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TM8000 Mobile Radio Accessories Manual TMAA01-01 Line-Interface Board 17
March 2004 © Tait Electronics Limited
2 TMAA01-01 Line-Interface Board
The TMAA01-01 line-interface board provides both audio and digital
interfaces for a variety of systems. The interfaces available are:
■
an isolated 600
Ω
audio interface which is capable of both
simplex operation on a two-wire system, or duplex operation on
a four-wire system
■
a keying interface which allows for two-wire keying or single
line bi-directional keying
■
a variable delay timer
■
a logic sense control.
The line-interface board fits inside the radio in the options cavity
and 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 hole
provided in the radio chassis.
2.1 Operation
One of the control head function keys may be programmed to toggle the
line-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-interface
board is off.
Refer to “Programming Information” on page 23 for information on the
radio programming procedure.
2.2 Configuring the Line-Interface Board
Important
This equipment contains devices which are susceptible to
damage 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 board
has been installed unless the external
options cover seal is installed.
external options
connector
internal options
connector
D-range hood
parts
D-range plug
line-interface board
line-interface
installation parts
internal options
loom
external options
cover seal