Reader-to-tag protocol

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Reader-to-tag protocol

5.1

Reader-to-tag Power-Up and Power-Down

The reader power-up and power-down waveform, and timing requirements are specified in

the EPCglobal Class 1 generation 2 RFID UHF specification, revision 1.0.9.

5.2

Reader-to-tag RF modulation

A reader can communicate with the tag by modulating the RF carrier using DSB-ASK, SSB-

ASK or PR-ASK, as specified in EPCglobal Class 1 generation 2 RFID UHF specification,

revision 1.0.9.

Figure 6.

Reader-to-tag RF envelop

Table 5.

1.

Characterized only.

Parameter

Symbol

Min

Typical

Max

Units

Modulation depth

(A-B)/A

80

90

100

%

RF envelop ripple

0

0.05(A-B)

V/m

RF envelop rise and fall time

0

0.33 Tari

µs

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