參數(shù)資料
型號: PCA5010H
廠商: NXP Semiconductors N.V.
英文描述: Pager baseband controller
中文描述: 傳呼機(jī)基帶控制器
文件頁數(shù): 47/112頁
文件大小: 627K
代理商: PCA5010H
1998 Nov 02
47
Philips Semiconductors
Product specification
Pager baseband controller
PCA5010
6.17.1.3
Baud rate selection
No bits are lost when switching between single and double baud rates as e.g. required for high speed protocol
synchronization. Figure 27 shows how the PCA5010 reacts in this situation.
Fig.27 Transient phase error due to an input signal phase step of 180 degrees for the different baud rates.
handbook, full pagewidth
0
20
40
60
180
0
140
160
MGR342
(2)
(4)
(3)
(5)
(1)
10
30
50
100
60
20
120
80
40
phase
error
number of symbols (time = nr. symbol/baud)
(1) 2 level 1200.
(2) 2 level 1600.
(3) 2 level 3125.
(4) 2 level 2400.
(5) 2 level 3200.
Fig.28 Switching between single and double baud rates (e.g. advanced high speed paging protocol
synchronization).
handbook, full pagewidth
MGR343
demodulated
filtered data
recovered
symbol clock
(symbol interrupt)
2T
2T
T
interval allowed for the
software to change the baud rate
<
1.5T
<
1T
(
= 1/76800 s)
3200 bits/s [T = 1/3200 (s)]
1600 bits/s
1600 bits/s
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