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Installation and Setup Chapter 2
AG-STAR User Manual Rev 2 17
2.2 Additional Features and Information
This section contains information on the additional features of the AG-STAR, which may affect the overall
design of your receiver system.
2.2.1 Status Indicators
LED indicators on the AG-STAR provide the status of the receiver. Table 3, AG-STAR LED Status Indicators
shows the meaning of the LED states in the expected sequence after power is applied.
Troubleshooting:
• If the power is on but the yellow LED does not flash within one minute, then no satellites are being
tracked. There may be excessive blockage or the AG-STAR may be defective. Make sure the AG-STAR
has an unobstructed view of the sky. Try power cycling the AG-STAR.
• If the yellow LED is flashing but doesn’t progress to solid yellow within one minute, then insufficient
satellites are being tracked or the signal quality is poor and ephemeris data cannot be received.
Normally, four satellites are sufficient for a valid position as long as they are widely distributed in the sky.
If LED is stuck on blinking yellow, there may be excessive signal blockage or the AG-STAR may be
defective. Make sure the AG-STAR has an unobstructed view of the sky. Try power cycling the AG-STAR.
• 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
AG-STAR is configured to enable SBAS positions (SBASCONTROL ENABLE and
SELECTCHANCONFIG). For DGPS, make sure the AG-STAR 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.
• The green LED blinks when SBAS is detected then it comes on solid when SBAS is enabled. The LED
will stay dark if SBAS is not detected.
Table 3: AG-STAR LED Status Indicators
Red
Yellow
Green
Condition
Off Off Off Power is not available.
On Off Off Power is available but no satellites are being tracked 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 SBAS tracking, but not enough data for enhanced solution.
On On On Position valid in an enhanced accuracy mode
(WAAS/EGNOS/MSAS/DGPS).
Flashing means that the LED is turning on and off at a 1 Hz rate - 0.5 seconds on and 0.5
seconds off.