Image Processing Reference
In-Depth Information
controlled RF environment using programmable splitters, multiplexers, and attenuators would also
be possible. his is a common technique in the test of RF systems requiring much care to the detail
and high investments as the proper shielding of all signals is not trivial. So far the complexity of the
implementation has only allowed to use simple triggers based on voltage levels, slopes, and external
clock inputs. Nevertheless, any available stimulation to represent deployment conditions increases
test coverage, rendering the design more reliable.
11.4.8 Test and Instrumentation Architecture for
Physical Characterization
The following section describes our current implementation of the test and instrumentation archi-
tecture. The main component is the CruiseControl server, running a number of software projects:
TinyOS applications or the PermaSense example discussed in Section .. Our testing architec-
ture is composed of a DSN testbed using a number of different target devices [] and laboratory
instrumentation using an Agilent Multifunction Switch Unit allowing to address multiple sensor
node targets for hardware instrumentation, multimeters, precision counter, and a programmable
power source/power analyzer (see Figure .). All instruments are accessible over TCP/IP and are
Power analyzer
and supply
Signal or clock
generator
Channel 1 Channel 2
Switch Unit
MicaZ
Tmote
TinyNode
DSN backchannel
DSN database
Testbed
FIGURE .
Logical and physical domain of the test architecture control apparatus used.
 
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