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RFbeam Microwave GmbH | Schuppisstrasse 7 | CH-9016 St. Gallen | www.rfbeam.ch | K-LD2 | data sheet

09/2018 - Revision B | Page 13/20

Adjust hold time and sensitivity

The K-LD2 uses arrays with a width of 10 elements

to set the range of hold time and sensitivity (see pa-

rameters A00…A09 for hold time and parameters

A10…A19 for sensitivity). The used index of the arrays

is defined using the parameters D00 and D01 or  by

the analogue inputs, if these are enabled with the pa-

rameters S0B and S0C.

Serial Interface

The K-LD2 features a serial interface with a command

set to configure the sensor and read-out measured

data. The interface is an ASCII based 3.3V asynchro-

nous UART with the following settings:

– Baud rate 38400 bps

– 8 data bits

– 1 stop bit

– no parity, no handshake

This interface and the complete command set is sup-

ported by the K-LD2 Control Panel, which is included

in the K-LD2-EVAL evaluation kit.

analogue hold time input

hold time setting (D00)

analogue sensitivity input

sensitivity setting (D01)

S0C

hold time array

(A00…A09)

Detection

Algorithm

sensitivity array

(A10…A19)

S0B

0…9

hold time

sensitivity

0…9

array

value

index

index

array

value

Figure 13: Hold time and sensitivity block diagram

It is possible to connect the K-LD2 directly

with an USB to UART cable with +3.3V TTL

level signals. For example the TTL-232R-

3V3 from FTDI can directly be connected to

the pins 1 to 6 of the K-LD2 to power it and

get access to the serial interface over a stan-

dard terminal program.

In the factory settings these arrays are filled with de-

fault values that will work for the most applications.

(See Table Hold time array default values and Table

Sensitivity array default values) It is possible to overwri-

te these arrays to generate your own sensitivity or hold

time curves.