1kw FM Radio Transmitter Fpga+Dds Technology

Basic Info

Model NO.	ZHC618F-1000W/Light
Distortion	<0.01%
Transport Package	Box
Specification	2U
Trademark	ZHC
Origin	China
HS Code	852500000
Production Capacity	100/Month

Product Description

ZHC618F-1000W Light FM Stereo Transmitter

1. Overview
ZHC618F-1000W/LIGHT stereo FM radio transmitter is an integrated high-quality FM transmitter that stereo-encodes the input left and right channel audio signals and adjusts the FM modulation to the broadcast band, then RF amplify to the 1000W output power for wireless broadcasting. The transmitter adopts the most advanced software radio technology to achieve the international leading level of product performance indicators.

With a new large-scale field-programmable gate array (FPGA) and direct digital frequency synthesis (DDS) technology at up to 5G, the product achieves the highest technical specifications in the industry to date, providing listeners with a CD-like sound experience.

The product consists of audio interface unit, digital processing and frequency modulation unit, RF power amplifier unit, human-machine interface unit, communication interface unit, clock synchronization unit and power supply unit. The transmitter is installed in a 19-inch 2U standard chassis, intensive design, small size and light weight. The whole transmitter is designed with high reliability, which makes the product run continuously and stably for a long time.

2. Technical characteristics and principle block diagram
Product technology has the following technical features:
• Full process digital processing to achieve a perfect auditory effect of CD-like sound quality
• Full-scale digital processing with large-scale field-programmable gate array (FPGA) technology
• Direct digital frequency synthesis (DDS) technology at speeds up to 5G to peak transmitter specifications
• High reliability microprocessor (ARM) technology as the primary controller
• Support for multiple audio source inputs (transmitters can be automatically selected by priority):
AES/EBU digital audio signal input (highest priority)
Analog stereo analog audio signal input (2nd priority)
MPX stereo composite signal input (3rd priority)
• Supports one RDS or SCA subcarrier input
• Upgradeable to FM synchronous broadcast transmitter
• Electronically controlled AGC controls output power zero drift
• Perfect over-current, over-voltage, over-temperature, over-power, standing wave ratio alarm and protection
• One-touch shuttle quick keyboard input
• Real-time display of operating parameters using OLED
• With TCP/IP, RS232 communication interface
• 19-inch standard chassis, height 2U

The Transmitter Block Diagram:

3. Technical specifications
Electrical Specifications:
1. Frequency Range 87MHz~108MHz
(other frequencies can be customized), stepping 10kHz
2. Carrier frequency tolerance ±200Hz
3. Output power 0~1000W continuously adjustable
4. Output power tolerance ±1dB
5. Output impedance 50Ω
6. RF output connector 7/16" or 7/8"
7. Residual wave radiation < -70dB
8. Parasitic amplitude modulation noise < -50dB
9. Pilot frequency deviation ±0.1Hz
10. 38KHz residual component in the S signal < -50dB
11. 100% modulation frequency offset ±75KHz
(maximum modulation frequency offset 112.5KHz)
12. Audio pre-emphasis 0μs/25μs/ 50μs/75μs optional
13. Signal-to-noise ratio ≥92dB (1kHz, 100% modulation)
14. Stereo separation ≥73dB (L → R, R → L)
15. Distortion ≤0.01% (30Hz ~ 15000Hz, 100% modulation)
16. Frequency response ±0.01dB (no emphasis, no de-emphasis);
±0.05dB (emphasis, de-emphasis)
17. Left and right channel level difference ≤0.01dB (100% modulation)
18. Analog audio input -12dBm ~ +8dBm
19. Analog audio input impedance 600Ω balance
20. AES input impedance 110Ω balance
21. AES input level 0.2~10Vpp
22. AES sampling rate 30kHz ~ 96kHz
23. RDS input impedance 10kΩ unbalance
24. RDS input level 0dBm
25. MPX input impedance 10kΩ unbalanced
26. MPX input level 1.0Vpp
27. Input audio Level Gain -15dB~+15dB Step 0.1dB
28. Heat dissipation method Forced convection
29. Power supply voltage 100VAC~265VAC/ 47Hz~63Hz

Physical Specifications:
30. Chassis standard 19" inch
31. Chassis size 2U (width 484mm × height 88mm × depth 500mm)
32. Total weight 16Kg (including packaging)
33. Operating environment temperature -10 ° C ~ +45 ° C
34. Relative humidity <95%
35. Altitude <4500m

Company Photos

Customs all over the world

Mike Cai
International Sales Director
ZHC(CHINA) Digital Equipment Co., LTD
Add: Building 5th, No.23, Jugong Rd. Binjiang District, Hangzhou, China
Tel: +86 571 8238 1886
Mobile: +86 135 8821 5572