Alpha Technologies DSM3 for XM2 - Technical Manual - Manual (Page 76)

76 745-814-B8-001, Rev. C (03/2014)
Fig. 9-3, LED Functionality and Indications
9.3 System Status Indicators and Reset button
As viewed from the front of the unit, the DSM3 Series utilizes light emitting diodes (LEDs) to indicate
system status. During system startup, the LEDs will first blink momentarily then indicate the current status
of a variety of parameters on the DSM3 Series Communications Module. The LEDs indicate alarms, RF
power level status, battery string connectivity and communications activity with the network. A description
of each LED follows.
LED Status Behavior Indication
ALM/RDY: Alarm and Ready
N/A OFF No power or malfunctioning DSM3 Series
GRN
ON Reset of the DSM3 Series is in process
Steady Blinking Normal operation
RED
Blinking more OFF than ON Minor Alarm SCTE-HMS configured
Blinking more ON than OFF Major Alarm SCTE-HMS configured
REG: Upstream ranging and
registration lock.
GRN
OFF No power, upstream frequency undetermined
OFF / ON
Power on, downstream locked, upstream frequency ranging,
DHCP request in progress
ON CMTS registration completed
DS: Downstream RF Carrier
detection and lock.
GRN
OFF No power / downstream carrier
OFF / ON Power on, downstream carrier frequency searching
ON Downstream carrier lock
ACT: CPE Activity status GRN
OFF No Ethernet communications activity
OFF/ON
Momentary flash while CPE communications ongoing via
the Ethernet craft port
LNK: CPE Link status GRN
OFF No Ethernet link
ON Link on Ethernet Craft port
RF Rx/Tx Power Level
Indicator
TRI
OFF No RF detected
Blue
Rx/Tx Power at a warning level as set within the
SCTE-HMS Property Table
Green Rx/Tx RF Power level within tolerance
Red
Rx/Tx Power at an alert level as set within the
SCTE-HMS Property Table
COM: AlphaBus
communications.
GRN
OFF No AlphaBus Communications
OFF/ON
Momentary flash - AlphaBus Port communications
active
BATT A/B GRN ON/OFF ON (steady) if battery string(s) connected correctly
BATT C/D GRN ON/OFF ON (steady) if battery string(s) connected correctly
9.0 Start Up and Verification
9.3.1 Detailed LED Descriptions
After power is applied or a reset occurs, all LED's will flash in certain patterns indicating the cable
modem chipset is starting or restarting. Once it is ready it will begin the DOCSIS requirement of
searching for the downstream frequency lock and the LED's will follow the detailed descriptions
below.
ALM/RDY - Alarm/Ready
The ALM/RDY - During normal operation, this LED blinks GREEN, indicating a heartbeat pulse
from the processor. The frequency of flashing by this LED provides a visual alert for power
supply discrete major and minor alarms, if configured in the property and discrete property tables
of the SCTE-HMS MIB. The ALM LED (RED) is factory defaulted OFF. Refer to Section 6.3
for information on configuring the DSM3 Series for active monitoring and alarming. If an event
triggers an HMS alarm, the ALM/RDY LED blinks RED according to the alarm type until the alarm
has been resolved. For a minor alarm, the frequency of flashing (RED) will be more OFF than
ON and for a major alarm the frequency of flashing will be (RED) more ON than OFF. If there are
multiple active alarms, including one or more major alarms with one or more minor alarms, the
major alarm will take precedence in terms of the indication.
ALM/RDY
REG
ACT
LNK
RF
BATT A/B
BATT C/D
COM
DS