NLOS RS232 Digital Data Transmitter UHF Radio Modem Point-to-multi-point
NLOS RS232 Digital Data Transmitter UHF Radio Modem Point-to-multi-point
Feature:
1. Flexible configuration as point-to-point or point-to-multi-point;
2. Can be set 256 Spots, the channel spacing is 25KHZ (standard);
3. Long range transmission: 30km in city;
4. Integration of transceiver, both digital and analog signals can be send and switch quickly;
5. Either co-frequency or unco-frequency in air transmission;
6. Use standard TTL, RS232 (or 485) level, convenient to connect to the control keyboard or personal computer directly;
7. SMT design, stainless steel outshell, miniature size and easy to install, can stick heat sinks;
8. Testing methods is in accordance with Mobile Communications “90” standard.
| Transmit System Indicators | |
| Frequency | 150MHz, 230MHz, 350MHz, 450MHz |
| RF Power | 30W |
| Voltage | 12-14V |
| Current | ≤7.6A |
| Frequency stability | ± 2.5ppm |
| Channel spacing | 25KHz |
| Antenna Impedance | 50Ω |
| Ambient temperature | -30 ~ +60 |
| Frequency settings | data-chosen-switches or be written on the computer |
| Data transfer rate | 1200bps/2400bps/4800bps/9600bps |
| Modulation | FSK/MSK |
| Modulation Distortion | ≤ 3% |
| Modulation Sensitivity | 100mV (3KHz offset) |
| Adjacent channel power ratio | ≥ 65dB |
| Spurious frequency components | ≤-65Db |
| NLOS distance | 30km |
| Size | 250*190*70mm |
| Receive System Indicators | |
| Usable sensitivity | ≤-120dBm (12dB SINAD) |
| Residual level output | ≤-45dB |
| Receiver Bandwidth Modulation | ≥ 5KHz |
| Adjacent channel selectivity | ≥ 65dB |
| Intermodulation Immunity | ≥ 60dB |
| Spurious Response Immunity | ≥ 65dB |
| Demodulated output | ≥ 0.2V audio voltage |
rompt: Please make sure that the current is switched off before you install the antennas. There must be more than 10 meters between the two to avoid signals jam because of two strong signals.
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