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參數(shù)資料
| 型號： | CE5038 |
| 廠商： | Intel Corp. |
| 英文描述： | DVB-S2 Advanced Modulation Satellite Tuner |
| 中文描述： | DVB - S2的先進(jìn)調(diào)制衛(wèi)星調(diào)諧器 |
| 文件頁數(shù)： | 17/41頁 |
| 文件大小： | 463K |
| 代理商： | CE5038 |
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CE5038
Data Sheet
16
Intel Corporation
2.3 RF Bypass
The CE5038 provides an independent bypass function, which can be used for driving a second receiver module.
The electrical characteristics of the RF input are unchanged by the state of the RF bypass.
The bypass provides a differential buffered output from the input signal with a nominal 3.5 dB gain. The unused
output should be terminated as in Figure 2 on page 2.
The bypass function is enabled by a single register bit and is not disabled by either the
PD
bit or the SLEEP pin.
When disabled the bypass function is in a ‘power-down’ state. On power up the bypass function is enabled.
Figure 9 - RF Input and Output (bypass) Return Losses
2.4 Baseband Filter
The filter bandwidth is controlled by a Frequency Locked Loop (FLL) the timing of which is derived from the
reference crystal source by a reference divider. Five control bits set the system reference division ratio and the
baseband filter bandwidth can be programmed with a further six control bits for a nominal range of 4 - 40 MHz
1
.
1. specification compliant over the range 8 - 35 MHz.
-30
-25
-20
-15
-10
-5
0
900
100
0
110
0
120
0
130
0
140
0
150
0
160
0
170
0
180
0
190
0
200
0
210
0
220
0
Frequency (M Hz)
R
S11 RFBypass On
S22 RFBypass On
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