Product specifications

Crescent Integrator’s Manual 50
Table 7-10 LED Indicator Definition
LED Color Function
POWER Red Power indicator – when the Crescent Vector is powered
within the Evaluation enclosure, this LED will illuminate
RESET Green Reset indicator – when the reset button is pressed, this LED
will illuminate. The LED should also flash upon powerup.
Note: the button to initiate reset is inside the enclosure and
we highly recommend using ESD protection when opening
the evaluation enclosure.
1PPS Blue Timing signal: 1 pulse per second – this LED will strobe once
per second once a GPS lock has been attained
MARK Red Mark indicator – upon releasing the mark button, the
manual mark is initiated and the LED will illuminate. Note:
the button to initiate manual mark is inside the enclosure
and we highly recommend using ESD protection when
opening the evaluation enclosure.
GPS Yellow Primary GPS lock indicator –Once the Crescent Vector
achieves a solid GPS lock on the primary antenna, this LED
will remain illuminated. If this LED continues to blink, it
could be an indication of a receiver hardware failure.
S-GPS Yellow Secondary GPS lock indicator – Once the Crescent Vector
achieves a solid GPS lock on the secondary antenna, this
LED will remain illuminated. If this LED continues to blink, it
could be an indication of a receiver hardware failure.
A-GPS Yellow This indicator is not used in this application.
DIFF Yellow Differential lock indicator – this indicator will illuminate
continuously when the Crescent Vector has achieved a solid
SBAS lock with better than a 150 bit error rate (BER) or
when it is successfully receiving externally input RTCM
corrections. If the SBAS BER is higher than 150 but the
receiver is still locked, this LED will blink, showing that lock
is marginal.
DGPS Green DGPS position indicator – this LED will illuminate when the
receiver has achieved a differential position and the
psuedorange residuals are below that set with the $JLIMIT
command. The default value is a psuedorange residual of
better than 10.0 meters. If the residual value is worse than
the current threshold, the green DGPS LED will blink
indicating that differential mode has been attained but that
the residual has not yet met the threshold.
HDG Blue Heading lock indicator – this indicator will illuminate
continuously when the Crescent Vector has achieved a solid
heading lock. If this LED continues to blink, it could be an
indication of a receiver hardware failure.