NINA-B4 series - System integration manual
UBX-19052230 - R06
Design-in
Page 27 of 45
C1-Public
2.7.2
OEM manufacturer production test
As production testing is already performed by u-blox, OEM manufacturers do not need to take any
further RF performance measurements or repeat any test of the software or interfaces during
production.
Consequently, OEMs are encouraged to focus testing of end-product applications towards:
•
Verification of the module assembly; check that:
o
Soldering and handling processes have not damaged the module components
o
All module pins are soldered on the device board
o
There are no short circuits between pins
•
Verification of the component assembly on the device; check that:
o
Communication with host controller can be established
o
The interfaces between the module and device are working
o
Overall RF performance test of the device including the antenna
Dedicated tests can be implemented to check the device. For example, the current consumption of
module when set in a specified state can detect a short circuit if compared with a “Golden Device”
result.
The standard operational module firmware and test software on the host can be used to perform
functional tests (tests that that check the interfaces and communication with the host controller)
and perform basic RF performance tests.
2.7.2.1
“Go/No go” tests for integrated devices
Go/No Go testing is used to test overall function of the device. In a good test setup, each component
and soldering joint is related to a basic functional test. If the test is successful, the assembly is
considered as functionally correct.
A “Go/No go” test compares the signal quality of the antenna under test with that of a “golden device”
in common location and known signal quality. Go/no go tests are normally performed after connection
with the external device has been established.
Go/no go tests are suitable for checking communication with the host controller and power supply.
The tests also verify that the components are well-soldered.
A simple go/no go test would typically scan and check the signal for a known Bluetooth low energy
device.
☞
Although a Bluetooth scan and subsequent comparative signal test approach is appropriate for
“go/no go” evaluation, this type of testing does not measure RF performance.
A basic RF functional test of the device that includes checking the antenna can be performed with
standard Bluetooth low energy devices configured as remote stations. To obtain stable test results
and prevent possible interference from other radio devices, the device containing the NINA-B4 series
module and antenna should be arranged in a fixed position inside an RF shield box.
