CONFIDENTIAL AND PROPRIETARY
The Information contained in this document shall remain the sole exclusive property of s.m.s smart microwave sensors GmbH and shall not
be disclosed by the recipient to third parties without prior consent of s.m.s smart microwave sensors GmbH in writing.
UMRR-0F0002-1D0907-050B00 General Purpose USA Version 1
I
Page 20 of 23
I
November 13, 2014
9
Change the Frequency Band
For some use cases it may be required to run the sensor in a different frequency range than
the default one, to avoid interferences in multi sensor system for example.
The sensor provides 7 possible frequency bands (FB6 … FB12) between 24.075 GHz and
24.175 GHz.
There are two ways to change the sensors frequency band. One way is to change the sensor
ID. With the ID the default frequency band changes as well. This change is non-volatile.
The other way is to change the frequency band by hand, while the sensor ID remains the
same. These changes are volatile and will be reset to default after power down unless you
save them in the EEPROM by sending “Action 136”.
To change the frequency band by hand send the command:
•
ParNo.:
36
•
Value:
6…12 (=frequency index (FI), default = 6 (FI6), see Table 5)
•
Action:
65
•
Format:
Int
then reinitialize the software:
•
ParNo.:
don’t care
•
Value:
1
•
Action:
130
•
Format:
Int
Please note that we use a sensor ID dependent frequency offset (25 MHz) by default:
Frequency Band = Frequency Index + Sensor ID * Offset
Example: (Sensor ID2; Frequency Index 4)
FI4 + 2 * 25 MHz = FB8
