User's Manual

11
Function：Check ID of call sign
Example：ID show “123”
3.2.41 TIMEID 【parameter】
Function：Set the sending interval of call sign (unit: min)
Parameter：0~255
Example：TIMEID 2 show “PROGRAMMED OK”
3.2.42 TIMEID
Function：Check sending interval of call sign
Example：TIMEID show “2”
3.3 Special commands (special commands work only with antenna, so antenna must be connected before
testing)
3.3.1 CCA 【parameter】
Function：Check the received signal strength value (dBm) of the specified channel (MHz).
Parameter choice：410.000 – 470.000
Example：CCA 466.125 show (two options)：
1） CCA 【parameter 1】：【parameter 2】，Example “CCA 466.125:-106.125”，indicate the
received signal strength value is -106.125 dBm in the current 466.125MHz channel.
2） “CCA 466.125:ERROR”，indicate the test is failed, but it is not indicated that all the
channels to be tested aren’t applicable. It indicates only the failure for the test operation without
connecting the antenna, or too close to the emission source, etc. may lead to the test failure.
3.3.2 RSSI
Function：Check the received signal strength value.
Example：RSSI show (two options)：
1） RSSI indicates it doesn’t receive any data in the protocol, so it can’t show the received signal
strength value.
2） RSSI -52.478 -48.063，-52.478（dBm）Refers to the average value of the signal strength
received in the last 20 times or less than 20 times in the protocol (because from power-on
to the execution of the RSSI command, no more than 20 data packets are received in the
protocol); -48.063 (unit: dBm) refers to the received signal strength of the last intra-protocol
packet reception of RSSI command execution.
3
、Main Power Supply
TRM101 can operate with any 3.3V power supply, which comes from data interface connector with good filtered.
The power must supply 1A current at least and featured with current-limiting, even if you make radio modem
operating on low power mode (0.5W).