HEIDENHAIN TNC 306 Technical Manual - Manual (Page 421)

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TNC 406/TNC 306 1 Introduction 3/97
1.1.4 Data transfer rate
The data transfer rate of an interface is given in baud and indicates the number of bits of data
transmitted in one second.
1 baud =
[
1
Bit
s
]
Common baud rates are:
110, 150, 300, 600, 1200, 2400, 4800, 9600, 19 200 and 38 400
The time required for transmission of one bit (tB) can be calculated from the baud rate:
tB
t
"1"
"0"
tB =
1
Baud rate[
bits
s
]
For example, a baud rate of 19,200 baud will have a bit duration of tB = 52.083 µs.
The number of characters transmitted per second can be calculated from the baud rate and the
transmission format:
Characters per second =
Baud rate[
bits
s
]
Number of bits per character
Example:
With a transmission format of one start bit, seven data bits and two stop bits, and assuming a data
transfer rate of 300 baud, the number of characters transmitted per second will be
300 Baud
10 bits
= 30 characters per second