TFS235A Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter Specification

Tfs235a.doc
VI TELEFILTER
version 1.6
Filter Specification
TFS 235A
01.06.2001
1/5
Measurement condition
Ambient temperature:
23
Input power level:
0
Terminating impedances
for input:
for output:
C
dBm
1,38 kOhm // -1,5 pF
1,38 kOhm // -1,5 pF
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 235A is the insertion loss. The insertion loss ae is defined as the minimum of
attenuation in pass band. The centre frequency fc 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 f_N is fixed on 235,008 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 fc 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 fc.
Data
Insertion loss
ae
(Reference level)
Nominal frequency
f_N
Centre frequency
f_C
3 dB bandwidth
BW
Relative attenuation
f_N
... f_N ± 30
f_N ± 30 kHz ... f_N ± 75
f_N ± 200 kHz ... f_N ± 4
f_N ± 4 MHz ... f_N ± 10
f_N ± 10 MHz ... f_N ± 12
arel
kHz
kHz
MHz
MHz
MHz
Group delay
GD
ripple f_N ... f_N ± 25 kHz
Operating temperature range
Storage temperature range
Temperature coefficient of frequency TC
Frequency inversion temperature
typ. value
5,3 dB
-
235,02 MHz
-
0.4
dB
1,3 dB
16...50
dB
53
dB
55
dB
3,2 µs
0,4 µs
ca. – 0,036 ppm/K²
+ 25 C
tolerance/limit
max. 8
dB
235,008 MHz
-
min. 150
kHz
max. 1
dB
max. 3
dB
min. 11
dB
min. 50
dB
min. 40
dB
max. 5
µs
max. 1,5 s
- 25 C ... + 75 C
- 40 C ... + 85 C
Generated:
Checked / approved:
VI TELEFILTER
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Vectron International, Inc.
267 Lowell Road
Hudson, NH 03051 / USA
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E-Mail: [e-mail]
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