OPERATION GUIDE
OG_STD-601B_v40e
Circuit Design, Inc.
18
10.10 "@R" RSSI acquisition
(enabled only in the reception)
Reads out the RSSI level.
Input
'@R'
only without the value.
Example: Reads out the RSSI level.
Control command: @R
Control response: *R64
The absolute value of the RSSI level is returned in hexadecimal.
The RSSI level can be obtained by decimalizing the value part of the control response and
adding "- (minus)" . *R64 is -100 dBm.
* If the '@R' command is issued in any state other than reception, the error response '*E01* will be
returned.
10.11 "@K" Image rejection calibration
Performs calibration on the image rejection of the receiver part. Calibration is required if the
temperature changes more than 20 °C .
If there is a temperature change of more than 20 °C after the last calibration, the error response '*E10'
is returned and High level is output at the INT terminal to warn of the need for calibration. It takes
about 120 ms for calibration.
Example: Performs the image rejection calibration
Control command: @K
Control response: *K
* Even if calibration is not performed, the receiver sensitivity will be maintained but the receiver
characteristics against the image frequency of ' RX frequency - IF-IF (RX frequency-937.5 kHz)' may
be degraded.
