Manual

BPF 70/4
Band-Pass Filter for the 450 MHz Band
DESCRIPTION
The BPF 70/4 is a 4-¼ λ resonator band-pass filter with inductive
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.
When installed in the output of a transmitter, the BPF 70/4 reduces
spurious signals.
The BPF 70/4 is adjustable over the range 406 - 470 MHz.
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 BNC 200000923
BPF 70/4 N 200000925
BPF 70/4 TNC 200001125
SPECIFICATIONS
ELECTRICAL
MODEL BPF 70/4
FILTER TYPE Band-pass filter
TUNING RANGE 406 - 470 MHz
MAX. INPUT POWER 50 W
INSERTION LOSS ≤ 1.5 dB
BW Max. 4 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) 230 (with connectors) x 104 x 33 mm
WEIGHT Approx. 690 g
TYPICAL RESPONSE CURVES
PROCOM A/S reserve the right to amend specifications
without prior notice.
29/04/13