Jung SIVM27 handleiding

Handleiding

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BAA

0 dB

BVVU

1 dB

BVVU

1 dB

BVVU

1 dB

12 dB

7 m

5 m

5 m

5 m

12 dB

12 dB

25 m 11 m4 m4 m 12 m

Apartment 1

Apartment 2

Apartment 3

Apartment 4

4 Conguration, conductor lengths

Example to determine the attenuation

Example to determine the atten-

uation with bus distributor

The system is installed using J-Y(St)Y

cable 0.8mm diameter. This means

that 10m of conductor length have

an attenuation of 2dB. Apartment4

is decoupled using a bus audio

decoupler BAA650-…, apartment1

- apartment3 are connected via bus

video distributor BVVU650-…

Attenuation in the camera

branch

Conductor length between the door

station and the sub-distributor 25m.

25m=5dB

Attenuation in the monitor

branch to apartment3

Conductor length of the installation

cable. All values added, from the

bus video line rectier to the bus

telephone:

11m+4m+5m=20m

20m conductor length corresponds

to 4dB attenuation

Attenuation of the bus distributor

BVVU650-…=12dB

Total value:

12dB distributor + 4dB conductor

= 16dB

This means that apartment3

has a total attenuation from the

camera to the bus telephone of

16dB+5dB=21dB

Attenuation in the monitor

branch to apartment1

Conductor length of the installation

cable. All values added, from the

bus video line rectier to the bus

telephone:

11m + 4m + 4m + 12m + 7m

= 38m

38m of conductor material add up

to 7.6dB

Attenuation of all bus distributors:

1dB + 1dB + 12dB =14dB

Total value:

14dB distributor + 7.6dB conductor

=21.6dB

Apartment 1 has a total attenuation

from the camera to the bus tele-

phone of 21.6dB + 5dB =26.6dB

The maximum value with this

example would be 26.6dB from

the most distant video door station

to the most distant bus telephone,

the maximum admissible would be

45dB.

With greater attenuation over 45dB,

accessory ZBVNG650-… can be

used to increase attenuation in the

camera branch to 45dB and in the

monitor branch to 55dB.

On the following double page, the

precise function of the bus distrib-

utor is explained in detail.

12

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