GS Instech GRS-1923DC-SPR Repeater User Manual

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Sprint User Manual
3G Indoor Repeater
3G Indoor Repeater
GRS-1923D-SPR
User Manual
January, 2009
Version 0.1
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Sprint User Manual
3G Indoor Repeater
- INDEX 1. SUMMARY................................................................................... 3
2. SYSTEM CONFIGURATION ......................................................... 4
2.1 GSR-1923D-SPR Service Organization ...................................................... 4
2.2 System Design and Operation.................................................................... 5
3. SPECIFICATIONS ..................................................................... 11
3.1 System Specifications(Applicable to both Uplink & Downlink)................ 11
3.2 Electrical and Environmental Specifications ............................................ 12
3.3 Functions ................................................................................................. 12
4. SET UP ...................................................................................... 15
4.1 System Set up .......................................................................................... 15
4.2 Troubleshooting....................................................................................... 19
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1. SUMMARY
GRS-1923D-SPR is an analog RF repeater, which improves PCS network.
GRS-1923D-SPR receives RF signal from BTS and transmits it to the blanked and shadowed
area, thus providing and improving voice and image data services. GRS-1923D-SPR’s goal is to
support BTS’s functions proportionately.
GRS-1923D-SPR communicates with BTS wirelessly, thus saving additional costs for its
maintenance.
GRS-1923D-SPR consists of RF/IF part module, Digital Filter module, and I/O & Control module
divisions, which are supplied with Alarm LED, thus providing quick and easy maintenance and
troubleshooting of the repeater.
This manual describes in general structure of GRS-1923D-SPR, its application, maintenance and
troubleshooting, installation and operation etc.
-.Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void
your authority to operate this
equipment.
-.Warning: Exposure to Radio Frequency Radiation The radiated output power of this device is far below
the FCC radio frequency exposure limits. Nevertheless, the device should be used in such a manner that
the potential for human contact during normal operation is minimized.
In order to avoid the possibility of exceeding the FCC radio frequency exposure limits, human proximity
to the antenna should not be less than 20cm during normal operation. The gain of the
antenna for pcs Band must not exceed 12 dBi.
Abbreviation
PCS : Personal Communication System
RF: Radio Frequency
BTS: Base Transceiver Station
IF: Intermediate Frequency
I/O : Input/Output
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2. System Configuration
2.1 GRS-1923D-SPR Service Organization
GRS-1923D-SPR decreases blanked and shadowed areas and extends cell coverage by re-trans
mitting signal. The signal is received from BTS via Antenna directly, thus excluding additional ex
penses for signal transmission (like cabling). Service organization of CDMA In-building RF repeat
er is shown at the picture below. Donor Antenna is directed to BTS, and being divided at Servic
e Antennas are installed in the building and parking place. Pass Loss should be taken into consi
deration while dividing and cabling.
 US PCS 1900 Service Organization
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2.2 System Design and Operation
2.2.1 System Design
 GRS-1923D-SPR Repeater
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 Internal Design
NO
DESCRIPTION
①
ANTENNA PORT
②
PSU MODULE (RS-35-3.3)
③
PSU MODULE (RS-100-9)
④
CONVERTER MODULE
⑤
AMP MODULE
⑥
NMS BOARD
⑦
DIGITAL FILTER
⑧
ETHERNET BOARD
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 Outside Port Design
NO
DESCRIPTION
①
SERVER ANT PORT
②
DONOR ANT PORT
③
AC POWER PORT
④
CLI MONITOR PORT
⑤
ETHERNET PORT
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2.2.2 Downlink Path
Downlink and Uplink Gain Budgets have similar structure.
In case of Downlink Path, RF signal is received from Donor Antenna, and through FWD LNA
division, then the signal is transferred to IF division, where desirable Band is selected by Digital
Filter. Selected Band is transferred to RF division again, and through FWD PAM, after that the
signal is transmitted to User through Server Antenna.
Two attenuators use for ALC and NF compensation. ALC attenuation range is 20dB, and NF atte
nuation range is 10dB in Digital Step Attenuator.
 Downlink Block Diagram
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2.2.3 Uplink Path
Uplink Path is similar in structure to Downlink Path.
In case of Downlink Path, RF signal is received from Server Antenna, and through RVS LNA
division, then the signal is transferred to IF division, where desirable Band is selected by Digital
Filter. Selected Band is transferred to RF division again, and through RVS PAM, after that the
signal is transmitted to BTS through Donor Antenna.
Two attenuators use for ALC and NF compensation. ALC attenuation range is 20dB, and NF atte
nuation range is 10dB in Digital Step Attenuator.
 Uplink Block Diagram
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2.2.4 US PCS Frequency Selection
 1900MHz PCS Band Structure
GRS-1923D-SPR has 5MHz, 10MHz, 15MHz, 20MHz Paths in IF division, so any of these bandwi
dths can be chosen for providing service.
ITEM
BANDWIDTH
NOTE
5MHz
10MHz
15MHz
Band Select
20MHz
Any of these bandwidths from
5MHz + 5MHz
A to E can be chosen
5MHz + 5MHz + 5MHz
10MHz + 5MHz
15MHz + 5MHz
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3. SPECIFICATIONS
3.1 System Specifications(Applicable to both Uplink & Downlink)
ITEM
SPECIFICATION
Transmit Power
23dBm ± 2.0dBm
Frequency
Downlink
1930MHz ~ 1975MHz
Range
Uplink
1850MHz ~ 1895MHz
REMARK
Gain Range
60dB ~ 80dB
DL/UL both
Roll Off
≥ 50dBc
@ F(edge)±1MHz
VSWR
1.5 : 1
Delay
8us
In Band
Spurious
Emission
Fc±885kHz
Out band
Spurious
Emission
Fc±885kHz
Fc±1.98MHz
Fc±2.25MHz
Flatness
≥ 45dBc
marker to marker 29dB
≥ -45dBc
marker to marker 29dB
≥ -55dBc
marker to marker 39dB
< -13dBm
RBW = 1MHz
3.0dB
channel power
measurement
5MHz
Band Select
5+5MHz or 10MHz
Non-contiguous Band
5+5+5MHz or 10+5MHz or 15MHz
(Maximum 3-band)
15+5MHz or 20MHz
Noise Figure
5dB @ Max Gain
12dB @ Min Gain
ALC Range
20dB, 1dB step
Frequency Stability
±0.05ppm
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Waveform Quality Factor
> 0.97
Output Power Variation
±2.0dB
over Temperature
3.2 Electrical and Environmental Specifications
ITEM
SPECIFICATION
Power & Consumption
100 ~ 240 VAC,60Hz
Connector Type
N-type female
Size
340X300X170
Weight
max 40 lbs
Reliability, MTBF
50,000 hours
Enclosure
NEMA4
Operating Temperature
-10℃ ~ +50℃
Rel. Humidity
0% ~ 90%
REMARK
TIA-97, TIA-98, IS-98D,
Industry Standards
IS-2000
Regulatory Approvals
FCC, Part24 CDN-IC
Safety Approvals
UL1950 or Equiv
3.3 Functions
ITEM
Gain Control
FUNCTIONS
• Adjustable DL and UL Gain range 60~80dB
• Display default Gain and current Gain function
• It always operates in Downlink AGC ON status
AGC
(Auto Gain Control)
• To maintain same Downlink output power despite flexible input signal
strength
• To add or subtract Attenuation level referring to AGC Power Limit level.
• Used with the Automatic Setup (Auto Gain Setting)
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• To limit output power as far as default range
• Used for DAS configuration and when oscillation/isolation is a concern
• Automatic Gain decrement when output power of repeater is higher
ALC
(Auto Level Control)
than default level
• Automatic Gain recovery when output power of repeater is reduced
• Shutdown when output power is higher than default level in Minimum
Gain
• Automatic Recovery Algorithm conversion after Shutdown status
• Operate when User control (Only system initialize)
• Decrease attenuator value for 3dB from minimum gain
• In case of attenuator value is from 0dB to 3dB when AGS ended
- AGC on (DL)
- Gain balance on
AGS
(Auto Gain Setting)
- PAM on
- Shut down on
• In case of attenuator value is over 3dB when AGS ended
- AGC off (ALC on)
- Gain balance on
- PAM on
- Shutdown on
• Downlink ATT is applied to Uplink during AGC state
Gain Balance
• Setting and maintenance of output level
• Additional attenuation to ALC Level
Band Select
Power Monitoring
Function
DL Input control
Automatic Recovery
Security
• To select either 5MHz/10MHz/15MHz/20MHz
• Monitoring repeater’s output level
• Monitoring Donor ANT input power of DL
• When repeater is shutdown, it periodically recovers output power of
repeater then monitors alarming
• Support HTTPS for Web Browser security
• User authentication through User ID and Password
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• Monitoring temperature of repeater
Temperature
Monitoring
• Maximum and minimum set up is possible
• Shutdown in over temperature
• Automatic recovery after temperature becomes normal (Hysteresis 10
degree)
VSWR Monitoring
IP address report via
E-mail
• Monitoring VSWR of Donor ANT Port (Every one and half minute)
• Reporting VSWR Alarm and Shutdown when the rate is 3.5:1
• When in PPP reconnection, E-mail which includes HTML to connect to
newly assigned IP Address, reports to operator.
DHCP Client
• Automatic IP assignment
DHCP Server
• Server function for automatic IP assignment
Web GUI
SNMP Agent
• Remote and local user browser support through Web Browser
• NMS report via SNMPv2 Trap
• LED displays power and operation status on front side of repeater
LED Display
system
• Input and Output signal levels are verified by LED bars
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4. SET UP
4.1 System Set up
4.1.1 Constitution (Based on 1 set)
PARAMETER
ITEM
QUANTITY
Major Accessory
US PCS 23dBm case
1 EA
Main power input cable
1 EA
Fixable screw
1 SET
Mountable brackets
1 EA
Manual
1 EA
Additional Components
User Manual
4.1.2 Notice
1) System Power check: Major electricity is AC110V, therefore please input electricity after
power verification.
2) Input condition optimization: DL input condition is -57 ~ -37dBm. User should verify
input condition of Donor ANT.
3) Isolation check between DONOR/SERVICE ANT: Isolation condition of this equipment
is 87dBc (Gain+7dB). User should check its condition before installation.
 MS 3100 A 10SL-3 (Wall Mount Receptacle) & MS3010 A 10SL-3(Plug)
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4.1.3 System Set up
1) This equipment is basically wall mountable installation.
2) Once aforementioned process is done, open for service get ready.
3) For grounding, there is a grounding terminal in main power supply side and the grounding
terminal on a site and unit should be connected same.
4) System installation work is basically performed more than two people and should be careful
for unexpected accident.
 Case Mounts - Step 1
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 Case Mounts - Step 2
4.1.4 Open for Service
1) Check points before open
a. Verification of system installation status
- Electricity, In/out antenna, coaxial cable connection, equipment mounts status.
b. Verification of system accessories
- User should check whole necessary accessories.
c. Check receipt signal level
- User should check whether receipt environmental condition is in accordance with system
specification, so that system operation will be optimized.
2) Check points after open
a. Check by external LED
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① RUN: Green light ON (Off: Green light off)
② ALARM: Green light in normal status, Red light in alarming
③ SHUT DOWN: Green light in normal status, Red light in Shutdown status
④ Number of LED bar on front side of repeater will show input power signal level
Less than -86dBm: LED 1 bar
-85dBm ~ -70dBm: LED 2 bar
-69dBm ~ -54dBm: LED 3 bar
-53dBm ~ -41dBm: LED 4 bar
More than -40dBm: LED 5 bar
⑤ Number of LED bar on front side of repeater will show output power signal level
Less than +14dBm: LED 1 bar
+15dBm ~ +16dBm: LED 2 bar
+17dBm ~ +18dBm: LED 3 bar
+19dBm ~ +21dBm: LED 4 bar
More than +22dBm: LED 5 bar
 Front LED
b. Verification of operation status
- User should verify following status with Output monitoring terminal, which is provided by
Spectrum Analyzer
- Output power generation status, system spurious emission characteristics.
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c. Verification of signal quality and strength in service area
- User should verify signal strength and quality of in-service coverage area by using cell
phone or other measuring device.
d. Verification of upper-level NMS operation status
4.2 Troubleshooting
In case of abnormal operation, technician should diagnose abnormality via remote access or
directly connecting to repeater using Ethernet cable. If technician is required to conduct repairs
due to major alarm, repeater should first be powered off, and then technician should prepare
the proper measurement equipment before trying to fix the problem. In most cases of major
repairs, GST will simply replace the unit and conduct repairs at the appropriate facility.
4.2.1 Necessary Testing and Measuring Equipment
1) RF Power Meter: 10Watt Max, 50ohm
2) Signal Generator: 3GHz
3) Spectrum Analyzer: 3GHz
4) Multi-Meter
4.2.2 Notice
1) Troubleshooting should be performed by a trained technician.
2) Parts that seem to be not used should not be disassembled.
3) While troubleshooting, technician should use attenuator to check RF Signal output.
4.2.3 Simple Troubleshooting Method
1) Verify LED Status, both on external LED’s as well as internal module LED’s
- Normal operation: Green light on. Alarming: Red LED on.
2) Technician should check external and internal connectors to ensure that all connections are
tightly secure. These connectors should be cleaned regularly.
3) If technician thinks there is a serious problem, call after sales team for over-the-phone
technical support. 1-866-9-GST-USA (1-866-947-8872)
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4.2.4 Troubleshooting Guide
Item
Check Point
System
input
Troubleshooting
power -Downlink: -57dBm ~ -37dBm
range
-Uplink: -57dBm ~ -37dBm
-Downlink: 60dB ~ 80dB
System gain
-Uplink: 60dB ~ 80dB
Check before Output power at server -Downlink: 23dBm ± 2dB
system
port
-Uplink: 23dBm ± 2dB
operation
-Please check quantity of all accessories with
Check points before open
for service
specification before you set up
-Fit cable length in accordance with field condition
-Set up 1900MHz CDMA Donor antenna to secure
Isolation. (More than 87dBc)
Check following status;
-Verify that the antennas are securely mounted
and pointed in the correct directions
Check
after
system
operation
-Connection status between antennas and RF cable
Check points after open
-Verify that the Repeater is securely mounted
for service
-Proper AC power status
-Grounding status of electrical circuit
-Coaxial cable (RF) construction status
-Connectors and combiners connection status
-Cable connection status against leakage of water
4.2.5 Troubleshooting Guide Related to RF
Symptom
Check Point
Troubleshooting
When
repeater
does
work
not
Check
electricity
connection status
cord
-Re-plug in Adapter cord
properly
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Please Check following status;
-Proper maximum output power limit level
-BTS input level (Spectrum Level)
DL over-input alarm
-Input RSSI value on Status Page
-Downlink Attenuation level
Please
reset
Adapter
upon
completing
Alarm
troubleshooting
-Make sure output power is operating normally
DL over-output alarm
-Reset
Adapter
upon
completing
Alarm
troubleshooting
When
alarming
in
-Please make sure output level is operating normally
UL over-output alarm
-Please reset Adapter upon completing Alarm
troubleshooting
Check following status;
-Setting level of maximum temperature limit
-Temperature offset is normal or not
Temperature alarm
-Circumstances of temperature
Reset
Adapter
upon
completing
Alarm
completing
Alarm
troubleshooting
-Verify that the HPA’s are On
RF off
-Reset
Adapter
upon
troubleshooting
When output Technician should verify -When Red light on the Shutdown LED, technician
power is
no category of alarm at the should
longer
front side of repeater
problem
-Technician
connect
troubleshoot
the
alarm
via
Notebook
computer
should
antenna
with
output port of repeater
-Please make sure all
-Reconnect the connector
-Change it if the connector is defective
connectors are fastened
Check the input level
-Increase output power or check input change of
BTS side
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-If the Gain is different from normal level, please
Check gain of the unit
contact A/S team
-It is possible for connectors to get too tight and
damage the equipment or throughput
Cable connector loose
-Please contact installer or service provider upon
verification
Check
input
signal
strength in the service
In
case
of
dropped call
or bad signal
after set up
area
adjusting attenuation level
If input signal strength is
not a problem, please -Increase output level of Uplink signal, then set to
check delay of calling optimal level.
time
Check
RSSI
signal -Contact network management team or service
strength
provider
Check
connection
fastened
between
antenna
In
-Increase output power level of repeater by
and
cable
wavelength -If connection is not proper, reconnect cable and
case (Signal
output Signal should be flat and stable connector and then check the output power again
wavelength is if
not
technicians
shown CABLE.
If
shake
not,
it
is
flat or looks connection problem)
like
oscillation
Input level change or
module overheating
Please check VSWR of
the cable is normal
-Check input level from BTS side.
-Check performance of each module (Diagnosed by
A/S team)
-Change to normal Cable
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4.2.6 Troubleshooting Guide Related to NMS
Symptom
Check Points
Troubleshooting
-In case of Ethernet, verify IP addressing, DHCP
Communication problem
function, and that cookies are deleted
-Verify that a crossover Ethernet cable is being used
Link Fail
CLI
connection,
status check
cable
-Make sure 1:1 connection
-Follow instructions in the installation guide for this
connection procedure
CLI connection Check by -Please verify port number of PC communication
USB to serial cable
-Please check cable connection status
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