FB281 FARADAY [Faraday Technology], FB281 Datasheet
FB281
Manufacturer Part Number
FB281
Description
SATELLITE IF CHANNEL FILTERS
Manufacturer
FARADAY [Faraday Technology]
Datasheet
1.FB281.pdf
(2 pages)
Table 1 – Amplitude
See over
FB282 – Eutelsat Full Transponder
FB281 – Eutelsat Half Transponder
FB296 – Intelsat 17.5 MHz Carrier
FB295 – Intelsat 20 MHz Carrier
FB294 – Intelsat 30 MHz Carrier
FB552 – Arabsat 32 MHz Carrier
FB404 – Astra
Table 2 – Group delay
See over
FB282 – Eutelsat Full Transponder
FB281 – Eutelsat Half Transponder
FB296 – Intelsat 17.5 MHz Carrier
FB295 – Intelsat 20 MHz Carrier
FB294 – Intelsat 30 MHz Carrier
FB552 – Arabsat 32 MHz Carrier
FB404 – Astra
Features
A range of bandpass filters for use in 70 MHz I.F. stages of satellite links. Designed to meet the
tight amplitude and group delay characteristics necessary for close channel separation as specified
in the Eutelsat, Intelsat, Arabsat and Astra templates. A particular feature is the passive logic array
which can be interrogated electronically to detect the presence and type of filter. Other templates
and different I.F. frequencies considered on request.
Fara102
© Faraday Technology. As part of continual product improvement the specifications, details and dimensions shown in this publication are subject to change without notice
SATELLITE IF CHANNEL FILTERS
A particular feature is the passive logic array
which can be interrogated electronically to
detect the filter type (see table opposite).
Pins 21 and 22 are linked internally and can
be used to determine if a filter is present in its
mounting slot. Pin 16 is connected to a
voltage representing logic 1 and pins 17 to 20
are either connected to this or ground.
Tight amplitude and group delay specifications
Consistent 6 dB Insertion Loss across range
Impedance: 75
MHz
A/3
9.6
8.0
4.2
4.8
8.0
8.6
6.7
MHz
A/3
9.6
8.0
4.2
4.8
8.0
8.6
6.7
MHz
28.8
24.0
12.6
14.4
24.0
25.8
20.2
A
MHz
28.8
24.0
12.6
14.4
24.0
25.8
20.2
15.75
MHz
A
36.0
30.0
18.0
30.0
32.0
25.2
B
Page 1 of 2
MHz
45.5
35.0
18.0
20.5
37.0
28.9
----
C
Geometrically symmetric response
Remote filter identification
Passband return loss: > 15 dB
MHz
33.1
30.0
14.2
16.6
30.0
32.0
24.6
Filter Type
FB281
FB282
FB294
FB295
FB296
FB404
FB552
H
MHz
60.0
50.0
26.5
28.0
54.0
40.0
----
D
dB
0.6
0.3
0.3
0.3
0.5
0.6
0.2
a
ns
3
4
6
4
5
2
2
f
Pins
dB
2.5
3.0
2.5
2.5
2.5
2.5
2.2
b
17
0
0
0
0
0
0
1
ns
10.0
10.0
g
5
6
6
5
5
3
3
dB
----
7.0
6.5
7.5
8.3
c
18
0
0
0
1
1
1
0
19
0
1
1
0
0
1
1
dB
----
25
25
25
25
25
25
May-99(A)
d
20
1
0
1
0
1
0
0
ns
15
15
15
15
15
12
12
h
dB
0.3
0.1
0.1
0.1
0.3
0.3
0.0
e
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FB281 Summary of contents
Page 1
... Other templates and different I.F. frequencies considered on request. Table 1 – Amplitude See over FB282 – Eutelsat Full Transponder FB281 – Eutelsat Half Transponder FB296 – Intelsat 17.5 MHz Carrier FB295 – Intelsat 20 MHz Carrier FB294 – Intelsat 30 MHz Carrier FB552 – Arabsat 32 MHz Carrier FB404 – ...
Page 2
PACKAGE DETAIL Note: For correct operation all the ground pins should be taken to a good earth plane. Faraday Technology Ltd. Croft Road Industrial Estate, Newcastle, Staffordshire ST5 0QZ. England. Fara102 Tel: Fax: Email: Web site: Page ...