Configuring Input Reference Priorities - Spectracom VelaSync 1232 User Manual

3.3 Managing References
Table 3-1:
ASCII Timecode
External 1PPS input
Frequency
GNSS
PTP
IRIG
Local System
NTP
User
HAVEQUICK
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
Frequency 1 = 2nd frequency input instance
NTP 2 = 3rd NTP input instance
The columns of the
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 pri-
ority 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 references.
For additional information, see also
112
Reference priority titles
Title
ASCII serial timecode input
External 1PPS input
External Frequency input
GNSS input
PTP input
IRIG timecode input
Built-in clock OR internal 1PPS generation
NTP input
Host (time is manually set by the user)
HAVEQUICK input
st
IRIG input instance
Reference Priority
"Input Reference Priorities" on the previous
Reference
table are defined as follows:
CHAPTER 3 • VelaSync User's Manual Rev. 3
page.