Tait TM8000 Series

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 (600Ω)
Line Output Level (60% deviation) -20dBm to +6dBm (600Ω)
Line Impedance 600Ω
Return Loss (300Hz to 3kHz) >20dB relative to 600Ω
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: Receiver + 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%