NXP Semiconductors
UM10883
PN7462 family Quick Start Guide - Development Kit
UM10883
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User manual
COMPANY PUBLIC
Rev. 1.6 — 14 May 2018
319816
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one parameter might require another parameter to change, too. At the end, even several
“optima” might occur, which show similar performance.
There might be external influence like noise (e.g. from an LCD or other electronic
circuitry) resulting in a different optimum.
So, it is very difficult to define a clear and deterministic approach to optimize these Rx
settings, especially without knowing the external influence. However, for a high-end
reader design these settings play a significant role for a good performance.
An easy solution is the Rx Matrix Test. This tool simply tries each combination of
settings, and reports the number of proper receptions.
6.10.2 Rx Matrix test principle
The Rx matrix controls the PNEV7462B evaluation board and allows to configure:
•
Free number of trials (per register combination)
•
Free number and combination of register bits
•
Free limit of minimum and maximum value
•
Free choice of “protocol” (RF Configuration)
•
Optional voltage level control of the LMA, using a Keysight AWG
The tool supports the digital and analog test signals, if needed. Especially the digital test
signal might be helpful to trigger a LMA test setup.
The Fig 41 shows the basic test setup, using a reference card, placed on the PCD
antenna in a certain distance. The reference card might a typical type A or B card (or any
other card that is supported by the PN7462 family IC).
(1) The PICC can be any type A or B card in principle, depending on the used protocol.
Fig 41. Basic Rx Matrix Test set up
