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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： | 27/39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 33
Rev Date: 2003 May 27
ANALOG VS DIGITAL OUTPUT (BIT 17)
The receiver AFO output can be configured to either analog or digital mode.
In the Digital Mode, the demodulated signal goes through an internal data slicer before being output
as CMOS compatible logic data.
Polarity of RX data is the same as received FM deviation, i.e. no data inversion. A positive FM
deviation produces a 1 and a negative FM deviation produces a 0. However, please note that due to
the design of TX VCO, a 1 in the TX data produces a negative FM deviation and a 0 produces a
positive FM deviation. Hence, when two WE2408 are used as data communication pair, the RX data
will be inverted compare to the TX data.
In the Analog Mode, the output pin provides the recovered, demodulated audio signal without passing
through the data slicer.
Polarity of RX waveform is the opposite of the received FM deviation, i.e. signal inversion. A positive
FM deviation produces a lower voltage and a negative FM deviation produces a higher voltage. Since,
TX FM modulation is inverted, when two WE2408 are used as analog communication pair, the RX
signal will look the same as the TX signal, i.e. no inversion.
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