USER’S MANUAL__________________________________________________________________
22 __________________________________________________________________ M211322EN-D
lock the A/D conversion with the transmit pulse (not used for
magnetron systems); however, the internal clock of the IFDR is so
stable the unit can be used as the reference clock for the entire radar
system.
IF transmit waveforms are synthesized by the IFDR and can be output
over two BNC connectors. The IF transmit waveforms are
programmable in phase, frequency, and amplitude. In the simplest
case, it might supply the Coherent Local Oscillator (COHO), which is
mixed with the STALO to generate the transmit RF for Klystron or
TWT systems. More interesting applications include pulse
compression and frequency agility scanning.
The RVP901 IFDR can handle miscellaneous digital input and output,
such as triggers, polarization switch controls, pulse width control, and
more. Each of these I/O lines is a general purpose, uncommitted,
static-protected signal that is directly controlled by the FPGA. Their
specific functions is defined at the user-level in future software
releases.
The IFDR is connected to the RVP902 Signal Processor by a CAT5e
cable, which can be up to 25 m in length.
- RVP902 Signal Processor—A robust 1U rack-mounted PC chassis
with dual quad-core Intel Xeon motherboard, two hot-swappable hard
drives, DVD/RW, keyboard, mouse, and optional monitor for local
diagnostic work. Redundant fans and a remote Intelligent Platform
Management Interface (IPMI) are also included.
- Expansion Panels—A means for the signal processor to interface
with other sub-systems of a radar. The RVP901 is designed with a
high number of generic I/O capability to interface with these
expansion panels. Currently, an expansion panel is available for the
TDWR system. In the future, the RCP8 panel has the option to
connect to the RVP901.
Compared to the previous generations architecture, this approach of
consolidating all functionality into one printed circuit board eliminates
four components. This increases reliability by reducing the number of
hardware devices that could fail. It also decreases the life-time costs of
operating a radar by lowering the cost of spares and maintenance.
Typically, Vaisala supplies turn-key systems, although some OEM
customers who produce many systems can purchase just the RVP901
component and integrate it themselves. This allows OEM customers to put
their own custom “stamp” on the processor and even their own custom
software.
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