Tait TB8100 User Manual

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3 Equipment Required © Tait Electronics Limited April 2006Equipment RequiredYou need the following equipment for field calibration:■ Calibration and Test Unit (CTU, order code TBA0STU), which comescomplete with the cables you will need for connection to the reciter/PA andthe PC. For more information about the CTU, please refer to TN-778 TheCalibration and Test Unit.■ Tool kit (order code TBA0ST2) which comprises tuning tools and therequired screwdrivers in a tool pouch. The ceramic-tipped Murata tuningtool is used for most procedures, but the metal-tipped Johanson 8777 tuningtool with its narrower blade is needed for tuning the front end of H-bandand K-band receivers.■ 10-30 V DC power supply (if the PMU does not have a 12 V or 24 Vauxiliary power supply module)■ RS-232 cable■ RF attenuator (optional – depends on the setup)You may need the following additional equipment for a service centercalibration:■ Frequency counter■ Modulation meter■ RF signal source■ AC millivoltmeter (one with a differential input may be required for“Calibrating the Balanced Lines” on page 20)Refer to the individual procedures for equipment setup diagrams.Calibration OverviewAny calibration process creates digital values and a calibration date, which arestored in the base station. The Service Kit can display the date of the lastcalibration. Many calibration procedures initially clear the stored digital values.If you do not complete the procedure or the stored digital values are outsideacceptable limits, the module is left uncalibrated. An uncalibrated reciter will gointo Download mode on startup and cannot be put into Run mode. Anuncalibrated PA generates a calibration invalid alarm.If the procedure you are performing requires access to tuning holes, you needto remove the reciter from the subrack and connect to it via the CTU.The following tables summarise, for each procedure, whether or not you needto remove the reciter from the subrack, and what equipment (in addition to aPC with the TB8100 Calibration Kit software) you will need.