The RFS 8PXX270DAB is designed for global filtering applications associated with Digital Radio transmission. It is a 8-pole natural air-cooled filter incorporating two cross-couplings to meet all mask requirements.
FEATURES / BENEFITS
8 pole filters are preferred instead of 6 pole for High Power DAB transmitters because:
The 8 pole has excellent VSWR well beyond the fc ± 0.77MHz carriers
The ETSI EN 302 077 Case 1 requires an extra dB of mask attenuation for every dB of power over 1kW to provide an absolute level of protection to other VHF broadcasters and nearby Military frequencies.
Very compact for easy integration into equipment.
Very low insertion loss (lowest for this size).
Highest power rating for size/class.
Tunable over full VHF band (168.16 to 239.2 MHz).
Tunable to ETSI EN 300 401 Critical, and ETSI EN 302 077 Cases 1 to 4 Mask Applications,
Europe Channels 5A to 13F, China Channels 6A to 12D, Korea Channels 7A to 13C
-5 to 55°C degree ambient temperature operation.
8PXX270DAB Natural Air Cooled Filter Undergoing 8 kW Power Testing
Band III (VHF) DAB Bandpass Filter
8 Pole with 2 cross couplings - 270 mm ground plane spacing
Input / Output Connector
1-5/8" EIA Unflanged or Flanged Female (Standard) or 3-1/8" EIA Unflanged or Flanged Female (Optional)
563 x 728 x 1278.5 (22.2 x 28.7 x 50.3)
Natural Air Cooled
Out-of-Band Emissions Mask
ETSI EN 300 401 Critical & ETSI EN 302 077 Case 1
ETSI EN 302 077 Case 4
Input Power Rating
Insertion Loss at Fc
<1.0 @ fc ± 0.77MHz >18 @ fc ± 0.97MHz >54 @ fc ± 1.75MHz >54 @ fc ± 2.2MHz >60 @ fc ± 3.0MHz
<1.25 @ fc ± 0.77MHz >21 @ fc ± 0.97MHz >54 @ fc ± 1.75MHz >65 @ fc ± 2.2MHz >70 @ fc ± 3.0MHz