NXP Semiconductors
QN908x
DK User Guide
QN908x-DK
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© NXP B.V. 2017. All rights reserved.
User guide
Rev. 1.0
— June 2017
13 of 28
3.3 RF connective test with CBT
The QN908x module RF signal can be tested by the on-trace RF connector. This RF
connector is manufactured by Murata. When performing the RF test with the CBT
instruments system, you may need an expansion board to match the signal voltage level
from UART to the RS232 interface. The RS232 expansion board can be powered from
the QN908x DK Board through connectors. The connection of the two boards is shown in
Fig 15
.
Fig 15. RF CBT test with the expansion board
Before the RF test, download the Controller Mode binary file to the QN908x module to
put the QN908x into the DTM mode. Connect an RF cable from the QN908x module to
the CBT and set the CBT RS232 baud rate to 115200 bit/s. After that, start the RF test.
4. QN9080 USB dongle
4.1 Dongle hardware
Fig 16. Dongle hardware
The USB dongle works together with the QTool and behaves either as a master or as a
slave when talking to the QN908x DK or other devices. As shown in
Fig 17
, the USB
dongle receives commands from QTool via a virtual COM port, which initializes the
QN9080 dongle either as a master or slave device. All tests can be performed by QTool
after the initialization.
