Introduction: The ZHC618F series of FM stereo transmitters (exciters) is an excellent software radio product with excellent performance. The whole machine adopts new digital signal processing (DSP) and direct digital frequency synthesis (DDS) technology. With the advantages of digital processing technology, it provides users with a perfect listening experience close to CD sound quality. ZHC618F series FM stereo broadcast transmitter (exciter) consists of main control display, audio interface, digital signal processing, power amplification, remote telemetry interface and power supply. The unit is housed in a 19-inch 2U standard chassis, and all input and output signals are taken out from the rear panel. Features: 1. Digital processing throughout the process to achieve a perfect auditory effect close to CD quality 2. Adopt new 550MHz digital signal processing (DSP) technology 3. Using 1000MHz direct digital frequency (DDS) synthesis technology 4. Using high reliability system-on-a-chip (SOC) microprocessor technology 5. Support AES/EBU standard digital audio input 6. Support SCA subcarrier input 7. Electronically controlled AGC controls output power zero drift 8. Perfect over-current, over-voltage, over-temperature, over-power, standing wave ratio alarm and protection function 9. Large-screen LCD displays operating parameters in real time 10. With TCP / IP, CAN and RS232 communication interface and SMS cat interface 11. High quality stainless steel, dust filter, 2U, 19 inch standard chassis Technical Parameters: 1. RF frequency range 87MHz～108MHz Step 10kHz (other frequencies can be customized) 2. Output power 0～50W continuously adjustable 3. Output power stability ±3% (ambient temperature -5 °C ~ +45 °C) 4. Output impedance 50Ω 5. RF output connector N-50K 6. In-band residual wave <-70dB 7. Higher harmonics <-60dB 8. Parasitic amplitude modulation <-50dB 9. Carrier frequency tolerance ±200Hz 10. Analog audio input -12dBm ~ +8dBm 11. Audio level gain -15dB ~ +15dB step 0.1dB 12. Analog audio input impedance 600Ω balance 13.AES/EBU input impedance 110Ω balance card 14.AES/EBU input level 0.2~10Vpp 15.AES/EBU sampling rate 30kHz～96kHz 16.SCA input Unbalance (option) BNC type connector 17. Audio pre-emphasis 0μs, 50μs, 75μs 18. Frequency response ±0.1dB 19. Left and right channel level difference <0.1dB (100% modulation) 20. Stereo resolution ≥50dB 30Hz～15000Hz 21. Stereo signal to noise ratio ≥70dB 1KHz, 100% modulation 22. Distortion <0.1% 30Hz～15000Hz 23. Heat dissipation method Forced convection 24. Power supply voltage AC90V ~ AC265V 47Hz ~ 63Hz 25. Chassis size 19 inches, 2U (500mm × 484mm × 88mm) 26. Machine weight 18kg 27. Operating environment temperature -5 ° C ~ +45 ° C 28. Relative humidity <95%
Introduction: The ZHC618F series of FM stereo transmitters (exciters) is an excellent software radio product with excellent performance. The whole machine adopts new digital signal processing (DSP) and direct digital frequency synthesis (DDS) technology. With the advantages of digital processing technology, it provides users with a perfect listening experience close to CD sound quality. ZHC618F series FM stereo broadcast transmitter (exciter) consists of main control display, audio interface, digital signal processing, power amplification, remote telemetry interface and power supply. The unit is housed in a 19-inch 2U standard chassis, and all input and output signals are taken out from the rear panel.
