Cisco Headend System Release 2.5 사용자 가이드
Chapter 2 Staging the Tuning Adapter
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4025012 Rev B
LED Indicators Displayed During a Software
Download
Devices provide feedback during the process of downloading, installing, and
booting into the SARA using LED indicators.
Location of LED Indicators on the Tuning Adapter
Tuning Adapters display the codes associated with downloading, installing, and
booting into the OS as a series of flashing lights using the POWER LED indicator
light 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 Tuning Adapter.
Note: The front-panel LED indicator may change for each stage of the Tuning
Note: The front-panel LED indicator may change for each stage of the Tuning
Adapter software download process. Therefore, in the following table, the LED
displays that correspond to certain stages of the download process may be repeated
or skipped. In other words, the stages do not always occur in the order shown.
Stage LED Indicator
Description
1
On for several
seconds, then blinks
on and off steadily
The Tuning Adapter is booting into the OS.
2
Blinks twice, pauses,
repeats
The Tuning Adapter is scanning the recommended QAM
frequencies for the CVT.
3
Blinks three times,
pauses, repeats
The Tuning Adapter is downloading and installing software
into flash memory.
4
On for two seconds,
off for one second,
on for two seconds,
reboot
The Tuning Adapter has installed the software update into
flash memory.
Note: There will be a slight delay between this step and the
Note: There will be a slight delay between this step and the
next step as the Tuning Adapter reboots.
5
On for several
seconds, then blinks
on and off steadily
The Tuning Adapter resets and boots into the OS.
6
Blinks eight times,
pauses, repeats
The Tuning Adapter is in Service Disconnect (brick) mode.