Procom BPF 70-4-hx User Manual
Bpf 70/4-hx

BPF 70/4-HX
Band-Pass Filter for the 450 MHz Band
DESCRIPTION
The BPF 70/4-HX 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 70/4-HX-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 70/4-HX reduces
spurious signals.
The BPF 70/4-HX is adjustable over the range 406 - 470 MHz.
Very compact due to use of helical resonators.
Careful choice of materials ensures reliable functioning over a wide
temperature range.
Extruded aluminium sections, steel racks and coax cables and
connectors with teflon insulation ensure good mechanical strength.
The filter is black vinyl coated to prevent corrosion.
ORDERING DESIGNATIONS
TYPE
PRODUCT NO.
BPF 70/4-HX
200000908
SPECIFICATIONS
ELECTRICAL
MODEL
BPF 70/4-HX
FILTER TYPE
Band-pass filter
TUNING RANGE
406 - 470 MHz
MAX. INPUT POWER
35 W
INSERTION LOSS
≤ 1.5 dB typ. 1.2 dB
0.5 dB BW MHz
Min. 3 MHz
ATTENUATION AROUND PASS-BAND
See curves
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)
115 x 104 x 33 mm
WEIGHT
Approx. 430 g
TYPICAL RESPONSE CURVES
PROCOM A/S reserve the right to amend specifications
without prior notice.
03/12/12