16
Manual ISM
–
usb.1 / .2
Now, please click
Spectrum analysis
to start the RSSI analysis :
The dialogue shows the current signal strengths in the used frequency range. In this way you can see if
there are additional radio signals in the frequency range which might prevent the radio receiver from
receiving the measuring values or superimpose its radio signal. If this is the case, please try to place the
radio receiver in an area without interferences.
The example above shows the background noise on all frequencies and a weak signal at about
434.4 MHz. Both will in this strength not influence the receiving of values from the ISM or IBRit-rf1 radio
modules.
But a stronger signal might interfere with the communication, even if it is at 434.4 MHz.
Note :
Because the communication between ISM or IBRit-rf1 radio transmitter and radio receiver is
bidirectional, you should additionally do an RSSI measurement in the work area of the radio
transmitter. In this way you can determine if there are radio signals that could interfere with
the communication between transmitter and receiver.
