卫星发射器 / TX325
TX325 Satellite Transmitter for GOES V2
New Standard for Reliability in GOES Transmitters
Smaller form factor, easy to use, and rugged
气象 应用支持 水资源 应用支持 能源 应用支持 湍流通量 应用支持 基础结构/工业设施 应用支持 土壤 应用支持

概览

The TX325 is a GOES satellite data transmitter and is the successor to the TX321. In the Western Hemisphere, it is compatible for use with NOAA’s GOES DCS with a coverage range including Canada, the United States of America, and Mexico—as well as most countries in Central America and many South American countries.

The TX325 is the telemetry backbone for many data collection platforms (DCP) that utilize GOES satellites. The satellite transmitter can be integrated with a number of Campbell Scientific data loggers and is an available communications option for many of our systems, serving a wide range of applications.

优势与特点

  • NESDIS HDR V2 certified
  • Compatible with GOES DCS system
  • Easy integration with Campbell Scientific data loggers
  • Field tested and proven track record of reliability

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技术说明

The TX325 transmitter can transmit either self-timed or random GOES messages to the GOES West and GOES East satellites. In a typical configuration, the TX325 is connected to a data logger via an RS-232 serial connection. The data logger makes measurements, then formats those values to create a data packet which is then transferred to the TX325. The TX325 then buffers the message until its transmission window (or random transmission time), when it will then transmit the data at either 300 or 1200 bps.

Extremely accurate timing is obtained from the integrated GPS receiver (±100 μs), and the internal clock is capable of maintaining accurate time for a minimum of 20 days. If the TX325 finds itself without an accurate time, it suspends data transmissions until an accurate time is obtained.

产品规格

Transmissions Supported
  • Timed (Scheduled)
  • Random
Data Format
  • ASCII (SHEF)
  • Pseudo Binary
Transmit RF Out Connector Type N jack
Radio Module OmniSat-3
Operating Temperature Range -40° to +55°C
Storage Temperature Range -55° to +75°C
Certifications NOAA/NESDIS GOES High Data Rate Certification Standard V2 Certification #12142012
Case Dimensions 15.88 x 12.7 x 4.57 cm (6.25 x 5 x 1.8 in.) not including connectors
Maximum Dimensions 15.88 x 14.99 x 4.57 cm (6.25 x 5.9 x 1.8 in.) including connectors
Weight 0.77 kg (1.7 lb)

Supply Power

Supply Voltage Range 10.5 to 16 Vdc
Typical Current Drain
  • < 2.5 A when transmitting (typical 1.8 A at 12 Vdc)
  • < 5 mA standby (typical 2.8 mA at 12 Vdc)
  • < 50 mA during GPS acquisition (typical 25 mA at 12 Vdc)
Connector 2-pin screw terminal, 0.2 in. pitch

Satellite GOES

Baud Rates 300 and 1200 bps
Transmit Power (300 baud)
  • 31 dBm maximum
  • Maximum EIRP is 41 dBm (based on 11 dbm gain antenna and 1 dbm line loss)
  • Typical EIRP is 37 to 41 dBm.
Transmit Power (1200 baud)
  • 37 dBm maximum
  • Maximum EIRP is 47 dBm (based on a 11 dbm gain antenna with 1 dbm line loss)
  • Typical EIRP is 43 to 47 dBm.
Frequency Range 401.701 to 402.09925 MHz
Initial Frequency Stability ±20 Hz disciplined to GPS (GPS fix occurs after power up and once per day thereafter.)
Channel Bandwidth
  • 300 Baud 1.5 KHz
  • 1200 Baud 2250 Hz

GPS Receiver

Receiver Type 3.3 V active
Connector Type SMA jack

Timekeeping

Initial Accuracy ±100 μs (synchronized to GPS)
Drift ±40 ms/day (without GPS)
GPS Schedule 1 fix at power up (updated at roughly an 11-hour rate)
Transmission Continuation without GPS Fix 6 days

Interface Connectors

RS-232 DB9, DB9 F, DCE, 3-wire RS-232
Satellite RF Transmit Out Type N jack
GPS SMA jack
Power 2-pin screw terminal, 0.2 in. pitch

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
CR1000 Requires OS version 32.04 or greater.
CR1000X Requires OS version 4 or greater.
CR300 Requires OS version 10 or greater.
CR3000 Requires OS version 32.04 or greater.
CR310 Requires OS version 10 or greater.
CR6 Requires OS version 10 or greater.
CR800 Requires OS version 32.04 or greater.
CR850 Requires OS version 32.04 or greater.

下载

TX325 Program Example for CR3000, CR1000, or CR800 Data Logger v.1 (3 KB) 03-09-2019

CR3000, CR1000, or CR800-series data logger program for the TX325 that sets up self-timed and random transmissions and reads diagnostic information. Another TX325 program is available for the GRANITE-series, CR6, CR1000X, or CR300-series data loggers because they are programmed differently.

TX325 Program Example for GRANITE, CR6, CR1000X, or CR300 Data Loggers v.1 (3 KB) 03-09-2019

GRANITE-series, CR6, CR1000X, or CR300-series data logger program for the TX325 that sets up self-timed and random transmissions and reads diagnostic information. Another TX325 program is available for the CR3000, CR1000, or CR800-series data loggers because they are programmed differently.