Tait TB8100 User Manual

Also see for TB8100: Installation and operation manual Operation manual User manual Installation guide User manual

Tait TB8100 User Manual Manual pdf 14 page image

9 Adjusting the Receiver Lock Band © Tait Electronics Limited April 2006Adjusting the Frequency SetupBefore the TB8100 base station is installed, connected, and configured, youmust prepare it for operation by adjusting the switching range of the receiver,optimising the receiver response across the switching range, and adjusting theexciter lock band or selecting an exciter sub-band.Note: If the required switching range for the base station has alreadybeen defined, you don’t need to perform these procedures.Tip: Use the TB8100 Service Kit to monitor the base station andfind out its current switching range.Important: Be careful when using the tuning tools. Applying toomuch pressure or attempting to turn the tool beyond the end of therange can crack the tuning slug. Unscrewing a slug too far canremove it completely.Adjusting the Receiver Lock BandThe first step in preparing the TB8100 base station for operation is to adjust thereceiver lock band (switching range). The lock band is the range of frequenciesthat the receiver is calibrated to operate on.Equipment ■ Murata tuning tool■ CTUTo adjust the receiver lock band1. Remove the reciter from the subrack. (For instructions, see the Installationand Operation Manual.)2. Connect the Calibration Kit to the reciter (see “Connecting to a ReciterOutside the Subrack” on page 5).3. Select the Frequency Setup tab, and double-click Set Receiver VCO. TheSet Receiver VCO Wizard appears. The display varies, depending on thereciter band.4. Enter the Center Frequency (which must be a multiple of 500 kHz) of thelock band that you want to use, and click Next.5. Insert the Murata tuning tool into the correct receiver VCO tuning hole forthe reciter type (see below) and then click Next.6. Adjust the receiver VCO trimmer until the actual band matches the desiredband. The bands turn green.7. Click Finish. This stores the lock band in the reciter.The icon on the Frequency Setup tab indicates that this task is com-plete. Proceed to tune the front end.