RHOTHETA Elektronik
RT-1000 MC
Multichannel (VDF) System for ATC and VTS
The RT-1000 Multichannel system is a direction finder (DF), which is designed for air traffic control (ATC) and for vessel traffic service (VTS) applications. The system is based on a very successful standard RT-1000 A and RT-1000 C Doppler direction finder, whose main components are applied in the multichannel system. In applications, where more than 2 simultaneously bearing channels are required, the RT-1000 Multichannel is the solution with best price performance relation. The flexible design enables the system adaptation to almost all applications. It is realised by using a couple of different standard components, which may be combined and configured individually. The system can cover up to 24 simultaneous DF-Channels. The software “DF-Commander” may display the bearing information and control the system. Via various user interfaces, the DF can be integrated in other systems.
| DF method | Doppler (3 kHz rotation frequency) |
|---|---|
| Antenna type | Compact Doppler Antenna, 4 Dipole antennas |
| Number of DF channels | Simultaneous operation, Up to 24 |
| Frequency range1 | Air band VHF: 118.000 – 136.975 MHz Marine band VHF: 156.000 – 174.000 MHz2 |
| Channel spacing | Air band VHF: 25 kHz Marine band VHF: 25 kHz Air band VHF: 8.33 kHz and 25 kHz |
| Operating channels | Air band VHF: 760 (25 kHz); 2278 (8.33 kHz) Marine band VHF: Channel 01 – 88 (incl. duplex channels) |
| Internal system resolution | 0.5° |
| Bearing sensitivity | Air band VHF ± 2° bearing fluctuation 3 μV/m typical Marine band VHF ± 2° bearing fluctuation 3 μV/m typical3 |
| Bearing accuracy4 | 118.000 – 136.975 MHz: ± 2° at 20 μV/m / 2° RMS 156.000 – 174.000 MHz: 2° RMS Option: Improved bearing accuracy: 1° RMS |
| Polarization | vertical |
| Polarization error | Field vector rotation up to 45°: ±1° |
| Cone of silence | Bearing error ≤ 5°: 45° |
| Bearable modulation types | A3E, F3E, A2X (ELT Modulation) |
| Storage temperature range | Antenna unit RTA-1300 A: - 40 °C to + 80 °C Bearing channel / Antenna control / RF Splitter: - 40 °C to + 60 °C |
| Operating temperature range | Antenna unit RTA-1300 A: - 40 °C to + 80 °C Bearing channel / Antenna control: - 40 °C to + 60 °C RF Splitter: - 20 °C to + 60 °C |
| Ingress protection | Antenna unit RTA-1300 A: IP65 |
| Max. wind speed | 270 km/h |
| Wind load | Antenna unit RTA-1300 A: 150 km/h: 135 N with constant wind speed: 180 km/h: 195 N |
RT-1000 MC
Accessories
Antenna Mast
The antenna mast is a girder mast which has been developed especially for the Doppler antenna system RTA 1300; it enables the turning and tilting of the antenna for Assembly and maintenance purposes. The mast will be delivered in disassembled condition. It has to be mounted and grounded after the assembly on a suitable base. The scope of delivery also includes a waterproof Installation box, in which the receiver unit and remote data Transmission can be located. All parts of the mast and the bolted connections are hot-dip galvanized or respectively made out of stainless steel.
PTT Modul
The PTT Module is an optional hardware that provides the “Push to Talk” function for RT-1000 Multichannel systems. PTT-function (Push to Talk) is used for suppressing the bearing indication, when a RF signal is transmitted from the ground transmitter station, in order to avoid an unwanted self-bearing. This function is also called the “Ground Transmitter Suppression” (GTS). The PTT Module is used in combination with the “DF-Commander” Software, which allows the remote control of bearing systems.
AIS Filter
The AIS Suppression Notch is a cavity filter, which sufficiently suppresses AIS signals at 161,965 MHz to 162,035 MHz by a notch filter function with a very low insertion loss in its pass band. The usage of the AIS suppression filter allows the installation of the direction finder antenna close to AIS transmitter stations and also allows the interference-free operation of the DF. It is recommended to install the AIS suppression filter if the distance between AIS transmitter with an EIRP of 10W and the Direction Finder is less than 200m.
Antenna Mastflange
The antenna mast flange allows the installation of the RT-1000 antenna on any construction. CAD drawings for integration are available on request.
Antenna Model
The antenna model simulates the radio direction antenna. If the antenna model is connected to a signal generator, it delivers a signal like a DF antenna under perfect conditions. It simulates the signal angle 0 °; 90 °; 180 ° or 270 ° at its RF output; the antenna model is a very useful device for the maintenance of the DF system.
UPS
As an option you can ensure a contious operation of the DF-System during failures in powersupply by ordering our 19´´ USP solution. The USP provides SNMP and HTML, ModBus/JBus relay outputs. The batteries are Hot swappable to provide a continous power supply even during maintenance.
Audio modules
The RT-1000 Multichannel is already prepared to be connected, for streaming the audio signals to the Ethernet LAN (voice over IP). For this, the RT-1000 Multichannel system requires an optional audio rack, including an industrial audio streaming devices, a live IP audio encoder (BARIX Instreamer). To use the audio option in the DF Commander software a special RHOTHETA firmware is necessary.
DF Commander MK2 Software
The DF Commander MK2 software enables remote control and monitoring of radio direction finding systems. Besides displaying the direction finding results on different electronic charts, the software is able to calculate cross bearings on different frequencies. Soundings, cross bearing results and status information of radio direction finding systems are made available via an integrated server. Radio direction finding systems can also be set and controlled via the same server. Thus the software is to be understood as a DF service.
Obstacle Light
The Obstacle Light is an optional safety accessory for the RT-1000 antenna mast. There exist two orderable variations: Single Obstacle Light and Double Obstacle Light. Both variations are intended for mounting on the top of the RT-1000 antenna mast.
Single Obstacle Light is a single-light-construction, which contains a light bulb in its housing and a corresponding mounting frame.
The Double Obstacle Light is a construction with two lights, which have an identical structure as the Single Obstacle Light. While the first lamp is in operation (operation lamp), the second lamp is in standby (standby lamp). In case of the failure of the operation lamp, the standby lamp will be automatically switched on. Furthermore the construction includes the IP 64 connection box and the corresponding mounting frame.
DF-Emulator Software
The "DF Emulator" is a software that emulates a bearing system on a Windows PC by playing a pre-recorded log file. In the simplest case, the DF emulator uses the serial COM port of the PC to transfer the data via RS232 to another PC or system that displays the bearing data. This software is designed for projects like bearing data integration in radar displays or other map- and control displays and is intended to facilitate the work of integrators.
SNMP Modul
SNMP Module is an optional hardware that provides the remote error monitoring of RHOTHETA RT-1000 direction finder systems over the Simple Network Management Protocol.
RT-1000 MC
References
RT-1000 MC
