User's Manual

TB8100 Calibration Kit User’s Manual Equipment Required 3
Equipment Required
You need the following equipment for field calibration:
■ Calibration and test unit (CTU) (order code TBA0ST1) which comes with
the cables you will need for connection to the reciter/PA and the PC. For
more information about the CTU, please refer to TN-778 The TB8100
Calibration and Test Unit.
■ Calibration test kit (order code TBA0ST2) which comprises tuning tools
and the required screwdrivers in a tool pouch
■ 10-30 V DC power supply
■ RS-232 cable
■ RF attenuator (optional – depends on the setup)
You may need the following additional equipment for a service center
calibration:
■ Frequency counter
■ Modulation meter
■ RF signal source
■ AC millivoltmeter (one with a differential input may be required for
“Calibrating the Balanced Lines” on page 18)
Refer to the individual procedures for equipment setup diagrams.
Calibration Overview
Any calibration process creates digital values and a calibration date, which are
stored in the base station. The Service Kit can display the date of the last
calibration. Many calibration procedures initially clear the stored digital values.
If you do not complete the procedure or the stored digital values are outside
acceptable limits, the module is left uncalibrated. An uncalibrated reciter will go
into Download mode on startup and cannot be put into Run mode. An
uncalibrated PA generates a calibration invalid alarm.
If the procedure you are performing requires access to tuning holes, you need
to remove the reciter from the subrack and connect to it via the CTU.
The following tables summarise, for each procedure, whether or not you need
to remove the reciter from the subrack, and what equipment (in addition to a
PC with the TB8100 Calibration Kit software) you will need.
25-way cable
15-way TaitNet
cable
16-way cable
Power cable
RF cable
BNC to BNC
cable