AS9100 Rev D/ISO 9001:2015 Certified
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TFM-550 Airborne VHF/UHF High/Low Band FM Transceiver
(DAI Part# TFM550G)
This transceiver covers VHF low band from 30 to 50 MHz in 2.5 KHz steps, VHF high band from 138 to 174 MHz in 2.5 KHz increments and UHF from 403 to 512 MHz also in 2.5 KHz steps.
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SPECIFICATIONS
Active Frequency Coverage 30.000 to 50.00 MHz, 138.000 to 174.000 MHz & 403.000 to 512.000 MHz
Tuning Increments 2.5 KHz, all 3 bands
Operating Mode F3E simplex or semi-duplex
Memory Positions 600 channels total (200 each band
Dimensions Approx. 8.0” D. x 3.75” H. x 5.75” W.
Weight 5.1 lbs. (2.3 kg)
Temperature Range -45°C to +70°C
Altitude 50,000’
Power Requirement 28VDC, 850 mA receive; 3.4 AMPS, 2 transmitters, 10 watts; 1.8 AMPS, 2 transmitters, 1.0 watt
1.4 AMPS, 1 transmitter, 1 watt; 2.2 AMPS, 1 transmitter, 10 watts
Certification FCC & DOC type approved
RTCA DO-160C Environmental Categories (B2,D1)XXX(B,M,N)XXXXXXABBXXXZXXX
CTCSS Squelch Capability Encodes/decodes all 64 available tones
DPL/DCS Capability Encodes/decodes all available digital squelch codes
DTMF Encoder All standard DTMF tones supported
Audio Output 500 mW into 600 OHMS
Audio Distortion < 5%
Speaker Output 2.5 watts into 4 OHMS
Back Lighting 28VDC (standard) or 5V (specify
Display Green (standard), red optional (specify)
Transmitters
Transmit RF Power Output 1 watt or 10 watts, front panel selectable, all bands
Maximum Deviation Limited to 2.5 KHz for 12.5 KHz channels & 5 KHz for 25 KHz & 30 KHz channels
Spurious Attenuation -90 dB below carrier level
Frequency Stability + 0.00025%
Microphone Circuit Carbon or equivalent
Sidetone Output 500 mW maximum into 600 OHMS
Harmonic Attenuation -65 dB below carrier level
FM Hum & Noise -40 dB
Audio Input 50 mV @ 2.5 KHz into a 200 OHMS circuit for + 3.5 KHz (25 KHz mode), adjustable
50 mV @ 2.5 KHz into a 200 OHMS circuit for + 2.0 KHz (12.5 KHz mode), adjustable
Audio Distortion < 5%
Transmitter Output Impedance 50 OHMS
Maximum Deviation Limited to 2.5 KHz for 12.5 KHz channels & 5.0 KHz for 25 KHz channels
Receivers VHF Low Band VHF High Band UHF Band
Frequency Range 30.000 MHz to 50.000 MHz 138.000 MHz to 174.000 MHz 403.000 MHz to 512.000 MHz
Tuning Increments 2.5 KHz 2.5 KHz 2.5 KHz
Operating Mode F3E simplex or semi-duplex F3E simplex or semi-duplex F3E simplex or semi-duplex
Channel Spacing 12.5 KHz or 25 KHz
As per applicable FCC & IC type approvals
12.5 KHz, 25 KHz or 30 KHz 12.5 KHz, 20 KHz or 25 KHz
Memory Positions 200 channels 200 channels 200 channels
Sensitivity @ 12 dB SINAD > 0.35 mV > 0.35 mV > 0.35 mV
Adjacent Channel -70 dB (25 KHz) -78 dB for 25 KHz, -70 dB for 12.5 KHz -70 dB for 25 KHz, -70 dB for 12.5 KHz
Spurious Attenuation -80 dB -90 dB -90 dB
Third Order Intermod -70 dB 70 dB -70 dB
Image Attenuation -80 dB -80 dB -70 dB
FM Acceptance + 6 KHz + 6 KHz + 6 KHz
Hum & Noise > 40 dB > 50 dB > 40 dB
Audio Distortion < 5% < 5% < 5%
Ant Conducted Emission < -80 dBm < -70 dBm < -70 dBm
Note: Specifications are subject to change without notice–DPL is a trademark of Motoroloa Corporation