Layout Gu Uideline - Quectel EC25 series User Manual

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