Overview
The TX326 is a satellite transmitter that uses the Meteosat satellite system to provide one-way communications from a data collection platform (DCP) to a receiving station.
Meteosat is a system of geostationary meteorological satellites operated by EUMETSAT (European Organisation for the Exploitation of Meteorological Satellites). Geostationary satellites have orbits that coincide with the Earth's rotation, allowing each satellite to remain above a specific region. EUMETSAT is an intergovernmental organization created through an international convention of European countries.
Read MoreBenefits and Features
- EUROSAT SRDCP and HRDCP certified
- Compatible with Meteosat satellite data collection system
- Easy integration with Campbell Scientific data loggers
- Field tested and proven track record of reliability
- Embedded GPS receiver for stabilized internal time keeping and transmit frequency for long service intervals
- Low standby current consumption for battery-powered systems at remote DCP installation sites
- Quick assessment of radio health via monitoring of diagnostic data from the radio
For the TX325 and TX326, an active GPS antenna is required, and the maximum antenna RF gain the antenna can have is 25 dB. The radio (TX32X) will only supply 3.3 V to an active GPS antenna.
Technical Description
The TX326 transmitter uses the Meteosat satellite system to provide one-way communications from a data collection platform (DCP) to a receiving station. Supported transmission rates are 100 (SRDCP) and 1200 (HRDCP) bps. This transmitter is used with our CR300, CR310, CR1000X, and CR6 dataloggers, as well as with our GRANITE measurement and control data-acquisition systems.
Because clock accuracy is critically important for Meteosat satellite telemetry, the TX326 includes an embedded GPS receiver. The GPS receiver automatically corrects for clock and oscillator drift, allowing for longer intervals between service visits.
Detailed diagnostic information about the radio is also available for the field technician and various diagnostic uses. These diagnostic parameters include the following:
- Latitude and longitude using the built-in GPS
- Current battery voltage
- Current temperature
- Battery voltage before last transmission
- Temperature before last transmission
- Battery voltage during last transmission
- Altitude of last GPS position
- Time of last GPS position
- Number of GPS fix misses
- Time of last missed GPS fix
- GPS receiver health and status
- Failsafe tripped indication
- Duration of last transmission
- Forward power of last transmission
- Reflect power on last transmission
- VSWR (voltage standing wave ratio) last transmission results
- Current transmission state
Cable Options
On the Ordering Information page of the website, ensure you order the correct cable option to meet your needs.
- To connect the TX326 to the CR6 or CR1000X RS-232/CPI port. select the -R option.
- To connect the TX326 to the COM (C, U) ports of a data logger, select the -C option.
- To connect the TX326 to the 9-pin RS-232 port of a data logger, select the -S option.
Images
Specifications
| Transmissions Supported |
|
| Data Format |
|
| Transmit RF Out Connector | Type N jack |
| Radio Module | OmniSAT-3 |
| Operating Temperature Range | -40° to +60°C |
| Storage Temperature Range | -55° to +75°C |
| EUMETSAT DCP Radio Certification (2013-003) |
|
| Time-of-Day Clock | Accurate to 20 ms with GPS receiver. |
| 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 |
|
| Connector | 2-pin screw terminal, 0.2 in. pitch |
| Power Protection |
Up to 23.1 V (reverse polarity and overvoltage) Total system current is fused at 5 A with replaceable fuse |
Satellite Communication |
|
| Baud Rates | 100 (tolerance ±0.005 bps) and 1200 bps (tolerance ±0.06 bps) |
| Transmit Power (100 baud) |
|
| Transmit Power (1200 baud) |
|
| Frequency Range - Meteosat | 402.0355 MHz (channel #1) to 402.4345 MHz (channel #267) (267 channels with a 1.5 KHz channel bandwidth each.) |
| Frequency Range - International | 402.0025 MHz (channel #268) to 402.034 MHz (channel #289) (21 channels reassigned from international bandwidth 1.5 KHz.) |
| Initial Frequency Stability |
|
| Channel Bandwidth | 100/1200 Baud 1.5 KHz |
GPS Receiver |
|
| -NOTE- | The TX326 can source up to 19 mA at 2.7 V for an external GPS antenna. Campbell Scientific recommends a maximum antenna Low-Noise Amplifier (LNA) of 1.5 dB. |
| Maximum RF Input Gain | 25 dB |
| 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 M, DTE, 3-wire RS-232 |
Compatibility
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Dataloggers
| Product | Compatible | Note |
|---|---|---|
| CR1000 (retired) | ||
| CR1000X | Requires OS version 4 or greater. | |
| CR300 (retired) | Requires OS version 10 or greater. | |
| CR3000 | ||
| CR310 | Requires OS version 10 or greater. | |
| CR350 | Requires OS version 10 or greater. | |
| CR6 | Requires OS version 10 or greater. | |
| CR800 (retired) | ||
| CR850 (retired) |
Miscellaneous
| Product | Compatible | Note |
|---|---|---|
| GRANITE 10 | ||
| GRANITE 6 | ||
| GRANITE 9 |
Resources and Links
Product Brochures
Compliance
Downloads
TX326 and TX325 Program Example for GRANITE, CR6, CR1000X, or CR300 Data Loggers v.6 (5 KB) 18-10-2021
GRANITE-series, CR6, CR1000X, or CR300-series data logger program for the TX326 and TX325 that sets up self-timed and random transmissions and reads diagnostic information. Another program is available for the TX325 with the CR3000, CR1000, or CR800-series data loggers because they are programmed differently.
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