长距离通讯选项
概览
RF323 电台的频段为 450-470 MHz。坎贝尔的RF320系列窄波段 UHF/VHF电台收发器提供长距离的遥测通讯选项，用于远程的监测气象站。每套电台包括1个已经设置好的Ritron DTX-L 电台、1个固定托架和1个连接电台与电台modem的线缆。不同型号代表它们所支持的频段不同。
图像
技术说明
RF323 被坎贝尔编程，用于美国通讯委员会（FCC）指派的频段。在订购时必须指定频段，这样它可以被编程到电台中。
用户提供天线给每一个电台；联系坎贝尔咨询关于选择天线和线缆的更多信息。每一个电台还必须被连接到RF500M 或 RF310M电台modem。
产品规格
| Ritron Module | DTX-445 |
| FCC ID | AIERIT17-445 |
| Industry Canada ID | 1084A-RIT17445 |
| FCC Rule Parts | 90 |
| Industry Canada Rule Parts | RSS-119 |
| Frequency Range | 450 to 470 MHz |
| RF Channels | 8 independent Tx/Rx frequencies |
| Synthesizer Step | 6.25 kHz |
| Channel Spacing | 12.5 kHz |
| Frequency Stability | ±1.5 PPM (-30° to +60°C) |
| Input Voltage | 9 to 17 Vdc |
| Antenna Connector | BNC socket (female) |
| Dimensions | 14.5 x 7.6 x 3.5 cm (5.7 x 3 x 1.375 in.) |
| Weight | 0.2 kg (7.3 oz) |
Current Drain @ 12.5 Vdc |
|
| Receive Standby | 25 mA |
| Transmitter |
|
Receiver |
|
| Receiver Type | 12.5 kHz narrowband |
| Sensitivity | 0.25 μV (12 dB SINAD) |
| Adjacent Channel | -60 dB |
| Receiver Attack Time | < 10 ms (Tx to Rx) |
| Noise Squelch Sensitivity | PC adjustable (factory set for -121 dBm) |
Transmitter |
|
| RF Power Output | 2.0 W or 5.0 W (@ 12.5 Vdc) |
| Duty Cycle | 50% (< 13.5 V, 5 W output, 25°C) |
| Voice Emissions Designator | 10K0F3E |
| Data Emissions Designator | 9K8F1D, 11K0F2D, 11K0F3D |
| Transmitter Attack Time | < 10 ms |
兼容性
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
数据采集器
| Product | Compatible | Note |
|---|---|---|
| 21X (retired) | This data logger is only compatible if the RF500M radio modem is used. | |
| CR10 (retired) | This data logger is only compatible if the RF500M radio modem is used. | |
| CR1000X | This data logger is only compatible if the RF500M radio modem is used. | |
| CR10X (retired) | This data logger is only compatible if the RF500M radio modem is used. | |
| CR200X (retired) | The CR200X-series dataloggers are only compatible if the RF500M radio modem is used. | |
| CR206X (retired) | The CR200X-series dataloggers are only compatible if the RF500M radio modem is used. | |
| CR211X (retired) | The CR200X-series dataloggers are only compatible if the RF500M radio modem is used. | |
| CR216X (retired) | The CR200X-series dataloggers are only compatible if the RF500M radio modem is used. | |
| CR23X (retired) | This data logger is only compatible if the RF500M radio modem is used. | |
| CR295X (retired) | The CR200X-series dataloggers are only compatible if the RF500M radio modem is used. | |
| CR300 | This data logger is only compatible if the RF500M radio modem is used. | |
| CR3000 (retired) | This data logger is only compatible if the RF500M radio modem is used. | |
| CR310 | This data logger is only compatible if the RF500M radio modem is used. | |
| CR350 | This data logger is only compatible if the RF500M radio modem is used. | |
| CR500 (retired) | This data logger is only compatible if the RF500M radio modem is used. | |
| CR5000 (retired) | ||
| CR510 (retired) | This data logger is only compatible if the RF500M radio modem is used. | |
| CR6 | This data logger is only compatible if the RF500M radio modem is used. | |
| CR800 (retired) | This data logger is only compatible if the RF500M radio modem is used. | |
| CR850 (retired) | This data logger is only compatible if the RF500M radio modem is used. | |
| CR9000 (retired) |
常见问题解答
RF323: 2
-
It is possible to connect two antennas to a single radio via a properly specified (operating frequency and power handling capability) two-way, 50 ohm RF power divider. One example of this type of power divider is offered by Pasternack. Note that using a device like this will induce additional losses into the system (3 to 4 dB, typically).
-
No. The RF500M cannot be directly interfaced with a GPS receiver. However, most Campbell Scientific data loggers can be interfaced with the output from a GPS receiver and programmed to extract the positional information. This information can then be accessed via an RF500M/RF320 RF link.