AX-ConfigurationUtility User Manual
14
3.
This field allows customization of the RSSI settling time. Longer settling times give
more stable RSSI measurements at the expense of higher current consumption.
Changes are written to the expert panel.
Make sure you understand the following points:
•
An important part of the process of powering-up the receiver and deciding whether
a preamble signal is present takes a time inversely proportional to the data rate.
To achieve minimum current consumption, you should therefore use the maximum
possible data rate (100kbps). The time the receiver searches for a preamble signal
can be customized via the TMGRXPREAMBLE1 register in the expert panel.
•
Frequency tracking (AFC) requires settling time, which adds to the receiver start-
up time and therefore increases the average current consumption. Large data rates
and precise frequency references render frequency tracking unnecessary.
•
The average receiver (idle) current is proportional to the wake-up frequency. On
the other hand, in the remote control mentioned above, the wake-up frequency
determines how quickly the receiver will react.
•
Mind that the current estimate displayed in the main panel is the idle current in
absence of a signal. Thus, while the RX wakes up periodically, actual packet
reception is the exception in this mode, occurring only e.g. if a remote-control
button was pressed. This is in contrast to the
Synchronized with TX
mode; in
which a packet is expected each time the RX wakes up.
