TFS38C Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

TFS 38C.doc
VI TELEFILTER
Filter specification
Version 1.1
TFS 38C
04.07.2002
1/5
1. Measurement condition :
Ambient temperature T_A:
Input power level:
Terminating impedances at fc :
23 °C
0 dBm.
for input: 50 Ω  0 pF.
for output: 50 Ω  0 pF.
2. Characteristics :
Remark: Reference level for the relative attenuation arel of the TFS 38C 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 20 dB filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed on 38 MHz without tolerance.
The temperature coefficient of frequency Tc_f is valid both for the reference frequency fc and the frequency response of the filter. All specified
parameters have to be reached in the operating temperature range ( OTR ) .
Data
Insertion loss (Reference level) ae
typ. value
22,5 dB
tolerance / limit
max. 25 dB
Nominal frequency : fN at temperature T_O = 30°C
Centre frequency fc at ambient temperature T_A = 23°C (f_CAT)
38,000 MHz
38,019 MHz
38 MHz
Pass band ( PB ) at OTR : 0°C ... 60°C :
Amplitude ripple in PB (p-p) :
0,15 dB
f_N - 2,48 MHz ... f_N + 2,48 MHz
max. 0,4 dB
Bandwidth
0,5 dB
1 dB
3 dB
at ambient temperature T_A (f_CAT) :
10 dB
20 dB
30 dB
40 dB
Bandwidth at OTR : 0°C ... 60°C :
0,5 dB - band width
3 dB - band width
30 dB - band width
Relative attenuation
arel
f_N ..... f_N ± 2,48 MHz
f_N ± 2,48 MHz ... f_N ± 3,0 MHz
f_N ± 4,25
f_N - 26
f_N + 6
f_N + 20
MHz ... f_N ± 6
MHz ... f_N - 6
MHz ... f_N + 20
MHz ... f_N + 26
MHz
MHz
MHz
MHz
Group delay ( mean value in PB ):
Group delay ripple in PB (p-p):
Deviation from linear phase in PB (p-p):
5,78 MHz
6,01 MHz
6,47 MHz
7,21 MHz
7,74 MHz
8,10 MHz
8,30 MHz
5,60 MHz
6,29 MHz
8,28 MHz
0,15 dB
2
dB
40
dB
45...50
dB
45...50
dB
42...38
dB
1,46 µs
25
ns
1,5 deg
min. 5,14 MHz
min. 6,18 MHz
max. 8,32 MHz
min.
min.
max.
4,96 MHz
6,00 MHz
8,50 MHz
max. 0,4 dB
max. 3
dB
min. 30
dB
min. 40
dB
min. 40
dB
min. 35
dB
max. 60
ns
Triple transit attenuation compared to main signal
Crosstalk
55
dB
60...70
dB
Temperature coefficient of frequency ( Tc_f )
Frequency deviation of fc over temperature
Operating temperature ( OTR ) :
Storage temperature range
-75 ppm/K
∆fc(Hz) = Tc_f(ppm/K) x (T - T_A) x f_CAT (MHz)
0°C ... + 60 °C
- 25 °C ... + 85 °C
Generated:
Checked / approved:
Dunzow W.
Dr. Bert Wall
VI TELEFILTER
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: [phone] / Fax: [phone]
E-Mail: [e-mail]
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