IL145567

Analogue transmission characteristics

Through

channel

Channel AD Channel DA

Characteristic

min

max min max min max

Unit

Change of amplification ratio (relatively to level 0 dBm0

–

–

-0.25 0.25 -0.25 0.25

dB

Change of amplification ratio

depending on temperature

0 to 70

°С

–40 to + 85

°С

–

–

–

–

–

–

–

–

dB

Change of amplification ratio depending on supply

–

–

–

–

dB

Change of amplification ratio

depending on signal strength

(relatively to level -10 dBm0 on

frequency 1.02 kHz) *

from 3 to –40 dB

from –40 to –50 dB

from –50 to –55 dB

-0.4

-0.8

-1.6

0.4

0.8

1.6

-0.2

-0.4

-0.8

0.2

0.4

0.8

-0.2

-0.4

-0.8

-0.2

-0.4

-0.8

dB

Total distortions of signal at

frequency 1 kHz

3 dBм0

0

÷ - 30 dBm0

-40 dBm0

-45 dBm0

-55 dBm0

33

35

29

24

15

–

33

36

30

25

15

–

33

36

30

25

15

–

dB

Total distortions with pseudonoise

as per CCITT G.714

-3 dBm0

6

÷ - 27 dBm0

-34 dBm0

-40 dBm0

-55 dBm0

27.5

35

33.1

28.2

13.2

–

28

35.5

33.5

28.5

13.5

–

28.5

36

34.2

30

15

–

dB

Noise of "silent" channel (for trough channel and

channel AD psophometrically weighted)

–

-70

–

-70

–

-83

dBm

Amplitude-frequency characteristic

(AFC).

(Relatively to level 0 dBm0 at

frequency 1.02 kHz) *

15 Hz

50 Hz

60 Hz

200 Hz

from 300 to 3000 Hz

3300 Hz

3400 Hz

4000 Hz

4600 Hz

–

–

–

–

-0.3

-0.70

-1.6

–

–

-40

-30

-26

–

0.3

0.3

0

-28

-60

–

–

–

-1.0

-0.15

-0.35

-0.8

–

–

-40

-30

-26

-0.4

0.15

0.15

0

-14

-32

-0.15

-0.15

-0.15

-0.15

-0.15

-0.35

-0.8

–

–

0

0

0

0

0.15

0.15

0

-14

-30

dB

Noise level in the frequency range from 300 to 3000 Hz

(relatively to level 0 dBm0 at frequency 1.02 kHz under

transmission and receipt) *

–

-48

–

-48

–

-48

dB

Attenuation of parasitic

harmonics beyond the limits of

gating frequency VFRO VFRO

(Relatively to input signal of

frequency 300–3400 Hz and

level

0 dBm0)

from 4600 to 7600 Hz

from 7600 to 8400 Hz

from 8400 to 100000

Hz

–

–

–

-30

-40

-30

–

–

–

–

–

–

–

–

–

-30

-40

-30

dB

6