Tait TM8260 Installation And Programming Manual

Also see for TM8260: Operator's manual Operator's manual User guide Getting started guide

Tait TM8260 Installation And Programming Manual Manual pdf 36 page image

36 Installing a Dual-Radio System TM8260 Installation and Programming Guide© Tait Limited October 20143.10 Checking the InstallationWarning Danger of fire! The radio’s protection mechanismsrely on the correct fuses on both the negative and positive powersupply leads being present. Failure to fit the correct fuses mayresult in fire or damage to the radio.The correct fuse types are:■ >25W radios: 20A fuses (Tait IPN 265-00010-81)■ 25W radios: 10A fuses (Tait IPN 265-00010-80)1. Insert the fuses into the power leads. The radio will turn on automat-ically at this point.2. Switch the radio off then on again using the front panel control, butdo not transmit.3. Connect an in-line power meter between one radio and its antenna.4. Transmit and measure the forward and reflected power levels.Less than 4% of the forward power should be reflected. If this is notachieved, check the installation, including the antenna length.5. Start reducing the length of the antenna in steps of 0.1 inches to0.2 inches (2 to 5 mm). Measure the power levels at each step.Notice Some antennas are pre-tuned and must not be cut. Check withthe manufacturers’ instructions.6. Once the reflected power levels are within tolerance, repeat steps 3, 4and 5 for the second radio.7. Test the dual-radio functions.■ Compare the receive functions (such as sensitivity) of one radio,while the other radio is and is not transmitting. Ensure there is nosignificant difference.■ Compare the transmit functions (such as coverage) of one radio,while the other radio is and is not transmitting.■ Test all other functions, such as dual-receive and cross-bandrepeater operation. Check that those functions operate asexpected.If issues are found, move the radio bodies and/or antennas furtherapart and re-test.>25W 25W