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Quectel EC25-A User Manual page 47

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Ho
ot start
@open sky
@
Accuracy
CE
EP-50
(GNSS)
NOTES
1.
Trackin
ng sensitivity
y: the lowest
on posi
itioning for 3
3 minutes.
2.
Reacqu
uisition sens
sitivity: the lo
fix posi
tion again w
within 3 minu
3.
Cold st
tart sensitivi
ity: the lowe
position
n within 3 m
inutes after
4.3. Layo
out Guid
deline
The followin
ng layout gu
ideline shou
Maximi
ize the dista
ance betwee
Digital
circuits such
h as USIM c
should
be kept awa
ay from the
Use gr
round vias a
around the
isolatio
n and protec
ction.
Keep 5
50ohm chara
acteristic imp
Refer to Ch
hapter 5 for
GNSS refer
EC25-A_Us
E
All manuals and user guides at all-guides.com
Autonomou
XTRA enab
Autonomou
@open sky
t GPS signa
al value at th
owest GPS
signal value
utes after los
ss of lock.
est GPS sig
gnal value a
executing c
cold start com
uld be taken
into accoun
en the GNSS
S antenna, th
card, USB i
nterface, Ca
antenna.
GNSS trace
e and sens
pedance for
rthe ANT_GN
rence design
n and antenn
ser_ManualC
Confidentia
TBD
us
TBD
bled
us
TBD
y
he antenna
port for whic
ch the modu
e at the ante
enna port fo
or which the
at the anten
na port for
which the m
mmand.
nt in your de
esign.
he main ant
enna and th
he Rx-divers
amera modu
ule, Display
connector a
sitive analog
g signal trac
ces to provi
NSS trace.
na considera
ation.
al / Release
d
46 / 6
69
L
LTE Module
e
EC25-AU
ser Manua
al
s
s
m
ule can keep
p
module can
n
module fixes
s
sity antenna.
.
and SD card
d
de coplana
r

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