R&S®SMW-K78 Radar Echo Generation

To R&S®SMW200A Vector Signal Generator

Overview
Features & Benefits

Key Facts

Real time capability for echo generation
Frequency coverage up to 40 GHz with one single generator and analyzer
Excellent RF performance of R&S^®SMW200A signal generator and R&S^®FSW signal and spectrum analyzer

Brief Description

Specifications

General parameters
Number of available radar objects	up to 24 objects
Bandwidth	up to 160 MHz

Quick Links

Key Facts

Real time capability for echo generation
Frequency coverage up to 40 GHz with one single generator and analyzer
Excellent RF performance of R&S^®SMW200A signal generator and R&S^®FSW signal and spectrum analyzer
Baseband flexibility of R&S^®SMW200A (e.g. add interferers and noise)
No external PC necessary
Intuitive and easy to use graphical user interface

Brief Description

The R&S^®SMW-K78 radar echo generation option, in conjunction with the R&S^®SMW200A vector signal generator and the R&S^®FSW spectrum and signal analyzer, makes it possible to artificially generate radar signal echoes. These tests can be performed via a wired connection (conducted test) or via the air interface (over the air test), eliminating much of the need for time-consuming and costly field tests.

Specifications

General parameters
Number of available radar objects	one R&S^®SMW-K78 option one or two R&S^®SMW-B14 installed	path A: up to 6
	one R&S^®SMW-K78 option four R&S^®SMW-B14 installed	path A: up to 12
	two R&S^®SMW-K78 options two R&S^®SMW-B14 installed	path A: up to 6 path B: up to 6
	two R&S^®SMW-K78 options four R&S^®SMW-B14 installed	path A: up to 12 path B: up to 12
Bandwidth		up to 160 MHz
Test setups	radar under test (RUT) is directly connected to the R&S^®SMW200A (+ R&S^®FSW) via cable	conducted test
	RUT and R&S^®SMW200A (+ R&S^®FSW) are equipped with antennas and connected via air interface	over-the-air (OTA) test
Radar RX power setting	calculation of power received by RUT regarding two-way radar equation	radar equation
	power received by RUT is set manually	manual
Simulation setup
System latency calibration	R&S^®SMW-K78 measures the internal system (R&S^®FSW + R&S^®SMW200A) latency automatically (only available in transmit signal mode: external baseband via R&S^®FSW + R&S^®SMW-B10)	automatic
	user measures internal latency with external equipment (e.g. scope)	manual
Object configuration
Object type	arbitrary object types can run at the same time
	echo is not generated	off
	echo for objects with variable range and constant velocity > 0 m/s is generated	moving
	echo for objects with constant range and no velocity is generated	static
	echo for objects with constant range and constant velocity > 0 m/s is generated	static + moving
Parameters common to all object types
Object name		define 15-digit name
Range
Setting range	use radar range ambiguity to reduce min. range: off	2.1 km to 10 000 km
	use radar range ambiguity to reduce min. range: on	0.0001 km to 10 000 km
Setting resolution		0.1 m
RCS	power setting: radar equation
Model		Swerling 0
Setting range		–60 dBsm to +100 dBsm
Setting resolution		0.1 dBsm
Parameters for moving objects
Simulation mode	object moves back to start position with set velocity after reaching its end position	round trip
Object velocity
Setting range	the maximum Doppler shift of 190 kHz must not be exceeded	0.001 ms to v_max v_max = 750 m/s or (190 kHz / 2f ) × c, whichever is lower
Setting resolution		0.001 m/s
Parameters for static + moving objects
Object velocity
Setting range	the maximum Doppler shift of 190 kHz must not be exceeded	0.001 ms to v_max v_max = (190 kHz / 2f ) × c
Direction	object flies toward RUT	approaching
	object flies away from RUT	departing
Simulation quantization (moving)
Update delay increment	object velocity ≥ 75 m/s	500 ps
	object velocity < 75 m/s	50 ps
Update rate delay	depending on object velocity	max. 2 MHz
Update rate power	depending on object velocity	max. 10 kHz