JDTECK JD60-8-AWS-LC Wireless Cellular Repeater User Manual

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Abbreviations…………………………………………..………………………………..2
Terminology
Meaning
Safety……………………………………………………………………….……………….2
AGC
BTS
CDMA
dB
DL
Donor
GSM
iDEN
LCD
LED
LTE
MS
PCS
RF
UL
Automatic Gain Control
Base Transmitting Station (Cell Tower)
Code Division Multiple Access
Decibel – (A unit of measure for signal strength)
Downlink (Communication channel from cell tower to mobile device)
Outdoor Antenna (Antenna that donates an input signal)
Global System for Mobile Communications
Integrated Digital Enhanced Network
Liquid Crystal Display
Light Emitting Diode
Long Term Evolution
Mobile Station
Personal Communication System
Radio Frequency
Uplink (Communication channel from mobile device to cell tower)
1. Preface………………………………………………………………………………... 3
2. Introduction / Features & Functions……………………………………..5
3. Installation…………………………………………………………………………….7
3.1 Installation Procedure………………………………………...………………8
3.1 Installation Procedure – Con’t……………………………………………9
3.2 Antenna Installing and Cable Wiring………………………..………10
3.3 Manual Gain Adjustment - UL / DL……………………..……………11
User Warnings – MUST READ!
3.5 Trouble Shooting………………………………………………..…………….16
1. This repeater must ONLY be used for the purpose it was
intended for. Making any alternations to the design layout
without first consulting with a trained technician can result in
interference to the operator’s network and liability by the end
user.
Specifications……………………………………………………………………..…..17
2. Please read this entire manual carefully before using this product!
3.4 Testing……………………………………………………………………….……..15
FCC Statement………………………………………………………...……….……18
Repeater Settings….………………………………………………...…………..…18
3. Only the power supply that came with the repeater should be
used at all times. It is highly recommended that the repeater
is grounded and lightning protection used.
4. Do not attempt to open any part of the repeater. This will void
the warranty and can cause an electric shock. Electrostatic
can also cause damage to the internal components.
5. Please keep away from any heating-equipment, because the
repeater will dissipate heat when working. Do not cover the
repeater with anything that influences heat-dissipation.
6. Do not place or mount the repeater in a location that is exposed
to the elements. This will void the warranty and can cause an
electric shock.
1
1. Preface
Nowadays, personall mobile communica
ation is developing at
a a very rapid
ra
ate and persons are
e having higher expectations and dema
ands on the
mobile communicatio
on network. A high-s
speed and high-cap
pacity
ccommunication netw
work has become the
e trend of future dev
velopment. At
present second-gene
eration (2G) mobile communication sys
stems like GSM is
widely used all over the world, but mosttly in developing nattions, whereas
th
hird-generation (3G) and forth-generation (4G) mobile com
mmunication
te
echnology is widely used in Europe, No
orth America and Ko
orea.
For example, Code Division
Multiple Ac
ccess (CDMA) techn
nology is used
which greatly extend
ds the signal width -- the so-called spre
ead spectrum
modulation. As an ad
dvanced wireless co
ommunication techn
nology, it features
good multi-channel access
capability, anti-multipath fading capacity, antin
narrowband interfere
ence capability and security protection capabilities.
The CDMA network has, what is called a “cell breathing efffect”. That is, the
ccoverage will gradua
ally shrink as the cell load increases. Th
he cell breathing
effect makes networrk planning more complicated. The CDM
MA technology
ittself determines that the load of the nettwork at the early sttage of
cconstruction should be higher than that of the GSM networrk. Therefore,
adding carriers and roaming
agreementts between them is a major means of
expanding network capacity,
and adding
g BTS’s or Node B base
stations is
an auxiliary means of
o capacity expansio
on. The aim of the ra
adio network
should to provide continuous coverage, instead of hotspot coverage.
In such a background, JDT
TECK has successfu
ully developed adva
anced
ers that are applicab
ble to any mobile ne
etwork and indoor diistributed
repeate
antenna
a system. (DAS) Re
epeaters are availab
ble to support any te
echnology
or frequ
uency used today.
se a large amount off BTS or Node B de
evices are deployed
d in densely
Becaus
populatted urban areas, the
ere is usually no larg
ge blind area. Repe
eaters are
simply used
to cover small blind areas and pro
ovide signal coverage inside
building
gs or sub-ground loc
cations. Typically, ra
adio frequency (RF)) repeaters
are use
ed when optical fiberrs are not available in buildings or when using a
fiber so
olution is not cost efffective.
Since th
he number of repea
aters on a cellular ne
etwork usually incre
eases with
the num
mber of buildings to be covered in a spe
ecific sector, multiple repeaters
may end up feeding from one
o BTS or Node B.. In view of this, only
y low
ed repeaters (below 1 W) should be dep
ployed in densely po
opulated
powere
areas.
Repeaters adopt an integra
ated module concep
pt. It is compact in structure
and com
mbines the RF module and the monitorring mode in one un
nit. Owing to
its high selectivity, stability and reliability, repe
eaters are widely applied to
indoor signal
distribution in
n small areas such as
a office buildings, meeting
rooms, hotels, tea shops, night
clubs, and cafe
es where signals arre shielded.
er shadow areas ou
utdoors. Such repea
aters are
They arre also used to cove
very suitable to signal optim
mization in densely populated urban arreas.
The cost of wireless repeaters are relatiively low and the co
onstruction is
simple. They have th
he functions of a mini BTS or Node B. On
O the network,
re
epeaters can help a BTS or Node B to achieve the optima
al network quality
at a minimum cost.
A cellular tower typic
cally supports a larg
ge capacity of users but is affected by
a relatively small cov
verage footprint. Therefore, the number of users who can
access it is limited and a large amount of
o channel resource
es are wasted. The
best way of solving this
problem is to us
se repeaters to exte
end the BTS
ccoverage to fully utiliize the telecommun
nication resources. For
F example, in
ccellular network cons
struction in Asia, rep
peaters are no long
ger considered as
peripheral devices to
o cover blind areas in the network but as
a part of the core
network itself.
The complete covera
age is not only a pre
erequisite for a high
h quality mobile
ccellular network, but also a factor that attracts users. From this point of view,
a network operator should
first considerr providing a radio network
with a
ccomplete coverage. The seamless cove
erage in urban areas
s, heavy traffic
areas, office building
gs, super markets, and
a top grade hotels
s is the first step
to
o consummate the network.
Figure 1 sh
hows the applications of the repeaters.
2. Introduction
This full duplex mobile communications repeater from JDTECK is perfect
for providing a wireless improvement in the cellular reception inside a large
office building, under-ground parking lot, warehouse, apartment building,
shopping mall or any other large coverage area requirement.
It is designed to improve the call quality of an area by receiving, amplifying,
filtering and re-transmitting the signals from the base station into a specified
area via a distributed antenna system (DAS) or distributed antenna grid.
To maintain safe and specific output signal levels, this repeater has built-in
signal oscillation detection circuits with color changing LEDs to indicate its
environmental status. The Alarm LEDs located on the front of the unit
(Downlink Alarm & Uplink Alarm) will change color from green to amber or
red, (depending on the intensity) if the system detects signal oscillation in
either band, or if the input signal is beyond a safe limit so as to avoid
interference to the cellular network, the repeater will indicated this.
This repeater also has an automatic gain control (AGC) feature which will
reduce the output power of the repeater if oscillation is detected. This range
can vary from 15-20dB depending on the model of your repeater. If the
reduction in gain needed to take the unit out of alarm exceeds the range of
the AGC, then the end user can make use of yet another feature of this
repeater called manual gain control (MGC). This allows the end user to
further reduce the output gain of the repeater by using the push buttons on
the front of the unit to navigate through the liquid crystal display (LCD) and
manually attenuate (reduce) the repeater’s output gain of either the uplink or
downlink individually.
JDTECK’s repeaters also feature a Network Safe / MUTE feature that
automatically shuts-down the transmission side of the repeater to protect the
cellular network if no adjustments are made to eliminate alarm readings on
the repeater’s LEDs. You will want to make sure the LEDs remain green at
all times for optimum system performance.
Features & Functions










Sleek attractive housing.
LED indicators to monitor environmental status.
Supports all technologies including GPRS, GSM, CDMA, UMTS & LTE
Low power consumption.
ALC function. (Auto Limit Control – will not exceed max rated power)
AGC function. (Automatic Gain Control)
MGC function. (Manual Gain Control)
MUTE function. (Shuts down if no change in environmental conditions)
LCD Interface. (User Friendly Digital Interface)
Heat Sink cooling fins to dissipate heat quickly and efficiently
Grounding Stud
Indoor Port
Outdoor Port
Power Switch
DC Power Plug
UL Alarm
DL Alarm
Up / Down Button
Enter Buttons
LCD Screen
Heat Sink Fins
The main cause of signal oscillation is when any of the indoor antennas are
too close in proximity to the outdoor antenna on the roof.
Alarm LED status chart and recommended action:
Green - System functioning well.
Amber - Mild detection of oscillation.
Red - Strong signal oscillation.
Off – Repeater is not transmitting (MUTE Activated)
3. Installation
3.1 Installation Procedure
1. The repeater’s main function is to improve weak RF signals to an area.
2. Selecting the appropriate accessories that are compatible with the
frequency of the repeater is very important for optimal system
performance. An 850Mhz Repeater needs to be used with accessories
that supports the 850Mhz band. In the same way, choosing accessories in
the 1900Mhz Band needs to go with a 1900Mhz Repeater etc. For dual
band or multi-band repeaters, please ensure the peripheral components
used supports all the frequencies needed.
3. The signal strength from the outdoor antenna directly affects the efficiency
of the indoor coverage. Therefore it is very important to choose the
location of the outdoor antenna carefully. With this in mind, it is not
recommended that the donor antenna be installed in an attic or at the side
of a building.
4. The repeater is a two-way (full duplex) signal amplifier. Therefore there
needs to be proper isolation between the outdoor antenna and indoor
antenna in order to avoid signal oscillation on the repeater. (Interference)
There needs to be more than 15dB of isolation above the repeater gain.
For example, if the repeater gain is 60dB, then you need 75dB of isolation
between outdoor antenna and indoor antenna.
5. The repeater gain is adjustable for both the uplink / downlink individually.
Depending on the environment, the end-user may need to adjust the
repeater gain to achieve optimum performance and desired coverage.
Site Survey
Installation Planning
Link Budget Calculating
Install Outdoor Antenna
Cable Installation
Install Repeater
Install Indoor Antennas
6. The repeater is designed to amplify the input signal, filter it and retransmit
it to the desired area via service antennas. In order to reach the best
performance, the outdoor signal should be greater than -80dBm, and not
over +10dBm. If the outdoor signal is very weak, then a pre-amplifier may
be used.
7. Calculating the Link budget before setting the repeater gain.
Signal Measurement
Gain Adjustment
Link budget calculation:
Test for Call Quality
Outdoor signal strength – Loss of accessories (cable, connectors,
splitters, Directional Couplers) + Antenna gain (outdoor antenna, indoor
antenna) + Repeater gain = Indoor signal strength.
8.
For all cellular applications, you need to use 50 Ohm rated coax.
Besides affecting voice quality, using any other impedance of coax will
put an extra load on your repeater and shorten its life span.
Trouble Shooting
3
3.1 Installation Procedure
– Co
ont.

Check the conte
ents supplied.

Identify a suitab
ble location where yo
ou would like to mount the donor
antenna on your roof or at an eleva
ated location, free off any other
antennas or imm
mediate obstructions
s. Confirm this location has the best
input signal from
m the cell tower or to
owers you would lik
ke to support.

Ensure the location is properly isola
ated from the indoor antenna
and at the same
e time, ensure the cable
length supplied
d is sufficient to
complete your in
nstallation.

Install the donorr antenna and route
e the coax to the pro
oposed location for
the indoor base unit. DO NOT COIL UP any excess coax
you may have,
including any se
ervice loops.

Connect the ind
door service antenna
as, coax and powerr supply. Power up
the unit and monitor the LED status
s for errors.

If the donor ante
enna used is not an
n omni-directional an
ntenna or the
nearest cell tow
wer location is not kn
nown at the time of system
commissioning, then you may need
d to rotate the donor antenna until the
best signal stren
ngth or call quality is
s achieved on your mobile device,
while making su
ure the LEDs stay green on the repeate
er.
3.2 An
ntenna Installattion and Coax Cable
Wiring
We do not
n recommend insttalling the donor antenna of your repea
ater system
in the attic or at the side off a single story build
ding. Doing so will re
educe the
o the input signal frrom the cell tower. Also
you increase th
he risk of
quality of
signal oscillation
taking pla
ace, thus having to attenuate
the outputt power of
your rep
peater.
 D
Do not install the do
onor antenna near high
voltage power lines.
 Please
take the nec
cessary safety meas
sures when working
g on heights.
 Do
D not mount near or
o in the path of other antennas or sate
ellite dishes.
We suggest getting someone
to help ro
otate the donor anten
nna while you
monitor both your mobile device (Phone
e or PC Card) and th
he LEDs on the
re
epeater at the same
e time.


If signal oscillatiion is between 1~4d
dB then the Alarm LED
for the
relevant band will
w turn amber. Please adjust the DL repeater gain till the
LEDs turn green
n. (See attenuation adjustment)
If the signal osc
cillation is between 10-15dB then the Alarm
LED for the
relevant band will
w turn red, and the
e repeater will then shut down. This is
as a result of not having enoug
gh isolation betwee
en the donor and
service antenna
as. In this case atttenuate the DL gain on the repeater
and then match
h the UL gain to the same gain value. (See attenuation
settings for adju
ustments)
It is
s recommended tha
at you mount your donor antenna in a spot
that is
free
e of any immediate obstructions. Makin
ng use of a pole or mounting
bra
acket is recommend
ded for optimum anttenna performance.
10
3 Manual Gain
3.3
n Adjustment ~ UL / DL
3.3 Ma
anual Gain Adju
ustment ~ UL / DL – Con’t.
In
n order to meet an
nd maintain safe en
nvironmental condittions for seamless
network integration, this repeater is equipped
with an LCD
interface that
allows you to manua
ally control the Uplin
nk / Downlink gain in
ndividually. The UL
/ DL attenuator contrrol range is from 0dB to -31dB by 1dB increments.
Click the ENTER button ag
gain after you have selected the desired
d band you
would liike to attenuate. This will then bring your prompt to the currrent
attenua
ation value. (Default is 0dB) You can th
hen use either the UP
U or
DOWN navigation buttons to add the desired amount of attenuatiion.
When your repeaterr is switched on, the
e LCD screen will display
the current
UL and DL gain values and output powe
er setting in a scrolling sequence.
U Navigation Button
Up
Active Power Sta
atus Scrolling
Up Naviigation Button
Return Button
Down Navigation
Button
The default of UL
L/DL gain
attenuator is at 0dB. (Full Power)
T following examp
The
ple shows a value of
o 2dB has been sele
ected.
Do
own Navigation Button
Enter / Select Button
Click the ENTER button to access the menu to add or rem
move attenuation.
Plea
ase note: For the se
elected value to take
e effect, you must press
the
ENTE
ER button after, or itt will not register. Yo
ou will then get a co
onfirmation
response when the change was
w successful.
Do
own Navigation Button
Click the UP or DO
OWN navigation buttton to access the desired
band you
would like to attenuate. (U
UPLINK or DOWNLINK)
11
12
3
3.3 Manual Gain
n Adjustment ~ UL / DL – Con’’t.
3.3 Ma
anual Gain Adju
ustment ~ UL / DL – Con’t.
After the change ha
as been made, monitor the DL alarm LED to see if it’s
green or if further atttenuation is needed
d. If the DL LED rem
mains a solid green,
th
hen be sure to matc
ch the UL gain to the
e same dB value.
In
n some deploymentts, the end user may decide to have a stronger UL gain if
th
he location of the re
epeater is very far from
the cell tower. In this instance, it
would be best not to
o exceed a 5dB diffference on the DL gain as this could
affect the optimum
m performance of the repeater’s ba
andwidth capacity.
Avoid putting more than a 5dB diffe
erence between the Up
plink and Downlink.
Re
epeater not receiving a go
ood input signal.
Main Menu
When do you adjust th
he Repeater Gain
n?
When in the main menu,
if you continu
ue to scroll down the LCD will display
options 3 & 4. When
n selected, option 3 will allow you rese
et the dB values to
fa
actory default. (No Attenuation
= Full Power).
Option 4 simply allow
ws you to exit the main
menu back to th
he home screen.
This rep
peater is equipped with
w an alarm featurre that monitors the
e input gain.
If the input gain is too high, the DL Alarm LED will change color frrom green
to eithe
er, amber or red indicating the intensity or the error. High in
nput gain
can occ
cur if the donor ante
enna is in a location where the receive signal
strength
h (RSSI) from the ce
ell tower is extreme
ely good (-50dB or better)
or if
signal oscillation
is taking place.
Signal Oscilla
ation is when the am
mplified
signal frrom the indoor serv
vice antenna is being received back into
o the donor
antenna
a outside.
ermine what is the ca
ause of your Alarm LED changing color you can
To dete
disconn
nect the indoor ante
enna / service line from the “INDOOR” port
p of the
repeate
er. If the LED does not
n change to green
n, then your input sig
gnal from
the cell tower is very strong
g and it is highly rec
commended you atttenuate the
n by 1dB increments
s till the LEDs turns green again. Then you must
DL gain
match the
t same attenuatio
on value to the UL, after
which you can connect the
indoor antenna
/ service lin
ne again.
Down Navigation Butto
on
Click the
t ENTER button to access any selection.
Output Power
Another neat featurre about the LCD Interface on this repeater
is that in
addition to the currrent UL and DL ga
ain values that scrrolls on the home
screen, it also displa
ays the active outpu
ut power level of the
e unit. This can be
used as an indicattor to determine how strong an inpu
ut signal is being
re
eceived by the repe
eater. For example if the input signal is
s weak, the output
power will display “O
Output Power = Low”.
If your donorr antenna is in the
best location for receiving a good inputt signal and the Output Power is still
Low, then it could be
e that you either ha
ave a compromised connector on your
in
nput coax cable, or that you need to add
a a pre-amp to th
he system to boost
th
he weak input signa
al.
13
the ind
door antenna or serrvice line, the LED changes
If after reconnecting
back to amber or red then signal oscillation is taking place. This is
s the result
or antennas being too close to each oth
her and
of your indoor and outdoo
should therefore have more separation.
When complete,
try makin
ng some test calls throughout the des
sired area of
coverag
ge while monitoring
g the LEDs to see if it changes colorr. If you are
showing
g strong signal stre
ength but your calls are not going throu
ugh, it could
be that you need to atten
nuate your uplink gain
a bit more. Ke
eep in mind
howeve
er that you do not want
to have more than a 5dB differen
nce between
the uplink and downlink values for optimum sy
ystem performance..
courage you to call us
u when commissio
oning your repeater system to
We enc
make sure you have seamless integration to the cellular network.. We are
always happy to help. 1-86
66-4-JDTECK (53-8
8325).
14
3
3.4 Testing
3.5 Troubleshooting
Q1. Wh
hy is there still no signal
after installing the equipmentt?
Answer:
1. Chec
ck the power on rep
peater and power su
upply.
2. Chec
ck the connector of outdoor antenna is tight or not.
3. Chec
ck the connectors off RF cable are tight or not.
4. Chec
ck the outdoor signa
al is strong enough or not.
5. Chec
ck to make sure the antenna is installed
d correctly.
6. Chec
ck the connector of indoor antenna is tight or not.
7. Chec
ck the cable type is suitable or not.
Q2. Wh
hy the signal strength is too weak on
n the edge of area?
Answer:
1. Chec
ck the outdoor signa
al and antenna direc
ction.
2. Chec
ck repeater is full ga
ain or not.
3. Chec
ck all of the connecttors are tight.
4. Chan
nge the location of outdoor/indoor
anten
nna.
5. Chec
ck the cable type is suitable or not.
6. Deplo
oy more indoor ante
ennas.
Q3. Wh
hy can’t I make a call after installation, even though I can
dettect a signal?
Answer:
1. Chec
ck LED status of rep
peater to make sure
e alarms are green.
2. Chan
nge the location of outdoor
/ indoor ante
enna.
3. Redu
uce the UL gain of th
he repeater.
Q4. The
e signal is not stab
ble after turning on
n the repeater pow
wer.
Answer:
1. Chec
ck to see if the outdo
oor signal is stable or not.
2. Chec
ck the location of the
e donor antenna. To
oo close to other an
ntennas.
3. Chec
ck the RF cable is broken or not and ha
as no coils.
4. Conffirm direction of donor antenna in relatio
on to cell tower.
Q5. Wh
hy is the LED on th
he front of the repe
eater not lit?
Answer:
1. Chec
ck the power source
e is normal or not.
2. MUT
TE feature is active. Attenuate gain of re
epeater and cycle power.
15
16
FCC Statement
Mechanical Specifications
Input / Output Port
Impedance
Dimensions (W x D x H)
Weight
Operating Temperature
Environment Conditions
Switching Adapter
N-Female
50 Ω
250 x 220 x 53mm
≤3.2Kg (7.1Lbs)
-10°C ~ 50°C
IP40
Input AC 100~240V, Output DC 12V / 5A
Frequency Specifications
Model
FCC ID
Filter Bandwidth
WCDMA
Total output
power
CDMA
Max. Gain
Gain Flatness
AGC Range
Maximum Input Power
Gain Control Range(MGC)
V.S.W.R
Spurious Emission
Spurious Emission Mask
Modulation Accuracy
Peak Code Domain Error
Frequency Stability
ACPR
Noise Figure (@ max gain)
Group Delay
JD60-8-AWS-LC
SQX-JD60-8-AWS-LC
AWS 45MHz
Downlink : 29±1dBm /Uplink: 20±1dBm
Downlink : 29±1dBm /Uplink: 20±1dBm
Downlink:80dB/Uplink :75dB
AWS ≤6dB
≧15dB ，auto shut off after 15dB
0dBm
≥31dB in step of 1dB by LCD menu
≤2
9KHz~1GHz≤-36dBm
1GHz~12.75GHz≤-30dBm
Complies with 3GPP TS 25.106
Complies with 3GPP TS 25.106
Complies with 3GPP TS 25.106
≤0.01ppm
≥30dB ＠±5MHz＆±10MHz
≤6dB
≤4.5 micro Sec
Changes or modifications not expressly approved by the party responsible
for compliance could void the user's authority to operate the equipment.
PLEASE NOTE: It is normal for your repeater to be quite warm while in use.
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment . This equipment should be installed and operated
with minimum distance 20cm between the radiator& your body. This
transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter.
Record your repeater settings here.
Downlink
Dip Switch
Value
Uplink
Dip Switch
Value
1dB
1dB
2dB
2dB
4dB
4dB
8dB
8dB
16dB
16dB
Total dB Attenuated
ON
…………...
Total dB Attenuated
Adjusted By: ___________________________________
Date:
ON
…………...
……./……/…………
Model Specifications
Classification
A. Frequency Range
(AWS)
1700 / 2100Mhz
Bandwidth Range
DL- 2110-2155 (MHz)
UL -1710-1755 (MHz)
18
____________
____________
17
____________

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User Access                     : Print, Extract, Print high-res
Page Count                      : 9
XMP Toolkit                     : XMP toolkit 2.9.1-13, framework 1.6
About                           : uuid:27e27cf8-056d-4c36-a573-a78c3b10941f
Producer                        : Acrobat Distiller 9.0.0 (Windows)
Create Date                     : 2012:02:16 18:45:14+08:00
Creator Tool                    : PScript5.dll Version 5.2.2
Modify Date                     : 2012:02:16 09:30:47-08:00
Metadata Date                   : 2012:02:16 09:30:47-08:00
Document ID                     : uuid:d68c2cde-3ea6-4f20-a959-d1994b910395
Instance ID                     : uuid:487631e5-e86b-448f-b000-632545dd1fa8
Format                          : application/pdf
Title                           : Microsoft Word - JD60-8-LC Repeater User Manual - 2011.docx
Creator                         : a
Author                          : a

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