u-blox ANTARIS 4 - Page 76

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4.3.4.1 Short and Ope it Active Ant
ection o es to TIM-4x and LEA-4x receiv ption o
Antenna rvisorc onfiguredbya (usingonlyUBXbinarymessage).
en enable  active a supervisor p t messag  (status reporting in NMEA and/or
inaryp )whic atesallchange rcuitry(disabledantennasupervisor,antenna
uitryok,
ircuit, t)andshu lydown
tivean supervisorprovidesthemeans eanten circuitsandto
antennasupplyoff,ifashortcircuitisdetec
stateafter
power-upis“ActiveAntennaOK”.
n Circu enna Supervisor
This s nly appli ers with the exce f LEA-4M.
The Supe anbec serialportmessage
Wh d the  antenn roduces serial por es
UBXb rotocol hindic softheantennaci
circ
shortc opencircui tstheantennasupp ifrequired.
Theac
shutthe
tenna tochecktheactiv
ted.
naforopenandshort
Thefollowingstatediagramapplies.Theinitial
No
Super-
vision
Active
Antenna
OK
Open
Circuit
d tedetec
Short
Circuit
Powerup
SCND_N
User controlled events
Enable Supervision
Short Circuit
FW <5.00:
Reset,
Powercycle
Events AADET_N, AA_
Disable Supervision
detected
Supervision
open circuit
detected, given
FW >=5.00:
Periodical
reconnection
attempts
Disable
No longer short
circuit
OCD enabled
op
Short Circuit
detected
detected
tional


 ailable on LEA-4M and NEO-4S. However, both modules still output antenna
d.

Figure 64: State Diagram of Active Antenna Supervisor
Note This feature is not av
status messages. NEO-4S always reports “ANTSTATUS=OK” whereas LEA-4S will always report
“ANTSTATUS=SHORT”.Bothmessagesshouldbeignore

GPSModules-SystemIntegrationManual(SIM)(incl.ReferenceDesign) ReceiverDescription
GPS.G4-MS4-05007-A1
  Page 76