M850-00
T856/857 Functional Testing
C4.7
Copyright TEL 31/09/98
4.6 Audio Level Input Sensitivity
• Adjust RV210 (line sensitivity) fully clockwise.
• Check that the input sensitivities are better than those specified below:
Note:
A degraded signal to noise ratio can be expected with the compressor
selected. The extent of the degradation is dependent on the audio input
level.
Line Input 600 ohms, ±3kHz (±2.4kHz) [±1.5kHz] deviation at
1kHz:
with compressor -50dBm
without compressor -30dBm
Microphone Input 600 ohms, ±3kHz (±2.4kHz) [±1.5kHz] deviation at
1kHz:
with compressor -75dBm
without compressor -55dBm
CTCSS Input 1kHz deviation at 150Hz 500mV rms
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