tfs241.doc
version1.0
06.01.02
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TELE FILTER tft GmbH
SAW filter specification
TFS 241
1/4
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Measurement condition
Ambient temperature:
Input power level:
Source impedance:
Load impedance:
Ext coil:
Construction
see page 2
23
°C
-10 dBm
580
Ω
|| -1,4 pF
580
Ω
|| -1,4 pF
140 nH
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 241 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 3
dB filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed on 241 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
typ. value
tolerance / limit
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3,9
dB
max 5
dB
ae = amin
Insertion loss
(Reference level)
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-
241,000 MHz
fN
Nominal frequency
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Pass band ripple
fN - 70 kHz ... fN + 70 kHz
0,5
dB
max 2
dB
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Relative attenuation
arel
fN
fN ±
fN ±
fN ±
fN ±
fN ±
fN ±
...
330
kHz ...
400
kHz ...
600
kHz ...
1,6 MHz ...
3
MHz ...
10
MHz ...
fN ±
fN ±
fN ±
fN ±
fN ±
fN ±
fN ±
70
400
600
1,6
3
10
25
kHz
kHz
kHz
MHz
MHz
MHz
MHz
0,5
28
40
52
55
60
55
dB
dB
dB
dB
dB
dB
dB
max 2
min 18
min 28
min 40
min 48
min 50
min 45
dB
dB
dB
dB
dB
dB
dB
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GDD
Group delay distortion
fN ±
70
kHz
0,5
µs
max 1,5
µs
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Operating temperature range
- 20
°C
... + 70
°C
Storage temperature range
- 40
°C
... + 85
°C
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- 0,036 ppm/K²
-
Temperature coefficient of frequency
TCf
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Frequency inversion temperature
+ 25
°C
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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 ]
