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参数资料
| 型号： | WE905 |
| 厂商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 0.1 - 1GHx Single Chip FM Transceiver |
| 中文描述： | 0.1 - 1GHx单芯片FM收发器 |
| 文件页数： | 25/39页 |
| 文件大小： | 623K |
| 代理商： | WE905 |
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Winceiver WE904/WE905
WiNEDGE & WiRELESS
0.1 - 1GHz Single Chip FM Transceiver
2003 WiNEDGE & WiRELESS PTE LTD
Page 31
Rev Date: 2003 May 27
Manual Mode (Bit 3 = 0; AGC OFF)
In this mode, receiver gain stages are manually controlled by programming the Mode register bit 10 to
14.
RF Mixer Attenuation Control Table
Mode Register Bit
11
10
RF Mixer
Attenuation, dB
0
30
0
1
20
1
0
10
1
0
Baseband Gain and RF Pad Control Table
Mode Register Bit
Baseband Stage Attenuation, dB
14
13
12
1
st Block
2
ndBlock
3
rd Block
4
th Block
RF Pad Attn,
dB
0
10
0
1
10
0
1
0
10
0
1
0
10
0
1
0
10
0
1
0
1
0
Tse Signal Evaluation Time (Bit 21 & 22)
Applicable only if AGC is ON, bit 3 = 1.
To determine the correct gain setting for AGC, the received on-channel signal is integrated in the
baseband section. The integrated signal level is evaluated at regular time intervals: signal evaluation
time Tse. Tse is programmed by bits 21 & 22 of the Mode Register. The available Tse values are
inversely proportional to the demodulator bandwidth, BWdm, allowing for the signal evaluation over a
similar number of baseband cycles of an on-channel signal.
Recommendations for setting Tsi and Tse are as follow:
Recommended value for Tsi is:
Tsi = 0.9ms x (130kHz/BWdm) + 1.6ms + 4.5ms x (65kHz/BWbb)
where BWdm is the demodulator bandwidth and BWbb is the base band bandwidth
Recommended value for Capacitance at GCC pin is:
The recommended capacitance CGCC attached to GCC pin, for a given signal integration time
constant, Tsi, is
CGCC = 330nF x (Tsi / 27ms)
Recommended value for Tse is:
Tse > 2 x Tsi
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相关代理商/技术参数 |
参数描述 |
|---|---|
| WE9104 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Pulse Telephone Dialer |
| WE9110 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Pulse Telephone Dialer |
| WE9140 | 制造商:WINBOND 制造商全称:Winbond 功能描述:TONE/PULSE SWITCHABLE DIALER WITH REDIAL |
| WE9140A | 制造商:WINBOND 制造商全称:Winbond 功能描述:TONE/PULSE SWITCHABLE DIALER WITH REDIAL |
| WE9140B | 制造商:WINBOND 制造商全称:Winbond 功能描述:TONE/PULSE SWITCHABLE DIALER WITH REDIAL |
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