
Tfs300.doc
VI
TELEFILTER
version 1.3
28.03.2001
Filter Specification
TFS 300
1/5
VI TELEFILTER
Potsdamer Strae 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
E-Mail:
tft@telefilter.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.
Vectron International Inc.
267 Lowell Road
Hudson, NH 03051 / USA
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail:
vti@vtinh.com
Measurement condition
Ambient temperature:
Input power level:
Terminating impedances
23
°
C
0 dBm
for input:
for output:
External coil:
607
// - 1,7 pF
607
// - 1,7 pF
122 nH
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 300 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 on 300,0 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 also 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.
D a t a
typ. value
tolerance/limit
Insertion loss
(Reference level)
ae = amin
-
max.
6,5
dB
Nominal frequency
fN
-
300,000 MHz
Centre frequency
fC
300,01
Usable signal bandwidth
-
min.
140
kHz
3 dB bandwidth
BW
-
min.
280
kHz
Relative attenuation
fN ± 400 kHz
fN ± 400 kHz ... fN ± 600 kHz
fN ± 600 kHz ... fN ±
arel
-
-
-
min. 15
min. 27
min. 35
dB
dB
dB
13 MHz
Group delay ripple
fN ±
70 kHz
GD
-
max.
2
μ
s
Operating temperature range
-20
°
C ... +70
°
C
Temperature coefficient of frequency
TC
-0.036
ppm/K2
Frequency inversion temperature
+ 20
°
C
Generated:
Checked / approved: