tfs400g.doc

version 1.1

08.01.2002

Filter Specification

TFS 400 G

1/5

VI TELEFILTER

Vectron International Inc.

Potsdamer Stra

ße 18

267 Lowell Road

D 14 513 TELTOW / Germany

Hudson, NH 03051 / USA

Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30

Tel: (603) 598-0070 Fax: (603) 598-0075

E-Mail:

tft@telefilter.com

E-Mail:

vti@vtinh.com

Measurement condition

Ambient temperature:

23

C

Input power level:

0 dBm

Terminating impedances *)

for input :

335

-0,83 pF

for output :

335

-0,83 pF

External coil

:

74 nH

Characteristics

Remark:

Reference level for the relative attenuation arel of the TFS400G 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 400 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

ae = amin

3,6

dB

max.

6,5

dB

(Reference level)

Nominal frequency

fN

-

400,000 MHz

Centre frequency

fc

400,008 MHz

Guaranteed 1,5 dB signal band width

BW

260

kHz

min.

160

kHz

Relative attenuation

arel

fN

...fN ±

80 kHz

0,5

dB

max.

1,5

dB

fN ± 200 kHz...fN ± 400 kHz

6

dB

min.

2

dB

fN ± 400 kHz ... fN ± 600 kHz

30

dB

min.

25

dB

fN ± 600 kHz ... fN ±

1 MHz

56

dB

min.

40

dB

fN ±

1 MHz ... fN ±

3 MHz

56

dB

min.

45

dB

fN ±

3 MHz

61

dB

min.

55

dB

Group delay ripple

GD

fN ± 70 kHz

0,5

µs

max.

2

s

Operating temperature range

-

- 10 C ... + 55

C

Storage temperature range

-

- 35 C ... + 85

C

Temperature coefficient of frequency

TC

- 0.036

ppm/K²

Frequency inversion temperature

+ 20 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.

Generated:

Checked / approved:

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.