SECURITY
STATUS
NXP Semiconductors
QN908x
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© NXP Semiconductors N.V. 2014. All rights reserved.
Application note
Rev. <MM.mm> — 27 April 2016
14 of 33
Figure 14 QN_VCC Power pin
3.3 RF Connective Test with CBT
QN908x Module RF signal can be tested by on-trace RF connector. This RF connector
manufacturer is Murata. When performing the RF test with CBT instruments system,
there may need an expansion board to match signal voltage level from UART to RS232
interface. The RS232 expansion board can get power supply from QN908x DK Board
through connectors. The connection of two boards shown in Figure 15.
Figure 15 RF CBT test with Expansion Board
Before RF test, you should download “Controller Mode” software to QN908x Module or
make the QN908x enter the DTM mode. Then Connect an RF cable from QN908x