Computime Limited CT-EM2503 사용자 설명서
CT-EM250
ZigBee-Ready RF Transceiver Modules
Computime Ltd. All rights reserved
Confidential
Page 13 of 15
PCB Layout Recommendations
For recommended layout pads for the module, please reference Mechanical
Dimensions.
The area underneath the module should be covered with solder resist in order to
prevent short circuiting the test pads on the back side of the module. A solid ground
plane is preferred. Unconnected pins should be soldered to the pads, and the pads
should be left floating. For the module with integrated antenna, the RF pad can be
soldered, but the pad should not be connected further. The two ground pads (pin10
and pin12 should be grounded for all variants.)
When using the onboard chip antenna, careful attention is required to the layout of the
PCB where the module is mounted. In Figure 3 a mother PCB is shown with a
recommended placement of the module.
Figure 3 A recommended placement of the module on a mother PCB (Shaded area is ground-plane
on mother PCB)
FCC Approvals
The CT-EM2503 has been designed to meet all national regulations for World-wide
use. Using the integrated antenna it conforms to FCC CFR 47 Part 15 (USA).
This device complies with Part 15 of the FCC rules. Operation is subject to the
use. Using the integrated antenna it conforms to FCC CFR 47 Part 15 (USA).
This device complies with Part 15 of the FCC rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference,
and (2) this device must accept any interference received, including
interference that may cause undesired operation.
The device CT-EM2503 carries FCC authorization and is marked with the FCC ID
Number. Whilst any device into which this authorized module is installed will not
The device CT-EM2503 carries FCC authorization and is marked with the FCC ID
Number. Whilst any device into which this authorized module is installed will not