12 Attachment: Technical Information
12.6.21 LIU - Line Interface Unit
Input signal:
2.048 MHz reference clock, TTL level
Clock:
T1 - 1.544 MHz
E1 - 2.048 MHz
BITS:
Framed Outputs 1544 kBit/s
or 2048 kBit/s (ESF - Extended Superframe)
T1 - 1.544 MBit/s
E1 - 2.048 MBit/s
Outputs:
balanced - RJ45 jack - 120
Ω
(Clock)
unbalanced - BNC connector 75
Ω
(Bits)
Short term stability
and Accuracy:
depends on oscillator of the reference clock
OCXO-SQ:
+-5
·
10
-10
OCXO-MQ:
+-2
·
10
-10
OCXO-HQ:
+-5
·
10
-12
OCXO-DHQ: +-2
·
10
-12
Rubidium:
+-2
·
10
-11
LED Indicators
Power T1 E1
Power:
Init
blue during initialisation,
green in normal operation mode
T1:
green
selected mode T1
red:
output disabled
yellow:
signal quality unknown
E1:
green
selected mode E1
red:
output disabled
yellow:
signal quality unknown
Power
T1 E1
LIU
A4000
BITS 1
BITS 2
BITS 3
BITS 4
Power
T1 E1
Clock 1
Clock 2
Clock 3
Clock 4
LIU
A0004
IMS - LANTIME M1000
Date: 2nd July 2020
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