RVT Radio Voice Transmitter
The RVT uses "text-to-speech" to convert weather data into computer-synthesized audio which is then broadcast over standard voice channels using any standard DTMF-capable radio. It is a popular option for Quick Deploy Portable RAWS, since users can call the station for instant on-the-spot voice reports of current conditions. In addition, it can be set to trigger the broadcast of current conditions when defined thresholds are reached, providing valuable alarms to the fire crew and eliminating the need to be near the QD. The RVT is also commonly installed on fixed RAWS as well.
The RVT is a fully programmable voice unit and can be customized by the user, but is usually shipped pre-configured by FTS.
The RVT is a fully programmable voice unit and can be customized by the user, but is usually shipped pre-configured by FTS.
- Allows multiple access codes for different sets of weather information—get only the data you need, based on the inquiry code sent.
- Minimizes air time, saves radio power and improves safety by conserving air time for others.
- Instant voice alerts of exceeded weather parameter thresholds provide real-time decision-making, maximizing firefighter and public safety.
- Supplied with a library of pre-defined phrases that can be assembled into reports as needed by the user.
- Assign your own DTMF tones to each voice report.
- Reports and DTMF tones can be pre-configured by FTS as per customer requirements.
- Weather data can be requested by anyone with a DTMF capable radio.
- No reprogramming in event of power failures.
- Radio handset mounts externally on the transmitter inside the enclosure providing easy access and quick installation.
The computer digitized voice that is played through the radio handset is exceptionally clear. Here are some samples:
Air temperature: 32.3°C.
Humidity: 60%.
Wind speed: 22kn
Wind direction: 120°
Fuel moisture: 12.3%
Fuel temperature: 20 °C
Main battery: 8.3V
Peak wind speed: 90kn
Peak wind direction: 80°
Solar radiation: 12W/m2
Rain: 1.3cm
Rain limit: over 3.2cm
Station Alpha-1:
Air temperature: 32.3°C
Station Alpha-1:
Humidity 40%
Voice Reports:
Air temperature: 32.3°C.
Humidity: 60%.
Wind speed: 22kn
Wind direction: 120°
Fuel moisture: 12.3%
Fuel temperature: 20 °C
Main battery: 8.3V
Peak wind speed: 90kn
Peak wind direction: 80°
Solar radiation: 12W/m2
Rain: 1.3cm
Rain limit: over 3.2cm
Alerts:
Station Alpha-1:
Air temperature: 32.3°C
Station Alpha-1:
Humidity 40%
The transmitter is housed in an O-ring sealed, cast aluminum case for maximum protection of the electronics and easy maintenance.
The RVT can be supplied pre-programmed and will not lose its programming or DTMF assignments when moved between deployments or in the event of a power failure.
Diagnostics & Operating Status
The front panel LED status lights give clear confirmation of operating status with indicators for Power, Listening and Transmitting.
Radio Compatibility
The RVT can be supplied with a built-in radio featuring carrier detect to eliminate transmission collisions with other users of the voice radio channel. The RVT is also compatible with most hand held radios which can be housed inside the RVT, or can be connected to a larger, externally mounted radio.
Voice Reports & Phrases
The RVT Radio Voice Transmitter in combination with the Axiom datalogger provides verbal reports of weather conditions by keying DTMF tones on a handheld radio. The RVT comes with a library of predefined phrases which are made into verbal reports and assigned DTMF tones.
Creating Reports
Creating reports using the existing vocabulary list is done using the standard Hyperterminal program provided with Microsoft Windows operating systems. Alert messages are developed using the same program. FTS supplies a Hyperterminal configuration file to support communication with the RVT.
The vocabulary has been designed specifically for weather applications. Adding to the vocabulary can be done by qualified service shops or the FTS factory.
Alert Messages
The RVT Transmitter is able to send out voice Alerts when weather conditions exceed predetermined values. Alerts can be generated for any conditions measured by the datalogger such as changes in temperature, humidity or wind.
Allows different DTMF tones to announce different sets of current weather conditions.
Automatically broadcasts alerts when weather conditions move outside defined ranges.
No airtime costs.
Fully programmable.
Limited range (same range as VHF radio system being used).
