Radar Training System, LabVolt Series
© Festo Didactic
30
Radar Jamming Pod Trainer
581949 (9608-10)
The Radar Jamming Pod Trainer is a Self-Screening Jammer (SSJ)
target in a compact enclosure. It is designed to be placed on the
Target Positioning System, Model 9607, to electronically attack
the Radar Training System by masking the target echo signal
with noise or causing either range or angle deception. The Radar
Jamming Pod Trainer mainly consists of an RF signal source, a
variable attenuator, transmitting and receiving horn antennas, a
signal repeater, an amplitude modulator, and a remote
controller.
The RF signal source is a Voltage-Controlled Oscillator (VCO) whose frequency range is approximately twice that
of the Radar Training System. The VCO frequency can be adjusted to perform radar jamming using spot noise.
The VCO can also be modulated in frequency, either internally or externally, to produce barrage noise jamming.
The variable attenuator decreases the VCO signal level before it is sent to the transmitting horn antenna. This
allows the amount of noise introduced in the victim radar (i.e., the Radar) to be adjusted. The maximum
transmitted power is low, thereby providing safe operation in a laboratory environment.
The receiving horn antenna intercepts the pulse signal transmitted by the Radar. The repeater, which consists of
an amplifier and a programmable delay line, amplifies and delays the intercepted signal. By transmitting this
signal back to the radar and gradually increasing the delay, the range gate in the radar tracking system can be
captured and pulled away from the target echo, thereby producing range deception. This technique is usually
referred to as Range Gate Pull Off (RGPO).
The amplitude modulator consists of an electronic RF switch which can be controlled either internally or
externally. It is used to modulate the amplitude of the VCO output signal or repeated signal (on-off modulation).
The amplitude modulator allows implementation of AM noise jamming and asynchronous inverse gain jamming.
It also allows blinking jamming when a second transmitting horn antenna is connected to an auxiliary RF output
on the Radar Jamming Pod Trainer. These three jamming techniques are used to cause angle deception in the
radar tracking system.
The remote controller is used to operate the Radar Jamming Pod Trainer. Communication between the remote
controller and the Radar Jamming Pod Trainer is through an infra-red link. Buttons and an LCD display on the
remote controller provide access to the various functions of the Radar Jamming Pod Trainer.
The Radar Jamming Pod Trainer can be tilted 90° to perform cross-polarization jamming, another technique
used to cause angle deception in the radar tracking system. It can also be used with accessories to demonstrate
other jamming techniques such as sidelobe jamming, formation jamming, and jammer illuminated chaff (JAFF),
as well as the fundamentals of stealth technology.
The Radar Jamming Pod Trainer operates from unregulated DC voltages. A cable allows the Radar Jamming Pod
Trainer to be connected to a standard unregulated DC power bus (available on the Power Supply / Antenna
Motor Driver, Model 9601, and the Power Supply, Model 9609).
Specifications
Parameter
Value
Frequency Range
8 to 12 GHz
Output Power
-30 to +10 dBm, adjustable in 1 dB steps
Internal Frequency Modulation
Waveform
Selectable, 980-Hz synthesized triangular wave or 30-kbps pseudo-random bit sequence
Deviation
Selectable, 50 MHz, 1, 2, 3, and 4 GHz
Frequency Modulation Input
