FMT 5.0 87.5-108MHz 600W FM Transmitter FMT5-600H

Overview

This transmitter employs an integrated design, incorporating the exciter, poweramplifier, output filter, and switching power supply into a standard 2U 19‑inch rack‑mount chassis. This compact and efficient layout reduces internal cabling, contributes to system efficiency, and ensures reliable, friendly operation.

Key Features

• Digital LCD Touch panel –LCD touch panel offering simple and direct operation interface.
• Convenient System Monitoring – The display shows all key operating parameters, including frequency, stereo/mono mode, volume, amplifier MOSFET temperature, audio VU meter, forward/reflected power, modulation mode and pre‑emphasis status.
• Standardized Mechanical Design – 2U 19‑inch aluminum alloy enclosure provides structural strength and efficient heat dissipation.
• Stable Frequency Generation – A high‑precision PLL system maintains long‑term frequency stability with no drift.
• Integrated Stereo Encoder – Built‑in high‑quality stereo encoder for excellent audio performance.
• Advanced Power Control – Precise AGC balancing allows output poweradjustment from 0% to 100% and maintains the set level under varying input.
• External Signal Support – Compatible with externally modulated RDS or SCAinputs.
• Digital Audio Input – Support AES/EBU digital input with 24‑bit/192 kHz sampling.
• Rugged RF Amplification – LDMOS‑based power amplifier sustains load mismatch up to 65:1 VSWR at 5 dB compression point.
• Fault Logging – Automatically records recent system alarms to assist in diagnostics and maintenance.

Specifications

RF Section

• Frequency Range: 87.5 – 108 MHz
• Frequency Step: 10 kHz
• RF Output Power: 0 – 600 W (±0.5 dB)
• Modulation Mode: FM (Peak Deviation ±75 kHz)
• Frequency Stability: <±100 Hz
• Frequency Synthesis: PLL (Phase-Locked Loop)
• Spurious Emissions (In-band): < -70 dB
• Harmonic Suppression: < -65 dB
• Parasitic AM: < -79 dB
• RF Output Impedance: 50 Ω
• RF Output Connector: N-type (L16) Female
• RF Efficiency: >78%

Audio Input Section

• Analog Audio Input Level: -12 dBm to +8 dBm
• Analog Audio Input Connector: Balanced XLR (3-pin)
• Analog Audio Input Impedance: 600 Ω (Balanced)
• Digital Audio Input (Coaxial): BNC, 75 Ω
• Digital Audio Input (AES/EBU): XLR, 110 Ω (Balanced)
• AES/EBU Input Level: 0.2 – 10 Vpp
• AES/EBU Sampling Rate: 30 kHz – 192 kHz, 24-bit
• RDS/SCA Input: Unbalanced BNC
• RDS/SCA Input Gain Range: -15 dB to +15 dB (0.5 dB steps)
• Audio Input Gain Range (Common): -15 dB to +15 dB (0.5 dB steps)

Audio Performance

• Pre-emphasis: 0 μs / 50 μs / 75 μs (User Selectable)
• Frequency Response: 30 Hz – 15 kHz (±0.1 dB)
• Stereo Separation: >50 dB (1 kHz)
• Signal-to-Noise Ratio (Stereo): >70 dB (30 Hz – 15 kHz)
• Signal-to-Noise Ratio (Mono): >75 dB (30 Hz – 15 kHz)
• Harmonic Distortion: <0.05%

Power & Environmental

• Power Supply: Single-phase AC, 110 – 260 V
• Maximum Power Consumption: <1000 VA
• Operating Temperature: -20 °C to +45 °C
• Cooling Method: Forced Air
• Operating Humidity: <95% RH (Non-condensing)
• Maximum Operating Altitude: 4500 m

Mechanical

• Dimensions (W x D x H): 483 x 320 x 88 mm (19” rack width, excluding handles and protrusions)
• Rack Mount: Standard 2U, 19-inch
• Weight: 11 kg