Radar Target Generator - RTG1002 Edition Date: 19-Apr-18
Freq High and Freq Low : If Operating mode = Fixed target or Moving target, then these two parameters
are used to clip the measured frequency to one of these limits when it is outside the interval [Freq low ..Freq
high].
If Freq High is < 1401MHz then an L-band Low pass filter is used after the vector rotator before the
sampling of the digital delay line. This will avoid harmonics of the Doppler rotation from being sampled.
Therefore it is better to limit freq high to <1400MHz for L-band radars.
If Operating mode = white noise generation, then these two parameters will determine the bandwidth of the
noise spectrum, reducing the bandwidth will increase the power/MHz for the noise signal. The maximum
integrated power available at the generator output is around -10dBm.
2.2.1.2. RTG parameters
Antenna TX gain [dBi] , Attenuator A [dB] , Antenna Rx gain [dBi] , Attenuator B [dB]:
These parameters can be entered versus frequency. Cable loss can be compensated for every frequency,
since RTG1002 will perform a frequency measurement on the received pulse. In order to verify the correct
use of the tables for compensation of the cable loss it is possible to display the Rx power and the Rx antenna
power
1. CALCULATE the maximum peak power received by the RTG antenna. Take the following
parameters into account radar Tx power and frequency , radar (Tx) antenna gain, distance of the
setup and the gain of RTG Rx antenna. You can use the didactical panel in the software to assist the
calculations.
2. CALCULATE the attenuation needed for Attenuator B in the setup to reduce calculated peak power
to +10dBm (trigger level possible +10dBm … -35dBm RTG1002 or +5dBm ..-40dBm for RTGX).
Enter the value and check the value for RTG Rx …. dBm.
3. Connect antenna, cables and attenuators to receive the pulses from the radar.
4. Create or load an equalize table for Attenuator B. This table will compensate variations in the cable
loss vs frequency. You can add cables, attenuators, power splitters or amplifiers,... one by one.
IE-UM-00601-005 RTG1002 User Manual.odt 16/48
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