ZHC368 FM Radio Modulator
Overview:
ZHC368D FM Stereo Broadcast Modulator is an excellent software radio product with excellent performance. The whole modulator 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.
The modulator is composed of five parts: main control display, audio interface, digital signal processing, remote control telemetry interface and power supply. The modulator is installed in a 19-inch 1U standard case, and all input and output signals are led out from the rear panel.
Features:
● The whole process is digitally processed to achieve a perfect hearing effect close to the sound quality of CD
● Using new 550MHz digital signal processing (DSP) technology
● 1000MHz direct digital frequency (DDS) synthesis technology
● Using highly reliable system-on-chip (SOC) microprocessor technology
● Support AES/EBU standard digital audio input
● Support RDS subcarrier input
● LCD display working parameters in real time
● Standard TCP/IP and RS232/485 serial communication remote control telemetry interface
● High-quality aluminum alloy, 1U, 19-inch standard case
● Input power AC 220V/110V can be switched
Technical Specifications:
1. RF frequency range 87MHz ～ 108MHz in 10kHz steps
2. Output level -30dBm ～ 10dBm continuously adjustable
3. Output impedance 50Ω
4. RF output level display LCD
5. RF output connector BNC
6. Residual wave radiation <-60dB
7. Parasitic amplitude modulation < -50dB
8. Allowable deviation of carrier frequency ± 200Hz
9. Analog audio input -12dBm ～ + 8dBm
10. Audio level gain -15dB ～ + 15dB step 0.1dB
11. Analog audio input impedance 600Ω balanced
12. AES / EBU input impedance 110Ω balanced
13. AES / EBU input level 0.2 ～ 10Vpp
14. AES / EBU sampling rate 30kHz ～ 96kHz
15. SCA input unbalanced (option) BNC type connector
16. Audio pre-emphasis 0μs, 50μs, 75μs
17. Frequency response ± 0.01dB (30Hz ～ 15000Hz)
18. Left and right channel level difference <0.01dB (100% modulation)
19. Stereo resolution ≥70dB (30Hz ～ 15000Hz)
20. Stereo signal-to-noise ratio ≥90dB (1KHz, 100% modulation)
21. Distortion <0.01% (30Hz ～ 15000Hz)
22. Power supply voltage AC90V ~ AC132V or AC180V ~ AC260V
23. Chassis size 19 inches, 1U (484mm × 305mm × 44mm)
24. Machine weight 4kg
25. Operating ambient temperature -5 ℃ ～ + 50 ℃
26. Relative humidity <95%
