5.3 Wireless Performance Specifications
5.3.1 TIS
Total Isotropic Sensitivity (TIS) is an important specification that determines the MS2131's
receiving performance. Table 5-2 describes the TIS specifications of the MS2131.
Table 5-2 MS2131 TIS specifications
Frequency
Band
W2100 W1900 W900 W850 G1900 G1800 G900 G850
TIS
specification
(dBm)
–103 –101.5 –100 –98.5 –98.5 –100 –100 –98.5
The preceding design specifications can be realized only when the MS2131 is in optimal layout with
comprehensive shielding measures. Strictly follow the antenna design and stacking requirements to help
realize the optimal MS2131 performance.
5.3.2 TRP
Total Radiated Power (TRP) is an important transmission performance specification of the
MS2131. Table 5-3 describes the optimal TRP specifications of the MS2131.
Table 5-3 MS2131 TRP specifications
Frequency
Band
W2100 W1900 W900 W850 G1900 G1800 G900 G850
TRP
specification
(dBm)
18 16.5 18 16.5 22.5 24 27 25.5
The preceding TRP specifications can be realized only when the MS2131 is in optimal layout. Therefore,
strictly follow the antenna design and stacking requirements to help realize the optimal MS2131
performance.
5.4 Antenna Design Requirements
The MS2131 has its antennas embedded and therefore, you do not need to design the antenna.
To ensure the MS2131 antenna performance, the following layout requirements shall be met:
1. The USB dongle be connected to a PCB that has a dimension not less than 10 cm x 10
cm (L x W) (as ① in Figure 5-2). The larger the PCB, the better the antenna
performance can be.
2. If the PCB is approximately a square, the layout shown in Figure 5-2 (excluding the ②
part) be adopted. The USB dongle is placed in the upper or lower part of the PCB side
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