GE864-QUAD V2 Hardware User Guide
1vv0300841 Rev.5
–
2017-05-11
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights
Reserved.
Page 28 of 77
6.2.
Power Consumption
The GE864-QUAD V2 power consumptions are:
T
h
e
G
S
M
s
y
s
t
e
m
i
s
m
a
T
he GSM system is made de in a way that the RF transmission is
not continuous, else it is packed into bursts at a base
frequency of about 216 Hz, the relative current peaks can be
as high as about 2A. Therefore the power supply has to be
designed in order to withstand with these current peaks
without big voltage drops; this means that both the electrical
design and the board layout must be designed for this current
flow.
If the layout of the PCB is not well designed a strong noise
floor is generated on the ground and the supply; this will
reflect on all the audio paths producing an audible annoying
noise at 216 Hz; if the voltage drop during the peak current
absorption is too much, then the device may even shutdown as a
consequence of the supply voltage drop.
TIP:
The electrical design for the Power supply should be made
ensuring it will be capable of a peak current output of at
least 2A.
GE864-QUAD V2
Mode
Average
(mA)
Mode description
SWITCHED OFF
Module supplied but Switched Off
Switched Off
<62 uA
IDLE mode
AT+CFUN=1
16.0
Normal mode: full functionality of the
module
AT+CFUN=4
16.0
Disabled TX and RX; module is not
registered on the network
AT+CFUN=0 or =5
3.9
Paging Multiframe 2
2.5
Paging Multiframe 3
2.4
Paging Multiframe 4
1.5
Paging Multiframe 9
CSD TX and RX mode
GSM VOICE CALL
GSM900 CSD PL5
240
DCS1800 CSD PL0
175
GPRS (class 10) 1TX
GPRS Sending data mode
GSM900 PL5
225
DCS1800 PL0
160
GPRS (class 10) 2TX
GPRS Sending data mode
GSM900 PL5
420
DCS1800 PL0
290
