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DPF 2/4...

4-Cavity Duplexer for the 160 MHz Band

DESCRIPTION

The DPF 2/4… is a 4-cavity duplex filter for duplex radiotelephones.

This duplexer is delivered in a low band version type DPF 2/4 L, tunable

within 138 - 156 MHz and a high band version type DPF 2/4 H, tunable

within 152 - 175 MHz. These models are again delivered in 3 submodels,

each dedicated to work with a certain duplex spacing. See “Ordering

information” below.

The DPF 2/4… models are primarily intended for equipment, where the

TX and RX operate on single frequencies, but they can also, however

with slightly reduced data, be used where the TX and RX operate on

several channels, i.e. within a certain port bandwidth. In the last case,

factory-tuning is recommended.

The filter has very small physical dimensions owing to the use of high-Q,

temperature compensated helical resonators.

The housing is made of extruded aluminium, the chassis of passivated

steel, and teflon insulation has been applied in the rigid coaxial cables

and in the connectors.

The filter is black vinyl-coated to prevent corrosion.

ORDERING DESIGNATIONS

TYPE PRODUCT NO. TUNING RANGE

(MHZ)

DUPLEX SPACING

(MHZ)

DPF 2/4 L-4/6 200000067 138 - 156 4 - 6

DPF 2/4 L-6/8 200000068 6 - 8

DPF 2/4 L-8/10 200000069 8 - 10

DPF 2/4 H-4/6 200000058 152 - 175 4 - 6

DPF 2/4 H-6/8 200000060 6 - 8

DPF 2/4 H-8/10 200000063 8 - 10

SPECIFICATIONS

ELECTRICAL

MODEL DPF 2/4...

TX/RX FREQUENCY DPF 2/4 L : 138 - 156 MHz

DPF 2/4 H : 152 - 175 MHz

MAX. INPUT POWER 50 W

INSERTION LOSS

TX-ANT AND ANT-RX

(at 4.5 MHz duplex spacing)

Single-channel tuned

Multi-channel tuned, 1.5 MHz BW

≤ 1.0 dB (typ. 0.8 dB)

≤ 1.2 dB (typ. 1.0 dB)

TX NOISE SUPPRESSION

ON RX-FREQUENCY

Single-channel tuned

Multi-channel tuned, 1.5 MHz BW

> 60 dB

> 40 dB

RX ISOLATION

ON TX-FREQUENCY

Single-channel tuned

Multi-channel tuned, 1 MHz BW

> 60 dB

> 40 dB

DUPLEX SPACING 4 - 10 MHz (adjustable)

IMPEDANCE Nom. 50 Ω

SWR ≤ 1.5

MECHANICAL

TEMP. RANGE –30° C → +60° C

FREQ. STABILITY Approx. 5 ppm/° C

CONNECTORS UHF-female

DIMENSIONS (L x W x H) 211 x 104 x 33 mm

WEIGHT Approx. 670 g

ORDERING INFORMATION

When ordering, please use the table above to select the appropriate

ordering designation for the desired filter type. If duplex TX and RX

frequencies are stated when ordering, the duplexers are delivered factory

adjusted. If TX and RX frequencies are not stated, the filters are delivered

nonadjusted.

PLEASE NOTE

Special configurations of this filter type may be quoted on request. For

instance, the filter can be delivered with other connector types or with flying

leads (RG 316 coaxial cable) terminated with connectors or for soldering-

connection.

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DPF 2/4 1
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Summary of Contents

Page 1 - DPF 2/4

DPF 2/4...4-Cavity Duplexer for the 160 MHz BandDESCRIPTIONThe DPF 2/4… is a 4-cavity duplex filter for duplex radiotelephones.This duplexer is delive

Page 2 - 19/02/13

TYPICAL RESPONSE CURVES @ 4.5 MHz DUPLEX SPACINGTYPICAL RESPONSE CURVES @ 9 MHz DUPLEX SPACINGPROCOM A/S reserve the right to amend specificationswith

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