User's Manual

Smart Machine Smart Decision

SIM7100A_User Manual_V1.01 2014-12-11

Figure 34: Antenna matching circuit (AUX_ANT)

In above figure, R1, C1, C2 and R2 are used for diversity antenna matching. By default, the R1, R2 are 0

Ohm resistors, and the C1, C2 are reserved for tuning.

4.3 GNSS (GPS and GLONASS)

SIM7100A merges GNSS (GPS/GLONASS) satellite and network information to provide a

high-availability solution that offers industry-leading accuracy and performance. This solution performs

well, even in very challenging environmental conditions where conventional GNSS receivers fail, and

provides a platform to enable wireless operators to address both location-based services and emergency

mandates.

4.3.1 GNSS Technical specification

Tracking sensitivity -159 dBm（GPS） -158 dBm（GLONASS）

Cold-start sensitivity -148 dBm

Accuracy (Open Sky) 2.5m (CEP50)

TTFF (Open Sky) Hot start <1s Cold start 35s

Receiver Type 16-channel, C/A Code

GPS L1 Frequency (1575.42±1.023MHz),

GLONASS: 1597.5~1605.8 MHz

Update rate Default 1 Hz

GNSS data format NMEA-0183

GNSS Current consumption (WCDMA/GSM Sleep mode) 100mA (Total supply current)

GNSS antenna Passive/Active antenna

Note: Performance will vary depending on the environment, antenna type and signal conditions and so

on.