DHCTs with Three LED Indicators
734375 Rev H
119
DHCTs with Three LED Indicators
Explorer DHCTs with three front-panel LEDs display the codes associated with
downloading, installing, and booting into the SARA as a series of flashing lights
using three LEDs on the front panel.
The following table shows an example of a CVT download sequence of front-panel
LED displays that appear after AC power is applied to the DHCT.
Stage LED Indicators
TV Monitor
Description
1
The left LED blinks,
the middle LED
blinks, the right LED
blinks and stays lit.
The “wave” appears each time
the DHCT resets. The DHCT is
initializing and testing the
system. The wave provides a
visual cue as to when to press
buttons to force auxiliary
functions.
2
POWER LED blinks.
or
The rotating border appears
when the DHCT boots into the
OS.
3
LEDs rotate left
(through step 5).
This pattern appears if the DHCT
can tune to the last known good
frequency in NVM and acquires
the CVT.
Go to stage 9 of this table.
4
If the DHCT cannot acquire the
CVT through a known good
QAM frequency, it scans the
recommended QAM frequencies.
Go to stage 6 of this table.
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