Alpha Technologies AlphaNet IDH4 for XM3-HP Series - Technical Manual - Manual (Page 74)

74 746-257-B5-001, Rev. A1 (11/2013)
9.3.1 Detailed LED Descriptions, continued
REG - CM Registration
This LED blinks while the modem registers with the DHCP and obtains the configuration file after
downstream channel CM/CMTS negotiation. Once the registration is complete, the LED will display solid
GREEN. This indicates that the IDH4 Series is communicating with the CMTS in the headend.
DS - Downstream Communication
The LED flashes while searching for the downstream DOCSIS channel and is on solid when the
downstream channel is locked. This LED indicates CM downstream signal status. This process may
take several seconds, depending on how long it takes the CM to locate a carrier signal and lock onto a
channel.
ACT - CPE Activity
The CPE activity LED flashes to indicate that data is being transmitted or received between the IDH4
Series and a network device.
LNK - Network Communication Status
The Ethernet link LED remains ON when there is an active connection on the Ethernet port (e.g., a
computer is connected for local diagnostics).
Rx/Tx Power
The Rx/Tx PWR LED tricolor LED provides the quick verification of the modem transmit (Tx) and receive
(Rx) RF power levels. The Rx/Tx PWR LED is GREEN when both the cable modem Tx and cable
modem Rx RF power levels are within the range as specified in Table 9-1, SCTE-HMS Property Table.
It is BLUE when Rx and/or Tx levels are within the “warning” range as specified by the SCTE-HMS
PropertyTable. The LED is RED when Rx and/or Tx levels are outside the range as specified by the
SCTE-HMS PropertyTable.
9.0 Start Up and Verification, continued
Parameter alarm Enable HiHi Hi Lo LoLo Deadband
Rx
docsIfDownChannelPower
(OID:1.3.6.1.2.1.10.127.1.1.1.1.6)
00
(0F*)
150 100 -100 -150 15
Tx
docsIfCmStatusTxPower
(OID:1.3.6.1.2.1.10.127.1.2.2.1.3)
00
(0C*)
550 500 00 00 15
*Values in ( ) denote behavior of the Rx/TX LED if alarmEnable bits are set to ‘00’.
By default, alarmEnable is set to 00 (disabled) to prevent unwanted SNMP traps but the LED behavior will
function as if the alarmEnable were set to the values in the SCTE-HMS Property Table. If the alarmEnable
bits are set to anything other than 00 the LEDs will then follow the behavior of the desired enable bit
setting.
The SCTE-HMS Property Table values translate into the following Rx/Tx Power LED color ranges:
LED Color Rx Range (dBmV) Tx Range (dBmV)
Green +10 to -10 0 to +50
Blue +15 to +10 and -10 to -15 +50 to +55
Red >+15 and <-15 >+55
In addition to the above SCTE-HMS PropertyTable entries, the Tx and Rx levels displayed on the IDH4
Series Web page will each provide colored indicator bars that correlate to the RF LED and SCTE-HMS
PropertyTable thresholds.
Table 9-1, SCTE-HMS Property Table
Table 9-2, Rx/Tx Power LED Color Ranges