UM-B-041
SmartBond Production Line Tool
User Manual
Revision 4.8
02-Nov-2022
CFR0012
126 of 170
© 2022 Renesas Electronics
Appendix F RF Path Losses Calibration
To accurately perform radiated tests for 16 DUTs using the Golden Unit or a Bluetooth
®
LE tester,
one should calibrate the setup to know what RSSI value can be expected for non-problematic
devices. Because the distance and the position of each of the 16 DUTs to the GU RF antenna are
different, the calibration process calculates the different path losses to compensate for these
differences. The calculated values are applied to the Production Line Tool configuration as RF path
losses (DA1470x - Path Losses per DUT
), which are added in the RSSI result.
This section describes the process to calculate the RF path losses for each different DUT position.
F.1
Prerequisites
illustrates the prerequisites needed for performing the RF path loss calibration procedure.
Table 65: Prerequisites
# Requirements
Description
1 1 PLT board
1 PLT board with Golden Unit.
Power supply for the PLT.
USB cables for the PLT to the PC.
2
<10 PCBA with 16
DUTs each
At least 10 PCBAs. The more PCBAs used the better.
The PCBAs selected should all work as good as possible.
If a fault device is identified on a PCBA that PCBA should be replaced.
3 1 shielded box
It must be big enough to fit the PCBA and the fixture.
It should have one SMA female to female connector and a small hole to pass the
DUT to PLT cable connections.
4
2 RF cables (1
optional)
One cable to be used from the PLT GU to the shielded box.
One more cable to be used from the shielded box to the RF antenna. (This is
optional since the RF antenna can be directly mounted into the shielded box RF
SMA connector).
The cables should have low attenuation at 2.5 GHz range (<2 dB) and high shielding
effectiveness (>60 dB).
Proposed cables are from Radiall. Cables datasheet:
https://www.radiall.com/media/files/RFCableAssemblies%20D1C004XEe.pdf
●
Flexible cable 2.6/50 D (RD316) P/N: C291 185 067
●
Flexible cable 2/50 D (124416 type) P/N: C291 146 087
●
Flexible cable 2.6/50 D (ECO316D: alternative to RD316) P/N: C291 999 905
●
Flexible cable 5/50 D (ECO142: alternative to RG142) P/N: C291 325 290
●
Flexible cable 5/50 D (Power 142: alternative to RG142) P/N: C291 325 270
●
Flexible cable 6/50 D (ECO230) P/N: C291 326 490
5 DUT fixture
A fixture to be placed inside the shielded box to easily connect the PCBAs to the
PLT.