Duplex FiltersDPF 4/...-125

Duplex Filters for the 85 MHz Band

Description

  • High power base station duplex filters for the 66 – 88 MHz range.
  • The use of large ø125 mm cavities means a high Q, resulting in a
    very small duplex spacing.
  • The large dimensions also mean a high power rating.
  • High frequency stability on temperature and power.
  • Mounting brackets for 19” mounting included.
  • Please specify the frequencies for Tx and Rx when ordering.

Specifications

Electrical
Model DPF 4/22-125 DPF 4/33-125
Frequency 66 - 88 MHz
Max. Input Power 250 W
Min. Duplex Spacing 0.25 MHz
Insertion Loss < 1.0 dB < 1.5 dB
Impedance 50 Ω
Attenuation > 40 dB > 60 dB
VSWR ≤ 1.5:1
Mechanical
Connection(s) N(f)
Dimensions 260 x 483 x 1400 (1500) mm /
10.24 x 19.02 x 55.11 (59.05) in.
260 x 483 x 1400 (1500) mm /
10.24 x 19.02 x 55.11 (59.05) in.
Weight Approx. 19 kg / 41.89 lb. Approx. 28.4 kg / 62.61 lb.
Environmental
Operating temperature range -30 °C to +60 °C
Frequency Stability Approx. 0.8 ppm / °C

Diagram and Mounting

TYPICAL RESPONSE CURVES @ 1 MHz DUPLEX SPACING

TYPICAL RESPONSE CURVES @ 1 MHz DUPLEX SPACING

Ordering Designations

Model Product No.
DPF 4/22-125 200001581
DPF 4/33-125 200001582