Manual

BPF 2/4-...
Band-Pass Filter for the 160 MHz Band
DESCRIPTION
The BPF 2/4-... is a 4-helical resonator band-pass filter with aperture
coupling between the resonators.
This filter can be used as a preselector to protect a receiver from
interference from transmitters outside the band-pass limits.
The BPF 2/4-C (C = cable) can be installed directly into the
PRO-AR4G-N, PRO-AR8G-N and PRO-AR16G-N receiver multicouplers as
a preselector.
When installed in the output of a transmitter, the BPF 2/4 reduces
spurious signals.
The BPF 2/4-... is adjustable over the range 144 - 175 MHz.
Very compact due to use of helical resonators.
Careful choice of materials ensures reliable performance over a wide
temperature range.
Extruded aluminium sections, steel racks and coaxial cables and
connectors with teflon insulation ensure good mechanical strength.
The filter is black vinyl coated to prevent corrosion.
ORDERING DESIGNATIONS
TYPE PRODUCT NO. PASS BAND WIDTH
BPF 2/4-2 200000848 2 MHz
BPF 2/4-4 200000870 4 MHz
SPECIFICATIONS
ELECTRICAL
MODEL BPF 2/4-...
FILTER TYPE Band-pass filter
TUNING RANGE 144 - 175 MHz
MAX. INPUT POWER 35 W
INSERTION LOSS ≤ 1.5 dB typ. 1.2 dB
ATTENUATION AROUND PASS-BAND Can be ordered in
BW: 2 MHz BW: 4 MHz
OUT OF BAND ATTENUATION See curves
IMPEDANCE Nom. 50 Ω
SWR ≤ 1.5
MECHANICAL
TEMP. RANGE –30° C → +60° C
CONNECTORS BNC-female (others on request)
DIMENSIONS (L x W x H) 165 x 104 x 33 mm
WEIGHT Approx. 500 g
TYPICAL RESPONSE CURVES
PROCOM A/S reserve the right to amend specifications
without prior notice.
02/01/12