tfs440.doc

version 1.3

15.06.2000

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Filter specification

TFS 440

-

1/5

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VI TELEFILTER

Vectron International, Inc.

Potsdamer Straße 18

267 Lowell Road

Measurement condition

Ambient temperature:

23

°C

Input power level:

0 dBm

Terminating impedances

for input:

250

Ω // -0.8 pF

for output:

250

Ω // -0.8 pF

Characteristics

Remark:

Reference level for the relative attenuation arel of the TFS 440 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 440 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

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Insertion loss

ae = amin

4.4

dB

max.

6,5

dB

(Reference level)

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Nominal frequency

fN

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-

440,000 MHz

Guaranteed 1,5 dB signal band width

BW

293

kHz

min.

140

kHz

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Relative attenuation

arel

fN ± 70 kHz

0.5

dB

max.

1,5

dB

fN ± 100 kHz

1.0

dB

max.

3,0

dB

fN ± 400 kHz ... fN ± 600 kHz

29

dB

min.

25

dB

fN ± 600 kHz ... fN ± 800 kHz

48

dB

min.

40

dB

fN ± 800 kHz ... fN ±

3 MHz

58

dB

min.

50

dB

f

±

3 MHz ... f

±

78 MHz

62

dB

min.

50

dB

N

N

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Group delay ripple

GD

f

± 100 kHz

1.1

µs

max.

2

µs

N

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Operating temperature range

- 20

°C ... + 70 °C

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Maximum Input Power

10

dBm

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Temperature coefficient of frequency

TC

ca. - 0.036 ppm/K²

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Frequency inversion temperature

+ 25

°C

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Generated:

Checked / approved:

D 14 513 TELTOW / Germany

Hudson, NH 03051 / USA

Tel: (+49) 3328 4784-52 / Fax: (+49) 3328 4784-30

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

E-Mail: tft@telefilter.com

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.