TFS346C Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Filename: tfs 346c.doc
VI TELEFILTER
Version 1.0
Filter specification
TFS 346C
15.05.2006
1/5
Measurement condition
Ambient temperature:
Input power level:
Terminating impedance: *
Input:
Output:
23
°C
0
dBm
385 Ω || -6,1 pF
255 Ω || -4,8 pF
Characteristics
Remark:
The reference level for the relative attenuation arel of the TFS346C 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 346 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)
ae
10,0 dB
max. 14,5 dB
Nominal frequency
fN
Centre frequency at ambient temperature fc
-
346,03 MHz
346 MHz
-
Pass band
PB
Amplitude ripple within fN ± 0,7 MHz
In band ripple
(in any 112,5 kHz increment within the PB)
-
0,7 dB
0,2 dB
fN ±
max.
max.
0,75 MHz
0,8 dB
0,5 dB p-p
Relative attenuation
arel
fN
fN ± 0,7
......... fN ± 0,7 MHz
MHz ......... fN ± 0,75 MHz
fN ± 1,6 MHz ......... fN ± 1,75 MHz
fN ± 1,75 MHz ......... fN ± 3,25 MHz
fN ± 3,25 MHz ......... fN ± 5
MHz
DC
......... fN - 5
MHz
fN + 5 MHz ......... fN + 1,5 GHz
0,5 dB
0,3 dB
47 dB
43 dB
48 dB
55 dB
55 dB
max. 0,8 dB
max. 1,2 dB
min. 39 dB
min. 40 dB
min. 45 dB
min. 50 dB
min. 50 dB
Group delay at fN
Group delay ripple within 80% of PB
(in any 112,5 kHz increment within)
0,9 µs
120 ns
max. 2 µs
max. 160 ns
Phase linearity within 80% of PB
(in any 112,5 kHz increment within)
2,8 deg
max. 6 deg p-p
Input power level
-
max. 23 dBm**)
Operating temperature range
-
- 40 °C ... + 70 °C
Storage temperature range
-
- 40 °C ... + 100 °C
Turnover temperature T_o
20
°C
-
Temperature coefficient of frequency TC_f***
- 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.
**) This power level is only allowed for short term operation (10% of the life time), the max. input power for continuous operation is max.15dBm only
***) ∆f(Hz) = TCf(ppm/K²) x (T-T₀)² x fTo(MHz)
Generated:
Checked / Approved:
Filter characteristic
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D 14 513 TELTOW / Germany
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