Sharp IQ-8920 Operation Manual page 247

4.
and within 80 cm of each other.
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Transferring single entries
1. Turn on both units.
2. On the sending unit, select the entry you want to send in
the Index mode or display it in the View mode.
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Place the two units so that their
Do not leave the unit cover more than three-quarters
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open during transfer or it will break the infrared transfer.
When transferring entire applications or files, or entries
marked as secret, both units must be unlocked (see p.
282).
Although infrared transfer requires no special hardware,
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it is easily affected by ambient conditions and other
factors such as external light, undercharged batteries,
large transfer distance, transfer angle, etc. As a result,
while infrared transfer is in itself quite easy, there is
considerable scope for errors, failure to transfer data
and incomplete data transfer (missing data). It is
therefore recommended that you confirm the received
data after an infrared transfer.
Avoid direct sunlight.
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Keep the infrared port clean with a soft, dry cloth. Dust
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on the port will make transfer difficult.
Single entries can be transferred in all applications.
infrared ports are in line