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Debugging Serial Buses in Embedded System Designs
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Embedded systems can contain many different types of devices including microprocessors, microcontrollers, DSPs, RAM, EPROMs, FPGAs, A/Ds, D/As, and I/O. These various devices have traditionally communicated with each other and
the outside world using wide parallel buses. Today, however, more and more of the building blocks used in embedded system design are replacing these wide parallel buses withserial buses for the following reasons:
- Less board space required due to fewer signals to route
- Lower cost
- Lower power requirements
- Fewer pins on packages
- Embedded clocks
- Differential signaling for better noise immunity
- Wide availability of components using standard serial interfaces
While serial buses provide a number of advantages, they also pose some significant challenges to an embedded system designer due simply to the fact that information is being transmitted in a serial fashion rather than parallel. This application note discusses common challenges for embedded system designers and how to overcome them using capabilities found in the MSO/DPO Series oscilloscopes. Click here to continue reading
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An Intro to Digital and Vector Modulation
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Many new schemes for conveying speech or data information on an RF carrier for land line or radio transmission have been developed using different forms of modulation other than the older analog schemes for speech. The modulation formats are still based on either amplitude (AM) or angle modulation (FM orĈM) or a combination of both. However the detail of how they are most easily generated and demodulated is very different.
Digital modulation can take many different forms. The basic method of modulation is the same as a conventional analog system but the method of inserting the modulation on the carrier is different. In an analog modulation system the signal is first filtered by an analog low pass or bandpass filter and then is applied directly to the modulator to produce either AM or angle modulation, or a combination of both. Click here to continue reading
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Aeroflex Introduces DMR (MOTOTRBO) AND NXDN Test Option to 3500A
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Purchase an Aeroflex 3500A for $18,500 and receive the following at no additional cost!
3500A OPT01 Oscilloscope FREE! (Reg. $1,250.00)
3500A OPT02 Spectrum Analyzer FREE! (Reg. $1,250.00)
3500A OPT08 Tracking Generator FREE! (Reg. $1,250.00)
PLUS...Select ONE of the following at no additional charge:
3500A OPT07 P25 Test Option FREE! (Reg. $3,750.00)
OR
3500A OPT33 NXDN Test Option FREE! (Reg. $2,500.00)
OR
3500A OPT32 DMR (MOTOTRBO) FREE! (Reg. $2,500.00)
This offer is only valid until March 31, 2011. Contact Us Today!
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2011 Scope Sales Event
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8 out of 10 engineers the world over trust Tektronix oscilloscopes for their test needs. Now is the time to save on Tektronix scopes, whether you need a scope with basic visualization or mixed signal capabilities. Save up to 40% on over 25 oscilloscopes models in the 2011 Scope Sales Event. Click here for details.
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