Version COMPROD COMMUNICATIONS LTD.
Technical Manual 2011, Comprod Communications LTD. 138 De La Barre Boucherville, QC, J4B 2X7 Phone 1.800.641.1454 • Fax 1.800.641.4616 3405 N. Benzing Road Orchard Park, NY, USA 14127 Phone 1.800.603.1454 • Fax 1.800.554.
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L IMPORTANT: The integrator is responsible for its product to comply with IC ICES-003 & FCC Part 15, Subpart B – Unintentional Radiators. Final product must comply with unintentional radiators before declaring compliance of their final product to Part 15 of the FCC Rules and Industry Canada ICES-003.
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L Class B Amplifier Box Description 1) This Amplifier is designed around the philosophy of Anytime, Anywhere, and Anyplace and uses Class “AB” Amplifiers, designed for a more constant and reliable Amplifier unit. Designed to be used in buildings, tunnel, government facilities, airports, providing the communication throughout. Typically, the Amp box will be connected to either radiant cable or a distributed antenna system.
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L Specifications Our UHF amplifier have been designed with government agencies in mind. These are our highest level of performance and quality for continuous duty solutions while providing maximizing coverage. Available in rack mount, nema stainless steel, or painted steel nema enclosures.
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L Figure 1: Bloc diagram of the UHF Amplifier with external filter/diplexer connection 6
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L VGA Max Input Level and Optimum Input Level – MSA#1 Setting The VGA can maintain constant its output power for any composite input level from –60 to -25dBm. If the input level is too high, the MSA#1 must be used to provide additional attenuation, then decrease the input signal to the correct level. The MSA#1 attenuation can be set from 0 to 30dB per 2dB step, by mean of a hexadecimal switch (16 positions from “0” to “F”).
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L Output Power Level – MSA#2 Setting The preset level of the MSA#2 is Factory set with a 2 carrier input while monitoring IM products, such that these IM products do not exceeding -13 dBm at the diplexer common port. This Factory set gives the maximum operable power, therefore the unit must not be re-adjusted for giving higher output.
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L VGA and PA output port termination Due to the ALC loop, the VGA maximum gain can be as high as 120dB. If the VGA output is not connected, (or terminated by a highly reflected load), the last stage of amplification (i.e. the PA driver) can be damaged. In such a case, the VGA still works but it won’t be able to drive the PA unit to the nominal output power.
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L Table IV: General specifications Description Condition Min Operating Range and Configuration Operable Frequency Range UBDA3845 ● 380 ● 406.0-406.1 MHz will not be included.
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L 3.5dB, especially where the output signal is re-radiated and can cause interference to adjacent band users. This power reduction is to be by means of input power or gain reduction and not by an attenuator at the output of the device.
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L Figure 2: Amplification Module – Inside view 12
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L DownLink Connectors UpLink Connectors Power Breaker ON AC In 120/220V DL PA In UL PA In UL VGA Out UL PA Out UL VGA In DL PA DL VGA Out In DL VGA Out Figure 3: Amplification Module - Outside view 13
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L Unpacking 1) The UHF BDA should be unpacked soon after delivery and carefully inspected for possible shipping damage. It is the customer’s responsibility to file claims with the freight carrier if damage is suspected and is usually limited to a certain time period after delivery. 2) Carefully compare the packing slip(s) against the package contents to verify the receipt of all expected items.
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L - Antennas should be mounted following the manufactures guild lines for RF connection and being affixed to the building or location of desired signal. - All cables used in the DAS system shall be 50 ohms and clamped properly to insure the cables 50 ohm impedance characteristics. Improper clamps will change the impedance of the cable at that location thus changing the efficiency of the system.
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L Labeling Instruction Figure 4: Label position on the BDA unit 16
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L The UHF Bi-directional Amplifier is delivered as a system with the Filter & Diplexer Unit. The BDA has its FCC/IC label on the front door, as shown in the above picture. This label must not be removed.
U H F B I - D I R E C T I O N A L A M P L I F I E R T E C H N I C A L M A N U A L Warnings and Notices WARNING: Changes or modifications not expressly approved by Comprod Communications could void the user’s authority to operate the equipment WARNING: To satisfy FCC RF exposure requirements for mobile transmitting devices, a separation distance of 66 cm or more should be maintained between the antenna of this device and persons during device operation.
