® Rack Mount Distribution Amplifiers, with Power Doubled Hybrid Output 1 DAR DISTRIBUTION AMPLIFIER GAIN MIN. SLOPE MAX. MIN. F2 POWER FLAT OUTPUT MONITOR -20 dB INPUT MONITOR -20 dB F3 F4 DESCRIPTION The R.L. DRAKE models DAR8642, DAR8633, DAR8618, DAR7542, and DAR7533, are broadband distribution amplifiers designed for indoor headend use in both residential and commercial buildings where RF signal distribution in the frequency range of 47 to 860 MHz is required. Each model, except the DAR8618, incorporates a push-pull hybrid input preamp and a power doubled hybrid output amplifier to provide a very low distortion signal for launch amp applications in the output of an SMATV or CATV headend. The Gain and Slope controls operate between the preamp hybrid and the output hybrid to maintain a low noise figure over a wide range of gain and slope settings. Only the DAR8618 has a power doubled output hybrid with no input preamp. Input and output test connectors are provided for convenient monitoring of the signal path. The amplifier circuitry is designed for maximum stability, low distortion, low noise figure, and is protected in a rugged aluminum housing. The unit operates from a nominal 100-240 VAC, 50/60 Hz input. F5 F1 F1 - POWER LED This indicator illuminates when power is supplied to the unit. F2 - INPUT MONITOR This connector may be used to monitor input to the DAR. The levels will be 20 dB below the input levels at R3. F3 - GAIN Adjusts the amplifier interstage attenuator. F4 - SLOPE Adjusts the slope of the output signal. F5 - OUTPUT MONITOR This connector may be used to monitor the output of the DAR. Levels will be 20 dB below those present at R2. R2 must be terminated in 75 Ohms for an accurate reading. 2 Rear Panel Connections R1 R2 R1 - AC LINE CORD Connect this line cord to a 100-240V, 50/60 Hz AC power source. R2 - RF OUTPUT This is the RF output for CATV distribution and is the amplified output of channels that are input to port R3 from 54 MHz and higher. R3 - RF INPUT This connector accepts the RF input from a headend combiner output, 54 MHz and higher. R3 Installation INSTALLATION 1) Unpack the distribution amplifier. 2) Mount the amplifier in the desired location in the rack. Be sure to leave at least one open rack space above and below the amp to allow proper ventillation. 3) Connect input and output cables to the amplifier. 4) Plug the power line cord into a power source. 5) Preset slope control fully clockwise. 6) While monitoring the output levels at the Output Monitor -20 dB test port, adjust the Gain control for desired output at the high end of the band. Then monitor the lowest channel and adjust slope control to equalize this channel to the desired level (usually equal to but not higher than the high end of the band). Since there can be a slight interaction between the slope and gain settings, it is advised to repeat this step a few times to ensure the desired levels are attained. NOTE: The -20 dB input and output test ports can be used to monitor input and output levels. These are only accurate when the load is connected to the amplifier output and power is on. A WORD CONCERNING INPUT LEVELS It is important to keep the input level to the amplifier within an optimum range. If the level is too high, higher nonlinear distortion will result and if the level becomes too low, C/N might be less than desired. As a general rule, stay within the optimum input level range listed in the specifications. The listed levels assume a fully loaded channel complement. Higher levels may be used if the channel loading is less. 3 4 Specifications and Warranty SPECIFICATIONS COMMON TO ALL MODELS (unless otherwise noted) Forward Gain Adjustment Range: Slope Control Adjustment (54 MHz): Input/Output Impedances: Input and Output Monitor Ports: Hum Modulation: 15 dB minimum 10 dB minimum 75 Ohms. - 20 dB. - 65 dB. ADDITIONAL SPECIFICATIONS FOR SPECIFIC MODELS DAR7533 1002719A 47 to 750 MHz. 30 dB. 8 dB maximum. 14 dB. 110 CH. Frequency Coverage (forward path): Forward Gain: Noise Figure: Return Loss, Input & Output: Channel Loading: Output Level (maximum per channel for distortions listed below): +36/44 dBmV. Input Level (maximum): +20 dBmV. Optimum Input Level Range for Best Performance: +10 dBmV to +15 dBmV. Nonlinear DistortionsComposite Triple Beat: - 66 dB. Composite Second Order: - 64 dB. Cross-modulation: - 70 dB. Power Requirement: Operating Temperature Range: Size: Weight: 100-240 VAC, 50/60 Hz - 20 deg. to + 60 deg. C. 19.00" W x 5.0” D x 1.75" H. 8 lb s. (3.6 Kg). DAR7542 1002720A 47 to 750 MHz. 42 dB. 6.5 dB maximum. 14 dB. 110 CH. DAR8633 1002722A 47 to 860 MHz. 30 dB. 8.5 dB maximum. 14 dB. 129 CH. DAR8642 1002723A 47 to 860 MHz. 42 dB. 7 dB maximum. 14 dB. 129 CH. DAR8618 1002721A 47 to 860 MHz. 18 dB. 7.5 dB maximum. 14 dB. 129 CH. +44 dBmV. +10 dBmV. 36/44 dBmV. +18 dBmV. +36/44 dBmV. +7 dBmV. +40 dBmV. +22 dBmV. +0 dBmV to +5 dBmV. +7 dBmV to +12 dBmV. -3 dBmV to +2 dBmV. N/A - 58 dB. - 58 dB. - 60 dB. - 62 dB - 67 dB. - 67 dB. - 62 dB. - 67 dB. - 67 dB. - 61 dB. - 60 dB. - 68 dB. THREE YEAR LIMITED WARRANTY R.L. DRAKE HOLDINGS LLC warrants to the original purchaser this product shall be free from defects in material or workmanship for three (3) years from the date of original purchase. During the warranty period R.L. DRAKE HOLDINGS LLC or an authorized Drake service facility will provide, free of charge, both parts and labor necessary to correct defects in material and workmanship. At its option, R.L. DRAKE HOLDINGS LLC may replace a defective unit. To obtain such a warranty service, the original purchaser must: 1. Retain invoice or original proof of purchase to establish the start of the warranty period. 2. Notify R.L. DRAKE HOLDINGS LLC or the nearest authorized service facility, as soon as possible after discovery of a possible defect, of: a) the model and serial number, b) the identity of the seller and the approximate date of purchase; and c) A detailed description of the problem, including details on the electrical connection to associated equipment and the list of such equipment. 3. Deliver the product to R.L. DRAKE HOLDINGS LLC or the nearest authorized service facility, or ship the same in its original container or equivalent, fully insured and shipping charges prepaid. Correct maintenance, repair, and use are important to obtain proper performance from this product. Therefore carefully read the Instruction Manual. This warranty does not apply to any defect that R.L. DRAKE HOLDINGS LLC determines is due to: 1. Improper maintenance or repair, including the installation of parts or accessories that do not conform to the quality and specifications of the original parts. 2. Misuse, abuse, neglect or improper installation. 3. Accidental or intentional damage. All implied warranties, if any, including warranties of merchantability and fitness for a particular purpose, terminate three (3) years from the date of the original purchase. The foregoing constitutes R.L. DRAKE HOLDINGS LLC'S entire obligation with respect to this product, and the original purchaser shall have no other remedy and no claim for incidental or consequential damages, losses or expenses. Some states do not allow limitations on how long an implied warranty lasts or do not allow the exclusions or limitation of incidental or consequential damages, so the above limitation and exclusion may not apply to you. This warranty gives you specific legal rights and you may also have other rights which vary from state to state. This warranty shall be construed under the laws of Ohio. ® R.L. Drake Holdings LLC 710 Pleasant Valley Drive Springboro, Ohio 45066 Customer Service and Parts Telephone: +1 (937) 746-6990 Fax:+1 (937) 806-1510 www.rldrake.com ® is a registered trademark of the R.L. Drake Holdings LLC © Copyright 2012 R.L. Drake Holdings LCC P/N: 651230400A Printed in China. 20121005 1002719A. 1002720A. 1002721A. 1002722A. 1002723A.