General Information
3
MT-3 FM Transmitter Mainboard Instruction Manual
IM20-MT3TXMN
mt-3 VHf low Band PerformanCe SPeCIfICatIonS
Parameter
Specification
Frequency Range:
29 to 38 MHz (VT-3H035-SWA300)
38 to 50 MHz (VT-3H045-SWA300)
Carrier Frequency Stability:
± 5.0 ppm (-30°C to +60°C, Optional -40°C to +60°C)
Channel Spacing:
20 kHz
Channel Selection:
5.0 or 6.25 kHz increments
Number of Channels:
16
Compatibility:
MT-3 Series Radio Systems
RF Output Power:
0.5 to 3.0 W
Emission Designator:
16K0F3E
Impedance (Input):
50 Ω; Type-N connector
Duty Cycle:
100 % (-40°C to +60°C)
Undesired Emissions (Conducted Harmonics):
Undesired Emissions (Conducted Spurious):
<= -90 dBc
<= -80 dBc
VSWR Protection:
< 20:1 VSWR at all phase angles
Operating Temperature Range:
-30°C to +60°C
Operating Humidity:
95% RH (non-condensing) at +25°C
Operating Voltage:
+13.8 VDC nominal input (range +10 to +17 VDC)
+9.5 VDC regulated
Transmit Current:
<1.2 A for 3.0 W output
Stand By Current:
15 mA (Mode 1)
160 mA (Mode 2)
185 mA (Mode 4)
PTT Time-Out-Timer:
Nominal – 5 minutes
Range – 1 sec to 8 hours, disable
Audio Input:
600 Ω balanced or unbalanced input (5 K Ohm)
-25 dBm to 0 dBm
Audio Frequency Response:
Pre-emphasis: complies with TIA-603C
Flat: +1 dB/-3 dB 100 Hz to 3 kHz
Audio Deviation Limiting:
± 5.0 kHz
Audio Distortion:
<2.0% @ +23°C
<2.5% -40°C to +60°C
FM Hum and Noise Ratio:
<= -55 dB (0.3 to 3.4 kHz, de-emphasis off)
IC Certification No.:
142A-VT3X0X5S (RSS-119)
FCC ID:
H4JVT-3H040-S (FCC Parts 22, 90)
