Filter
Top Products
- 4 -
A
C
T
-IR320L User’s Manual
Apr. 18, 2003
Version 0.1
2. Features
Long distance transmitting/receiving adapter by using 455KHz ASK-IR technology.
Supports max. 15 meters transmitting/receiving distance.
9.6kbps, 19.2kbps and 38.4kbps RS232 baud rate supported.
Instantly convert RS232 Port to IR, without special IrDA protocol SW and use existing
application SW.
True cable-to-IR replacement using ASK-IR technology.
No SW Modification Required: Single IR Speed using IR320L, used as a pair.
No buffer in circuit, no delay causes.
3. Applicable description
ACT-IR320L uses 455KHz ASK-IR technology to support long distance transmitting/receiving,
ASK-IR is a technology that base on sub-carrier and it is not compatible to IrDA. Therefore, it
should be used as a pair when using IR320L.
Once ACT-IR320L is connected to serial port of host device, it enters ready mode, the LED is
lighting. There are two ways can make IR320L to enter active mode. One is the host device sends
some data to it by passing RxD pin, another is that IR320L receives ASK sub-carrier from outside
and passes those data to TxD pin. When IR320L is in active mode, the LED is flashing.
ACT-IR320L detects RxD pin’s level and turn the ASK sub-carrier on and off when it is sending data,
thus it is no need to care about baud rate setting, but limited by the frequency of ASK modulation,
the baud rate supported up to 38.4Kbps.
Generally, there is two ways to connect to a serial port. One is 3-wires(Flow control free), another
is 9-wires(Flow control enables). Based on the ACT-IR320L is no buffer in circuit, it is a 3-wires
operating dongle, it doesn’t has to enable flow control mechanism. It means that it doesn’t detect
the DSR and CTS pins from host device and always pull DTR and RTS pins to high. Application
program should take care about flow control itself.
The radiant intensity of ACT-IR320L relates to angle between two dongles that face to face, the
Angle of half intensity is +/- 10
∘.
It will get more effective performance by adjusting angle.