TM8000 Mobile Radio Accessories Manual TMAA01-01 Line-Interface Board 17March 2004 © Tait Electronics Limited2 TMAA01-01 Line-Interface BoardThe TMAA01-01 line-interface board provides both audio and digitalinterfaces for a variety of systems. The interfaces available are: an isolated 600Ω audio interface which is capable of bothsimplex operation on a two-wire system, or duplex operation ona four-wire system a keying interface which allows for two-wire keying or singleline bi-directional keying a variable delay timer a logic sense control.The line-interface board fits inside the radio in the options cavityand is connected to the main PCB by the internal options loom.The high-density 15-way D-range connector mounted on the line-interface board fits through the external options connector holeprovided in the radio chassis.2.1 OperationOne of the control head function keys may be programmed to toggle theline-interface board on and off. When the function key LED is glowing,the line-interface board is on and when the LED is off, the line-interfaceboard is off.Refer to “Programming Information” on page 23 for information on theradio programming procedure.2.2 Configuring the Line-Interface BoardImportant This equipment contains devices which are susceptible todamage from static charges. Refer to “ESD Precautions”on page 13 for more information.Important The radio does not meet the IP54 protec-tion standard once a line-interface boardhas been installed unless the externaloptions cover seal is installed.external optionsconnectorinternal optionsconnectorD-range hoodpartsD-range plugline-interface boardline-interfaceinstallation partsinternal optionsloomexternal optionscover seal
