TFS208K Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter Specification

Tfs208k.doc
VI TELEFILTER
version 1.2
Filter Specification
TFS 208 K
03.06.2003
1/5
Measurement Condition
Ambient temperature:
23 C
Input power level:
0 dBm
Source impedance:
50 single ended
Load impedance:
50 single ended
Terminating impedances: *) input: 460 // -10,7 pF
output: 940 // - 6,8 pF
Characteristics
Remark: Reference level for the relative attenuation arel of the TFS 208K is the minimum of the pass band attenuation. Reference for the echo
response attenuation is the main time response lobe, the reference time is defined as t0. The nominal frequency fN is fixed at 208 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 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
Limit
Absolute attenuation within PB
6,5 dB
6 ... 8,5 dB
Nominal frequency fN
-
208 MHz
Pass band (PB)
1,85 dB bandwidth
-
1,49 MHz
fN
0,6 MHz
min. 1,2 MHz
Relative attenuation
fN
... fN
fN
0,1 MHz ... fN
fN
0,4 MHz ... fN
arel
0,1 MHz
0,4 MHz
0,6 MHz
fN 1,2 MHz ... fN 1,8 MHz
fN 1,8 MHz ... fN 6 MHz
fN 6 MHz ... fN 13 MHz
fN - 13 MHz ... fN - 198 MHz
fN + 13 MHz ... fN + 21 MHz
fN + 21 MHz ... fN + 242 MHz
Echo response attenuation arel
t0 + 1 µs
t0 + 2 µs
t0 + 3 µs
t0 + 4 µs
t0 + 5 µs
Group delay
at fN
Group delay ripple within fN PB
Input power level
0,1 dB
0,15 dB
0,4 dB
6,6 dB
18 dB
48 dB
55 dB
52 dB
65 dB
28 dB
39 dB
45 dB
65 dB
70 dB
705 ns
105 ns
-
max.
max.
max.
min.
min.
min.
min.
min.
min.
0,4 dB
0,7 dB
1,85 dB
6 dB
15 dB
40 dB
50 dB
42 dB
50 dB
min. 20 dB
min. 30 dB
min. 40 dB
min. 40 dB
min. 50 dB
max. 800 ns
max. 150 ns
max. + 10 dBm
VSWR
within fN PB
Intermodulation products **
1,5 : 1
-65 dBm
max. 2 : 1
max. -60 dBm
Operating temperature range
Storage temperature range
Temperature coefficient of frequency
Frequency inversion temperature
TCf ***
T0
-
-
-0,04
45
ppm/K²
°C
- 10 °C ... + 85 °C
- 40 °C ... + 125 °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.
**) fin,1=208MHz; fin,2=208,1MHz; Pin=4dBm+loss @fN; fout,1=207,9MHz; fout,2=208,2MHz; then Pout <-56dBm
***) f(Hz) = TCf(ppm/K²) x (T-T0)² x fTo(MHz)
generated:
checked / approved:
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