R.V.R. Elettronica

STATIONS ACCESSORIES > COMBINERS > DOUBLE BRIDGE FM


FTDPDC2-AC

FTDPDC2-AC

Combiner 2 channels, double balanced bridge.

  • COMBINER 2 CHANNELS 
  • DOUBLE BALANCED BRIDGE 
  • FM BAND 87.5÷108 MHz 
  • BAND II 




The double balanced bridge system consist of two band-pass filter, two -3dB coupler and a absorber. One of both inputs has a narrow-band characteristic (complying with the pass-band functions of the band pass filters), while the remaining input features a broadband characteristic within the operating frequency range of -3dB couplers, both inputs exhibits a frequency independent load impedance to the RF source. 





TYPICAL SPECIFICATIONS 
ModelFTDPDC2-AC – Type DOUBLE BRIDGE
Impedance50 Ohm
Frequency Range87.5-108 MHz
VSWR ±150 KHz1.1:1 max
Insertion Lossat 0 f 0.3 dB Max (Narrow Band Input) 0.08 dB Max (Broad Band Input)
Return Loss ±150Khz≤ -26 dB
Isolation ± 2 MHz≥ 32 dB
No. of Input3 (2 Narrow Band + 1 Broad Band)
No. of Output1
ConnectorsNarrow Band Input 7/8” (Opt . 1+5/8”) Broad Band Input 1+5/8” Output 1+5/8”
Max Power4 KW Narrow Band 5 KW Broad Band
Working Temperature-20°C ÷ +50°C
ColourEnamel gray ral 7001
MaterialsAluminium, Brass, Copper, PTFE, Stainless Steel, Silvering (min 12µm thickness)



FEATURES 

  • Distortion – Free Transmission 
  • Double Balanced Bridge system with pass stop 
  • Frequency independent input impedance 
  • The frequency at the broadband input can be varied without retuning of the pass-band cavity filters. 
  • The broadband input can be used as spare input for expansion without requiring modification of the existing pass-band cavity filters 
  • If only narrow band input is being used, an extremely high coupling attenuation (directional coupler attenuation plus filter attenuation) can be achieved for very small frequency spacings. 
  • Low loss, high isolation 
  • Natural convection 
  • Option: Group delay equaliser 





Dimensions1300(Max size)×1300×480 mm (51.2(Max size)×51.2×18.9 inch) (H×L×W)
Net Weight≅130 Kg




ORDERING INFORMATION

  • FTDPDC2-AC
    Combiner 2 channels, double balanced bridge.