Bi-Directional Amplifier
System
Part Numbers
48960
Operation and Installation Manual
200 Pond View Drive
Meriden, CT 06450 U.S.A.
Telephone (877) 737-9675
FAX (203) 821-3852
www.rfsworld.com
Страница 1: ...Bi Directional Amplifier System Part Numbers 48960 Operation and Installation Manual 200 Pond View Drive Meriden CT 06450 U S A Telephone 877 737 9675 FAX 203 821 3852 www rfsworld com ...
Страница 2: ...nformation contained in this document is considered confidential material proprietary to Radio Frequency Systems and is solely for information purposes The information shall not be used by anyone other than Radio Frequency Systems to design or construct any of the items depicted nor shall it be disclosed duplicated or copied for any purpose nor made available to any third party without the prior w...
Страница 3: ... OF OPERATION 7 BLOCK DIAGRAM 7 ELECTRICAL SPECIFICATIONS 8 MECHANICAL SPECIFICATIONS 8 ENVIRONMENTAL SPECIFICATIONS 8 INTERMODULATION POWER AND AGC 9 AGC SET POINT ADJUSTMENT 9 AGC AUTOMATIC SHUTDOWN 10 MANUAL GAIN ADJUSTMENT 10 AC DC POWER 10 GROUNDING AND SURGE PROTECTION 10 INSTALLATION 11 ANTENNA ISOLATION 12 DIAGNOSTICS TROUBLESHOOTING 13 TEST POINT DESCRIPTIONS 13 FACEPLATE 14 COMPONENT LOC...
Страница 4: ...djustment access holes are clearly marked on the bottom Under normal circumstances you need not make any adjustments For more information see installation section The terminology RX and TX are being replaced by UL for uplink and DL for downlink respectively The 48900 series bi directional amplifiers repeaters signal boosters are designed and optimized for low cost high reliability and ease of use ...
Страница 5: ...le area Both antennas should be fixed mounted Installation considerations for both of these will be discussed separately Donor antennas receive the base site TX signals and transmit the mobile TX signals back to the base site uplink paths These are typically mounted on rooftops or tower structures The maximum output power of the uplink path is less then 80 mW 19dBm Section 1 307 b 1 excludes from ...
Страница 6: ...creased to make up for cable and or splitter or tap losses For example if a 2 way splitter is used to provide for two antennas in different parts of the service area then the antenna gain may be increased to 14 dB to make up for the loss of the splitter 3 6 dB The maximum service area antenna gain for any specific location can be calculated as follows 11 dB accumulated losses to the antenna Produc...
Страница 7: ... downlink amplifiers are broadband to accommodate all the channels in the passband Differentiation is provided by the duplexing filters These determine the basic pass band and prevent oscillation between the uplink and downlink by attenuating the opposing link frequencies Both the downlink and uplink gain paths have Manual and Automatic Gain Control AGC to prevent an overdrive condition The AGC se...
Страница 8: ...nput 2 0 2 0 Propagation Delay worst case at band edge 0 5 microsecond 0 5 microsecond Power 120 220 Auto Ranging IEC 320 Socket 110 VAC 2 A 20dB band width typical 26Mhz for 851 869 12Mhz for 935 941 26Mhz for 806 824 12Mhz for 896 902 AGC circuitry monitors the output power and reduces the gain to prevent overdrive and oscillation No attenuation and at room temperature Mechanical Specifications ...
Страница 9: ...ntil the detector voltage is at a safe level again If the number or power of the signals is reduced the DC offset voltage will reduce the level of attenuation In typical operation the AGC is only active when needed to prevent overdrive If the AGC is constantly activating RFS suggests that you reduce the gain via the manual attenuator and verify that an oscillation between the base and service ante...
Страница 10: ... in dBs of attenuation Resultant gain is full gain 63 67 dB the number indicated by the attenuator setting To lock the setting on either attenuator a M3 screw is included with this manual Insert and tighten the screw in the spacer on the attenuator inside unit AC DC Power AC power is supplied through a standard 3 wire male plug connected through a standard IEC 320 plug Connect this plug to any sta...
Страница 11: ...DL signals are strong enough to achieve the desired output power Also check for strong undesired signals in the pass band or on the pass band edge these may cause overdrive and AGC gain reduction The donor antenna may need to be realigned to optimize the signal levels Install service area antenna s Determining the location and type of service area antennas is part of the distribution system design...
Страница 12: ...stem test it most likely indicates that there is a hot spot in the service area where the subscriber signal is overdriving the uplink It is best to minimize this effect by relocating the nearest service antenna or adding an attenuator pad to reduce the UL signal strength In some cases a coupler may be needed to add a low power antenna in specific locations For this reason it is best to have extra ...
Страница 13: ...e unit is not in AGC shut down If the Fault LED is cycling then an overdrive condition exists See AGC Automatic Shutdown section Green power LED lit and no red Fault LED on faceplate unit does not appear to be working Check for a break in the donor or distribution networks Also check to ensure the donor signal is still available to the repeater An obstruction could be blocking the donor base site ...
Страница 14: ...ITEM 602100023500 DOCUMENT TYPE Operation and Installation Manual REV A DOC 602100023 PAGE 14 OF 16 TITLE Bi Directional Amplifier System Faceplate DL UL ...
Страница 15: ...ion and Installation Manual REV A DOC 602100023 PAGE 15 OF 16 TITLE Bi Directional Amplifier System Component Location Only the power supply is field replaceable part number 31500012900 AGC Adjust Downlink Uplink Location of locking spacer ...
Страница 16: ... on the outside of the package to Radio Frequency Systems 175 Corporate Court Meriden CT 06450 Limited Warranty The Seller warrants that at the time of shipment the products manufactured by the Seller are free from defects in material and workmanship The Seller s obligation under this warranty is limited to replacement or repair of such products within one year from the date of shipment No materia...
