ZED-F9P-Integration Manual
UBX-18010802 - R02

4 Receiver description Page 32 of 114
Advance Information
See the table below for an example of possible combinations of values for configuration items
related to GPS signals and whether they mean the constellation is enabled or not.
master switch
CFG-SIGNAL-GPS_ENA
signal switch
CFG-SIGNAL-GPS_L1CA_ENA
signal switch
CFG-SIGNAL-GPS_L2C_ENA
Constellation
enabled?
false (0) false (0) false (0) no
false (0) false (0) true (1) no
false (0) true (1) false (0) no
false (0) true (1) true (1) no
true (1) false (0) false (0) no
true (1) false (0) true (1) yes
true (1) true (1) false (0) yes
true (1) true (1) true (1) yes
Table 9: Example of possible values of configuration items for the GPS constellation
On ZED-F9P receivers only some combinations of signals are supported. For all systems,
both L1 and L2 signals need to be either enabled or disabled, with the exception of the
BeiDou B2 signal, which may be disabled individually. Attempts at configuring unsupported
combinations will be rejected by the receiver. The receiver responds to such UBX-CFG-
VALSET messages with a UBX-ACK-NAK and, if configured, additionally sends the warning:
"invalid sig cfg".
4.3.4 Antenna supervisor configuration
This section describes the antenna supervisor configuration, its use and restrictions.
The antenna supervisor is used to control an active antenna. The configuration of the antenna
supervisor allows the following:
• Control voltage supply to the antenna, which allows the antenna supervisor to cut power to the
antenna at the event of a short circuit or optimize power to the antenna in Power Save Mode
• Detect a short circuit in the antenna and auto recover the antenna supply in such event
• Detect an open antenna, which can be used to tell if the antenna has been disconnected
See the table below, for a description of the configuration items related to the antenna supervisor
operation.
Configuration Item Description Comments
CFG-HW-ANT_CFG_VOLTCTRL Enable active antenna voltage control
CFG-HW-ANT_CFG_SHORTDET Enable short circuit detection
CFG-HW-ANT_CFG_OPENDET Enable open circuit detection
CFG-HW-ANT_CFG_PWRDOWN Power Down Antenna supply if Short
Circuit is detected
CFG-HW-ANT_CFG_RECOVER Enable auto recovery in the event of a
short circuit
To use this feature, short circuit
detection should be enabled. See CFG-
HW-ANT_CFG_SHORTDET
Table 10: Antenna Supervisor Configuration
It is possible to obtain the status of the antenna supervisor through UBX-MON-RF message.
Moreover, any changes in the status of the antenna supervisor are reported to the host interface
in the form of notice messages. See the tables below for a description of the antenna state status
and the antenna power status.
Status Description
OFF Antenna is off
ON Antenna is on
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