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24 SMART-AG User Manual Rev 2
Chapter 2 Installation and Setup
Table 4: SMART-AG LED Status Indicators
Flashing means that the LED is turning on and off at a 1 HZ rate - 0.5 seconds on and 0.5 seconds off.
Debugging:
• If the power is on but the yellow LED doesn’t flash within one minute, then no satellites are
tracking. There may be excessive blockage or the unit may be defective. Make sure the unit has
an unobstructed view of the sky. Try power cycling the unit.
• If the yellow LED is flashing but doesn’t progress to solid yellow within one minute, then
insufficient satellites are tracking or the signal quality is poor and ephemeris data can’t be
received. Normally, four satellites are sufficient for a valid position as long as they are widely
distributed in the sky. If it is stuck on solid yellow, there may be excessive blockage or the unit
may be defective. Make sure the unit has an unobstructed view of the sky. Try power cycling the
unit.
• If the yellow LED is on, but the green doesn’t turn on within five minutes than no SBAS or DGPS
positions are available. If you are using SBAS, make sure SBAS is available in your area and that
the unit is configured to enable SBAS positions (SBASCONTROL ENABLE). For DGPS, make
sure the unit is configured with the correct serial port parameters and to accept the DGPS protocol
your area is using and that your data modem is connected and working.
2.2.3 CAN Setup
See Section 3.1, Communications with the Receiver starting on Page 26 to begin collecting data.
Collected data can be transmitted to a host computer over a serial port using a program such as CDU.
Refer to its on-line Help for details. See also the SMART-AG commands and logs, detailed in this
manual.
Red Yellow Green
Condition
Off Off Off Power is not available
On Off Off Power available but no satellites are tracking yet
On Flashing Off Tracking at least one satellite but not a valid position
On On Off Position valid in basic autonomous mode
On On Flashing An SBAS signal is being tracked but sufficient data for SBAS
operation has not yet been received.
On On On Position valid in an enhanced accuracy mode
(WAAS/EGNOS/MSAS/DGPS or RTK)