8 TA2922 Universal Line Interface Service Manual
© Tait Electronics Limited March 2010
Data equipment such as a GPS receiver or Computer Controlled Data Interface
(CCDI) is able to be connected to the TA2922 at the same time as the audio
interface is used.
The built in low voltage monitor alarm can be used to send a status message or
Selcall to advise a remote monitoring station of a potential power supply issue.
The TA2922 can be used together with conventional, MPT1327 trunked or P25
radio modes of operation.
1.2 Specifications
Power supply input voltage 10.8 - 16.0VDC, negative ground
Power supply input current 30mA nominal
Over current protection 300mA self-resettable poly-switch fuse
Line out level -30dBm to +10 dBm
Line out impedance 600 ohms
Line in level -30dBm to +5dBm
Line in impedance 600 ohms
PTT in Opto coupled, non polarised, 10 to 50V input range
Gate out Voltage free (normally open) relay contacts. Relay contacts
rated 1A @ 50V DC
PTT in direct Active Low (pull to Ground)
Gate out direct Active low, open collector, 70mA max
EXT_GPIO3 to 7 Five bi-directional digital I/O lines, active low
Input range 0 to 3.3V (3.6V max)
Output range 0 to 3.3V @ 2mA
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