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TDH2 Datasheet(PDF) 5 Page - List of Unclassifed Manufacturers

Part No. TDH2
Description  UHF Multi Channel Hi Power Radio Modem
Download  11 Pages
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Maker  ETC2 [List of Unclassifed Manufacturers]

TDH2 Datasheet(HTML) 5 Page - List of Unclassifed Manufacturers

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Radiometrix Ltd
TDH2 Data Sheet
page 5
Figure 4: TDH2 transmitting and receiving
The oscilloscope screen capture shows a single byte being transmitted by TDH2. A BiM2-433-64
transceiver is used to capture the transmitted data The character appears on the serial data output
(RXD) pin of the other TDH2 after about 12.5ms. Busy (STATUS) pin is momentarily set high to
indicate the presence of a valid data in the receive buffer of the TDH2.
It can be clearly seen that unlike raw radio modules, TDH2 does not output any noise when there is not
any transmission. Data fed into the TXD input of a TDH2 appears at the RXD output of another TDH2
within radio range in the original form it was fed.
Figure 5: 16kbps Bi-phase encoded continuous data stream (expanded view)
Continuous serial data at 9600bps (above) is encoded as half-cycles of 8kHz (62.5
µs long bit) and 16kHz
µs short bit).

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