Clear KB-702 User Manual download pdf (Page 18)

KB-702/KB-702GM TWO-CHANNEL SPEAKER STATIONS

3-2

BLOCK DIAGRAM FOR THE KB-702GM

Figure 3-8: KB-702GM Block Diagram

EQ/

LIM

Mic Select

Headset

Mic

Panel

Mic

Talk

Sidetone

Null

Call

Light

Call

Intercom

Volume

Red /

Green

Speaker

On/Off

TW Option

Channel

Switch

Ch. A

Speaker

Power

Ch. B

Call Send &

Receive

RMK

Microprocessor

Talk/

VOX

Headset

Output

Balanced

Program

Input

Speaker

Dip

Program

Mute

Mic Dip /

Mute

VOX

Common

+30 VDC

Ground

Latch

Disable

Long Line

Program

Level

Call Alert

Tone Level

4-Wire

Input

4-Wire

Output

2-Wire / 4-Wire

Select

Rectifier

16 VAC

Power

Ch. B

Ch. B

Ch. A

Ch. A

4-Wire

Option

Single

Chan.

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 27 28

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