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Development Kit
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When powering from the USB Dev connector, it is recommended to use the USB cable
provided with the DevKit. Low-quality USB cables often suffer from excessive voltage
drop, preventing correct operation.
It is safe to provide power to both connectors in parallel. The DevKit will use the source
with the highest voltage.
Make sure that a jumper is placed on header J200, as shown below. Otherwise the DevKit
will be powered, but not the mosaic module.
To measure the power consumption of the mosaic module (excluding the contribution
from the DevKit and the antenna, but including a small contribution from the interface
board, remove the jumper on J200 and connect the two pins to the probes of a multimeter
in current-sensing mode. Measure the current flowing between the two pins and multiply
it by 3.3V to obtain the power consumption. It is recommended to set the multimeter in
high ampere setting to keep the voltage drop as low as possible.
7.3
Antenna Connectors
There is no antenna connector on the DevKit. The antenna(s) must be connected directly
to the u.FL or MMCX antenna connector on the mosaic interface board.
The DC voltage (5V or 3.3V) at the antenna connectors is determined by the position of
the jumper on header J204, as shown below.
