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8PPXX272E Series
Band IV/V (UHF) PeakPower+TM 30kW bandpass filter

Rev : 03 | Rev date : 16 Jul 2021
The RFS 8PPXX272E is designed for global filtering applications associated with DTV television transmission. It is an 8-pole fan cooled filter incorporating dual cross couplings. The 8-pole filter allows for FCC tightening of emission mask for ATSC 3.0 in the future.

FEATURES / BENEFITS

  • Meet FCC mask requirements plus extra protection for adjacent channels.
  • Both fan-cooled and liquid-cooled filters have equal power handling capability.
  • Very compact for easy integration into equipment.
  • Lowest insertion loss and highest power rating for its size/class.
  • Tunable over UHF band (470 – 620MHz).
  • Adjustable bandwidth, available for 6  and 8 MHz channels for global applications.
  • External coupling adjustment simplifies tuning.
  • All data presented upon field measured results.
  • 115V (50/60Hz) and 230V (50/60Hz) fan cooling kits available in place of liquid cooling.


8PPXX272E Frame Filter

Technical features

General Specifications

Product LineFilters
Product TypeBand IV/V (UHF) TV Bandpass Filter
Model8PPXX272E
Filter type8 Pole with 2 cross couplings - 270 mm ground plane spacing - Fan Cooled
Input / Output Connector3-1/8" to 6-1/8" Unflanged and Flanged Female Connectors Are Available

Electrical Specifications

ImpedanceΩ50

Mechanical Specifications

Dimension-WxDxH mm (in)1391 x 640 x 630 (54.8 x 25.2 x 24.8) Max - Frame Included
Weight kg (lb)182 (401)

Specifications

Out-of-Band Emissions MaskDVB-T ETSI criticalDVB-T ETSI criticalISDB-T criticalATSC 1.0/ATSC 3.0
Note 1
Channel Bandwidths MHz8666
Frequency RangeMHz470-620
Input Power RatingkW26.5 @ 474 MHz
27.8 @ 618 MHz		24 @ 473MHz
22.7 @ 617MHz		24 @ 473MHz
22.7 @ 617MHz		30/24 @ 473MHz
30/24.6 @ 617MHz
Note 2
Insertion Loss at fcdB<0.24 @ 474 MHz
<0.25 @ 618 MHz		<0.33 @ 473 MHz
<0.34 @ 617 MHz		<0.33 @ 473 MHz
<0.34 @ 617 MHz		<0.31 @ 473 MHz
<0.32 @ 617 MHz
AttenuationdB<1.2 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		<1.6 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		<1.3 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		<0.7 at Fc ± 2.69 MHz <0.9 at Fc ± 2.915 MHz
>20 at Fc ± 3.5 MHz
>20 at Fc ± 4 MHz
>40 at Fc ± 6 MHz
>65 at Fc ± 9 MHz
Note 3
VSWR average across carriers≤1.1
Return Loss Average Across CarriersdB≥26.4
Group Delay Variationns<590 at Fc ± 3.8 MHz<690 at Fc ± 2.85 MHz<590 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) Note 2
Maximum Temperature Rise°C (°F)Δ40 (Δ72)
Freq Drift - Tx OperationkHz/°C(°F)<2 (1.2)
Freq Drift - Ambient TemperaturekHz/°C(°F)<2 (1.2)


8PPXX272E Plan View


8PPXX272E Side and Iso Views


Graph 1 - 8PPXX272E Filter Typical Response


Graph 2 - Ambient (Fan Cooled) Temperature [°C(°F)]

Notes

  • Note 1. Other out-of-band emission masks upon request.
  • Note 2. >25kW input power for ATSC 1.0 only. Refer to Graph 2 for required cooling conditions.
  • Note 3. TX intermod shoulders 37 dB.