Rohde & Schwarz AREG100A, User Manual, Page: 57 / 321

Radar Echo Generation
R&S
®
AREG100A
57 User Manual 1178.7417.02 ─ 04
This option offers a fixed customer defined artificial object in a distance between
4.2 m and 299.2 m + air gap.
The desired distance (incl. air gap) must be specified during the ordering process
along with the desired air gap value. Users can change the airgap of the measure-
ment setup at any time. In this case, the simulated object range will change
accordingly, as the internal signal delay of the AREG will stay constant. If changing
the airgap, the airgap setting in the AREG configuration should be updated to
ensure correct calculation and display of distance, RCS and EIRP values.
Remote command:
[:SOURce<hw>]:AREGenerator:OBJect<ch>:RANGe?
on page 245
Attenuation
Defines the signal attenuation of a specific object, from the AREG RX waveguide input
to the TX waveguide ouptput.
Changing the attenuation allows to manipulate the radar cross section for a specific
radar object. The resulting radar cross section (RCS) of the respective object will be
calculated and displayed by the AREG.
Remote command:
[:SOURce<hw>]:AREGenerator:OBJect<ch>:ATTenuation
on page 244
Doppler Speed
Option: R&S AREG-K799.
This option allows to set a frequency offset between the received signals from the
radar sensor and the retransmitted echo signal. It introduces a radial velocity, which
affects all artificial objects together.
Note: The setting of individual radial velocities for each of the artificial objects is not
supported by this option.
Following values are possible:
● −
138.9 m/s to 138.9 m/s
● −
500 km/h to 500 km/h
● −
310.7 mph to 310.7 mph
For defining the units, see "Speed Unit" on page 60.
Remote command:
[:SOURce<hw>]:AREGenerator:OBJect<ch>:DOPPler
on page 245
RCS
Displays the calculated radar cross section (RCS) of an object. The radar cross section
depends on the range, the base attenuation and the individual object attenuation, as
well as on AREG antenna gain and the size of the airgap.
The RCS does not represent the physical size of an object. Instead, it is a virtual area
which, if multiplied by the power density of the radar signal at the location of the object,
results in the signal power which is reflected back to the radar sensor. Following RCS
values are examples for different objects at 77 GHz
●
Truck (RCS =20 dBsm)
●
Car (RCS = 5 dBsm)
●
Pedestrian (RCs =
−
4 dBsm)
GUI Elements