Murata Electronics North America XDM2140 Manual Do Utilizador
5.0 RF Specifications
5.1 Radio Specifications
Parameter
Min
Typ
Max
Units
Comments
Operating frequency
2.4000
2.4835
GHz
Number of channels
15
Channel separation
5
MHz
Occupied channel bandwidth
2.7
MHz
at -20 dBc
Frequency accuracy
-50
+50
kHz
Modulation
IEEE 802.15.4 DSSS
Raw data rate
250
kb/s
Receiver operating maximum input level
0
dBm
Receiver sensitivity
-92.5
dBm
At 50% PER, V
DD
= 3 V,
25 °C
-90
dBm
At 1% PER, V
DD
= 3 V,
25 °C, (inferred from 50%
PER measurement)
PER measurement)
Output power, conducted
+8
dBm
V
DD
= 3 V, 25 °C
Table 7
5.2 Antenna Specifications
The antenna must meet specifications below. When the XDM2140 is placed inside an enclosure, the antenna should be mounted
such that the radiating portion of the antenna protrudes from the enclosure, and connected using a coaxial cable. For optimum
performance, allow the antenna to be positioned vertically when installed. The XDM2140 has been FCC certified as a module with
both a dipole antenna and a patch antenna. Any 2.4 GHz dipole antenna or 2.4 GHz patch antenna with a gain less than or equal
to 12 dBi may be used without the need for any FCC type acceptance testing. If a different antenna type or a higher gain dipole or
patch is to be used, please contact RFM Technical Support for more information.
such that the radiating portion of the antenna protrudes from the enclosure, and connected using a coaxial cable. For optimum
performance, allow the antenna to be positioned vertically when installed. The XDM2140 has been FCC certified as a module with
both a dipole antenna and a patch antenna. Any 2.4 GHz dipole antenna or 2.4 GHz patch antenna with a gain less than or equal
to 12 dBi may be used without the need for any FCC type acceptance testing. If a different antenna type or a higher gain dipole or
patch is to be used, please contact RFM Technical Support for more information.
Antenna Parameter
Value
Frequency range
2.4000 - 2.4835 GHz
Impedance
50 ohms
Maximum VSWR
3:1
Table 8