Antennapower - Novatel EuroPak-15ab User Manual

Chapter 5
5.3.2

ANTENNAPOWER

This command enables or disables the supply of electrical power from the internal (see Section 2.2.3 on Page
29 for information on supplying power to the antenna) power source of the receiver to the low-noise amplifier
(LNA) of an active antenna.
There are several bits in the Receiver Status (see Table 45, Receiver Status on Page 95) that pertain to the
antenna. These bits indicate whether the antenna is powered (internally or externally) and whether it is open
circuited or short circuited.
On startup, the ANTENNAPOWER command is set to ON and the L1/E5a card powers the antenna. If the
receiver identifies a short circuit (5 seconds over 0.125 A), antenna power is turned OFF, the receiver status
word, see the RXSECSTATUS log on Page 93, shows the antenna power as off and shows the antenna as
shorted. Antenna current and voltage details are output in the SYSTEMLEVELS log, see Page 98. If the
EuroPak-15ab receives another ANTENNAPOWER ON command, the L1/E5a card tries to power the antenna
again. If it finds the same shorted condition, the above consequences repeat. If there is not another shorted
condition, the receiver continues to power the antenna and the receiver clears the status word bits. After a
shorted condition, the receiver does not try to power the antenna unless you issue an ANTENNAPOWER
command. If you issue an ANTENNNAPOWER OFF command, after the shorted condition, the receiver clears
the shorted bit.
Abbreviated ASCII Syntax:
ANTENNAPOWER
Field
Field
Type
1 header
2 flag
ASCII Example:
ANTENNAPOWER ON
50
FLAG
ASCII Binary
Value Value
This field contains the Abbreviated ASCII command name. See Section
4.1 on Page 34.
OFF 0
ON 1
Description
Disables internal powering of
antenna.
Enables internal powering of
antenna.
EuroPak-15ab Receiver User Manual Rev 1
Commands
Message ID: 98
Binary Binary Binary
Format Bytes Offset
H 0
Enum 4 H