Shenzhen dingshen Industrial Co., Ltd
| Payment Terms | T/T |
| Supply Ability | 1000PCS per month |
| Delivery Time | 3-7 days |
| Packaging Details | export standard packing |
| Frequency: | VHF/UHF ( 223-235MHz ) |
| Frequency Stability:: | ± 2.5ppm |
| Size: | 70*46*8mm |
| Power:: | 500mW |
| Mode:: | Half-duplex |
| Interface: | RS-232, TTL, RS-485 |
| Brand Name | Ding Shen |
| Model Number | DS-RM304 |
| Place of Origin | China |
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Product Specification
| Payment Terms | T/T | Supply Ability | 1000PCS per month |
| Delivery Time | 3-7 days | Packaging Details | export standard packing |
| Frequency: | VHF/UHF ( 223-235MHz ) | Frequency Stability:: | ± 2.5ppm |
| Size: | 70*46*8mm | Power:: | 500mW |
| Mode:: | Half-duplex | Interface: | RS-232, TTL, RS-485 |
| Brand Name | Ding Shen | Model Number | DS-RM304 |
| Place of Origin | China | ||
| High Light | Modem VHF UHF Transceiver Module ，FSK Wireless UHF Transceiver Module ，Long Range UHF Transceiver Module | ||
500mW FSK Wireless DATA Transceiver VHF / UHF Wireless Data Module
DS-RM304 is a module of DATA transmission integrated with voice communication. Specially designed for automatic industry with high reliability and stability. Provide voice transmission channel, can be connected to a microphone or loudspeaker directly, very easy to extend its functions and applications by the clients. And moreover, we are always ready for your OEM.
Features:
Use TCXO and digital PLL advanced technologies, high stability;
Integration of transceiver, both digital and analog signals can be send and switch quickly;
Steady outsell, good hidden and stronger anti-interference;
Industrial designees, work temperature: -40~+70°C;
Several kinds of interfaces for choice: RS-232, TTL, RS-485;
DATA Format: 8N1/8E1/8O1( Customized )
Antenna Impedance: 50Ω (SMA Customized)
Application:
Remote reading system of water, electric and gas supply;
Building Automation, security & protection, devices monitoring and access control
system;
Wireless calling system;
Spot management, station management;
RF transmitter Wireless electronic display screen and queuing machine;
Electronic bus station and intelligent traffic;
Alarm systems.
Specification:
Frequency: VHF/UHF ( 223-235MHz )
Power: 500mW
Frequency stability: ± 2.5ppm
Mode: half-duplex
Channel spacing: 25KHz
Voltage: DC 12V ( Customized )
Transmission distance: 2km
Receiver Indicator:
Usable sensitivity: ≤0.25μV (12dB SINAD)
Adjacent channel selectivity: ≥70dB
Spurious Response Immunity: ≥ 65dB
Adjacent channel power ratio: ≥70dB
Audio Output: 0.5W(8Ω, 10% Distortion)
Distortion: ≤3%
Current: ≤ 50mA
Transmitter indicator:
RF Output: 500mW
Adjacent channel power ratio: ≥70dB
Modulation Distortion: ≤3%
Modulation Sensitivity: 5mV
Current: ≤300mA
Size: 70*46*8mm
Interfaces definition:
| Name | Description | Level | Remark | |
| 1 | VCC | DC | 12 V
| DC 12V ( as good in range 7.5~15V), or customized |
| 2 | ||||
| 3 | GND | GND | --------- | ----------------- |
| 4 | ||||
| 5 | A(TXD) | RS-485 A or TXD of RS-232 | Either RS-485 or RS-232 | |
| 6 | B(RXD) | RS-485 B or RXD of RS-232 | ||
| 7 | PTT | Transmit control | TTL | Low level validity |
| 8 | MIC | Audio input | -------- | Recommend 1K-2K, -27dB sensitivity of microphone |
| 9 | SP | Audio output | 8Ω 0.5 | |
| 10 | SQ | Receiving indication | TTL | High-level |
6 Complete set of equipment:
1. One module of KP-RM304;
2. 10 pin flat connector;
3. A whip antennas ( about 10cm)
7 Antenna appearance structure:
Many appropriative antennas for low power RF modules are selected to meet different user’s antenna configuration. Please ask our Sales office for further information about the antenna’s dimension and performance. The main options of antennas are exterior flabelliform rubber antenna with helical SMA joint, small osculum antenna, small rod antenna and elbow antenna. If the user has special demands on antennas, we can design and produce individually.
Company Details
Business Type:
Manufacturer
Ecer Certification：
Active Member
Dingshen is a leading of High-tech global enterprise in developing and manufacturing. Company established in 1998 and located in Shenzhen China. Specializing in the provision of advance wireless microwave communication system to the broadcast, UAV, public surverillance and defense industries. By con... Dingshen is a leading of High-tech global enterprise in developing and manufacturing. Company established in 1998 and located in Shenzhen China. Specializing in the provision of advance wireless microwave communication system to the broadcast, UAV, public surverillance and defense industries. By con...
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