User's Guide

Elster A3/Alpha Plus Node Hardware
10156-04 3 - 4 EkaNet Hardware Manual
Eka Proprietary and Confidential
3.2.1 What the Blinking Lights Mean
3.2.1.1 The Green LED
During the initial boot up the green LED may blink unevenly. However after 10
seconds the green LED should begin blinking at a steady rate of 1/2 second on
and 1/2 second off. This is considered the node’s “heartbeat.” If the green light
fails to come on, is a solid green, or flashes at any other rate, the node has
malfunctioned and the node must be replaced.
3.2.1.2 The Red LED
During the initial boot up the red LED may blink unevenly. During system
operation the red LED will be a solid red whenever it is communicating with any
other Eka node. If the red light flashes continuously, the node has malfunctioned
and the node must be replaced.
3.3 Elster A3/Alpha Plus Node Specifications
Application Specifications
Compatibility Elster A3/Alpha Plus Meter Pulse Interface
Data storage Stores 1 month of data (1 channel @ 15 min. intervals)
Data Integrity Non-volatile data storage provides extra security in the
event of communication failure or power outage
Advanced features Load profile, remote demand reset
Radio Specifications
Operating frequency 902 - 928 MHz 2.400-2.4835 GHz
Reliable data
transmission
Error detection, correction
and retransmission
Error detection, correction
and retransmission
RF output power (Max.) 20 dBm 20 dBm
Data rate 76.8 Kbps 1 Mbps
Receiver sensitivity -93 dBm (@ 0.1% BER,
+25°C)
Max transmit power 20
dBm
Sensitivity -80 dBm (@
0.1% BER, +85°C)