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8PXXW
Band IV/V (UHF) Waveguide 40kW bandpass filter

Rev : 01 | Rev date : 30 Aug 2021

The RFS 8PXXW is designed for global filtering applications associated with DTV television transmission. It is an 8-pole air cooled filter inC3.0corporating two cross-couplings to meet all mask requirements. The 8-pole filter allows for FCC tightening of emission mask in ATSC3.

FEATURES / BENEFITS

  • Designed for vertical mounting to minimize footprint
  • Adjustable 6 to 8MHz bandwidth for global applications
  • Designed for high peak voltage DTV signals
  • Advanced design and manufacturing techniques for optimum performance
  • Customised out-of-band emissions filtering
  • No field tuning required
  • Meets FCC mask plus provides additional protection to adjacent channels being broadcast in the same region


8PXXW UHF Filter

Technical features

General Specifications

Product LineFilters
Product TypeBand IV/V (UHF) TV Bandpass Filter
Model8PXXW
Filter type8 pole with 2 cross couplings

Mechanical Specifications

Input / Output Connector3-1/8" EIA Flanged/Unflanged Female (Standard) or 4-1/16" EIA Flanged Female, 4-7/8" IEC Flanged Female (Optional)
Dimension-WxDxH mm (in)612 x 540 x 1477 (24.1 x 21.3 x 51.2) varies with channel
Weight kg (lb)100 (220) weight varies by channel

Electrical Specifications

ImpedanceΩ50
Out-of-Band Emissions MaskDVB-T ETSI criticalDVB-T ETSI criticalISDB-T criticalATSC1.0/ATSC3.0
Channel Bandwidths MHz8668
Input Power RatingkW40.0 @ 474MHz
34.0 @ 586MHz
28.0 @ 698MHz
27.0 @ 473MHz
22.5 @ 587MHz
18.0 @ 701MHz
27.0 @ 473MHz
22.5 @ 587MHz
18.0 @ 701MHz
30/30 @ 473MHz
25/25 @ 605MHz
20/20 @ 701MHz
Insertion Loss at fcdB<0.14 @ 474MHz
<0.17 @ 586MHz
<0.20 @ 698MHz
<0.18 @ 473MHz
<0.22 @ 587MHz
<0.24 @ 701MHz
<0.18 @ 473MHz
<0.22 @ 587MHz
<0.24 @ 701MHz
<0.16 @ 473MHz
<0.20 @ 605MHz
<0.24 @ 701MHz
Attenuation dB<1.15 at Fc ± 3.8 MHz
>15.0 at Fc ± 4.2 MHz
>27.0 at Fc ± 6.0 MHz
>52.0 at Fc ± 12.0 MHz
<1.55 at Fc ± 2.85 MHz
>15.0 at Fc ± 3.15 MHz
>27.0 at Fc ± 4.5 MHz
>52.0 at Fc ± 9.0 MHz
<1.2 at Fc ± 2.79 MHz
>14.0 at Fc ± 3.15 MHz
>31.0 at Fc ± 4.5 MHz
>61.0 at Fc ± 9.0 MHz
<0.5 at Fc ± 2.69 MHz
<1.9 at Fc ± 2.915 MHz
>20 at Fc ± 3.5 MHz MHz
>20 at Fc ± 4 MHz
>40 at Fc ± 6 MHz
>65 at Fc ± 9 MHz
Note 1
VSWR average across carriers<1.1<1.1<1.11<1.1
Return Loss Average Across Carriers dB26.426.425.726.4
Group Delay Variation ns<590 at Fc ± 3.8 MHz<790 at Fc ± 2.85 MHz<750 at Fc ± 2.79 MHz<290 at Fc ± 2.69 MHz
Maximum Operating Temperature°C (°F)80 (176)
Ambient Temperature Range°C (°F)-5 to 55 (23 to 131 )
Maximum Temperature Rise°C (°F)40 (104)
Freq Drift - Tx OperationkHz/°C(°F)<1 (0.6)
Freq Drift - Ambient TemperaturekHz/°C(°F)1 (0.6)


8PXXW Typical Response


8PXXW Filter Views

Notes

Note:

1. TX intermod shoulders 37 dB

2. Filter dimensions and weight varies by channel.