User's Manual

1-4
SECTION 1
GENERAL DESCRIPTION
1.1 DESCRIPTION
The TDFM-7300 is an airborne low band VHF FM transceiver capable of operating between 30 and 50 MHz.
1.2 TECHNICAL CHARACTERISTICS
Specification
Characteristic
Model Designation: TDFM-7300
Physical Dimensions: Approx. 3.75" X 5.75" X 8.0”
Weight: ~6.0 lbs. (2.7 kg)
Operating Temperature Range: -30°C to +60°C
Power Requirement:
Voltage: 28.0 Vdc, ± 15%
Current: 500mA minimum / 5A maximum
Audio Output Power (including sidetone): 600 mW into 600 ohms
Microphone Inputs: Carbon or Equivalent
Panel Back Lighting:
Voltage: 28 VDC or 5VAC (selectable)
Current: 10 uA
General
Memory Positions: 200
Tuning Increments: 2.5 kHz
Wide Band Channel Spacing: 20 kHz
Operating Mode: FM (F3E)
PL / CTCSS Tones: All Standard Tones RX & TX
DPL / DCS Codes: All Standard Codes RX & TX
DTMF: Transmit Encoder Only
Transmitter section VLO
Frequency range: (MHz) 30 – 50
Power Output: (Watts) 1 or 10 max.
Harmonic Attenuation: (dBc) -65
FM Hum and noise in dB (wideband): -40
Audio Distortion: <5%
Frequency Stability (ppm): ±2.5
Modulation Limiting ± 5 kHz