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MINI-LINK TN R3 ETSI
Table 1
Fault handling on a V-polarization link
Vertical Polarization
Tx
side
Starting
f1-V
A
condition
and
f2-V
B
V
Tx
N.A.
A
fault
handling
V
Tx
N.A.
A
fault
handling
V
N.A.
A
propaga
-tion fault
handling
In case of not-hitless switching traffic disruption of a comparable entity on both
polarizations may happen.
In hot-standby mode when the switching process is initiated the receivers will
lock to the new active TX and the XPIC units will re-converge. The new active
receiver both for H link and V link will be the quicker receiver to lock.
4.7
Transmit Power Control
The radio transmit power can be controlled in Remote Transmit Power Control
(RTPC) or Automatic Transmit Power Control (ATPC) mode, selectable from
the management system including setting of associated parameters. In ATPC
mode the transmit power can be increased rapidly during fading conditions and
allows the transmitter to operate at less than the maximum power during normal
path conditions. The normally low transmit power allows more efficient use of
the available spectrum while the high transmit power can be used as input to
path reliability calculations, such as fading margin and carrier-to-interference
ratio.
The transmitter can be turned on or off from the management system.
90
Working Standby
Horizontal
Polarization
Rx side
Tx
side
f1-V
f1-H
A
A
and
f2-H
B
f2-V
,
N.A.
B
disruption
accepted
f2-V
,
N.A.
B
disruption
accepted
f2-V
,
N.A.
B
hitless
Vertical Polarization
Rx side
Tx
Rx side
side
V
V
f1-H
A
A
f1-H
or
V
V
A
B
f2-H
,
(quickest
B
disruption
locked-in),
accepted
disruption
accepted
f1-H
or
N.A.
V
A
f2-H
,
disruption
B
disruption
accepted
accepted
f1-H
or
N.A.
V
A
f2-H
,
B
hitless
4/1555-CSH 109 32/1-V1 Uen B 2007-09-14
Hot Standby
Horizontal
Polarization
Tx
Rx side
side
H
H
A
A
or V
No
H
A
B
action
(quickest
locked-in),
disruption
accepted
,
N.A.
H
B
disruption
accepted
, hitless
N.A.
H
B
hitless
A
or H
A
B
or H
,
A
B
or H
,
A
B
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