tfs 420A.doc
Version 1.1
06.01.02
VI TELEFILTER
Filter specification
TFS 420A - 1/4
1. Measurement condition
Ambient temperature
T
A
:
23 擄C
Input power level:
0
dBm
for input:
Typical terminating impedances in
f
N
:
for output:
210
鈩?錚鳳／
-5,38 pF.
174
鈩?錚鳳／
-3,99 pF.
2. Characteristics
Remark:
Reference level for the relative attenuation
arel
of the
TFS 420A
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 nominal frequence
f
N
is fixed at
420,0 MHz
without tolerance or limit. The
reference frequence
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 temperature coefficient of frequency
Tc
f
is valid both for the reference frequency
fc
and the frequency response of the
filter in the operating temperature range.
Data
typ. value
tolerance / limit
21,5
dB
max 24
dB
Insertion loss
(Reference level)
ae
-
420,0
MHz
Nominal frequency
f
N
Centre frequency
fc
at ambient temperature
( f
CAT
)
420,03
MHz
-
Pass band (-1dB)
f
N
- 4,1 MHz ... f
N
+ 4,1 MHz
0,4
dB
max 1,0
dB
Amplitude ripple (p-p):
f
N
... f
N
鹵 4,1 MHz
Bandwidth
at ambient temperature:
1 dB - band width
9,14
MHz
3 dB - band width
10,50
MHz
20 dB - band width
14,23
MHz
40 dB - band width
15,91
MHz
Relative attenuation arel
f
N
f
N
鹵 4,1
MHz
-
max. 1
dB
MHz
f
N
鹵 5,0
MHz
-
max. 3
dB
f
N
鹵 4,1
MHz
f
N
鹵 10
MHz
-
min. 3
dB
f
N
鹵 5,5
MHz
f
N
鹵 100
MHz
45...60
dB
min. 40
dB
f
N
鹵 10
MHz
f
N
- 100
MHz
70...80
dB
f
N
- 430
MHz
f
N
+ 300
MHz
60...70
dB
f
N
+ 100
Average group delay
in pass band:
0,630
碌s
Group delay ripple
in pass band
(p-p):
40
ns
max 60
ns
Triple transit attenuation compared to main signal:
45...49
dB
Crosstalk
50...54
dB
Frequency inversion temperature ( T
o
)
30
擄C
- 0,050
ppm/K虜
Temperature coefficient of frequency ( Tc
f
)
Frequency deviation of fc over temperature T : *)
鈭唂
c(Hz) = Tc
f
(ppm/K) x (T - T
o
)虜 x f
To
(MHz)
Operating temperature range
-20 擄C ... + 75 擄C
Storage temperature range
- 40 擄C ... + 85 擄C
Input power level
-
max. + 10
dBm
*) f
To
is reference frequence
fc
at frequency inversion temperature (T
o
)
Generated:
Wadim P. Dunzow
Checked/Approved:
Dr. Bert Wall
____________________________________________________________________________________________________________________________________________________________________________________________________________
VI TELEFILTER
Potsdamer Stra脽e 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-52 / Fax: (+49) 3328 4784-30
E-Mail: tft@telefilter.com
Vectron International, Inc.
267 Lowell Road
Hudson, NH 03051 / USA
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail: vti@vtinh.com
____________________________________________________________________________________________________________________________________________________________________________________________________________
VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is
assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information
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