ST ST25RU3993, Руководство пользователя

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UM2268 Rev 6 49/68
UM2268 Reader Settings
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4.2.2 Frequency Diagnosis panel
•
Frequency : Defines the frequency at which the CW or modulated carrier is output
•
Cont Modulation mode :
– Normal : the reader continuously transmits a NAK command at the specified
frequency for a given duration.
– Pseudo Random : the reader outputs the carrier modulated by pseudo random.
– ETSI Test Mode : the reader outputs the test signal defined in EN 302 208.
•
Cont Modulation A value : Display the decimal value of the PLL A register
•
Cont Modulation B value : Displays the decimal value of the PLL B register
•
Active time : Defines the duration the TX output is ON. When the timer expires TX
output is automatically switched OFF.
•
Unlimited : Manually control of the TX output ON and OFF state.
Note: Leaving TX output ON for an extended period generates a significant amount of heat
generation on the external power amplifier.
•
Continuous Modulation : Generates a continuous modulation at the selected
frequency.
•
Continuous Wave (CW) : Generates a continuous carrier wave at the selected
frequency.
4.2.3 Direct Commands panel
•
Command : A selection menu which lists ST25RU3993 direct commands that can be
used.
•
Send : Sends the selected command to ST25RU3993 which then carries out the
corresponding function.
4.2.4 Supply Options panel
To measure the power consumption of the ST25RU3993 reader IC, the device power mode
and settings can be changed here.
•
Voltage regulator (Dropout) : Internal voltage regulators maintain a specified drop-out
voltage while the supply/battery voltage may change.
• Device power mode : Allows to bring the reader IC into various supply power states.
•
Device Bias : Allows to tweak the main bias setting of ST25RU3993 reducing the
current consumption at the expense of lower output power and receive sensitivity.