Getac Technology Corporation ZX70U Manual Do Utilizador
AS3993 – AN13 – Received Signal Strength Indicator (RSSI)
www.ams.com
Revision 2.0 / 6/22/12
page 3/17
2. Key Features
• Interface
o
Between the Controller and Host Computer: USB (optional UART)
o
Between the Controller and the AS3993 is SPI via a low cost pin header
connection
o
Between the RF board and the Antenna we use a U.FL (50 Ohm) SMA (Male)
• 5V power supply from USB.
• GUI
o
Adjust Output Power
o
Adjust Receive – Sensitivity
o
Adapt to different frequency schemes (FCC ETSI)
o
Change Gen2 specific parameters like BLF, Coding, Anti-Collision Slots, …
o
Diagnostic Features: RSSI Measurement, Reflected Power Measurement
o
Support for sending AS3993 related direct commands
o
Advanced Tag Manipulations: R/W to different memory banks, define passwords
o
Associate tags with other applications like media player
o
View and easily manipulate register settings with advance tool tip text.
• Low Power Consumption: complete reader system is only 780mW (typ), 830mW
(max)
• Fully Gen 2 compliant, ISO 18000-6b & 6c
• Differential TX chip-output configuration
• Differential RX chip-input configuration
• External power amplifier RF2172
• Maximum output power 22 dBm
scalable in 20 steps
• Low cost MCU: Microchip (PIC24FJ64GB004)
• Indicator LEDs