MIL DAB/T-DMB ITS - DAB/T-DMB INTERMODULATION TEST SYSTEM

 

MIL DAB/T-DMB ITS is a multi signal generator (up to 6 carriers), concept to perform IMD testing to DAB/ T-DMB receiver or amplifiers on VHF or SHF band.
The equipment is based on 6 independent signal generators controlled by an industrial PC and an active power combiner, allowing to build an RF pattern (1 to 6 channels), as shown in the pitcture at right. The carriers amplitude can be separately adjusted by the internal programmable attenuator (0 to -120 dB), handled by the keyboard or the external mouse.

Each channel can modulated by an E.T.I. file chargeable by USB or the internal HD. The internal modulator allows CW or OFDM/ D-QPSK.
The power combiner, includes separate switched amplifiers and output connectors for each frequency band (VHF - SHF).
This features makes the systems ideal for broadcasters, receiver manufaturers, center of research and scientific applications
.

old pc2

 

General Specification

Frequency Range VHF Band 1 : 87.5 to 174 MHz
VHF Band 2 : 174 MHz to 250 MHz
L Band (SHF) : 1.452 to 1.492 GHz
Frequency Resolution VHF Band I and II : 1 KHz
L Band (SHF) : 100 KHz
Frequency accuracy +/- 1 ppm
Number of channels 1 to 6 channel (VHF)
1 to 6 channel (SHF)
Cross band use is allowed (not 6+6 carriers)
CW Vs. Digital modulation is allowed 
Impedance (Out) 50 Ohm unbalanced, 2 X N precision female connectors (VHF and L Band - separate outputs)
RF Max. Amplitude Level VHF : > +10 dBm with amplifier control switched on    
                      (attenuator at 0 dB)
VHF: > -10 dBm  
with amplifier control switched off    
                      (attenuator at 0 dB)

L Band : > +5 dBm with amplifier control switched on    
                      (attenuator at 0 dB)
L Band : > -10 dBm  with amplifier control switched off
                      (attenuator at 0 dB)
Amplitude control level
(programmable attenuator)
0 to 120 dB with 0.5 dB resolution
Amplitude control accuracy   +/- 1 dB
Modulation
CW or OFDM/D-QSK
Standard compatibility  EN 3000 401, ETS 300 799, DAB mode I, II, III, IV
Prime Power 230 VAC, 50 Hz, 1 KW
Type of power supply linear with redundant configuration
Prime power connector VDE standard socket 
Case Cabinet for 6 U, 19" st rack mount
Operative temperature 5 to 40°C 
Storage temperature 0 to 40°C