American access system ADV-1000 Guia do Utilizador descarregar pdf (Página 369)

1 Indicate the number of bits on the card [# of

bits on card field].

2 Enter the Bits to sum for even parity (indicat-

ing an even number of ones in a block of binary

code), and the Bits to sum for odd parity.

Parity helps in determining if the numbers

coming into the reader are correctly formatted.

For example: with a 26-bit Wiegand, the even

parity start bit is 1, and the number of bits is 13.

The start bit for odd parity is 14, and the number

of bits is 13.

3 Site code bits typically start at 2 and contain 8

4 In a standard 26-bit Wiegand-formatted card, the

Cardholder ID bits begin at 10 and contain 25

5 Issue code bits are not used with standard a

26-bit Wiegand-formatted cards, however some

card manufacturers, allow a two or three bit code

in addition to the site code.

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American access system ADV-1000 Guia do Utilizador Página 369