M-tech MT-550 - Page 58

MT-550 57
TRANSMITTER
Power Output: 25 Watts or 1 Watt switchable.
Tx Current: 6 Amps @ 25W Tx.
1 Amp @ 1W Tx.
Modulation: G3E for Voice, G3B for DSC Data.
Transmit Frequencies: 156.025Mhz - 157.425Mhz @ 25Khz spacing.
Spurious/Harmonic Emissions: Less than 0.25µW.
Modulation Distortion: Less than 4% @ 1Khz for +/-3Khz deviation.
Modulation Limiter: +/-5Khz deviation with 100% modulation.
Frequency Response: Matches +6dB/Octave slope within +1/-3dB
from 300 to 2500Hz.
18dB/Octave beyond 3000Hz. Audio Low
Pass Filter is included.
Hum & Noise: Less than -40dB.
RECEIVER
Receive Frequencies: 156.300Mhz - 162.000Mhz @ 25Khz spacing.
Sensitivity: 0.5µV or less for 20dB SINAD
Squelch Range: 0.25µV to 0.80µV @ full squelch
Audio Output Power: 3.0W minimum @ 4 Ohms with less than 10%
distortion.
Receiver Current: 300mA in Standby.
Modulation Acceptance: +/-7 kHz minimum.
Adjacent Channel Selectivity: Less than -70dB for +/-25Khz.
Image Rejection: Less than -70dB.
Intermodulation Spurious
Response: Less than -70dB.
Noise Level: Less than -40dB unsquelched.
Audio Frequency Response: Matches -6dB/Octave slope within +1/-3dB
from 300 to 2500Hz, 18dB/Octave over
3000Hz.
RECEIVER (for AIS)
Receive Frequencies: 161.975Mhz (AIS1) and 162.025Mhz (AIS2).
Sensitivity: 1µV or less.
Image & Spurious Rejection: Less than -70dB.
Local Oscillator Mode: PLL.