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TransNET OEM Integration Guide
05-3946A01, Rev. C
Reading RSSI & Other Parameters with LPM Enabled
It may be desired to perform tests and review operational settings of a Remote
radio which has been programmed to operate in the low-power mode. Follow
the abbreviated procedure below to interact with the radio through a local
computer.
• Disconnect the Remote’s antenna to force it to lose sync with the
Master
• Power-down the radio
• Connect a computer running TransNET configuration software to the
Remote’s
DIAG(nostic
) port.
• Power-up the radio
• Reconnect the antenna
• Measure the RSSI or review and change any parameters you desire
Power Consumption Influence by HOPTIME and SAF Settings
shows representative current consumption and data delay values for
various settings of TransNET radios setup for Low Power Mode, LPM (See
). It assumes the primary power voltage is 13.8 Vdc
and the polling rate is minimized to yield best-case power consumption
(current) values.
The more each RTU is polled and asked to transmit, the more current will be
consumed. Therefore, these values are the lowest that can be expected. Power
consumption (current) is inversely related to data delay as shown in the table.
When a radio is sleeping (LPM) mode, it is also waiting longer to deliver the
payload data.
Note, the Store-and-Forward setting has a significant effect on power
consumption, as it effectively doubles the HOPTIME to support LPM
services. For the most power-efficient operation, turn on
SAF
even if you are
not using repeaters.
Table 10. Power Consumption versus Hoptime and SAF Settings
HOPTIME
SAF
Current (ma)
Data Delay
7
OFF
16
350 ms
7
ON
10
780 ms
28
OFF
7
1620 ms
28
ON
4
3360 ms
