User's Manual

SIM908 Document

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PCL=0 320

PCL=7 155

DCS 1800

PCS 1900

PCL=15 122

VBAT-peak

Peak current During Tx burst 2 A

4.9 Electro-Static Discharge

SIM908 is an ESD sensitive component, so more attention should be paid to the procedure of handling and

packaging. The ESD test results are shown in the following table.

Table

13: The ESD characteristics (Temperature: 25 , Humidity: 45 %)℃

Pin Contact discharge Air discharge

VBAT ±5KV ±10KV

GND ±4KV ±10KV

RXD, TXD ±3KV ±6KV

Antenna port ±5KV ±10KV

SPKP/ SPKN

MICP/ MICN

±3KV ±8KV

PWRKEY ±3KV ±8KV

4.10 Radio Characteristics

4.10.1 Module RF Output Power

The following table shows the module conducted output power, it is followed by the 3GPP TS 05.05 technical

specification requirement.

Table 14: SIM908 GSM 900 and GSM 850 conducted RF output power

GSM 900 and EGSM 850

Tolerance (dB) for conditions

PCL Nominal output power (dBm)

Normal Extreme

0-2 39 ±2 ±2.5

3 37 ±3 ±4

4 35 ±3 ±4

5 33 ±3 ±4

6 31 ±3 ±4

7 29 ±3 ±4

8 27 ±3 ±4