MIA-M10Q-Integration manual
$GNTXT,01,01,02,ANTSTATUS=INIT*3B
$GNTXT,01,01,02,ANTSTATUS=OK*25
ANTSUPERV=AC SD OD PDoS SR (indicates open circuit detection added - OD)
If ANT_DETECT is pulled low to indicate no antenna connected:
$GNTXT,01,01,02,ANTSTATUS=OPEN*35
If ANT_DETECT is left floating or pulled high to indicate antenna connected:
$GNTXT,01,01,02,ANTSTATUS=OK*25
2.4.1.7 Antenna status reporting
The antenna detection and antenna power status that is available in UBX-MON-RF and NMEA notice
messages, is based on the antenna's physical state. The required antenna supervisor configuration
keys depend on the selected antenna supervisor implementation (three-pin or two-pin).
Table 17 and Table 18 present a summary of the antenna status that is available in the antStatus
and antPower fields of the UBX-MON-RF message. Refer to the interface description [3] for more
information.
Status Description
DON'T KNOW Antenna status is unknown.
INIT Antenna power control feature is initialized (if CFG-HW-ANT_VOLTCTRL is enabled).
SHORT A short is detected from the antenna input. That is, a lot of current is drawn from the active antenna.
OPEN Antenna is not detected. That is, little or no current is drawn from the active antenna.
OK Antenna is detected and no short is detected.
Table 17: Available antenna detection status
Status Description
DON'T KNOW CFG-HW-ANT_VOLTCTRL not configured.
OFF GNSS OFF or a short is detected and CFG-HW-ANT_PWRDOWN is enabled. Note that this status
also applies when GNSS is restarted via CFG-RST or implicitly via CFG-GNSS, when GNSS selection is
reconfigured, or when GNSS is stopped in software standby mode and the off state of the power save
mode on/off (PSMOO).
ON GNSS ON and no short/open is detected from the antenna input. Similarly, when there is a short and
CFG-HW-ANT_PWRDOWN is not enabled or auto-recovery is enabled.
Table 18: Available antenna power status
Table 19 shows some possible combinations of the antenna supervisor configuration and the
expected antenna status based on the physical state of the antenna. Note that the short detection
takes priority over the open detection and "X" in Table 19 implies an unconfigured or undetected
physical state. In addition, CFG-HW-ANT_PWRDOWN requires that CFG-HW-ANT_CFG_VOLTCTRL
and CFG-HW-ANT_CFG_SHORTDET are enabled. Likewise, CFG-HW-ANT_RECOVER requires CFG-
HW-ANT_PWRDOWN to be enabled.
The antenna supervisor is re-initialized after issuing a reset with RESET_N pin or changing
any of the antenna supervisor configuration keys. Therefore, if the default configuration has
changed, it is recommended to save the antenna supervisor configuration to BBR to ensure
that the updated configuration is applied after a reset.
Configuration keys Physical antenna state Reported antenna status
VOLTCTRL SHORTDET OPENDET PWRDOWN RECOVER Short circuit Open circuit antPower antStatus
TRUE X X X X NO NO ON OK
UBX-21028173 - R01
2 Receiver functionality Page 32 of 89
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