file: TFS420b.doc
version 1.1
01/99
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VI TELEFILTER
Filter specification
TFS 420 B
1/4
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Measurement condition
Ambient temperature:
23
°C
Input power level:
0 dBm
Source impedance:
162
Ω
|| -0,39 pF
Load impedance:
162
Ω
|| -0,39 pF
Construction, pin connection and 50
Ω
test circuit
See page 2
Stability characteristics and packing
See page 3
Air reflow temperature conditions
See page 4
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 420 B is the minimum of the pass band attenuation amin. The minimum of the pass band
attenuation amin is defined as the insertion loss ae. The centre frequency fo is the arithmetic mean value of the upper and lower frequencies at the
2 dB filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed on 420 MHz without tolerance. The given values for
the relative attenuation arel and for the group delay ripple have to be reached at the frequencies given below also if the centre frequency fo is shifted
due to the temperature coefficient of frequency TCf in the operating temperature range and due to a production tolerance for the centre frequency fo
Data
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3
dB
max. 5
dB
ae = amin
Insertion loss
(Reference level)
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-
420
MHz
fN
Nominal frequency
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420
MHz
-
Centre frequency
fo
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Pass band ripple
fN ± 10 MHz
1
dB
max. 2
dB
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Relative attenuation
arel
typ. value
tolerance / limit
320 MHz ... 340 MHz
60
dB
min. 50
dB
365 MHz ... 385 MHz
> 40
dB
min. 40
dB
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Operating temperature range
- 25
°C
... + 75
°C
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- 65
ppm/K
-
Temperature coefficient of frequency
TCf
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Input power level
max. 10
dBm
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*) At the moment we are carrying out tests to check the possibility of guaranteing higher limiting values.
Generated:
Checked / approved:
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VI TELEFILTER
Vectron International, Inc.
Potsdamer Straße 18
267 Lowell Road
D 14 513 TELTOW / Germany
Hudson, NH 03051 / USA
Tel: (+49) 3328 4784-52 / Fax: (+49) 3328 4784-30
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail: tft@telefilter.com
E-Mail: vti@vtinh.com
VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is
assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.
VECTRON [ Vectron International, Inc ]
