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BPF 2/...-125

Band Pass FiltersBPF 2/...-125

Band-Pass Filters for the 150 MHz Band

Description

  • High power base station band-pass filters for the 140 - 175 MHz range.
  • The use of large ø125 mm cavities means a high Q,
    resulting in a very narrow passband.
  • The large dimensions also mean a high power rating.
  • Unloaded Q of a single cavity is approx. 4500.
  • High frequency stability on temperature and power.
  • Mounted on 19” brackets.**

Specifications

Electrical
Model BPF 2/1-125 BPF 2/2-125 BPF 2/3-125
Frequency 140 - 175 MHz
Max. Input Power 300 W @ 0.5 dB IL
125 W @ 2.0 dB IL		 300 W @ 1.0 dB IL
125 W @ 4.0 dB IL		 300 W @ 1.5 dB IL
125 W @ 6.0 dB IL
Insertion Loss Adjustable 0.4 - 2.0 dB Adjustable 0.8 - 4.0 dB Adjustable 1.2 - 6.0 dB
Impedance 50 Ω
Attenuation See figure 1 See figure 2 See figure 3
VSWR < 1.5:1
Mechanical
Connection(s) N(f)
Max. RPM 200 (on tuning rod)
Dimensions ø125 x 600 mm /
ø4.92 x 23.62 in.		 125 x 285 x 600 mm /
4.92 x 11.22 x 23.62 in.		 125 x 425 x 600 mm /
4.92 x 16.73 x 23.62 in.
Weight Approx. 1.9 kg / 4.19 lb. Approx. 4 kg / 8.82 lb. Approx. 6.5 kg / 14.33 lb.
Environmental
Operating temperature range -30 °C to +60 °C
Frequency Stability Approx. 1.5 ppm / °C

Ordering Designations

Model Product No.
BPF 2/1-125 200000956
BPF 2/2-125 200000986
BPF 2/3-125 200000961

Typical Response Curves

Figure 1

BPF 2!1 125 insertionkurve GB

Figure 2

BPF 2!2 125 insertionkurve GB

Figure 3

BPF 2!3 125 insertionkurve GB

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