Enfora MLG0208PB001 ユーザーズマニュアル

Enfora Enabler II-G Assisted GPS 
Modem Integration Guide 

 
GSM Transmit Power 

1800/1900 MHz............................ GSM Power Class 1 (30 dBm 

± 2 dB @ antenna connection) 

850/900 MHz................................ GSM Power Class 4 (33 dBm 

± 2 dB @ antenna connection) 

1800/1900 MHz............................ <-106 dBm, GPRS Coding Scheme 1 (CS1) 
850/900 MHz................................ <-106 dBm, GPRS Coding Scheme 1 (CS1) 
 

Tracking........................................ ……………. 106  mA average  
Acquisition .................................... ……………. 116 mA average  
Time to First Fix (cold start)………................... 60 seconds (typical) 

Time to First Fix (warm start)…… ................... 35 seconds (typical) 

Time to First Fix (hot start)……….................... 3 seconds (typical) 

 

1.5 GHz ........................................ -142 dBm, without assistance data 
1.5 GHz ........................................ -158 dBm, with assistance data 
 
 

 

To ensure lowest possible EMI emission, maximum thermal conduction and mechanical integrity, all 
metal tabs on the GSM module shield must be soldered down on to a continuous ground plane. The 
PCB trace that feeds the RF output port should be 50ohm characteristic impedance, coplanar, or 
routed into internal layers to keep the top layer continuous around and underneath the device. 
Provide ample ground vias around metal tabs, the RF trace and launch pad. If possible, keep I/O and 
power traces away from the RF port.   

 

 
 
 

MLG0208PB001 

15 

Version1.01 – 10/3/2006