Procom BRF 70-...-250 - Manual

BRF 70/...-250
Band-Reject Filters for the 450 MHz Band
DESCRIPTION
High power base station band-reject filters for the 380 – 470 MHz range.
The use of large ø250 mm cavities means a high Q,
resulting in a very narrow notch bandwidth.
The large dimensions also mean a high power rating.
Unloaded Q of a single cavity is approx. 8000.
High frequency stability on temperature and power.
19” mounting brackets are available as an option.
ORDERING DESIGNATIONS
TYPE PRODUCT NO.
BRF 70/1-250 200001235
BRF 70/2-250 200001600
BRF 70/3-250 200001668
SPECIFICATIONS
ELECTRICAL
MODEL BRF 70/1-250 BRF 70/2-250 BRF 70/3-250
FREQ. RANGE 380 - 470 MHz 380 - 470 MHz 380 - 470 MHz
MAX. INPUT
POWER
350 W @
0.5 dB IL
200 W @
1.0 dB IL
350 W @
1.0 dB IL
200 W @
2.0 dB IL
350 W @
1.5 dB IL
200 W @
3.0 dB IL
ATTENUATION See figure 1 See figure 2 See figure 3
1 dB NOTCH BANDWIDTH 1 ‰ of f
c 1 ‰ of f c 1 ‰ of f c
IMPEDANCE Nom. 50 Ω Nom. 50 Ω Nom. 50 Ω
SWR < 1.5 < 1.5 < 1.5
MECHANICAL
TEMP.
RANGE
RH 0-90%
non-condensing
–30° C →
+60° C
–30° C →
+60° C
–30° C →
+60° C
FREQ.
STABILITY
Approx. 1.5
ppm/° C
Approx. 1.5
ppm/° C
Approx. 1.5
ppm/° C
CONNECTORS N-female N-female N-female
DIMENSIONS ø250 x
400 mm
L:250 x W:500
x H:400 mm
L::250 x W:750
x H:400 mm
WEIGHT Approx.
2.8 kg
Approx.
5.2 kg
Approx.
9.6 kg
TYPICAL RESPONSE CURVES
Figure 1
TYPICAL RESPONSE CURVES
Figure 2
TYPICAL RESPONSE CURVES
Figure 3
PROCOM A/S reserve the right to amend specifications
without prior notice.
06/04/11