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TFS248D Filter Specification
型号:   TFS248D
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描述:   Filter Specification
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品牌   VECTRON [ Vectron International, Inc ]
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Tfs248d.doc
version 2.1
14.09.00
VI
TELEFILTER
Measurement condition
Ambient temperature:
Input power level:
Terminating impedance:
source:
load:
23
°C
0 dBm
630
|| -5,6 pF
600
|| -5,7 pF
Filter Specification
TFS 248 D
1/5
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 248 D is the minimum of the pass band attenuation amin. This value is defined as the
insertion loss ae. The nominal frequency fN is fixed to 248,6 MHz. 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
Limit
______________________________________________________________________________________________________
Insertion Loss
(at ambient temperature)
4,0 dB
ae = a0
3,0 ... 6,0 dB
drift vs. Temperature
max.
±
0,5 dB
______________________________________________________________________________________________________
-
248,6 MHz
Nominal Frequency
fN
______________________________________________________________________________________________________
Centre Frequency
248,6 MHz
-
f0
______________________________________________________________________________________________________
3 dB bandwidth
min. 240 kHz
Bw
3dB
______________________________________________________________________________________________________
Passband
fN
±
95 kHz
______________________________________________________________________________________________________
Relative Attenuation
fN
±
95
kHz
fN
±
95
kHz ... fN
±
120
arel
kHz
max.
1,2 dB
-0,9 ... +2,1 dB
fN
±
330
kHz ... fN
±
600
kHz
min. 13
dB
fN
±
600
kHz ... fN
±
800
kHz
min. 22
dB
fN
±
800
kHz ... fN
±
3
MHz
min. 30
dB
fN
±
3
MHz ... fN
±
105
MHz
min. 48
dB
fN
±
105
MHz ... fN
±
150
MHz
min. 51
dB
______________________________________________________________________________________________________
Group Delay
3
µs
GD
max.
Group Delay Ripple fN ± 95 kHz
-
max.
0,7
µs
fN ± 120 kHz
-
max.
1,0
µs
______________________________________________________________________________________________________
Input power level
-
max. 12
dBm
______________________________________________________________________________________________________
Operating Temperature Range
-5 °C ... + 75 °C
______________________________________________________________________________________________________
Temperature Coefficient
- 0,032 ppm/K2
-
TC
______________________________________________________________________________________________________
generated:
checked / approved:
______________________________________________________________________________________________________
VI TELEFILTER
Vectron International, Inc.
Potsdamer Straße 18
267 Lowell Road
D 14 513 TELTOW / Germany
Hudson, NH 03051 / USA
Tel: (+49) 3328 4784-0 / 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.
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