2 Version COMPROD COMMUNICATIONS LTD.
Technical Manual 2014, Comprod Communications LTD. 88 Industriel Blvd Boucherville, QC, J4B 2X2 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.
V H F U N 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.
V H F U N 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 Module Description Based on the philosophy of Anytime, Anywhere, and Anyplace, the unidirectional amplifier module (UDA) is designed for an ease of use and being adaptable to various needs on the field. Recently developed technologies are applied and with the use of modern integrated circuits and RF components, the Comprod design ensures constant performances and reliable amplifier unit.
V H F U N 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 DC power needs of the VGA and PA. The unit can also be fed directly with the DC power, by selecting the AC/DC switch to DC position and connecting +48 Volts (1A) and +6 Volts (2A) to the DC input connector. The operator must ensure that his external DC power supplies are compliant with FCC Class A limits on the radiated and conducted emission. - The unit does not have built-in UPS/Battery system.
V H F U N 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 Power supplies and Alarms The UDA can be fed with AC or DC power, via AC Input or DC Input ports, selected by mean of an AC/DC sliding switch. The AC power source could be 50 or 60Hz, with a voltage ranging from 100V min. to 260V max. The DC supplies of +48Volt/1.5A (+52Volt max) and +6Volt/2A (+12Volt max) should be provided via pins #1, #2 and #6 of the DC Input (D-sub 9 pins connector).
V H F U N 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 –65 to -25dBm. If the input level is too high, the MSA#1 must be used to provide additional attenuation, and then decrease the input signal to the correct level.
V H F U N 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 limited output power of the Amplifier module 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 defines the maximum operable power, since the PA will automatically shut down if higher output power is forced. The unit must not be re-adjusted for giving higher output.
V H F U N 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 PA unit does have an input power detector. If more than +3dBm is detected at the input port, the PA drain voltage will be turned off, and the ALM red LED will turn ON. In order to bring the PA back to its normal operation state, the operator should decrease the PA input power at least 10dB, then reset the main power supply if necessary, and re-adjust the PA input power again to the desired level.
V H F U N 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 Table IV: General specifications Description Condition Min Operating Range and Configuration Operable Frequency Range 138 Configurable by the Nominal Bandwidth external channel filters and diplexers Diplexer recommended insertion loss Channel Filter allowable Insertion Loss Gain & ALC Maximum Gain 100 Nominal Gain (at -45dBm input power) no filter nor diplexers Input Manual Attenuation range 2dB step 0 Auto
V H F U N 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 PA Output PA DC Power OK LEDs PA Input PA Input Power OK LEDs VGA Output Output Att Control Switch AC/DC Selector VGA PWR OK ALM & DC Input RSSI LED LO HI AC Input Input Att Control Switch AC On/Off Figure 3: VHF Unidirectional Amplifier 11 VGA Input
V H F U N 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 VHF UDA 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.
V H F U N 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 - 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. - Antenna placement through the DAS system is important to impose a balanced distributed signal.
V H F U N 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 0.350" 0.
V H F U N 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 Unidirectional Amplifier has its FCC/IC label on the front cover, as shown in the above picture. This label must not be removed.
