CONSORCIO EFM SAC Empresa de Comunicaciones

TM-742AD

CARACTERISTICAS

101 memory channels & memory banks system
Flexible scan and scan stop modes
The tone alert system can be activated independently for each band
Automatic band change
Sub-band muting circuit
Cross band repeater function
144 MHz/440MHz/Open Band
TM-642AD 144/220 MHz version available

ESPECIFICACIONES

Antenna Impedance 50 ohms

Current Drain Recieve 1.2 A

Current Drain Transmit 144 MHz: Less than 11.5 A
440 MHz: Less than 10.0 A

Dimensions (W x H x D) 5-7/8 x 1-15/16 x 6-7/8in (150 x 50 x 175 mm)

Frequency Range 1200 MHz (option)

Frequency Range 144 MHz TX: 144 - 148 MHz
RX: 118 - 174 MHz

Frequency Range 220 MHz (option)

Frequency Range 28 MHz No Longer Available

Frequency Range 440 MHz TX: 438 - 450 MHz
RX: 410 - 470 MHz

Frequency Range 50 MHz (option)

Ground Negative

Microphone Impedance 600 ohms

Mode F3E (FM) (A3E (AM) RX: 118 - 136 MHz)

Operating Temperature Range -20°C - -60°C

Power Requirement 13.8 V DC ±15%

Weight (approx.) 3.3 lb (1.5 kg)

Receiver

Audio Output Power More than 2 W (8 ohms, 5% distortion)

Circutrity Double conversion superheterodyne

Intermediate Frequency 1st IF 144 MHz: 10.695 MHz
440 MHz: 21.6 MHz

Intermediate Frequency 2nd IF 455 kHz

Selectivity -6 dB Greater than 12 kHz

Selectivity -60 dB Less than 24 kHz

Sensitivity (12dB SINAD) Less than 0.16 µV

Squelch Sensitivity Less than 0.1 µV

Transmitter

Frequency Tolerance ±10 ppm

Maximum Frequency Deviation ±5 kHz

Modulation Reactance

Modulation Distortion Less than 3 % (300 Hz - 3 kHz)

RF Output Power HI 144 Mhz: 50 W
440 MHz: 35 W

RF Output Power LO 5 W

RF Output Power MID 10 W

Spurious Radiation Less than -60 dB

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