Ericsson MINI-LINK E, Technical Description

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MINI-LINK E and E Micro
6.1.5.2 Loops for MINI-LINK E Micro
Near-end Loops
Near-end loop tests are used to find out if and where the near-end terminal is
faulty. The following near-end loop tests are available:
Tx Loop (E1:1 and
E1:2 in MSM)
The traffic signal to be transmitted is, immediately at
the input, looped back to the output on the receiving
side.
RF Loop The RF signal to be transmitted is immediately before
the branching looped back to the receiving side.
Far-end Loop
Far-end loop tests are used to find out if and where the far-end terminal is
faulty. The following far-end loop test is available:
Rx Loop (E1:1 and
E1:2 in MSM)
The traffic signal to be received is looped back to
the transmitting side.
R a d i o F r a m e
M u l t i p l e x e r
M o d u l a t o r
D e m o d u l a t o r
R F L o o p
2 M b i t / s
2 M b i t / s
T r a f f i c
I n t e r f a c e
M I N I - L I N K E M i c r o T x L o o p
M I N I - L I N K E M i c r o R x L o o p
T r a n s m i t t e r a n d R e c e i v e r M C M ,
I F C o n v e r t e r a n d F i l t e r U n i t
R a d i o F r a m e
D e m u l t i p l e x e r
R F
3 5 6 3
Figure 75 Loops for MINI-LINK E Micro
6.1.6 Test Port
Each SMU and MMU has one test port on the front panel for traffic in/out
signals. Any traffic signal 2, 8 or 34 Mbit/s can be connected to this port.
The traffic channel can be monitored with for example an analyzer without
disturbing the traffic. A BER-meter can also be connected to the test port.
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AE/LZT 110 2012 R8C 2002-03-04