Procom BRBP 4-4 - Manual

BPBR 4/4 / BRBP 4/4
Band-Pass - Band-Reject Filters for the 80 MHz Band
DESCRIPTION
The BPBR 4/4… and the BRBP 4/4… are 4-cavity pass-reject filters,
which pass one frequency or frequency band and reject another in
immediate vicinity of the pass frequency.
The filters are delivered in two basic models: The BPBR-types have the
reject range on the high side of the pass frequency and the BRBP-types
have the reject range situated on the low side of the pass frequency.
These filter types can be used to protect a receiver against interference
from a nearby transmitter. The filters are tuned to reject the interfering
signal. Pass-reject-type filters are applied when the spacing between the
utility signal and the interfering signal is so small, that the slope
steepness of normal band-pass filters or notch filters are not sufficient to
provide adequate rejection.
The filters are primarily intended to pass and reject two single
frequencies, but the filters can also be tuned to pass and reject several
single frequencies or to having a certain pass and reject port bandwidth.
In these cases factory-tuning is recommended.
The standard BPBR-filters can be tuned within the complete 4 m-band
with 2 to 16 MHz spacing between the operating frequencies. Insertion
loss is below 1.3 dB at spacings between 3 and 16 MHz. At the
narrowest spacing of 2 MHz, insertion loss is kept under 2.0 dB.
The filters have very small dimensions owing to the use of high-Q helical
resonators with discrete-component interconnections.
The housing is made of extruded aluminium, the chassis of passivated
steel, and the connectors are provided with teflon insulation. The filters
are black vinyl coated to prevent corrosion.
Careful design and choice of materials ensure reliable operation over a
wide temperature range.
ORDERING DESIGNATIONS
TYPE PRODUCT NO. PASS RANGE REJECT RANGE
BPBR 4/4 200001367 Low High
BRBP 4/4 200000149 High Low
SPECIFICATIONS
ELECTRICAL
MODEL BPBR 4/4 / BRBP 4/4
FILTER TYPE Band-pass / band-reject filters
TUNING RANGE 66 - 88 MHz (Option: 88 - 104 MHz)
MAX. INPUT POWER @ 3-16 MHz spacing : 50 W
@ ≤3 MHz spacing : 35 W
INSERTION LOSS
Single-channel tuned
at 2 MHz spacing
at 3 MHz spacing
at 4 MHz spacing
at 16 MHz spacing
Multi-channel tuned
closest spacing 2 MHz
closest spacing 3 MHz
closest spacing 4 MHz
closest spacing 16 MHz
≤ 2.0 dB
≤ 1.3 dB
≤ 1.0 dB
≤ 0.6 dB
≤ 1.5 dB
≤ 1.0 dB
≤ 0.8 dB
≤ 0.6 dB
REJECT ATTENUATION
Single-channel tuned
Multi-channel tuned 2 MHz BW
> 90 dB
> 60 dB
PASS/REJECT SPACING 2-16 MHz
IMPEDANCE Nom. 50 Ω
SWR ≤ 1.5
MECHANICAL
TEMP. RANGE –30° C → +60° C
CONNECTORS BNC-female
DIMENSIONS (L x W x H) 152 x 104 x 33 mm
WEIGHT Approx 430 g