Multi-Tech Systems 92U03G23720 ユーザーズマニュアル

Chapter 4 – Interfaces

Wireless ModemModule MTMMC-G-F1 and MTMMC-G-F2 Developer’s Guide

RF Interface

The impedance is 50 Ohms nominal.

RF Connector

The RF connector is MMCX standard type. An antenna can be directly connected through the matting connector
or using a small adapter.

RF Performances

RF performances are compliant with the ETSI recommendation 05.05 and 11.10.
The main parameters are:

Receiver:

EGSM Sensitivity : < -104 dBm

GSM 1800/GSM 1900 Sensitivity : < -102 dBm

Selectivity @ 200 kHz : > +9 dBc

Selectivity @ 400 kHz : > +41 dBc

Dynamic range : 62 dB

Intermodulation : > -43 dBm

Co-channel rejection : + 9 dBc

Transmitter:

Maximum output power (EGSM) : 33 dBm +/- 2 dB

Maximum output power (DCS/PCS) : 30 dBm +/- 2 dB

Minimum output power (EGSM): 5 dBm +/- 5 dB

Minimum output power (DCS/PCS): 0 dBm +/- 5 dB

H2 level : < -30 dBm

H3 level : < -30 dBm

Noise in 925 - 935 MHz : < -67 dBm

Noise in 935 - 960 MHz : < -79 dBm

Noise in 1805 - 1880 MHz : < -71 dBm

Phase error at peak power : < 5 ° RMS

Frequency error : +/- 0.1 ppm max

DTE/DCE Interface Rates

The table below indicates the anticipated modem-to-computer interface rates for both the 7.2 bits-per-sample
rate and the 8 bits-per-sample rate.

Projected DTE/DCE Interface Rates for 7.2/8K Hz Sample Rates

Bits per Sample

Projected DTE/DCE I/F
Rate @ 7.2K Hz

Projected DTE/DCE I/F
Rate @ 8K Hz Sample Rate

0.50

4800

9600

19200

38400

57600

115200

Fast