Audio Frequency Response
Measured at the loud speaker for a constant deviation at 20% of maximum.
Within +l dB to -3dB of -6dB per octave de-emphasis relative to 1 kHz over 300Hz to 3000Hz,
CTCSS not fitted.
With CTCSS fitted within +1.5 to -3dB.
Audio Output
i) 4 watts into 4 ohms, less than 10% THD with 1kHz at 60% maximum deviation.
ii) 16 watts into 4 ohms, optional.
Audio Distortion
Less than 5% THD for 300mW into 4 ohms, 1kHz at 60% deviation.
Mute Response Time
Mute set to open at 20dB SINAD.
Response for 1 uV RF level; less than 40mSec.
Mute Range
Channel Spacing 12.5kHz 25kHz
maximum 18 to 20dB 20 to 25dB SINAD.
Minimum l0dB l0dB SINAD.
2.3 TRANSMITTER
Power Output
Adjustable; 1 to 6 watt, 1 to 25 watt, 10 to 40 watt.
Spurious Emission
Less than 0.25uW 100kHz to 1GHz, less than 1uW 1GHz to 4GHz.
Residual Hum and Noise
Greater than 40dB (Reference 1 kHz at 60% deviation. DC to 25kHz bandwidth CCITT
weighted and 6dB/octave de-emphasis).
Microphone Sensitivity
Less than 20mV rms at 1 kHz to achieve 60% maximum deviation. Standard sensitivity
setting, 40mV +/-10%; Optional setting, 5mV
Audio Distortion
Less than 3%. Reference 1kHz at 60% deviation.
Section 2 Page 4
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