Druckschrift 99810560, Combiners and Filters for FM ... - Kathrein

Band-pass Filter
210 ... 230 MHz, DAB, 1 kW
The band-pass filter can be used
– as output filter of DAB-transmitters
– for appliances where high Q is requested to achiveve
low insertion loss in addtion with high selectivity close
to the pass-band
– to achieve filter-mask criteria conform to standard
ETS-300401 – non critical mask
– as a component in the construction of DAB-combiners
Design and Construction
The band-pass filter is made of six inductively coupled
resonators. The operating frequency, the coupling
between the resonators and also the input and output
couplings are adjustable.
The band-pass filter is convection-cooled, no ventilators
are required.
The band-pass filter must be tuned to the operating
channel. Tuning may be done at our factory or can be
carried out on site.
Clear tuning instructions and also any special tools
necessary are part of the delivery extent.
792 776 DAB Band-pass filter, 1 kW
Technical Data
Type No. 792 776
Frequency range
Insertion loss (1
Selectivity
VSWR
Impedance
Input power
210 ... 230 MHz
< 0.9 dB (at f 0 typ. 0.7 dB)
< 1.1 dB (at edge frequencies)
> 40 dB (at f 0 ± 1.768 MHz)
> 60 dB (at f 0 ± 5 MHz)
< 1.2 (at pass band)
50 Ω
max. 1 kW
Temperature range –20 °C ... +50 °C
Connectors
7-16 female
Material
Aluminium (outer conductor)
Brass, silver-plated (inner conductor)
Colour
RAL 7032 (grey)
Weight
45 kg
Dimensions (l x w x h)
610 mm x 400 mm x 550 mm
Packing size (l x w x h)
800 mm x 600 mm x 1100 mm
Attenuation/dB
0
20
40
60
80
100
–5.0 –4.0 –3.0 –2.0 –1.0 +1.0 +2.0 +3.0 +4.0 +5.0
f 0 /MHz
Frequency/MHz
(1 Insertion loss value apply to standard tuning with pass-band width
of 1.54 kHz.
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