The Vaisala Sigmet Radar and Antenna Control Processor RCP8™
Connecting a weather radar to the outside world
The purpose of a controller is to provide a simple interface between high-level user applications to the various electrical signals that are required to control and monitor a radar and antenna system. The RCP8™, our new PCI/Linux based controller, provides the flexibility to connect to radar systems from a variety of manufacturers. With comprehensive BITE monitoring, wide range inputs and programmable control logics, the RCP8™ offers outstanding versatility in the field. We provide a fully documented API so that sophisticated users can develop their own application software. Specify the RCP8™ for weather radar upgrades or for new weather radar systems. Of course the RCP8™ is 100% compatible with the Vaisala Sigmet IRIS software for UNIX workstations.
Flexible algorithms for ground-based and stabilized moving platform applications
The RCP8™ implements digital position and velocity servos that are more flexible than traditional analog servos-there are no pots to tweak to tune the servos. Because of the digital approach, the servo feedback can be easily adjusted to stabilize virtually any weather radar antenna system. The RCP8™ is so flexible that it is the favorite controller for shipboard weather radar applications since it can connect to an inertial navigation unit and compensate for ship motion to 0.1 degree.
Comprehensive over voltage protection for I/O lines
The Vaisala Sigmet I/O-62 PCI card serves as the gateway for signals in and out of the RCP8™. Each I/O line is configured with a fast switching diode to protect it against transient high-voltage spikes from lightning or other sources. This is important since radar systems are often sited in locations that are prone to lightning strikes.
Fail-safe protection for your investment
A radar antenna is a costly item. To protect this investment, the RCP8™ provides the most comprehensive fail-safe features in the industry. For example, a watchdog program constantly checks for consistency between the tachometer vs position angles, for velocity over-speed, unresponsive antenna and out of tolerance elevation angles. Aside from these built-in safety checks, the RCP8's™ programmable control logics allow users to create their own custom monitoring/response actions (e.g., alarm bells, warning lights, transmitter shutdown, etc.)
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RCP8™ I/O Characteristics | |
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Expandable I/O |
SIGMET I/O-62 PCI card (one standard) with RCP8™ rackmount panel |
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AZ and EL Angle Inputs |
TTL 16-bit binary of BCD for AZ and EL or Synchro/Resolver (various frequencies supported) |
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AZ and EL Angle Outputs |
Parallel TTL Binary angle up to 16 bits, or serial RS232 Asynch |
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Tach Inputs |
Analog up to +80 V |
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Antenna Drive Output |
+ 10 V to servo amplifiers for AZ and EL |
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Status Bit Input Range |
Switch closure or wide range +27 V triggering at +2.5V. 330K input impedance. +5V pull-up/down configurable by software |
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Control Bit Output Range |
RS422 and TTL. In addition 6 DIP relays are provided for switch closure output |
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A/D Inputs |
20 A/D inputs nominal + 6V, 12 bits @ 100 Hz |
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Host Interface |
10/100/1000T Ethernet or RS232C asynch serial selectable to 39 Kbps |
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Antenna Control/Monitoring Features | |
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Servo Types |
Digital position and velocity servos for both AZ and EL (independent) |
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Tachometer |
Analog TACH or "Virtual Tach" from differentiated angle input |
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Velocity Servo Accuracy |
0.5% at 3 RPM typical |
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Position Accuracy |
0.1 degrees typical |
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Fail Safe Checks |
Soft limiting, out-of-bound elevation request limiting, out of bound elevation, limit switch diode clamping, limit switch shutdown, out of bound antenna speed, unresponsive antenna, tach and angle changes inconsistent, "dead" host computer |
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Display |
Front panel 2-line user configurable display to show AZ and EL positions and velocities as well as status parameters and faults. Optional keyboard, mouse and monitor |
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Radar Conrol/Monitoring Features | |
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Dedicated Control Outputs |
Servo Power, Radiate, T/R Power, Pulse Width (4), Reset Signal |
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Dedicated Status Inputs |
Servo Power, Radiate, Standby, Wave Guide Pressure, Interlock, Cooling Airflow, Pulse Width (4), Antenna Local Mode |
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Arbitrary BITE Monitoring and Control Features | |
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BITE Status/Control Outputs |
Up to 80 lines configurable in groups of 8 to be either input or output, TTL/CMOS |
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Moving Platform Option | |
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Motion Reference |
Honeywell or Seatec INU with GPS update and serial output |
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Physical and Environmental | |
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Packaging |
2U or 4U EIA 19" rackmount chassis. 3U rackmount connection panel |
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Input Power |
85-264 VAC, 47-63 Hz |
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Power Consumption |
70 Watts |
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Environmental |
0°C to 50°C operating, 0 to 95% (non condensing) R.H. |
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Reliability |
>50,000 Hours MTBF |
- RCP8 datasheet(99.29 KB)
