User guide

DPF 900/6-...
6-Cavity Duplexer for the 900 MHz Band
DESCRIPTION
The DPF 900/6-... is a 6-cavity duplex filter for duplex radiotelephones
operating in the 900 MHz band.
The DPF 900/6-... can be tuned within the 780 - 960 MHz band with a
nominal duplex separation of 45 MHz. The duplexer can, however, be
especially delivered to work with duplex separations down to 10-15 MHz.
The DPF 900/6-... is primarily intended for equipment which the TX and
RX operate on single frequencies, but it 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 uses full-length ¼ λ cavities in a compact, extruded aluminium
housing.
The chassis is made of passivated steel and teflon insulation has been
applied in the rigid coaxial cables and in the connectors.
The filter is coated with black vinyl to prevent corrosion.
ORDERING DESIGNATIONS
TYPE PRODUCT NO. DUPLEX SPACING
DPF 900/6 200000460 45 MHz
DPF 900/6-10 200002256 10 - 15 MHz
SPECIFICATIONS
ELECTRICAL
MODEL DPF 900/6-...
TX/RX FREQUENCY 780 - 960 MHz
MAX. INPUT POWER 50 W
INSERTION LOSS TX-ANT
AND ANT-RX
(at 45 MHz duplex spacing)
Single-channel tuned:
Multi-channel tuned, 5 MHz BW:
10 - 15 MHz
≤ 1.5 dB
≤ 1.5 dB
45 MHz
≤ 1.0 dB
≤ 1.0 dB
TX NOISE SUPPRESSION
ON RX-FREQUENCY
Single-channel tuned:
Multi-channel tuned, 5 MHz BW:
> 85 dB
> 60 dB
> 85 dB
> 65 dB
RX ISOLATION ON TX-FREQUENCY
Single-channel tuned:
Multi-channel tuned, 5 MHz BW:
> 85 dB
> 60 dB
> 85 dB
> 65 dB
DUPLEX SPACING 10 - 15 or 45 MHz (norm.)
IMPEDANCE Nom. 50 Ω
SWR ≤ 1.5
MECHANICAL
FREQ. STABILITY Approx. 4.5 ppm/° C
CONNECTORS BNC-female
DIMENSIONS (L x W x H) 158 x 154 x 33 mm / 6.2 x 6.1 x 1.3 in
WEIGHT Approx. 0.85 kg / 1.9 lb
ENVIRONMENTAL
TEMP. RANGE –30° C → +60° C