TFS326A_06 Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Filename: tfs 326a.doc
VI TELEFILTER
Version 1.9
Filter specification
TFS 326A
13.10.2006
1/5
Measurement condition
Ambient temperature:
Input power level:
Terminating impedance: *
Input:
Output:
23
°C
0
dBm
237 Ω || -0,30 pF
237 Ω || -0,30 pF
Characteristics
Remark:
The reference level for the relative attenuation arel of the TFS 326A 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 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 fN is fixed at 326,4 MHz without any tolerance. The given values for both the
relative attenuation arel and the group delay ripple have to be achieved at the frequencies given below even 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
typ. value
tolerance / limit
Insertion loss
(reference level)
Nominal frequency
Centre frequency
ae
2,6 dB
f_N
-
f_C
326,4 MHz
max.
4,5 dB
326,4 MHz
-
Passband
Pass band ripple
PB
-
0,6 dB
f_N
±
max.
2,50 MHz
0,8 dB
Bandwidth
3 dB
Relative attenuation
f_N
f_N ±
f_N +
f_N +
f_N +
f_N +
f_N -
f_N -
f_N -
f_N +
2,5
12,5
13,28
14,85
18,9
12,5
13,75
30,0
40,0
…. f_N ±
MHz _... f_N ±
MHz … f_N +
MHz … f_N +
MHz … f_N +
MHz … f_N +
MHz … f_N –
MHz … f_N –
MHz … f_N –
MHz … f_N +
Group delay ripple within PB
BW
2,5
7,0
13,28
14,85
18,9
40,0
13,75
30,0
316,4
123,6
arel
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
17,5 MHz
0,6 dB
2,0 dB
24
dB
19
dB
15
dB
18
dB
14
dB
18
dB
27
dB
52
dB
21
ns
min.
max.
max.
min.
min.
min.
min.
min.
min.
min.
min.
max
14,0 MHz
0,8 dB
3,0 dB
11 dB
15 dB
13 dB
15 dB
11 dB
15 dB
25 dB
25 dB
40,0 ns
Group delay ripple within ± 7,0 MHz
58
ns
max. 100,0 ns
Return loss within PB
13,5 dB
min.
12,0 dB
Return loss within ± 7,0 MHz
12
dB
min.
8,0 dB
Input power level
-
max.
15,0 dBm**
Operating temperature range
Storage temperature range
Temperature coefficient of frequency
OTR
TCf ***
-
-
- 73
ppm/K
- 10 °C ... + 80°C
- 40 °C ... + 85°C
*) 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.
**) peaks with 20 dBm allowed for 1:100 duty cycle
***) ∆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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