MITS Janus Time Engine
Page 2 of 39
Copyright© Instrumentation Technology Systems 2020
20200929
TABLE OF CONTENTS
CHANGE HISTORY ................................................................................................................................................... 4
1.0
GENERAL DESCRIPTION ............................................................................................................................ 5
1.1
J
ANUS
T
IME
E
NGINE
M
ASTER
C
ONTROLLER
(JTEMC) ................................................................................................. 5
1.1.1
Time Master .................................................................................................................................... 5
1.1.2
IRIG B Inputs .................................................................................................................................. 7
1.1.3
1PPS Inputs ..................................................................................................................................... 7
1.1.4
GPS Time Reference ....................................................................................................................... 8
1.1.5
PTPV2 Master Clock Function ....................................................................................................... 8
1.1.6
Time of Day Clock .......................................................................................................................... 9
1.1.7
Time Zone Offset ............................................................................................................................ 9
1.1.8
Ethernet ........................................................................................................................................... 9
1.1.9
Settings Flash ................................................................................................................................ 10
1.1.10
I/O Interface .................................................................................................................................. 10
1.2
P
HOTO
-S
ONICS
I
NTERFACE
(PSI/O) ...................................................................................................................... 11
1.2.1
Time code and frequency output ports .......................................................................................... 11
1.3
IRIG
B
TIME CODE GENERATOR
............................................................................................................................. 12
1.3.1
An IRIG B127 output buffer ......................................................................................................... 12
1.3.2
An IRIG B007 output buffer ......................................................................................................... 12
1.4
P
ROGRAMMABLE
F
REQUENCY
G
ENERATORS
............................................................................................................ 12
1.4.1
Clock A ......................................................................................................................................... 12
1.4.2
Clock B ......................................................................................................................................... 12
2.0
NETWORK TIME SYNCRHONIZATION...................................................................................................... 12
2.1
NTP
D
ECODE
/C
ORRECTION
................................................................................................................................. 13
2.2
PTP
S
YNCHRONIZER
A
LGORITHM
.......................................................................................................................... 13
3.0
WEBSERVER ........................................................................................................................................... 13
3.1
H
OME
P
AGE
...................................................................................................................................................... 14
3.1.1
Time frame .................................................................................................................................... 14
3.2
A
DMIN PAGE
..................................................................................................................................................... 15
3.2.1
Session Control frame ................................................................................................................... 15
3.3
C
HANGE
L
OGIN PAGE
.......................................................................................................................................... 16
3.4
I
NPUTS PAGE
..................................................................................................................................................... 16
3.4.1
Priority frame ................................................................................................................................ 16
3.4.2
TCP/IP Frame ............................................................................................................................... 17
3.4.3
Network Time Reference .............................................................................................................. 18
3.4.4
IRIG Reference ............................................................................................................................. 18
