Intertek Testing Services
Ericsson Inc.
Model: DT-620
FCCID: AXAROA1173201
Report Name: ERI2433.DOC
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3.2.5 Antenna Requirement §15.317
The antenna of the DT-620 can only be replaced by the same type of antenna as specified by the
manufacturer.
3.2.6 Frequency of Operation §15.319(a)
The DT-620 is an isochronous device that transmits from 1920 – 1930 MHz. The spectrum has been split
into eight 1.25 MHz sub-bands. The DT-620 operates in the following channels:
Channel Number
Center Frequency
MHz
0
1929.375
1
1928.125
2
1926.875
3
1925.625
4
1924.375
5
1923.125
6
1921.875
7
1920.625
3.2.7 Digital Modulation Technique §15.319(b)
The DT-620 uses a Differential Pi / 4 DQPSK Differential Quadrature Phase Shift Keying digital
modulation.
3.2.8 Peak Transmit Power
The Peak Transmit Power limit is as follows:
Where P is the Peak Transmit Power, and BW is the Bandwidth in Hertz. The measured bandwidth for the
DT-620 is not greater than 824 kHz. Therefore, the allowable Peak Transmit Power is:
The following table details the peak transmit power measured at the 90 mW setting.
Channel
Frequency,
MHz
Measured Transmit Power
Allowed Transmit Power
0
1929.221
16.6 dBm
19.6 dBm
3
1925.589
16.9 dBm
19.6 dBm
7
1920.739
17.3 dBm
19.6 dBm
BW
uW
PeakPower
×
=
100
dBm
uW
PeakPower
6
.
19
8
.
90
824000
100
=
=
×
=
