Orolia Spectracom VelaSync 1232, Руководство пользователя

Страница: 124 / 268

Title Reference
Frequency External Frequency input
GNSS GNSS input
PTP PTP input
IRIG IRIG timecode input
Local System Built-in clock OR internal 1PPS generation
NTP NTP input
User Host (time is manually set by the user)
HAVEQUICK HAVEQUICK input
The number displayed indicates the number of feature inputs of that type presently
installed in the VelaSync– starting with “0” representing the first feature input. For
example:
IRIG 0 = 1
st
IRIG input instance
Frequency 1 = 2nd frequency input instance
NTP 2 = 3rd NTP input instance
The columns of the Reference Priority table are defined as follows:
Priority —Defines the order or priority for each index (row). The range is 1 to 16,
with 1 being the highest priority and 16 being the lowest priority. The highest priority
reference that is available and valid is the reference that is selected.
Time —The reference selected to provide the necessary “Time” reference.
1PPS —The reference selected to provide the necessary “1PPS” reference.
Enabled —The reference is enabled.
Delete —Removes the Index (row) from the Reference Priority table.
3.3.1.1 Configuring Input Reference Priorities
VelaSync can use numerous external time sources, referred to as "references". As external
time sources may be subject to different degrees of accuracy and reliability, you can
determine in which order (= priority) VelaSync calls upon its external time and 1PPS ref-
erences.
For additional information, see also "Input Reference Priorities" on page 110 .
Accessing the Reference Priority Screen
To access the Reference Priority Setup screen:
112
CHAPTER
3
•
VelaSync 1232 User Manual Rev. 4
3.3 Managing References