Quectel EC25 series User Manual

5.1.3. R
e
The refere
n
matching ci
1. Keep
a
receivi
n
2. ANT_
D
receiv
e
5.2. GN
S
The followi
n
NOTES
E
e
ference
D
n
ce design
o
rcuit for bet
t
a
proper di
s
n
g sensitivit
y
D
IV function
e
diversity.
S
S Ante
n
n
g tables sh
o
E
C25-A_U
s
D
esign
o
f ANT_MAI
N
t
er RF perf
o
A
N
Mod
u
A
Figure
2
s
tance bet
w
y
.
is enabled
b
n
na Inte
r
o
w the GN
S
s
e
r
_Manual
C
N
and ANT
_
o
rmance. Th
N
T_MAIN
u
le
A
NT_DIV
2
7: Referen
c
w
een the
m
b
y default.
U
r
face
S
S antenna
C
onfidenti
a
_
DIVantenn
a
e capacitor
s
R1
C1
NM
R2
C3
NM
c
e Circuit
o
m
ain antenn
U
se the AT
c
pin definitio
n
a
l / Release
a
is shown
a
s
are not m
o
0R
C2
NM
0R
C4
NM
o
f Antenna
a and the
R
c
ommand
AT
n
and frequ
e
d 48 /
6
a
s below. It
o
unted by d
e
Main
antenna
Diversity
antenna
Interface
R
x-diversity
a
T
+QCFG="
d
e
ncy specifi
c
L
EC25-AU
6
9
should rese
e
fault.
a
ntenna to
d
iversity",
0
c
ation.
L
TE Modul
e
ser Manu
a
rve a π-typ
e
improve th
e
0
can disabl
e
e
a
l
e
e
e

Quectel EC25 series Specifications

General

GNSS	GPS/GLONASS/BeiDou/Galileo/QZSS
Operating Temperature	-40°C to +85°C
Storage Temperature	-45°C to +90°C
Form Factor	LCC
Dimensions	29.0mm × 32.0mm × 2.4mm
Category	Cellular Module
LTE FDD	B1/B3/B5/B7/B8/B20
LTE TDD	B38/B40/B41
WCDMA	B1/B5/B8
Interfaces	USB 2.0, UART, PCM, I2C
Operating Voltage	3.3V to 4.3V
SIM Interface	1.8V/3V
Antenna Interface	Main and diversity antenna
Certifications	CE, FCC, PTCRB, GCF, IC, RCM
GSM	850/900/1800/1900 MHz