Tait TB8100 User Manual
Calibration kit
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- Service manual (306 pages) ,
- User manual (254 pages) ,
- Installation and operation manual (144 pages)
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Troubleshooting
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Summary of Contents for Tait TB8100
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Page 1: Calibration Kit
TB8100 base station Calibration Kit User’s Manual MB8100-90-00-806 June 2003... -
Page 3: Table Of Contents
Disclaimer ..................iii Typographical Conventions ..............iii Associated Documentation ...............iii Publication Record ................iv About TB8100 Calibration Kit ................5 Tour of TB8100 Calibration Kit .............5 About the Toolbar ................6 About the Status Bar ................6 Basic Tasks ......................7 Equipment Required ................7 Tuning Tool ..................7 Reciter Tuning Holes ................8... - Page 4 Calibrating the Power Amplifier ..............25 Calibrating the PA Bias ................ 25 Calibrating the PA Power ..............26 Troubleshooting Tips ..............27 Calibrating the Forward and Reverse Detector Bias Voltages ....27 Index .................. 29 MB8100-90-00-806 © TEL 2003 ii Contents...
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Page 5: Preface
Welcome to the TB8100 Calibration Kit User’s Manual. This manual provides you with information about the Tait TB8100 Calibration Kit in PDF format. You can view it online or print it if you want a paper copy. It describes how to use Version 1.0 of the Calibration Kit. -
Page 6: Publication Record
Tait TB8100 base station. You can also use it to carry out diagnostic tests on the base station and to update its firmware. The Service Kit also has online Help. -
Page 7: About Tb8100 Calibration Kit
The Calibration Wizard takes you step-by-step through the procedure you have selected. When the TB8100 Calibration Kit is connected to the reciter or base station, you can view further details (such as module number, type, serial number, and band) about the currently selected reciter and/or PA by clicking Show Details. -
Page 8: About The Toolbar
Base Station > Calibrate, you can click the Calibrate icon on the toolbar. Connect Connects the TB8100 Calibration Kit to the base station and opens the communication channels. Switch Base Lets you select another base station to calibrate if there are multiple base stations Station in the rack. -
Page 9: Basic Tasks
RF attenuator (optional—depends on the setup) RF signal source Refer to the individual procedures for equipment setup diagrams. For more information about the calibration test unit, please refer to the TB8100 Service Manual. Tuning Tool The recommended tuning tool (for adjusting the front-end helical filters and... -
Page 10: Reciter Tuning Holes
Reciter Tuning Holes The following topics show the location of the holes for tuning the front-end helical filters, and the VCO (Voltage Controlled Oscillator) in the reciter. Adjusting the When you tune the VCOs and the front-end helical filters, turn the tuning tool: frequency Clockwise to reduce the frequency Anti-clockwise to increase the frequency... -
Page 11: Configuring Tb8100 Calibration Kit
The following tables summarise, for each procedure, whether or not you need to remove a module from the subrack, and what equipment (in addition to a PC and the TB8100 Calibration Kit software) you will need. TB8100 Calibration Kit User’s Manual... -
Page 12: Connecting To The Reciter Outside The Subrack
For instructions on how to connect to the reciter depending on whether it is outside or inside the subrack, refer to: “Connecting to the Reciter Outside the Subrack” on page 10 “Connecting to the Reciter/PA in the Subrack” on page 11 Reciter Inside/Outside Procedure... -
Page 13: Connecting To The Reciter/Pa In The Subrack
Using the power cable supplied in the calibration test kit, connect the reciter to the 10-30 V DC power supply, but do not power it up yet. 3. Start the TB8100 Calibration Kit program, and check that the correct COM port is selected. -
Page 14: Disconnecting From The Base Station/Reciter
The file is saved in the Logfiles folder (..\Program Files\Tait Programming Applications\TB8100 Service Kit\LogFiles), and stores up to 1000 of the most recent logged items. Verifying the If you need to verify the version of the TB8100 Calibration Kit, select Help > Software Version About. MB8100-90-00-806 © TEL 2003... -
Page 15: Adjusting The Frequency Setup
Adjusting the Receiver Lock Band The first step in preparing the TB8100 base station for operation is to adjust the receiver lock band (switching range). The lock band is the range of frequencies that the base station receiver or transmitter is calibrated to operate on. -
Page 16: Tuning The Receiver
Tuning the Receiver The second step in tuning the reciter frequency is to tune the receiver front end. Tuning the receiver flattens the receiver’s response across its lock band (switching range). To help you do this, there is a graph of the RSSI readings in step two of the Tune Receiver Front End Wizard. -
Page 17: Adjusting The Exciter Lock Band
VCO on the band you want. Click Finish. Once you have finished adjusting the exciter lock band, the icon on the Frequency Setup tab indicates that this task is complete. TB8100 Calibration Kit User’s Manual Adjusting the Exciter Lock Band 15... - Page 18 MB8100-90-00-806 © TEL 2003 16 Adjusting the Exciter Lock Band...
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Page 19: Calibrating The Reciter
Important: and Tait engineers perform these procedures. Advanced All the commands sent and received by TB8100 Calibration Kit are saved in a Troubleshooting file called “CCTM.log”. The date, time, command number, and parameters are all stored in this file, which may be helpful when troubleshooting. -
Page 20: Calibrating The Vco Modulation
Calibration test unit (CTU) Modulation meter RF attenuator (only required if you are using a PA) Setup Reciter RF attenuator (only required if using a PA) PA (optional) Modulation meter To calibrate the FCL modulation 1. Ensure you are already connected to the reciter. -
Page 21: Calibrating The Rssi
Ensure that the receiver’s lock band has already been adjusted to the required setting before carrying out this procedure. (See “Adjusting the Receiver Lock Band” on page 13.) Equipment RF signal source TB8100 Calibration Kit User’s Manual Calibrating the RSSI 19... - Page 22 Setup RF signal source Reciter To calibrate the RSSI 1. Ensure you are already connected to the reciter. 2. Select the Reciter Calibration tab, and double-click RSSI Calibration. The RSSI Calibration Wizard appears. 3. Apply a signal (modulated at 1 kHz tone, 3kHz deviation peak) at the base station’s center frequency, and then click Next.
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Page 23: Audio Calibration
Calibrating the balanced lines adjusts their gain, so that when you set line levels using the TB8100 Service Kit software, the actual line level correctly reflects the Service Kit settings. (Refer to the TB8100 Service Kit User’s Manual for further information.) -
Page 24: Calibrating The Unbalanced Lines
Calibrating the unbalanced lines adjusts their gain, so that when you set line levels using the TB8100 Service Kit software, the actual line level correctly reflects the Service Kit settings. (Refer to the TB8100 Service Kit User’s Manual for further information.) -
Page 25: Calibrating The Tcxo
Celsius. Complete the calibration as quickly as possible since extended transmission times increase temperature, which makes the calibration less accurate. Equipment Frequency counter RF attenuator (only required if you are using a PA) TB8100 Calibration Kit User’s Manual Calibrating the TCXO 23... - Page 26 The accuracy of the calibrated TCXO frequency is only Important: as good as the accuracy of the frequency counter. Setup Reciter RF Attenuator pad (optional) PA (optional) Frequency counter To calibrate the TCXO 1. Ensure you are already connected to the reciter.
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Page 27: Calibrating The Power Amplifier
Calibrating the Forward and Reverse Detector Bias Voltages Important: It is recommended that only accredited service centers and Tait engineers perform these procedures. Note: The PA is calibrated by the microprocessor via the Calibration Kit. You do not need to make any manual adjustments. -
Page 28: Calibrating The Pa Power
Calibrating the PA Power Before you perform this procedure, you must calibrate Important: PA bias and the forward and reverse detector bias voltages. The PA power control loop is calibrated at a single frequency, generally in the center of the operating band. Factory calibration is performed at 460 MHz. -
Page 29: Troubleshooting Tips
PA front panel and the ‘N’ type output connector from the rear of the PA. Click Finish. When you have finished, the icon on the PA Calibration tab indicates that this task is complete. TB8100 Calibration Kit User’s Manual Calibrating the Forward and Reverse Detector Bias Voltages 27... - Page 30 MB8100-90-00-806 © TEL 2003 28 Calibrating the Forward and Reverse Detector Bias Voltages...
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Page 31: Index
Tune Receiver Front End Wizard defining range of Unbalanced Line Calibration Wizard modulating reference frequency VCO Band Tuning Wizard frequency counter COM port see equipment control voltage front end helical filters coupler fwd voltage tuning TB8100 Calibration Kit User’s Manual Index 29... - Page 32 tuning holes for details off-frequency tuning the frequency Reference DAC resonators gate bias voltage see front end helical filters reverse detector calibrating bias voltage RF attentuator lock band see equipment definition RF detectors see exciter RF signal source see receiver see equipment log files RMS (root means squared)
- Page 33 VSWR VSWR (Voltage Standing Wave Ratio) TB8100 Calibration Kit User’s Manual Index 31...
- Page 34 MB8100-90-00-806 © TEL 2003 32 Index...
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