EasyRadar Sensor Evaluation Kit
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3.2.3 RF params:
Min / Max frequency: displays the result of the frequency scan.
This scan is performed on every reset and when the scan
frequency command is sent.
Scan / Set Max: performs a frequency scan for the installed
frontend to read the maximum achievable bandwidth. Sets the
ramp bandwidth to this maximum value.
bandwidth: bandwidth used for the frequency ramp (usually max
6000 MHz, sensor/board dependent)
base-frequency: start-frequency of the ramp (sensor/board
dependent)
Important
:
these 2 values define the voltage ramp applied to the VCO. Care should
be taken not to drive the voltage into saturation on either end. See troubleshooting
section for further information.
VCO Divider: 64, fixed, board dependent
Frontend selection: use this to load standard values for the used
frontend.
3.2.4 BB processing:
Ramp time: is reported back by the module. Calculated using
the selected sampling frequency and the number of samples
ADC Clock Divider: sets the sampling frequency, a higher value
means slower sampling.
Number of samples: samples per ramp
Number of ramps: number of ramps integrated (to improve S/N)
-> higher values, slower measurements but better S/N. Too high
values may smear out signal due to phase noise of the system.
Downsampling: reduce number of samples after sampling. Fill
void with zeroes. "1" means average of 2 values, "2" of 4
values, etc. Higher values improve accuracy but reduce max
range.
FFT size: number of FFT bins
Average: averaging of FFT data. "1" means average of 2 FFTs,
etc.
3.2.5 Target Recognition:
CF-Guard: number of guard cells before and after cell under test
CF-Size: number of FFT bins used on either side of the guard
cells.
CF-Threshold: detection threshold in dB above noise floor.
Format: in which format range data is sent/displayed. Values
are 'bin', 'mm', 'cm':
•
bin: the number of the pin which receives the data
•
'mm': the data is displayed in 'mm', meaning the bin
number is converted into 'mm', depending on the
accuracy
•
'cm': the data is displayed in 'cm', meaning the bin
number is converted into 'cm', depending on the
accuracy