GS Instech SMT-A33 CDMA In-Building RF Repeater User Manual

GS Instruments Co., Ltd. CDMA In-Building RF Repeater

User Manual

SmartCell RepeaterUser Manual 33 dBm July, 2012Version 1.0
User Manual SmartCell Repeater 2- INDEX - 1. INTRODUCTION ............................................................................................................. 3 1.1 GST SmartCell Repeater Advantages ........................................................................... 5 1.2 Abbreviation ................................................................................................................. 5 2. SYSTEM CONFIGURATION ............................................................................................. 7 2.1 SmartCell Repeater Service Network Configuration .................................................... 7 2.2 System Design and Operation ...................................................................................... 8 2.2.1 System Design ....................................................................................................... 8 2.2.2 Downlink/ Uplink Path ........................................................................................ 10 2.2.3 700MHz Frequency Selection .............................................................................. 11 2.2.4 850MHz Frequency Selection .............................................................................. 11 2.2.5 1900MHz Frequency Selection ............................................................................ 12 2.2.6 2100MHz Frequency Selection ............................................................................ 13 3. SETUP ........................................................................................................................... 14 3.1 Equipment Needed for Repeater Setup ...................................................................... 14 3.1.1 Check points before turning on the Repeater ...................................................... 14 3.1.2 Ready for Service ................................................................................................. 15 3.1.3 Signal Strength LED Check .................................................................................. 15 3.2 Setting up the Repeater ............................................................................................. 15 3.2.1 Quick GUI/Configuration ..................................................................................... 16 3.2.2 Quick Setup ......................................................................................................... 16 3.3 WebUI Ranges Table .................................................................................................. 16 3.4 Troubleshooting ......................................................................................................... 17 3.4.1 Simple Troubleshooting Method .......................................................................... 17 3.4.2 Alarm Information ............................................................................................... 17 3.4.3 Troubleshooting Guide Related to RF .................................................................. 20 3.4.4 Troubleshooting Guide Related to NMS ............................................................... 22
User Manual SmartCell Repeater 3U.S.A. U.S.FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFERENCE STATEMENT INFORMATION TO THE USER NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular Installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encourage to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet of a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for assistance. Changes or modification not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Connecting of peripherals requires the use of grounded shielded signal cables.
User Manual SmartCell Repeater 4IC Warning This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.
User Manual SmartCell Repeater 51. INTRODUCTION SmartCell is a modular repeater designed to improve signals in blanket/shadow areas inside buildings. It can transmit signals at 700MHz, 850MHz, 1900MHz, and 2100MHz frequencies. User may choose filtering configurations according to the specific site’s requirements. 1.1 GST SmartCell Repeater Advantages  It provides selectable RF power levels for any wireless technology / band.  It provides monitoring for multiple technologies.  Its digital filter provides optimized RF performance.  It allows the users to modify the technologies via a web user interface.  It is easy to add or change frequencies.  It has scalable modular design.  Data service is improved by the addition of 4G (LTE).  Wall mount or rack mountable single chassis design.  AMP modules are interchangeable and hot swappable.  Optional low loss multiplexor allows user a centralized cable connection point for donor and service antennas.  Multiples of same technology amplifiers can be used simultaneously.  A single PSU provides power to the entire system up to 4 amplifier modules. 1.2 Abbreviation DFM Digital Filter Module PSU Power Supply Unit ALC Auto Level Control SNMP Simple Network Management Protocol AOC Auto Oscillation Control
User Manual SmartCell Repeater 6 CAUTION  THIS EQUIPMENT IS INDOOR USE ALL THE COMMUNICATION WIRINGS ARE LIMITED TO INSIDE OF THE BUILDING  RISK OF EXPLOSION IF BATTERY ON CONTROLLER BOARD IS REPLACED WITH AN INCORRECT TYPE.  DISPOES OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.  THE SOCKET-OUTLET SHALL BE INSTALLED NEAR THE EQUIPMENT SHALL BE EASILY ACCESIBLE.  THIS POWER OF THIS SYSTEM SHALL BE SUPPLED THROUGH WIRING INSTALLED IN A NORMAL BUILDING. IF POWERED DIRECTLY FROM THE MAINS DISTRIBUTION SYSTEM, IT SHALL BE USED ADDITIONAL PROTECTION, SUCH AS OVER VOLTAGE PROTECTION DEVICE.
User Manual SmartCell Repeater 72. SYSTEM CONFIGURATION 2.1 SmartCell Repeater Service Network Configuration The SmartCell Modular Repeater is designed to improve coverage and capacity of LTE, PCS, Celluar, and AWS services. The repeater can provide in building coverage for all trouble areas. SmartCell is easy to install, has remote status monitoring and control functions (NMS System) via a wired line and wireless modem. <Figure 1> In-building Repeater Service Organization
User Manual SmartCell Repeater 82.2 System Design and Operation 2.2.1 System Design <Figure 2> SmartCell Repeater Front Design NO. PART NO. PART 1 SNMP 10 WAN 1 Port 2 FEU (Cavity Filter), optional 11 WAN 2 Port 3 Service Unit #1 12 Modem Antenna Connection Port4 Service Unit #2 13 Donor Port(s) 5 Service Unit #3 14 Service Port(s) 6 Service Unit #4 15 Status LED (RUN/Alarm/Shutdown)7 CLI 16 Input / Output LED 8 UPS 17 Release Button 9 LAN Port 7 8 1 9 10 11 12 2 3 4 5 6 13 14 161517
User Manual SmartCell Repeater 9 <Figure 3> SmartCell Repeater Back Design NO. PORT NO. PORT 1 Main FAN Assembly 4 DC 12V Output Connection2 PSU FAN 5 Power Cable 3 Main Power Switch 12 3 5 4
User Manual SmartCell Repeater 102.2.2 Downlink/ Uplink Path The user may select frequency bands according to the site conditions. After receiving a signal from the donor antenna(s), the repeater improves it and sends a securely isolated signal out to the service antenna(s). Each amplifier module has its own separate digital filter module (DFM). The amplifier module consists of a down converter, up converters, cavity filter, and power amplifier (PAU). In the Downlink Path: 1. RF Signal is received from the donor antenna through the input port. 2. The signal is then converted from RF to IF, 3. The IF signal is digitized by the DA converter, 4. The digital signal is filtered by the DFM (FPGA), 5. The modulator converts the digital signal to an analog RF signal and transmits to the amplifier. 6. Amplifier outputs final signal to service antennas at desired output power. Uplink path works in reverse order. <Figure 5> SmartCell Repeater Block Diagram DFM
User Manual SmartCell Repeater 112.2.3 700MHz Frequency Selection <Figure 6> 700MHz Band Frequency The 700MHz AMP module complies with LTE 3GPP requirements, where a maximum of two non-contiguous block configurations are available. Each block is adjustable per 5 MHz. 2.2.4 850MHz Frequency Selection <Figure 7> 850MHz Band Frequency The 850MHz AMP module provides Cellular service, where a maximum of two non-contiguous block configurations are available. Each block is adjustable to the following bandwidth configurations: A1: 11MHz B1: 10MHz A2: 1.5MHz B2: 2.5MHz
User Manual SmartCell Repeater 122.2.5 1900MHz Frequency Selection <Figure 8> 1900MHz Band Frequency The 1900MHz AMP module complies with PCS Band blocks, where a maximum of three non-contiguous filtering configurations are available. Each sub block is adjustable per 1.25MHz bandwidth steps up to 20MHz. The Following table shows user selectable channel numbers. BAND DL CENTER [MHz] CHANNEL BAND DL CENTER [MHz] CHANNEL A A1 1931.25 25 guard 1965 700 1932.5 50 E 1966.25 725 1933.75 75 1967.5 750 guard 1935 100 1968.75 775 A2 1936.25 125 guard 1970 800 1937.5 150 F 1971.25 825 1938.75 175 1972.5 850 guard 1940 200 1973.75 875 A3 1941.25 225 guard 1975 900 1942.5 250 C C1 1976.25 925 1943.75 275 1977.5 950 guard 1945 300 1978.75 975 D 1946.25 325 guard 1980 1000 1947.5 350 C2 1981.25 1025 1948.75 375 1982.5 1050 guard 1950 400 1983.75 1075 B B1 1951.25 425 guard 1985 1100 1952.5 450 C3 1986.25 1125 1953.75 475 1987.5 1150 guard 1955 500 1988.75 1175 B2 1956.25 525 G 1992.5 1225 1957.5 550 1958.75 575 1250 guard 1960 600 B3 1961.25 625 1275 1962.5 650 1963.75 675
User Manual SmartCell Repeater 132.2.6 2100MHz Frequency Selection <Figure 9> 2100MHz Band Frequency The 2100MHz AMP module complies with CDMA band requirements, where two block configurations are available. In order to set contiguous band F, check ‘Band F1’, ‘Band F2’ and ‘contiguous’ button in the WEB UI. In order to set Band F1 or Band 2 do not check ‘contiguous’ button in WEB UI. Band F configuration is as follows: BAND Downlink Uplink Start Stop Start Stop F F1 2145.15 2149.85 1745.15 1749.85 guard - - - - F2 2150.15 2154.85 1750.15 1754.85 F1 F2
User Manual SmartCell Repeater 143. SETUP 3.1 Equipment Needed for Repeater Setup Parameter ItemQuantityRemarkMajor Component SmartCell Repeater 1 EA Provided by GST Additional Components Wall Mounting BracketCD which contains User Manual and Installation Guide Ethernet Cable 6.6ft (2m) Ground Cable 6.6ft (2m) Ground Sems Screw M4 x 8mm Bracket Sems Screw M5 x 10mmLag Screw 12.7mm x 50.8mm FEU-AMP RF cable FEU-Wall Bracket RF cable Modem-FEU RF Cable 1 EA1 EA 1 EA 1 EA 4 EA 20 EA 4 EA 8 EA 2 EA 1EA Provided by GST Antenna Donor ANTServer ANT 1 EA1 EA Not Included RF Cable Antenna connection CableTBD Not IncludedTesting and Measuring Equipment Spectrum Analyzer 1 EA Not Included 3.1.1 Check points before turning on the Repeater 1) System Power Check: AC electrical power to the repeater should be 110V. Input electricity only after power verification. 2) Input RF Signal Range: Optimal input RSSI into the repeater is -57dBm ~ -27dBm for 700MHz/850MHz/1900MHz/2100MHz. User should verify input condition of Donor ANT. If the input RSSI exceeds -27dBm, then external attenuators should be added. 3) Isolation check between DONOR/SERVER ANT: Isolation condition of this equipment is 105dBc (Gain+15dB). The User should check this condition before installation.
User Manual SmartCell Repeater 153.1.2 Ready for Service 1. Check points before Service: a. Verification of system installation: - Electricity, In/Out antennas, cable connections, and equipment mounting. b. Verification of system accessories: - User should check all necessary accessories. c. Check received signal level: - User should check whether environmental conditions are in accordance with system specifications to ensure the system operation will be optimized. 2. Check points after Service: a. Check external LEDs 1) RUN: Green light ON (Off: all lights off). 2) ALARM: Green light in normal status, Red light in alarm. 3) SHUT DOWN: Green light in normal status, Red light in Shutdown. 3.1.3 Signal Strength LED Check Number of LED bars Input Signal Level Output Power Signal LevelLED 1 bar Less than -86dBm Less than +5dBmLED 2 bars -85dBm ~ -79dBm +6dBm ~ +10dBmLED 3 bars -78dBm ~ -72dBm +11dBm ~ +15dBmLED 4 bars -71dBm ~ -65dBm +16dBm ~ +20dBmLED 5 bars More than -64dBm More than +21dBm Figure 9> Modular Repeater Front LED 4.2 Setting up the Repeater
User Manual SmartCell Repeater 163.2.1 Quick GUI/Configuration Use the following steps to commission the Repeater after all the cabling and antennas are fixed in place and the Repeater is supplied with proper electrical power. The repeater will need a stable Downlink RSSI input level in the range of -85dBm to -60dBm. 1. Connect your laptop to the LAN port on the repeater with a Crossover Ethernet cable. 2. Verify your laptop has all wireless connections turned off and is set to obtain an IP address automatically, or you may use a fixed IP address: 172.16.6.82, with a Subnet Mask of 255.255.255.252, no default Gateway. 3. Open web browser and enter: 172.16.6.81. 4. User name: admin. 5. Password: admin. 3.2.2 Quick Setup 1. Go to the RF Configuration page. 2. Before the Amplifier (HPA) can be turned on, set the Uplink and Downlink attenuation (ATT) to the maximum value and click Apply. 3. Select the correct Band Block and set the ALC Downlink and Uplink Limits to the desired level and click Apply. (To adjust the Output Power, change the ALC Downlink and Uplink Limits to the desired levels). 4. To check the Repeater’s status, click on the Status page. 5. To change the Repeater’s gain, adjust the Uplink and Downlink attenuation in equal amounts not more than 5dB at a time and click Apply. 3.3 WebUI Ranges Table GUI Feature Range Description Downlink and Uplink Output Power Display Below 0dBm to 35dBm The output Power of the Repeater Downlink Low RF Power 2dB to 10dB Threshold for Low RF Power Downlink and Uplink Attenuation Control 0dB to 30dB Reduces Gain Internally Downlink and Uplink ALC Limit 0dBm to 33dBm Limits Output Power Downlink RSSI Display -100dBm to -27dBm Downlink Receive Level at Donor Antenna Port Downlink Low RSSI -93dBm to -57dBm Threshold for Low RSSI Downlink and Uplink AMP On/Off High Powered Amplifier
User Manual SmartCell Repeater 17Control Gain Balance Control On/Off Equalizes Uplink and Downlink Gain Gain Balance Value 0dB to 15dB Subtract Uplink Gain by G/B Value Shutdown Control On/Off Shutdown if Major Alarm is Reported Auto Gain Setting On/Off Automatic Gain Setting for the RepeaterAuto Oscillation Control On/Off Prevents Oscillation Temperature Display 32 to 260.6 Degrees Internal Repeater Temperature AMP Temperature Upper Limit 0 to 299 Degrees Threshold for Temperature Alarm Band Blocks Used/Bandwidth Each AMP The Channel the Repeater will be usingDelay Alarm Report 0 or 5 Minutes Time Delay of Reporting after Alarm is Detected 3.4 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. 3.4.1 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 all connections are tightly secure. These connectors should be cleaned regularly. 3) If technician thinks there is a serious problem, call technical support. 1-866-9-GST-USA (1-866-947-8872) 3.4.2 Alarm Information Alarm Name What causes this alarm Troubleshooting Methods Downlink Spurious emissions out of spec Downlink Output Power exceeds Downlink Upper Limit * The Downlink Output Power should not exceed the maximum composite power spec for this unit. * If the Downlink Output Power is not exceeding the composite power spec for this unit, try to increase the Downlink Upper Limit on the RF Configuration Page. * Add equal amounts of Uplink and Downlink attenuation until the Downlink Output Power is less than the Downlink Upper Limit. * Set the ALC Downlink Limit on the RF Configuration Page to a value lower than the Downlink Upper Limit Downlink Hardware failure Downlink path gain is 6dB less than RSSI pl * By default, if the Downlink Low Output Variance is set to 10dB, the Repeater will not report this alarm.
User Manual SmartCell Repeater 18us Output Power * Increase the Downlink Low Output Variance on the RF Configuration Page. Downlink Donor power too low Input RSSI from Donor site is 8dB less than Downlink Low Input Limit * By default, if the RSSI Lower Limit is set to -93dBm, the Repeater will not report this alarm. * Decrease the Downlink Low RSSI Limit level on the RF Configuration Page. * Increase the RSSI level into the Repeater. Downlink VSWR When the VSWR Ratio on the Server Port is greater than 3 : 1 * "Sweep the line" to check for loose or damaged connectors and/or cabling. * If after checking the entire Server side, the VSWR alarm still exists and the system is working fine, Disable the alarm on the Alarm Configuration page. Downlink Donor power too high Downlink Input Power is greater than -25dBm * Check position of the Donor antenna. * Add attenuator to the Donor port at the highest input power level. Downlink Synthesizer failure Failure of the synthesizer Downlink path * Turn OFF/ON the System by pressing ON/OFF button on the back side panel. * Call GST’s Tech Support Team and exchange the AMP unit. Downlink Interfere power exceeded Out-band signal is about 15dB greater than in-band signal * Call GST’s Tech Support Team for further instructions.Uplink Out of band emissions out of spec Uplink Output Power exceeds Uplink Upper Limit * The Uplink Output Power should not exceed the maximum composite power spec for this unit. * If the Uplink Output Power is not exceeding the composite power spec for this unit, try to increase the Uplink Upper Limit on the RF Configuration Page. * Add equal amounts of Uplink and Downlink attenuation until the Uplink Output Power is less than the Uplink Upper Limit. * Set the ALC Uplink Limit on the RF Configuration Page to a value lower than the Uplink Upper Limit Uplink Power at coverage port too high Uplink Input Power is greater than -25dBm * Check position of the Coverage antenna. * Add attenuator to the coverage port or use another device to regulate Uplink output power. Uplink Synthesizer failure (Uplink Hardware failure) Failure of the synthesizer Uplink path * Turn OFF/ON the System by pressing ON/OFF button on the back side panel. * Call to GST’s Tech Support Team and exchange the AMP unit. Uplink (Downlink) Software failure Alarming in DFM of the amplifier unit * Turn OFF/ON the System by pressing ON/OFF button on the back side panel. * Call to GST’s Tech Support Team and exchange the AMP unit. Oscillation detected/Low isolation Insufficient isolation is detected when the Repeater is at minimum gain * Verify that the Donor antenna is on the same side of the building as the Donor site, and if needed, raise the Donor antenna up on a pole. * Change the types of antennas used, such as Yagi to Corner-Reflector for outdoors, and Omni to a Panel for indoor
User Manual SmartCell Repeater 19use. * Move the closest indoor service antenna farther away from the outside Donor antenna. * Close the repeater door if opened and verify that the closest indoor coverage antenna is not in the same room as the repeater. Field Replaceable module failure Mismatch of AMP unit and filter service in DFM * Call GST's Tech Support Team to verify all the settings are correct. Tamper Detected Change of mounting information in the System * Wait 5 minutes to clear alarm automatically. * If you want to disable, you can on the Alarm Configuration page. Communication Failure Bad connection of NMS board and AMP unit * SNMP board or AMP unit need to reset. * Open the rear cover and check the each cable. Power Supply out of range The internal Power Supply detects improper Voltage * If the system is working fine, disable the alarm on the Alarm Configuration page. * Call to GST's Tech Support Team to verify that all the settings are correct. Over Temperature Internal AMP temperature exceeds the Temperature Limit * Verify the Temperature Limit is set between 176 °F ~ 201 °F on the RF Configuration page. (Default Value is 163°F) Reset alarm During reset of the unit, * Wait 30 seconds to clear alarm automatically. Manual Shutdown During the shutdown algorithm after re-check the system is completely shut downed. * Turn OFF/ON the System by pressing ON/OFF button on the back side panel. * Reset AMP unit in WebUI. FAN FAN Failure * Replace FAN.
User Manual SmartCell Repeater 203.4.3 Troubleshooting Guide Related to RF Item Check Point Troubleshooting Check before system operation System input power range -Downlink: -100dBm ~ -27dBm -Uplink: -100dBm ~ -27dBm System gain (DL/UL) - 60dB ~ 90dB Output power at server port - Downlink: 33dBm ± 2dB - Uplink: 33dBm ± 2dB Check points before open for service -Please check quantity of all accessories with specification before you set up -Fit cable length in accordance with field condition Check after system operation Check points after open for service Check following status; -Verify the antennas are securely mounted and pointed in the correct directions -Connection status between antennas and RF cable-Verify the Repeater is securely mounted -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 When repeater does not work properly Check electricity cord connection status -Re-plug in Adapter cord When in alarming DL VSWR alarm Check following status; -Make sure Server Antenna Port is disconnected. -Reset Adapter upon completing Alarm troubleshooting DL over-output alarm -Make sure output power is operating normally -Reset Adapter upon completing Alarm troubleshooting UL over-output alarm -Make sure output level is operating normally -Reset Adapter upon completing Alarm troubleshooting Temperature alarm Check following status; -Setting level of maximum temperature limit -Temperature offset is normal or not -Circumstances of temperature -Reset Adapter upon completing Alarm troubleshooting RF off -Verify the HPA’s are On -Reset Adapter upon completing Alarm troubleshooting When output power is no longer Technician should verify category of alarm at the front side of repeater -Red light on the Shutdown LED, technician should troubleshoot the alarm via Notebook computer
User Manual SmartCell Repeater 21problem -Technician should connect antenna with output port of repeater -Make sure all connectors are fastened -Reconnect the connector -Change it if the connector is defective Check the input level -Increase output power or check input change of BTS side Check gain of the unit -If the Gain is different from normal level, please contact GST’s Technical Support Cable connector loose -It is possible for connectors to get too tight and damage the equipment or throughput -Contact installer or service provider In case of dropped call or bad signal after set up Check input signal strength in the service area -Increase output power level of repeater by adjusting attenuation level If input signal strength is not a problem, please check delay of calling time -Increase output level of Uplink signal, then set to optimal level. Check RSSI signal strength -Contact network management team or service provider In case output Signal wavelength is not shown flat or looks like oscillation Check connection fastened between antenna and cable (Signal wavelength should be flat and stable if technicians shake CABLE. If not, it is connection problem) -If connection is not proper, reconnect cable and connector and then check the output power again Input level change or module overheating -Check input level from BTS side. -Check performance of each module (Diagnosed by GST’s Technical Supportm) Please check VSWR of the cable is normal -Change to normal Cable
User Manual SmartCell Repeater 223.4.4 Troubleshooting Guide Related to NMS Symptom Check Points Troubleshooting Link Fail Communication problem -In case of Ethernet, verify IP addressing, DHCP function, and that cookies are deleted -Verify that a crossover Ethernet cable is being usedCLI connection, cable status check -Make sure 1:1 connection -Follow instructions in the installation guide for this connection procedure CLI connection Check by USB to serial cable -Verify port number of PC communication -Check cable connection status If technician thinks there is a serious problem, call GST’s Technical support. 1-866-9-GST-USA (1-866-947-8872).
MPE Information ⓒ SAMSUNG Electronics Co., Ltd. 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 50 cm during normal operation. The gain of the antenna is 9.0 dBi.The antenna(s) used for this transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

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