TFS245B Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Filename: tfs 245b.doc
VI TELEFILTER
Version 1.3
Filter specification
Measurement condition
Ambient temperature:
Input power level:
Terminating impedance *)
for input:
for output:
23
°C
0
dBm
955 Ω // -5,8 pF
900 Ω // -6,3 pF
TFS 245B
21.07.2004
1/5
Characteristics
Remark:
The nominal frequency fN is fixed at 245,952. The insertion loss ae is defined as loss value determined at fN. Reference level for the relative attenuation
arel of the TFS 245B is the insertion loss ae. 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. All specified data are met within the operating temperature range.
Data
typ. value
tolerance / limit
Insertion loss
ae
Nominal frequency
f_N
Passband
Pass band ripple
Bandwidth
BW
3 dB
Absolute attenuation
aabs
f_N ±
f_N ±
f_N ±
0,95
2,50
12,50
MHz ... f_N
MHz ... f_N
MHz ... f_N
Group delay ripple within PB
± 2,50
± 12,50
± 50,00
MHz
MHz
MHz
Return loss within PB
5,6 dB
-
-
0,4 dB
850
kHz
30
dB
40
dB
56
dB
170
ns
16
dB
max.
f_N ±
max.
8 dB
245,952 MHz
250
kHz
1 dB
min.
27 dB
min.
32 dB
min.
50 dB
max. 300 ns
min.
12 dB
Operating temperature range
OTR
-
- 25 °C ...+ 75 °C
Storage temperature range
-
- 40 °C ... + 85 °C
Turn over temperature
22
°C
-
Temperature coefficient of frequency
TCf **
-0,04 ppm/K²
-
*)The terminating impedances depend on parasitics and q-values of matching elements and the board used, and are to be understood as
reference values only. Should there be additional questions do not hesitate to ask for an application note or contact our design team.
**) ∆fc(Hz) = Tc_f(ppm/K) x (T - T_o) x f_CAT (MHz).
Generated:
Checked / Approved:
Tele Filter GmbH
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: [phone] / Fax: [phone]
E-Mail: [e-mail]
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