Standardisation - RFID: Fundamentals and Applications in Contactless Smart Cards and Identification - page 253

9.44 µ s 9.44 µ s 9.44 µ s 9.44 µ s 9.44 µ s 9.44 µ s 9.44 µ s 9.44 µ s

Pulse position for 00

Pulse position for 01

Pulse position for 10

Pulse position for 11

Figure 9.35 '1 of 4' coding arises from the combination of eight time slots of 9.44 µ s length.
The value of the digit to be transmitted in the value range 0-3 can be determined from the time
position of a modulation pulse

Table 9.15 Data rates of the two transmission modes

Data rate ASK ('on-off keying') FSK

'Long distance mode' 6.62 Kbit/s 6.62Kbit/s/6.68Kbit/s

'Fast mode' 26.48Kbit/s 26.48Kbit/s/26.72Kbit/s

9.2.4 ISO 10373 - Test methods for smart cards

ISO 10373 provided a standard relating to the testing of cards with and without a chip.
In addition to tests for the general quality characteristics, such as bending stiffness,
resistance to chemicals, dynamic torsional stress, flammability, and dimensions of cards
or the ultra-violet light resistance of the data carrier (since EEPROM memories lose
their content when irradiated with UV light a special test has been developed to ensure
non-sensitivity to this), specific test procedures have also been developed for the latest
methods of data transmission or storage (magnetic strips, contact, contactless, optical).
The individual test procedures for testing magnetic strips (ISO 7811), contact smart
cards (ISO 7816) or contactless smart cards (ISO 14443, ISO 15693) were summarised
in independent parts of the standard for the sake of providing an overview (Table 9.16).
However, in this section we will deal exclusively with the parts of the standard that
are relevant to RFID systems, i.e. Part 4, Part 6 and Part 7.