your position is our focus
4
out On/
In
,
the
receiver
wi
is
good
–
never
turn
it
off.
If
there
is
loss
of
s
is
no
signa
r-up,
the
receiver
il
go
to
an
O
r
a
predefined
p
T
ition
time)
and
acq_off
(off
time
after
an
u
sition)
de
the
startup
behavior
a
.
This
can
be
an
initial
startup
or
a
subsequent
startup
after
an
unsuccessful
reacquisition
proc
T
reacq_off
configure
the
reacquisition
procedure
after
a
GPS
signal
loss.
If
t
to
O
.2.7.7
FXN with
Off Time
this
mode
ll
–
as
long
as
there
GPS
coverage
self
ignal,
or
if
there
l
at
powe
w l
time
out
and
ff
State
fo
eriod.
_acq
(acquis
T_
nsuccessful
acqui
fine
fter
an
off
time
edure.
_reacq
(reacquisition
time)
and
T_
he
GPS
signal
is
lost,
the
receiver
tries
during
T_reacq
to
reacquire
the
signal.
If
this
fails,
the
receiver
goes
ff
State
for
T_reacq_off.
After
this
time
the
receiver
will
startup
as
defined
above.
GPS signal lost
signal OK
GPS
signal
no signal
signal OK
time
T_reacq
T_reacq_off
T_acq
time-
outs
System
state
on
on
off
Figure 56: FXN without On/Off Time, GPS signal is lost in Full Power State
Example
Use
on/off
time
Disabled
T_on
[s]
Not
used
T_off
[s]
Not
used
Absolute
align
Disabled
Base
TOW
[s]
Not
used
T_acq [s]
60
T_acq_off [s]
120
T_reacq [s]
5
T_reacq_off [s]
60
Operation
As
long
as
there
is
good
GPS
coverage,
the
receiver
will
keep
running.
If
there
is
loss
of
signal
for
at
least
5
seconds,
the
receiver
will
shut
down
for
60
seconds.
After
that
off
time,
the
receiver
will
try
to
find
the
signal
for
60
seconds.
If
that
fails
it
will
shut
down
for
another
120
seconds.
Table 15: Example settings FXN without On/Off Time
GPS
Modules
-
System
Integration
Manual
(SIM)
(incl.
Reference
Design)
Receiver
Description
GPS.G4-MS4-05007-A1
Page 69
