EnOcean GmbH STM300U 사용자 설명서
USER MANUAL
© 2013 EnOcean | www.enocean.com
TCM 300x / TCM 320x User Manual | Page 28/54
TCM 300 / TCM 300C / TCM 300U
TCM 320 / TCM 320C / TCM 320U
50
GND
GND
GND
GND
X
remove
TCM320C:
X
remove
4.3.1 Positioning of the whip antenna
Positioning and choice of receiver and transmitter antennas are the most important factors
in determining system transmission range.
Positioning and choice of receiver and transmitter antennas are the most important factors
in determining system transmission range.
For good receiver performance, great care must be taken about the space immediately
around the antenna since this has a strong influence on screening and detuning the an-
tenna. The antenna should be drawn out as far as possible and must never be cut off.
Mainly the far end of the wire should be mounted as far away as possible (at least 15 mm)
from all metal parts, ground planes, PCB strip lines and fast logic components (e.g. micro-
processors).
Do not roll up or twist the whip antenna!
Radio frequency hash from the motherboard desensitizes the receiver. Therefore:
PCB strip lines on the user board should be designed as short as possible
A PCB ground plane layer with sufficient ground vias is strongly recommended
See also section 4.5 for power supply requirements. Problems may especially occur with
switching power supplies!
4.3.2 Mounting 50
antennas
For mounting the receiver at bad RF locations (e.g. within a metal cabinet), an external 50
antenna may be connected. The whip antenna must be removed in this case!
TCM 320 provides soldering pads for an SMA connector, e.g. from Tyco Electronics: