User's Manual

Transponder PT21/PT23
Specifications A-1
Appendix A
Specifications
This appendix gives technical specifications for the Transponder PT21/PT23, the Reader RD21, the
Exciter EX21, and the AC Source TRM95. It also gives information on system performances and
special features.
Transponder PT21/PT23
LF Receiver • Configuration: Direct detection for 125.0 kHz signals modulated On/Off (OOK) with 610 Hz.
• Minimum LF excitation duration: 150 ms.
• Carrier Frequency (125.0 kHz) Bandwidth @3dB:12 to 18 kHz.
• Sensitivity: better than H = 10mA/m[80 dBμA/m] for optimum excitation.
UHF Transmitter • Carrier Frequency, nominal: 433.92 MHz ±50 kHz, stabilized by a SAW resonator.
• Carrier Frequency, max. variation: ±100 kHz,due to temperature and aging
• Modulation Type: Frequency-Shift Keying (FSK).
• Total Frequency Deviation, nominal: 15 ±3 kHz.
• Total Frequency Deviation, max. variation: 8 to 40 kHz.
• Radiated Power (ERP): less than 10 μW.
• Data Rate: 19.2 or 38.4 kbps.
Excitation Signal The Transponder is only
awaken by signals accepted by the LF Receiver that have a duration of at
least 150ms with a determined pattern of modulation.
Programming • Mode: LF field.
• Data Rate: 1.2 kbps.
• Parameters: see the RFID System S21 Reference Guide.
Writing and
Transmitting Data
Asynchronous, NRZ, using a specially developed protocol.
Message Format For more information, see Appendix B, Transponder PT21/PT23 Messages.
Power Supply 3 V/150 mAh, lithium cell battery.
Power
Consumption
Maximum 3 μA in sleep mode; 2.5mA in transmission mode.