26
TMAA01-01 Line-Interface Board
TM8000 Mobile Radio
Accessories Manual
March 2004
© Tait Electronics Limited
2.7
Line-Interface Board Specifications
Input Voltage
10.8V to 16VDC
Operating Temperature Range
-10
°
C to +60
°
C ambient
DC Input Current
<40mA total (+13.8V supply)
Line Input Sensitivity (60% deviation)
-20dBm to +6dBm (600
Ω)
Line Output Level (60% deviation)
-20dBm to +6dBm (600
Ω
)
Line Impedance
600
Ω
Return Loss (300Hz to 3kHz)
>20dB relative to 600
Ω
Line Output Filter Response (stopband)
2 pole
6 pole
-12dB/octave, f >4kHz
-36dB/octave, f >4kHz
2.7.1
Radio With Line-Interface Board: Re Line Output
Receiver Frequency Response*
Receiver Processed
Bandwidth
Response
Receiver Unprocessed
*relative to 1kHz, 60% deviation
300Hz to 3kHz (standard
400Hz to 3kHz (CTCSS)
+1, -3dB relative to -6dB/octave
+1, -3dB (300Hz to 3kHz)
Test Signal
-46dBm RF*, 0dBm line output,
audio tap T4
*60% deviation at 1kHz
Signal-to-Noise Ratio
Narrow Band
Wide Band
>40dB
>43dB
Mute Ratio
>60dB
Distortion*
Narrow Band
Wide Band
*30kHz band width distortion meter
<4%
<4%