CIRCUIT DESIGN MU-1 Kullanım Kılavuzu - Sayfa 14

USB Arayüzleri CIRCUIT DESIGN MU-1 için çevrimiçi göz atın veya pdf Kullanım Kılavuzu indirin. CIRCUIT DESIGN MU-1 17 sayfaları. Embedded low power radio modem mu-1/mu-1 usb interface kit

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4.2 The Antenna

In systems where a non-directional antenna is required, it is important that the antennas of the transmitting station

and target stations stand vertically in order to exploit communication performance to the maximum. If the planes of

polarisation of the radio waves do not match, receive sensitivity may drop significantly.

Note that if, for reasons peculiar to the equipment, the antenna must be inside the case, communication

performance will be very significantly degraded when handled in the ways below, since these methods contravene

antenna theory. It is the responsibility of the user to test performance thoroughly when designing equipment.

1. Putting the antenna inside a metal case

2. Wrapping the antenna around the MU1-USB itself

3. Locating the antenna beside the ground pattern of your circuit board

4. Fitting the antenna inside by bending it

5. Cutting the antenna to make it shorter

The antenna of the MU1-USB is a 1/4λ whip antenna. Whip antennas are antennas that substitute the ground as

one end of a dipole antenna. For this reason the ground has a very important meaning. Although the main unit of the

MU1-USB has the function of a ground, in order to exploit its performance fully, connect it to the largest possible

ground pattern when mounting it on your circuit board.

In addition, in the case of two way communication between fixed stations, inclining the whip antenna of the MU-1

forwards may increase its communication range. Carry out tests in the specific environment of use.

4.3 Regulatory Compliance

The MU1-USB is a product that uses an USB interface to interface with external equipment. The MU1-USB is made

for embedding in another final product, and is not a stand-alone product. The regulatory compliance assessment of

the MU1-USB in accordance with the R&TTE Directive depends on the final product in which the MU1-USB is

embedded. Regulatory compliance assessment should be carried out on the responsibility of the manufacturer of

the final product.

For details of the CE mark, refer to the MU-1 operation guide.

Point:

The MU-1 radio modem has passed the regulatory compliance assessment in accordance with R&TTE Directive

EN1999/5/EC as a stand-alone product, and has received the CE mark.

4.4 Cautions

1. Always use double shield USB cable for connecting the MU1-USB.

2. Devise ways of isolating the MU-1 as far as possible from sources of noise, including noise from other

embedded equipment.

3. Arrange the MU1-USB so that it will not be covered by the operator's hand or the like.

4. The MU1-USB does not have a waterproof structure. If the antenna is located outside the main unit, use a

structure that prevents water droplets from entering the case.

Chapter 5 How to Develop a Program

The program that controls the MU1-USB (MU-1 + MU1-USBIF) is a program that accesses the COM port.

The method of developing a program is basically the same as for the MU-1, except for accessing a virtual COM port.

Refer to "Chapter 5 How to Develop a Program" in the MU-1 operation guide.

OG_MU1-UIK_v20e

OPERATION GUIDE

Circuit Design, Inc.