English
Language : 

TFS340 Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification
TFS340.doc
VI TELEFILTER
version 1.1
Filter specification
Measurement condition
Ambient temperature:
23 C
Input power level:
0 dBm
Input impedance*):
162 // -0.5 pF
Output impedance:
162 // -0.5 pF
11.02.03
TFS 340
1/5
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 340 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 3dB filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed at 340,0 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 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
Insertion loss
(Reference level)
ae = amin
typ. value
2,50 dB
tolerance / limit
max. 3,0 dB
Nominal frequency
fN
Centre frequency
fc
-
340,0 MHz
340,0
-
MHz
Pass band ripple
fN ± 10 MHz
Relative attenuation
arel
max. 3,0 dB**)
fN -
fN -
fN +
fN +
fN +
80,0
35,0
25,0
57,5
127,5
MHz ... fN - 100,0
MHz ... fN - 55,0
MHz ... fN + 57,5
MHz ... fN + 82,5
MHz ... fN + 152,5
Intermodulation
IP3
Input power level
MHz
MHz
MHz
MHz
MHz
55
dB
60
dB
25
dB
55
dB
60
dB
-
-
min. 50,0
min. 30,0
min. 20,0
min. 40,0
min. 57,0
min. 20,0
max. 10,0
dB
dB
dB
dB
dB
dBm **)
dBm
Permissible DC voltage VDC
-
max. 12,0 V
Operating temperature range
Temperature coefficient of frequency Tcf
Storage temperature range
-
-65 ppm/K
-
- 25 C ... + 75 C
-
- 40 C ... + 85 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.
**) -3 dB over fN 10 MHz at ambiente temperature (23 °C).
***) modulation signals:
fN + 1 MHz and fN + 2 MHz, each of 10 dBm
Generated:
Checked / approved:
TELEFILTER GmbH
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
E-Mail: tft@telefilter.com
I 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.