Texas Instruments CC1110-CC1111DK, Руководство пользователя

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CC1110/CC2510
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7.3 RF testing
RF testing is best performed by using SmartRF
®
Studio together with the Development Kit.
Connect the SmartRF04DK to a PC using the USB interface. Start SmartRF
®
Studio and
select the SmartRF
®
04 tab. Select the correct Development Kit (several Development Kits
can be connected to a PC at once), it should be listed as “CC2510 – new device” or “CC1110
– new device”, and click the Start button. In the main SmartRF
®
Studio window settings can
be changed, tests performed and registers adjusted. RF measurement equipment may be
connected to the SMA connector on the EM.
Please see the SmartRF
®
Studio documentation for more information about the operation of
SmartRF
®
Studio.
7.3.1 Output power testing
EB+EM Spectrum analyser RF carrier
Figure 9: Output power measurement set up
Plug an EM into the SmartRF04DK, and connect the Development Kit to a PC using USB.
Start SmartRF
®
Studio. Connect the antenna port of the EM board to a spectrum analyser
using a 50-ohm RF coaxial cable. Use the simple TX function in SmartRF
®
Studio to set up
the RF chip to emit a carrier at the desired frequency. An accurate measure of the output
power can now be made. It is recommended to use a resolution bandwidth (RBW) of 3 MHz
to ensure that all the RF energy is included in the measurement. Using good-quality RF
cabling, the loss in the cabling should be negligible. However make sure that the spectrum
analyser is calibrated. If possible, check it against a calibrated instrument such as an RF
signal generator. Uncalibrated spectrum analysers can display errors of several dBs.