multiple histograms together. When the first
histogram fills up the overflow from the first is used as an input to the next histogram in line.
To optimize memory utilization, a statistical analysis is performed on the overflow to reduce the
amount of data to be stored. In the case of the PTP 500 Series the cascading histograms are
defined as:
•
Histogram 1: 1 hour at a resolution of 1 second
•
Histogram 2: 24 hours at a resolution of 1 minute
•
Histogram 3: 30 Days at a resolution of 1 hour
Содержание MOTOWI 4
Страница 1: ...PTP 500 Series User Guide phn 1115 000v001 ...
Страница 74: ...Web Page Reference 74 Figure 37 Save Configuration File Screen ...
Страница 100: ...Web Page Reference 100 Figure 59 Spectrum Management as seen from the Master ...
Страница 108: ...Web Page Reference 108 Figure 66 Spectrum Management Master Screen With Operational Restrictions ...
Страница 112: ...Web Page Reference 112 Figure 68 Remote Management ...
Страница 165: ...Data Rate Calculations 165 Figure 112 QPSK 0 50 Single Payload Figure 113 QPSK 0 75 Single Payload ...
Страница 166: ...Data Rate Calculations 166 Figure 114 16 QAM 0 50 Single Payload Figure 115 16 QAM 0 75 Single Payload ...
Страница 167: ...Data Rate Calculations 167 Figure 116 64 QAM 0 67 Single Payload Figure 117 64 QAM 0 83 Single Payload ...
Страница 168: ...Data Rate Calculations 168 Figure 118 256 QAM 0 75 Single Payload Figure 119 QPSK 0 50 Dual Payload ...
Страница 169: ...Data Rate Calculations 169 Figure 120 QPSK 0 75 Dual Payload Figure 121 16 QAM 0 50 Dual Payload ...
Страница 170: ...Data Rate Calculations 170 Figure 122 16 QAM 0 75 Dual Payload Figure 123 64 QAM 0 67 Dual Payload ...
Страница 171: ...Data Rate Calculations 171 Figure 124 64 QAM 0 83 Dual Payload Figure 125 256 QAM 0 75 Dual Payload ...
Страница 197: ...Glossary 197 UTP Unshielded Twisted Pair VLAN Virtual Local Area Network ...
