Audited Supplier
MM37D is a Serial Data Transmission Radio with excellent RF performance and very low delay, it supports most wide frequency ranges from 136MHz ~ 174M, 220MHz ~ 240MHz to 410MHz ~ 470MHz and configure baud rate range and air data rate range from 1200bps to 115200bps.
The radio supports Line-Of-Sight (LOS) and Non-Line-Of-Sight (NLOS) wireless data transmission up to 12 kilometers.
The radio has RS232 and RS458 serial port in a one DB9 connector and supports to customize TTL serial port.
| RF Parameters | |
| Frequency Range | VHF1: 136 ~ 174MHz VHF2: 220 ~ 240MHz UHF1: 410 ~ 470MHz |
| Frequency Stability | ±2.5ppm |
| Channel Bandwidth | 10kHz @ 1200bps 25kHz @ 9600bps 200kHz @ 115200bps |
| Modulation | GFSK / 4GFSK |
| Transmitting Power | 37dBm |
| Receiving Sensitivity | -123dBm @ 1200bps -120dBm @ 9600bps -106dBm @ 115200bps |
| Data Transmission Parameters | |
| Serial Port Baud Rate | 1200 ~ 115200bps |
| Over-the-Air Data Rate | 1200 ~ 115200bps |
| Data Format | 8N1 / 8E1 / 8O1 |
| Latency | ≤ 3ms |
| General Parameters | |
| Power Supply | DC 12V±10%, Max. Current ≥ 3A |
| Transmitting Current | ≤ 2A |
| Receiving Current | ≤ 80mA |
| RF Interface | N-Type * 1 |
| Data Interface | DB9 Serial Port (RS-232 * 1 + RS-485 * 1, Customized for TTL) |
| Operation Temperature | -40°C ~ +80°C |
| Working Humidity | 10% ~ 90% Relative Humidity, No Condensation |
| Dimension | 105 * 62.4 * 25mm (Without Cable & Antenna) |
| Weight | ≤ 300g (Without Cable & Antenna) |
| Type | Pin | Definition | Remark |
| Power Connector | 1 | GND | Power Ground |
| 2 | VCC | Power Supply, DC 12V±10% | |
| DB9 Male Connector | 1 | NC | |
| 2 | RS232-RXD | RS232 Data Receive | |
| 3 | RS232-TXD | RS232 Data Transmit | |
| 4 | NC | ||
| 5 | GND | Signal Ground | |
| 6 | RS485-A | RS485 Data A | |
| 7 | RS485-B | RS485 Data B | |
| 8 | SET_EN | Set Enable | |
| 9 | SQ | Receiving Signal Indicator |
1. Sensor Data Transmission, e.g. Temperature, Humidity, Water Level, Chemical Gas Concentration
2. Telemetry Data Link, e.g. Vessel Monitoring, Pipeline Monitoring, Heat Network Monitoring, Water Level Monitoring, Environmental Protection Monitoring
3. Industrial Remote Control, e.g. Industrial Automation Process Control, Robot Control, Unmanned Vehicle Control
Q1. Could I get a sample before bulk order?
Yes, we offer the sample for all models with charges.
Q2. Do you accept OEM / ODM order?
Yes, we can customize the brand logo, colors, frequencies and etc....
Q3. Delivery & Shipment Date:
It is expected 25-30 working days after the fund/deposit received.
Q4. How can i get the price?
We usually response within 24 hours after we get your inquiry(Except weekend and holidays). If any urgent situation, please contact us by WhatsApp or E-mail.
