Procom BPF 900-3 - Manual

BPF 900/3
Band-Pass Filter for the 900 MHz Band
DESCRIPTION
The BPF 900/3 is a 3-cavity band-pass filter using full-length quarter-
wave resonators.
This filter can be used as a preselector to protect a receiver against
interference from transmissions out of the passband, or it can be used
to reduce spurious output from a transmitter with up to 50 W output
power.
The filter can be tuned within the entire 820 - 960 MHz band. Careful
design and choice of materials ensure reliable operation over a wide
temperature range.
The housing is made of extruded aluminium, the chassis of brass, and
teflon insulation has been used in the coaxial cables and in the
connectors.
The filter is black vinyl coated to prevent corrosion.
ORDERING DESIGNATIONS
TYPE PRODUCT NO.
BPF 900/3 200000935
SPECIFICATIONS
ELECTRICAL
MODEL BPF 900/3
FILTER TYPE Band-pass filter
TUNING RANGE 820 - 960 MHz
MAX. INPUT POWER 50 W
INSERTION LOSS ≤ 1.2 dB
ATTENUATION AROUND PASSBAND See curves
ATTENUATION 0-790 MHz > 45 dB, see curves
IMPEDANCE Nom. 50 Ω
SWR ≤ 1.5
MECHANICAL
TEMP. RANGE –30° C → +60° C
FREQ. STABILITY Approx. 10 ppm/° C
CONNECTORS N-female
DIMENSIONS (L x W x H) 153 x 77 x 33 mm
WEIGHT Approx. 350 g
TYPICAL RESPONSE CURVES