SOLiD 850C700LTEC RDU MODULE(850C/700LTEC) User Manual

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Document Description	User manual-4
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Document Type	User Manual
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Date Submitted	2010-08-30 00:00:00
Date Available	2010-08-30 00:00:00
Creation Date	2010-08-16 19:46:51
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Document Lastmod	2010-08-16 19:47:02
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Power Cable
Comm Cable
RF cables
- MS Connector with 3 hole to AC 120 plug(AC)
- MS Connector with 2 lug termination(DC)
- MS Connector which both end sides has 5hole
- One for interface TX signal with ROU
- Another for interface RX signal with ROU
Each 1EA
1EA
2EA
Basically, AOR supports type of one-body which include V/UHF RDU, AOR PSU and others
accessories
5.5.2
AOR Power Cabling
AOR supports both of DC-48V and AC120V of input power. As PSU for DC-48 and PSU for
AC120V are separated from each other, you need to select one of them in case of purchase
order.
RPSU for DC -48V and RSPU for AC 120V have the same configuration and capacity while
each of the units uses different input voltage from each other.
The following figure shows configuration of PSUs for DC -48V and AC 120V.
MC Connector
Lug Naming
AOR PSU Terminal naming
Remark
numbering
AC
DC
AC
DC
AC_H
-48V
AC-H
-48V
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B
AC_N
GND
AC-N
IN_GND
GND
DC NC
FG
FG
Check if the connection is the same as one seen in the table above and make sure before turn
the power ON. If you want to turn on the power of AOR, move PSU’s circuit break switch to
“I”status
Check if the POWER LED indicator on the AOR PSU is green lights status
Information of LED at the front RDU
When power of AOR is turned on, LED of the PSU front panel shows the following
information:
LED
Description
Power is not supplied
ON
Power is supplied.
Normal Operation
ALM
Abnormal Operation
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5.5.3
GND Terminal Connection
AOR has one GND terminal port where is on rear side, like below
Take off the GND terminal port from enclosure and connect to ground cable, then fix it
the position of enclosure again
The opposite end of the ground cable should connect to the communication GND of
building
The ground lug is designed meeting the SQ22 standard
5.5.4
Coaxial cable and Antenna Connection
AOR has two antenna port, the one is TX antenna and the others is RX antenna
The coaxial cables which are connected to antenna distribued network connect to two
antenna port of AOR. Before connection, check the VSWR value of coaxial cable
whether it is within specification using SITEMASTER .
At this time, check if the Return loss have above 15Db or VSWR have below 1.5
The part of antenna connection fasten to port not to be loosed and not to be injected
the dusty and insects
The antenna connected to AOR is only serviced in inbuilding
5.5.5
Consumption Power of AOR
The following table shows power consumptions of AOR:
Part
AOR
Unit
RDU VHF+UHF
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Consumption Power
Remark
VHF
47W
VHF HPA OFF
UHF
47W
UHF HPA OFF
FULL
74W
Both HPA ON
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5.5.6
Interface with existing ROU
AOR is not operated by themselves. TX/ RX signals receive/transmite through RF port terminal
of existing ROU. Also for communication with existing ROU, should connect cable on external
port of each other. The following shows the connection diagram with existing ROU:
Figure 5.10 – AOR which is installed above of ROU
Figure 5.11 – AOR which is installed under of ROU
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For connecting with exising ROU, need three sorts of cables
The following shows the interface point between existing ROU and AOR:
Interface Point
Items
Remark
Existing ROU Port
TX RF Cable
V/UHF TX
RX RF Cable
B/UHF RX
Communication signal
Cable
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EXTERNAL PORT
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AOR Port
TO
ROU
TX IN
SMA
RX OUT
SMA
EXTERNAL PORT
MS-CON
Section6
Operation
6.1 BIU Operation
6.2 ROU Operation
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This chapter describes operation of SMDR-NH124. It deals with procedures and operations for
normal system operation after installation. It also describes operations per unit and interworking
methods.
6.1 BIU Operation
6.1.1
BIU
6.1.2
TX Operation at BIU
TX level to be sent to BIU should be in the range of -20dBm ~ + 10dBm. If the level exceeds the
range, you need to connect an attenuator with the front end of BIU input and adjust the level in
the corresponding range. Out of the range, maximal power cannot be outputted and so you
need to increase output power of BDA or adjust attenuation amount of BTS’s coupler or ATT to
adjust the level.
For signals of all bands, you need to check, using spectrum, if they are in an appropriate level
before making connection with input port of BIU and then check if there are spurious signals.
You need MDBU of a band you want to use. Insert the unit into BIU and check if it works
normally. For MDBU, up to two TX inputs are provided. Input level per port is -20dBm~+10dBm.
The following describe settings for 800MHz Public safety MDBU.
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Checking the status of the system’s LED Indicator
After turning on the switch of the power supply in BIU, check information on each
module’s LED of the system. The table below shows normal/abnormal cases
depending on the status of each module’s LED.
LED information
Unit
LED
ON
MDBU
Indicates
Green: MDBU is normally power-supplied.
Green: MDBU is normal.
ALM
Red: MDBU is abnormal; check the alarm through RS-232C.
MCPU
ON
Green: MCPU is normally power-supplied.
TXD
Green flicker: TX signals are transmitted to communicate with ROU.
RXD
Green flicker: RX signals are received from ROU.
Green: BIU system is normal.
ALM
Red: BIU system is abnormal; check the alarm through RS-232C.
ON
MPSU
Green: BIU is connected with power and MPSU works normally.
Green: DC output is normal.
ALM
Red: DC output is abnormal.
MDBU Setting
Insert MDBU into BIU. Check if the “ON” LED Indicator at the front panel of MDBU is lit green.
Make connection with DEBUG port of MCPU through RS-232 Cable (Direct Cable).
Check if the ID of MDBU module is searched for in those 1~4 slots of MDBU through GUI.
When you select the tab of a corresponding slot (MDBU 1~4) from the main window, you can
inquire and set the status of a corresponding MDBU module.
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Check if MDBU is inserted into a corresponding slot of BIU. The ID screen shows the following:
A.
MDBU ID: 800Public Safety, 800PS+900I+Paging, 850C, 700PS+850C, AWS-1,1900P
B.
Not Insert: This status value appears when MDBU has not been set.
C.
Link Fail: This status value appears when MDBU has been set but it fails to
communicate with modules.
Use the ON/OFF (Activation/de-activation) function for a port you want to use and turn it ON.
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Depneding on whether to use a port, output varies. Thus, make sure to turn OFF unused
ports.
The table below shows output power depneding on whether to use a port:
MDBU Band
Output level (Composite
No. of Max port (N)
power)
700PS
23dBm-10*LOG(N)
700LTEC
23dBm-10*LOG(N)
800PS
23dBm-10*LOG(N)
850Cellular
23dBm-10*LOG(N)
900I+Paging
23dBm-10*LOG(N)
1900PCS
26dBm-10*LOG(N)
AWS-1
26dBm-10*LOG(N)
VHF
24dBm-10*LOG(N)
UHF
24dBm-10*LOG(N)
Check if the level of TX IN POWER is the same as the value measured through spectrum
(Within ±3dB). Use TX IN AGC function and automatically set internal ATT depending on input
level. ATT is automatically set based on -20dBm of input . The table below shows TX IN ATT
depending on TX IN POWER. For manual setting, you can set ATT depending on input
according to the table.
TX IN POWER
TX IN ATT
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TX IN ATT
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TX IN POWER
TX IN ATT
-20dBm
0dB
-9dBm
11dB
+1dBm
21dB
-19dBm
1dB
-8dBm
12dB
+2dBm
22dB
-18dBm
2dB
-7dBm
13dB
+3dBm
23dB
-17dBm
3dB
-6dBm
14dB
+4dBm
24dB
-16dBm
4dB
-5dBm
15dB
+5dBm
25dB
-15dBm
5dB
-4dBm
16dB
+6dBm
26dB
-14dBm
6dB
-3dBm
17dB
+7dBm
27dB
-13dBm
7dB
-2dBm
18dB
+8dBm
28dB
-12dBm
8dB
-1dBm
19dB
+9dBm
29dB
-11dBm
9dB
0dBm
20dB
+10dBm
30dB
-10dBm
10dB
Edit Naming of a port and set it as a desired character string (up to 12 characters).For example,
the figure below shows a screen when you set “SPRINT” for port 1 and “T-MOBILE” for port 2.
Use various upper/lower limits. The following table shows recommended limit settings:
Item
Recommended Limit
Remark
TX IN HIGH ALM
15dBm
Alarm
TX IN LOW ALM
-25dBm
Alarm
RX OUT ALC
0dBm
Auto Level control
RX OUT HIGH ALM
5dBm
Alarm
As such, when you finish setting normal input levels and alarm limits, check if the value of
MODULE FAILUER LED Indicator is lit green (Normal case).
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6.1.3
RX Operation at BIU
For RX operation at BIU, you need to set RX gain to prevent BTS or BDA from being
affected. There is an ATT setting window to let you adjust gain per band and port.
Total RX gain is 50dB. To adjust a desired gain, you need to do the following. For RX
gain of a desired gain, you can set it as 50dB-RX ATT. Use the terminal and check if TX
Adjust value and Ec/Io value is appropriate.
To block high signals from entering BTS or BDA, keep ALC mode activated (ON).
6.1.4
Setting whether to use ROU/OEU at BIU
BIU controls overall system, working as common part in any equipment. Connect BIU
with such units as ODU, OEU and ROU to be interfaced with the BIU and manually set
whether to use the units at the INSTALL window of BIU.
To inquire and set information on units in lower level (OEU and ROU) at BIU, you need
to check on a corresponding item at INSTALL Menu for a unit to be actually used. This
setting makes BIU actually try to communicate with lower units while collecting the
status value of units.
The menu below shows INSTALL menu, where you can see topology for overall units
at a glance.
Overall topology for SMDR-NH124
Configuration of BIU-ODU-ROU
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Configuration on whether to use BIU varies depending on the topology above and so
you need to check on a unit to be installed.
Ex.) How to set INSTALL menu when ROU is connected with DOU1 of ODU1, which is
connected with BIU:
1. Select INSTALL from GUI menu.
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2. Check on ODU1 menu>DOU1>ROU1.
3. Close the INSTALL menu.
4. Check if ROU is created, which was checked on at the left TREE panel.
6.1.5
ODU Operation at BIU
BIU can be equipped with up to four ODUs. One ODU can hold two DOUs in it. For information
on insertion/deletion of DOU in ODU, you can see at the main window of BIU.
When you select ODU screen from the left TREE panel, you can see DOU1 or DOU2 menu
actiavted depending on whether DOU has been inserted. Then, the optical port set at the
INSTALL menu is also actiavted to let you check PD value of the optical port. Any optical port
not set at the INSTALL menu is seen de-activated in grey.
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The level of Laser diode received from ROU/OEU is +7dBm±0.5dB. The level of Photo diode
will be displayed with losses related to the length of optical cables and insertion loss of optical
connecters.
In general, the level of optical PD POWER should be +6dBm~ +2dBm±1.5dB.
What is more, ODU has the function of automatically compensating for optical cables. The
following procedure is related to how to make optical compensation with ROU connected with
port, at a corresponding DOU window of ODU:
1. Check if ODU is smoothly communicating with a corresponding ROU.
2. Select ODU or DOU from the left Tree panel.
3. Set “RX OPTIC COMP” of the optical port of a corresponding DOU as "ON."
4. During optical compensation , the Result window shows "Processing" and then a result
value. There are three types of results as follows:
A.
Success: The optical compensation is normally made.
B.
Over Optic Loss: Generated optical loss is 5dBo or more.
C. Communication Fail: Communication with ROU is in poor conditin.
5. ATT of optical compensation can work based on the numerical expression of 12-2*(LD
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POWER-PD POWER).
6. Optical compensation can be made not only in ODU but also in ROU.
6.2
ROU Operation
The figure below shows the level of the system link of SMDR-NH124 (BIU-ODU-ROU). This
section describes ROU-related information. ROU receives various signals through optical
modules. The signals are filtered only for corresponding signal band from a corresponding RDU
module and amplified with a High Power Amplifier. Then, the multiplexer combines the signals
with others and sends them with an antenna.
6.2.1
ROU Operation
ROU is in one-body enclosure type. ROU is located at a remote closet in a building.
And it can be installed on a wall or into a rack.
Basically, one antenna is provided. To install a variety of antennas, you need such
devices as a divider and a coupler. ROU can work with a DC Feeder and an Optic
Cable Feeder. For power supply of ROU, a power supply in AC-DC and DC-DC type is
provided to let you select a power supply suitable for an application.
For upper level, ROU can be connected with ODU and OEU. It has AGC function for 5dBo of
optical cable loss.
The following show operational procedures after installation of ROU.
Checking the status of ROU's LED Indicator
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After turning on the switch of the power supply in ROU, check information on each
module's LED of the system. The table below shows normal/abnormal cases
depending on the status of each module's LED.
Unit
LED
ON
Indicates
Green: ROU is normally power-supplied.
Green: Laser Diode is normal.
LD
Red: Laser Diode is abnormal.
Green: Photo Diode is normal.
PD
Red: Photo Diode is abnormal; check optical cables.
RCPU
Green flicker: TX signals are transmitted to communicate with
TXD
BIU/OEU.
RXD
Green flicker: RX signals are received from BIU/OEU.
Green: ROU system is normal.
ALM
Red: ROU system is abnormal; check the alarm through RS-232C.
ON
The power is not supplied.
The power is supplied.
RDU
ALM
Normal Operation
Abnormal Operation
RPSU
ON
The power is not supplied or the polarity of -48V is reversed.
The power is supplied.
ID Setting
Use an RS-232 Cable(Direct Cable) for connection with DEBUG port of ROU RCPU. Execute
GUI (Graphic User Interface). When you connect ROU directly with a Serial port, the screen will
show the TREE of a direct line of units connected with ROU. Basic ROU ID is set as ODU1DOU1-ROU1. Set it with the ID of a designed ROU. Before setting an ROU ID, you need to
check if ROU is connected with the optical port of ODU or OEU (See System Topology at
"Setting whether to use BIU").
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If multiple ROUs connected to BIU share the same ID, the screen will fail to read status
information on the ROUs with the same IDs. Therefore, make sure not to redundantly set ROU
ID.
Checking Communication LED of
RCPU
Check if TXD and RXD LEDs in RCPU make communication. Receiving FSK signals from BIU,
ROU sends requessted status value to BIU. During reception, RXD LED flicks. During
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tramsmission, on the other hand, TXD LED flicks. At this time, you need to check if whether to
use a corresponding ROU is checked on (See "whether to use BIU OEU/ROU").
ROU Optic Comp Operation
ROU has the function of automatically compensating for optical loss. It can do the work for up to
5dBo of optical loss. Set “TX OPTIC COMP” of ROU as "ON." Optical compensation of ROU
can not be made without communication with such units in upper level as ODU or OEU. For
1dBo of optical loss, basic TX OPTIC ATT is 12dB; for 5dBo of optical loss, TX OPTIC ATT is
4dB. OPTIC COMP works only one time before it stays dormant.
The figure below shows a screen for OPTIC Information in ROU GUI.
LD POWER means output level of ROU Laser Diode, which is sent to a upper unit by ROU. PD
POWER means input level of Photo Diode to be received from a upper unit.
During optical compensation, the Result window shows "Processing" and then a result value.
There are three types of results as follows:
1. Success: The optical compensation is normally made.
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2. Over Optic Loss: Generated optical loss is 5dBo or more.
3. Communication Fail: Communication with ROU is in poor conditin.
If ROU does not make optical compensation, there will be erors in the budget of system
link. It can cause lower output level or make Spurious Emission not satisfying for a standard.
RDU Setting
Insert an RDU+BPF assembly you want to offer service with it and then connect the Multiplexer
with interface cable (See Sector 5: How to install RDU at the INSTALL part).
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Through GUI, check if the ID of RDU module is inquired at LEFT, MIDDLE and RIGHT slots of
RDU. When you select the tab of a corresponding slot (LEFT, MIDDLE and RIGHT) from the
main window of ROU, you can inquire and set the status of a corresponding RDU module.
Set HPA of a corresponding RDU as “ON.” Use TX OUTPUT AGS function and set it as a
desired output level.
The table below shows maximally available Composit Powerlevels that can be set per band:
RDU Band
Power that can be
Setting range
maximally set
700PS
23dBm
0 ~ 23dBm
800PS
23dBm
0 ~ 23dBm
850Cellular
23dBm
0 ~ 23dBm
900I+Paging
23dBm
0 ~ 23dBm
1900PCS
26dBm
0 ~ 26dBm
AWS-1
26dBm
0 ~ 26dBm
VHF
24dBm
0~24dBm
UHF
24dBm
0~24dBm
AGS function enables you to adjust output power as you like. While the AGS function is being
executed, the Result window shows "Processing" and then a result value. There are three types
of results as follows:
A.
Success: The AGS function is normally made.
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B.
Not Opterate OPTIC Comp: Optic Comp is not executed.
C. Lack of ATT: There is no attenuation available.
Use various upper/lower limits. The following table shows recommended limit settings:
Item
Recommended Limit
Remark
TX OUTPUT HIGH ALM
Max Composit Power+1dB
Alarm
TX OUTPUT LOW ALM
0dBm
Alarm
TX OUTPUT ALC
Max Composit Power
Auto Level control
TX OUTPUT SD
Max Composit Power+2dB
Shutdown
RX ALC
-45dBm
If TX OUTPUT HIGH ALM is higher than a setting value, alarms will be genrated.
If TX OUTPUT LOW ALM is lower than a setting value, alarms will be genrated. TX OUTPUT
HIGH ALM/LOW ALM tends to work only as warning.
When you activate (“ON”) TX OUTPUT ALC, outputs will be restricted depending on a setting
output value.
When you activate (“ON”) TX OUTPUT SD, output will be turned OFF once output power level
reaches the same as SD setting value. Upon SD operation, check output level after 10 minutes
and then check the status again.
When you activate (“ON”) RX ALC, inputs will be restricted depending on a setting value.
As described above, when normal output level and alarm limit values are set, you need to check
if the value of MODULE FAILUER LED Indicator is normally seen green.
For unused bands, you need to use band turning-ON/-OFF function to turn them off. Once a
RDU band is turned off, its status value will not be used in case of alarms.
-------------------------------------------------------------------------------------------------------------------------------
6.3
OEU Operation
The figure below shows the level of the system link of SMDR-NH124 (BIU-ODU-OEU-ROU).
This section describes OEU-related information. OEU receives various signals through optical
modules. The optical signals are converted to RF signal and the RF signal also is amplified to
moderate signal level. To transmit to ROU, the signal is converted to optical signal
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6.3.1
OEU Operation
OEU is in shelf enclosure type. OEU is located at a remote closet in a building. And it
can be installed into a rack.
OEU is for role as hub. It is to expand toward campus cluster, it is only one optical
cable to expand 8ROU.This is reason why OEU supports up to 2DOU. The DOU
supports up to 4optical port to connect ROU
Basically, one antenna is provided. To install a variety of antennas, you need such
devices as a divider and a coupler. ROU can work with a DC Feeder and an Optic
Cable Feeder. For power supply of ROU, a power supply in AC-DC and DC-DC type is
provided to let you select a power supply suitable for an application.
For upper level, ROU can be connected with ODU and OEU. It has AGC function for 5dBo of
optical cable loss.
The following show operational procedures after installation of ROU.
Checking the status of ROU's LED Indicator
After turning on the switch of the power supply in ROU, check information on each
module's LED of the system. The table below shows normal/abnormal cases
depending on the status of each module's LED.
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Unit
LED
ON
Indicates
Green: ROU is normally power-supplied.
Green: Laser Diode is normal.
LD
Red: Laser Diode is abnormal.
Green: Photo Diode is normal.
PD
Red: Photo Diode is abnormal; check optical cables.
RCPU
Green flicker: TX signals are transmitted to communicate with
TXD
BIU/OEU.
RXD
Green flicker: RX signals are received from BIU/OEU.
Green: ROU system is normal.
ALM
Red: ROU system is abnormal; check the alarm through RS-232C.
ON
The power is not supplied.
The power is supplied.
RDU
ALM
Normal Operation
Abnormal Operation
RPSU
ON
The power is not supplied or the polarity of -48V is reversed.
The power is supplied.
ID Setting
Use an RS-232 Cable(Direct Cable) for connection with DEBUG port of ROU RCPU. Execute
GUI (Graphic User Interface). When you connect ROU directly with a Serial port, the screen will
show the TREE of a direct line of units connected with ROU. Basic ROU ID is set as ODU1DOU1-ROU1. Set it with the ID of a designed ROU. Before setting an ROU ID, you need to
check if ROU is connected with the optical port of ODU or OEU (See System Topology at
"Setting whether to use BIU").
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If multiple ROUs connected to BIU share the same ID, the screen will fail to read status
information on the ROUs with the same IDs. Therefore, make sure not to redundantly set ROU
ID.
Checking Communication LED of
RCPU
Check if TXD and RXD LEDs in RCPU make communication. Receiving FSK signals from BIU,
ROU sends requessted status value to BIU. During reception, RXD LED flicks. During
tramsmission, on the other hand, TXD LED flicks. At this time, you need to check if whether to
use a corresponding ROU is checked on (See "whether to use BIU OEU/ROU").
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ROU Optic Comp Operation
ROU has the function of automatically compensating for optical loss. It can do the work for up to
5dBo of optical loss. Set “TX OPTIC COMP” of ROU as "ON." Optical compensation of ROU
can not be made without communication with such units in upper level as ODU or OEU. For
1dBo of optical loss, basic TX OPTIC ATT is 12dB; for 5dBo of optical loss, TX OPTIC ATT is
4dB. OPTIC COMP works only one time before it stays dormant.
The figure below shows a screen for OPTIC Information in ROU GUI.
LD POWER means output level of ROU Laser Diode, which is sent to a upper unit by ROU. PD
POWER means input level of Photo Diode to be received from a upper unit.
During optical compensation, the Result window shows "Processing" and then a result value.
There are three types of results as follows:
4. Success: The optical compensation is normally made.
5. Over Optic Loss: Generated optical loss is 5dBo or more.
6. Communication Fail: Communication with ROU is in poor conditin.
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If ROU does not make optical compensation, there will be erors in the budget of system
link. It can cause lower output level or make Spurious Emission not satisfying for a standard.
RDU Setting
Insert an RDU+BPF assembly you want to offer service with it and then connect the Multiplexer
with interface cable (See Sector 5: How to install RDU at the INSTALL part).
Through GUI, check if the ID of RDU module is inquired at LEFT, MIDDLE and RIGHT slots of
RDU. When you select the tab of a corresponding slot (LEFT, MIDDLE and RIGHT) from the
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main window of ROU, you can inquire and set the status of a corresponding RDU module.
Set HPA of a corresponding RDU as “ON.” Use TX OUTPUT AGS function and set it as a
desired output level.
The table below shows maximally available Composit Powerlevels that can be set per band:
RDU Band
Power that can be
Setting range
maximally set
700PS
23dBm
0 ~ 23dBm
700LTEC
23dBm
0 ~ 23dBm
800PS
23dBm
0 ~ 23dBm
850Cellular
23dBm
0 ~ 23dBm
900I+Paging
23dBm
0 ~ 23dBm
1900PCS
26dBm
0 ~ 26dBm
AWS-1
26dBm
0 ~ 26dBm
VHF
24dBm
0~24dBm
UHF
24dBm
0~24dBm
AGS function enables you to adjust output power as you like. While the AGS function is being
executed, the Result window shows "Processing" and then a result value. There are three types
of results as follows:
A.
Success: The AGS function is normally made.
B.
Not Opterate OPTIC Comp: Optic Comp is not executed.
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C. Lack of ATT: There is no attenuation available.
Use various upper/lower limits. The following table shows recommended limit settings:
Item
Recommended Limit
Remark
TX OUTPUT HIGH ALM
Max Composit Power+1dB
Alarm
TX OUTPUT LOW ALM
0dBm
Alarm
TX OUTPUT ALC
Max Composit Power
Auto Level control
TX OUTPUT SD
Max Composit Power+2dB
Shutdown
RX ALC
-45dBm
If TX OUTPUT HIGH ALM is higher than a setting value, alarms will be genrated.
If TX OUTPUT LOW ALM is lower than a setting value, alarms will be genrated. TX OUTPUT
HIGH ALM/LOW ALM tends to work only as warning.
When you activate (“ON”) TX OUTPUT ALC, outputs will be restricted depending on a setting
output value.
When you activate (“ON”) TX OUTPUT SD, output will be turned OFF once output power level
reaches the same as SD setting value. Upon SD operation, check output level after 10 minutes
and then check the status again.
When you activate (“ON”) RX ALC, inputs will be restricted depending on a setting value.
As described above, when normal output level and alarm limit values are set, you need to check
if the value of MODULE FAILUER LED Indicator is normally seen green.
For unused bands, you need to use band turning-ON/-OFF function to turn them off. Once a
RDU band is turned off, its status value will not be used in case of alarms.
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-------------------------------------------------------------------------------------------------------------------------------
Section7
Additive functions
7.1 Shutdown function
7.2 Total power limit function
7.3 Output power automatic setting function
7.4 Input power AGC function
7.5 Input power limit function
7.6 Optic loss compensation
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This chapter describes additive functions of SMDR-NH124.
7.1 Shutdown function (TX output shutdown)
The DAS has an automatic shutdown function to protect the DAS itself and the wireless
network when the normal operational conditions cannot be maintained
The DAS shut down automatically when the composite power downlink output power is
above the values defined as average for the device for a period not to exceed
5seconds. Criterion level is set through GUI
After automatic shutdown, the DAS may automatically turn-on in order to assess
whether the temporary condition has changed. If the condition is still detected, the DAS
shall shutdown again. These actions will be repeated 5 times
After 5time repetition, if the condition is still detected, the DAS will be shutdown
permanently. The following diagram shows the shutdown logic
After the retry logic exhausts itself, if the DAS still detected a fault status then the DAS
will shutdown permanently and illuminate the fault via visual fault indicator
Permanent shutdowns of the DAS will also be reported to the NOC through the NMS
7.2 Total Power Limit function (TX Output ALC)
In order to protect HPA and not to radiate spurious emission, output power don’t
radiate above defined value which operator set in advance. To execute this function,
operator should turn-on the ALC function and set limit level through GUI. If the output
power exceed above the defined value, output attenuator is adjusted to operate within
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defined value. The output attenuator’s adjustment range is above 25dB. If output power
decease, applied ATT by AGC function return to initial ATT
7.3 Output power automatic setting function (TX Output AGC)
To provide convenience of setting output power at initial setup automatically, operator
set to wanting output level and turn-on the AGC function and then output power is
automatically set to defined level.
If AGC logic finished, logic operation results show on the result window of GUI. There
are three types of results as follows
1. Success: The AGS function is normally completed.
2. Not Opterate OPTIC Comp: Optic Comp is not executed.
3. Lack of ATT: There is no attenuation available.
If normal logic don’t executed, changed ATT return to initial ATT
Through output AGC function, can be checked whether optic compensation is executed
or not
7.4 Input power AGC function (TX Input AGC)
This function is to give convenience to operator when setting intial installation
Without spectrum analyzer, we can know input power value through power display
window of GUI. Use TX IN AGC function and automatically set internal ATT depending
on input level. ATT is automatically set based on -20dBm of input . The table below
shows TX IN ATT depending on TX IN POWER. For manual setting, you can set ATT
depending on input according to the table.
TX IN POWER
TX IN ATT
TX IN POWER
TX IN ATT
TX IN POWER
TX IN ATT
-20dBm
0dB
-9dBm
11dB
+1dBm
21dB
-19dBm
1dB
-8dBm
12dB
+2dBm
22dB
-18dBm
2dB
-7dBm
13dB
+3dBm
23dB
-17dBm
3dB
-6dBm
14dB
+4dBm
24dB
-16dBm
4dB
-5dBm
15dB
+5dBm
25dB
-15dBm
5dB
-4dBm
16dB
+6dBm
26dB
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-14dBm
6dB
-3dBm
17dB
+7dBm
27dB
-13dBm
7dB
-2dBm
18dB
+8dBm
28dB
-12dBm
8dB
-1dBm
19dB
+9dBm
29dB
-11dBm
9dB
0dBm
20dB
+10dBm
30dB
-10dBm
10dB
7.5 Input power limit function (TX Input ALC)
The DAS has TX input ALC function at the BIU to limit level when input power is
increased above level by operated input AGC function
Normally, there are more than two input port in the MDBU of BIU
For example, 850cellular band has two input port to support both VzW and AT&T
Two input power may be different each other. The DAS have input attenuator in first
stage of MDBU. Through input AGC function, input ATT is adjusted according to input
power. If input power increase, input ATT is adjusted again to limit increased input
power. Also, if input power decrease input ATT return to initial ATT
7.6 Optic loss compensation
The DAS has the function of automatically compensating for optical loss. It can do the
work for up to 5dBo of optical loss. Set “TX OPTIC COMP” of ROU as "ON." Optical
compensation of ROU can not be made without communication with such units in
upper level as ODU or OEU. For 1dBo of optical loss, basic TX OPTIC ATT is 12dB; for
5dBo of optical loss, TX OPTIC ATT is 4dB. OPTIC COMP works only one time before
it stays dormant.
The figure below shows a screen for OPTIC Information in ROU GUI.
LD POWER means output level of ROU Laser Diode, which is sent to a upper unit by
ROU. PD POWER means input level of Photo Diode to be received from a upper unit.
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During optical compensation, the Result window shows "Processing" and then a result
value. There are three types of results as follows:
1. Success: The optical compensation is normally competed
2. Over Optic Loss: Generated optical loss exceed 5dBo or more.
3. Communication Fail: Communication with ROU is under poor condition.
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