18
User Handbook Memor2000
IrDA Communication
The Memor2000 can be equipped with a module containing an IrDA interface. This
interface enables the Memor2000 to communicate cordlessly (using infrared
light) with other equipment fitted with an equivalent interface, such as a PC, printer
or cellular mobile phone. For communication via IrDA to function correctly, the
application program in the Memor2000 must be suited to the IrDA module.
There are a number of IrDA standards. The Memor2000 fulfils:
• Hardware (range, angles etc.) conforms to IrFYS (IrSIR max 38,400 bps).
• Software supports IrLAP 1.1, IrLMP 1.1, TinyTP 1.1 and IrCOM 1.0.
The Ir-interface fitted as standard to the Memor2000 does not conform to the
IrDA standard.
Using IrDA
As an IrDA connection employs infrared light, an unobstructed line of sight is
required between the Ir-windows of the different units. Ir-windows also have a
limited angle of vision, about 30°, so it’s important to site the units correctly. Best
results are achieved at a distance of 5 to 20 cm between units, and the smallest
possible angle of deviation, although communication is possible up to a distance
of 1 metre.
The drawing gives an idea of the IrDA operating angle from the Memor2000. Note
that the Ir-window in the module is angled slightly downwards.
Troubleshooting
If the IrDA link doesn’t work, the reason may be among the following:
•
Bright ambient light (sunlight, fluorescent light etc.) can sometimes
dazzle the IrDA receiver.
• The beam of IrDA light is interrupted by some object.
• The distance between the Ir-windows is too great.
• The angle between the Ir-windows is incorrect.
• The Ir-windows are dirty, scratched or damaged.
• Interference from another Ir-source (TV remote-controller etc.).
• Software in the two units is not compatible.
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