Paper |
Title |
Other Keywords |
Page |
PT04 |
Advantages Of Implementing Digital Receivers In Field Programmable Gate Arrays (FPGA)
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controls, diagnostics, industrial-accelerators, instrumentation |
175 |
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- S. Bremec, R. Uršič, U. Mavrič
I-Tech, Instrumentation Technologies, Solkan, Slovenia
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Todays state-of-the-art FPGA technology allows designers to satisfy
almost any demand for high-speed data processing needed in DSP
applications and fast data transfers. Dedicated FPGA resources are used
in DSP applications to perform down conversion, filtering and data
formatting. New trends in system architecture favor serial data transfer
rather than parallel by using FPGAs internal resources, BRAMs, high
speed serial IOs and hard core processors.
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PT05 |
Experience With Sampling Of 500 MHz Rf Signal For Digital Receiver Applications
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controls, diagnostics, industrial-accelerators, instrumentation |
178 |
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- U. Mavrič, S. Bremec, R. Uršič
I-Tech, Instrumentation Technologies, Solkan, Slovenia
|
This article will present test results of a prototype system that was
built to evaluate feasibility of a direct sampling of a 500 MHz RF signal
for use in digital receiver applications. The system consists of a
variable gain RF front end, a fast analog to digital converter (ADC) and
a field programmable gate array (FPGA) providing glue-logic between the
ADC and a PC computer.
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PT06 |
Dynamic X-Y Crosstalk / Aliasing Errors of Multiplexing BPMs
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instrumentation, diagnostics, pick-up, monitoring, controls, feedback |
181 |
|
- T. Straumann
SLAC, Stanford Linear Accelerator, Stanford, CA, USA
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Multiplexing Beam Position Monitors (BPM) are widely used for their
simplicity and inherent drift cancellation property. These systems
successively feed the signals of (typically four RF) pickups through one
single detector channel. The beam position is calculated from the
demultiplexed (base band) signal. However, as shown by this contribution,
transverse beam motion results in positional aliasing errors due to the
finite multiplexing frequency. Fast horizontal motion, for example, can
alias into an apparent, slow vertical position change. A thorough
analysis is presented and the impact of essential parameters such as the
multiplexing rate and the scanning pattern/sequence of classical 4-button
pickups is discussed.
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