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參數(shù)資料
| 型號(hào)： | W93910 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 尋呼電路 |
| 英文描述： | ERMES(Enhanced Radio Emessage System) Paging Protcol Decoder(增強(qiáng)的無線電子信息系統(tǒng)尋呼解碼器) |
| 中文描述： | TELECOM, PAGING DECODER, PDSO28 |
| 封裝： | SSOP-28 |
| 文件頁數(shù)： | 11/35頁 |
| 文件大小： | 267K |
| 代理商： | W93910 |
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W93910
Publication Release Date: Auguest 1999
- 11 - Revision A1
CHANNEL SCAN CONTROL
The channel scanning and switching are controlled by the decoder. Table 7 shows the channel number
and frequency. In channel scan mode, the decoder will first search the home channel, defined by the
CH3
CH0. Therefore, the synthesizer should be programmed to home channel before the channel
scan mode. If the pager can not detect a valid signal in the home channel, the pager will change to the
next channel to search until the decoder lock to the signal. The scanning sequence is shown in Figure 5,
and needs to be followed to avoid losing signal.
OPTION BIT
CH3
CH0
0000
0010
0100
0110
1000
1010
1100
1110
1111
1101
1011
1001
0111
0101
0011
0001
FUNCTION
Home channel number
0
2
4
6
8
A
C
E
F
D
B
9
7
5
3
1
RF center frequency
169.425 MHz
169.475 MHz
169.525 MHz
169.575 MHz
169.625 MHz
169.675 MHz
169.725 MHz
169.775 MHz
169.800 MHz
169.750 MHz
169.700 MHz
169.650 MHz
169.600 MHz
169.550 MHz
169.500 MHz
169.450 MHz
Table 7. Channel number and frequency
Ch 0
Ch 2
Ch A
Ch C
Ch 3
Ch 1
Figure 5. Channel scan sequence
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