RF Technology RF-215D RF Amplifier User Manual

RF Technology Inc RF Amplifier RF215D MANUAL

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Contents

RF215D MANUAL

RF TECHNOLOGY, INC.16 TESTA PLACESOUTH NORWALK, CT 06854PHONE 203-866-4283FAX 203-853-3513E-MAIL RFT@RFTECHNOLOGY.COMWEB WWW.RFTECHNOLOGY.COMRF-215DAMPLIFIERMANUAL
RF TECHNOLOGY, INC.RF-2185D AMPLIFIERDESCRIPTION The RF-215D amplifier consists of a regulator board and RF amplifier boards mounted in a machinedaluminum weatherproof housing. The RF-215D amplifier is not field repairable due to the expertise andtest equipment required to effectively make repairs. A general description of the RF amplifier section andthe operation of the regulator circuit are presented for information purposes.REGULATOR:The regulator regulates the input voltage (+10.6 to +18VDC) to +10.0V and generates a –5V voltage.A +5V regulator (U2) provides the reference voltage for the regulator consisting of U3A and Q1. Theregulated voltage of +10V is set by R6.The +5v output of U2 is also fed to a dc-dc converter IC (U1) through a filter consisting of L1, C19 andC20. The –5V output of U1 is used to control the current in the microwave FET transistors. A circuit(U3B) is used to turn off the regulator transistor Q1 until the –5V is present or in the event of the loss ofthis negative voltage. This circuit is required because a microwave FET transistor can be damaged if the+10V were to be applied before the current regulating –5V is available.The regulator circuit board also contains a detector amplifier consisting of U4A and U4B that amplifiesthe RF detector output to level used for indicating the presents of an RF output signal.A mute input provision is provided on the regulator board for muting the RF output when a transmitter isplaced in the standby mode.RF AMPLIFIER:The RF amplifier is a three stage amplifier with input and output isolators. The input and output isolatorsprovide an input and output impedance match and reduce the possibility of instability that could be causedby an external impedance mismatch.The circuit boards are a microwave substrate onto which is etched a computer aided designed microstripcircuit. Incorporated in the microstrip circuit design is a coupler for the RF output detector and a lowpassfilter.The amplifier is operated in the saturated mode and requires an input level of 10 to 40mW (+10 to+16dBm) to achieve the rated output level of 12W (+39dBm).
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Document ID66809
Application IDnxGLJGvZWvHEYbexvrLkpw==
Document DescriptionRF215D MANUAL
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeUser Manual
Display FormatAdobe Acrobat PDF - pdf
Filesize0.69kB (8605 bits)
Date Submitted1999-10-27 00:00:00
Date Available2000-03-15 00:00:00
Creation Date2001-05-21 12:20:35
Producing SoftwareAcrobat Distiller 4.0 for Windows
Document Lastmod2001-05-21 12:20:37
Document TitleRF215D MANUAL
FCC ID Filing: B8HRF-215D

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