Manual

68 746-257-B2-001, Rev. B (01/2014)
Fig. 9-3, LED Functionality and Indications
9.3 System Status Indicators and Reset button
As viewed from the front of the unit, the IDH4 Series utilizes light emitting diodes (LEDs) to indicate
system status. During system startup, the LEDs will rst blink momentarily then indicate the current status
of a variety of parameters on the IDH4 Series transponder. 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 IDH4 Series
GRN
ON Reset of the IDH4 Series is in process
Steady Blinking Normal operation
RED
Blinking more OFF than ON Minor Alarm SCTE-HMS congured
Blinking more ON than OFF Major Alarm SCTE-HMS congured
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 ashes 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 ashes - 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
ALM/RDY
REG
ACT
LNK
RF
BATT A/B
BATT C/D
COM
9.0 Start Up and Verification
9.3.1 Detailed LED Descriptions
After power is applied or a reset occurs, all LED's will ash 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 ashing by this LED provides a visual alert for power supply
discrete major and minor alarms, if congured 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 conguring the IDH4 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 ashing (RED) will be more OFF than ON and
for a major alarm the frequency of ashing 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.
DS