
4.8 RF Receiver Characteristics for 802.15.4 DSSS-OQPSK in the 2.4 GHz Band
Unless otherwise indicated, typical conditions are: T
A
= 25 °C, VDD = 3.0V. RF center frequency 2.45 GHz. Measured on RF2G4_IO2.
Table 4.8. RF Receiver Characteristics for 802.15.4 DSSS-OQPSK in the 2.4 GHz Band
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Max usable receiver input
level, 1% PER
SAT
Signal is reference signal
length is 20 octets
—
10
—
dBm
Co-channel interferer rejec-
tion, 1% PER
CCR
Desired signal 3 dB above sensi-
tivity limit
—
-0.2
—
dB
Sensitivity, 1% PER
SENS
Signal is reference signal, packet
length is 20 octets
—
-103.9
—
dBm
Image rejection, 1% PER,
desired is reference signal at
3 dB above reference sensi-
tivity level
IR
Interferer is CW in image band
—
43.5
—
dB
Blocking rejection of all other
channels, 1% PER, desired
is reference signal at 3 dB
above reference sensitivity
level
, interferer is reference
signal
BLOCK
Interferer frequency < desired fre-
quency -3 channel spacing
—
57.6
—
dB
Interferer frequency > desired fre-
3 channel spacing
—
57.5
—
dB
RSSI resolution
RSSI
RES
-100 dBm to +5 dBm
—
0.25
—
dB
RSSI accuracy in the linear
region as defined by
802.15.4-2003
RSSI
LIN
—
+/-6
—
dB
Adjacent channel rejection,
Interferer is reference signal,
1% PER, desired is refer-
ence signal at 3 dB above
reference sensitivity level
ACR
REF1
Interferer is reference signal at +1
channel spacing
—
39.9
—
dB
Interferer is reference signal at -1
channel spacing
—
39.2
—
dB
Alternate channel rejection,
interferer is reference signal,
1% PER, desired is refer-
ence signal at 3 dB above
reference sensitivity level
ACR
REF2
Interferer is reference signal at +2
channel spacing
—
51.1
—
dB
Interferer is reference signal at -2
channel spacing
—
51.6
—
dB
Note:
1. Reference signal is defined as O-QPSK DSSS per 802.15.4, Frequency range = 2400-2483.5 MHz, Symbol rate = 62.5 ksym-
bols/s.
2. Reference sensitivity level is -85 dBm.
3. Due to low-IF frequency, there is some overlap of adjacent channel and image channel bands. Adjacent channel CW blocker
tests place the Interferer center frequency at the Desired frequency ± 5 MHz on the channel raster, whereas the image rejection
test places the CW interferer near the image frequency of the Desired signal carrier, regardless of the channel raster.
MGM210P Wireless Gecko Multi-Protocol Module Data Sheet
Electrical Specifications
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