LIU : Line Interface Unit
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Generation of reference clocks for
synchronization tasks
The module LIU (Line
Interface Unit) generates
different reference clock pulses which are
derived from the GPS-locked master oscillator
of a preconnected GPS clock. The output
signals are available with high accuracy and
stability therefore.
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Related Pages
MEINBERG: Quality Management
System 
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Key Features
- Synchronization of telecom
networks
- Synchronization of transmitters/base
stations (GSM/CDMA/UMTS/DAB/DVB)
- Synchronization/calibration of
laboratory equipment
- Clock and Framed telecom
outputs
- Reference frequency delivered by
preconnected GPS-receiver
GPS170/GPS170SV
- Standard frequency
outputs
Characteristics
| Control
elements: |
E1- or T1-generator,
settable by DIL-switch or control input |
| Frequency
outputs: |
1 x 5 MHz sinewave and 1 x
10 MHz sinewave, 0.6 Vrms into 50 Ohm,
unbalanced |
| Accuracy of
frequency outputs: |
The accuracy of the
generated output signals depends on the master
oscillator of the preconnected GPS-satellite
controlled clock. The following options are
available:
Option Short term stability with
GPS-synchronization
OCXO MQ ±2·10E-10
OCXO HQ ±5·10E-12
Rubidium ±2·10E-12 |
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Interface: |
Clock Outputs:
4 x 2.048 MHz (E1-mode) or 1.544 MHz (T1-mode),
G.703, 75 Ohm, unbalanced and
4 x 2.048 MHz (E1-mode) or 1.544 MHz (T1-mode),
G.703, 120 Ohm, balanced
Framed Outputs:
4 x 2.048 Mbps (E1-mode) or 1.544 Mbps (T1-mode),
75 Ohm, unbalanced or
4 x 2.048 Mbps (E1-mode) or 1.544 Mbps (T1-mode),
120 Ohm, balanced
Output pulses according to G.703 (E1-mode) or
T1.403 (T1-mode) (T1-Mode) Line Coding HDB3
(E1-mode) or B8ZS (T1-mode) |
| Dimensions of the
front panel: |
Width of the front panel
depends on the number of front side outputs
4HP/3U - 16HP/3U (20 - 80mm x 128mm) |
| Electrical
connectors: |
64 pin rear VG edge
connector DIN 41612
Female BNC-connectors for unbalanced outputs
BNC-Twinax-connectors for balanced outputs |
| Power
supply: |
+5V DC |
| Current
consumption: |
approx. 470mA |
| Board
type: |
Eurocard |
| Board
dimensions: |
160mm x 100mm , 1,5mm
Epoxy |
| Ambient
temperature: |
0 ... 50°C / 32 ...
122°F |
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Humidity: |
Max. 85% |
| RoHS-Status of the
product: |
This product is fully RoHS
compliant |
| WEEE status of the
product: |
This product is handled as
a B2B category product. In order to secure a WEEE
compliant waste disposal it has to be returned to
the manufacturer. Any transportation expenses for
returning this product (at its end of life) have
to be incurred by the end user, whereas Meinberg
will bear the costs for the waste disposal
itself. |
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Downloads
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Please note that only the most recent manual
version is available for download. This manual
therefore may not be suitable for all product
versions.
- For drivers, SDKs, tools and utilities, please
check our Download
area
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