RCA LDK 5481, LDK 4700 manual Intercom, Schematic overview of the intercom routing

LDK 5481 + LDK 4700 User’s Guide DigiLink system

1-6

1.5Intercom

An intercom channel connects the base unit to the camera operator's headset. The operator's intercom microphone signal is sent to the base unit. The headset can be connected to the 5 pin XLR headset connector at the back of the DigiLink adapter. For the connector and detailed pin descriptions refer to chapter 2.7.7.

A conversation is started when the camera operator presses the VTR Start button at the front of the camera or the VTR button on the lens. The function and behaviour of this button can be defined in the INSTALL menu of the camera. Refer to the camera’s user’s guide.

The volume of the headset earmuffs can be adjusted by turning the audio volume knob at the front (right side) of the camera.

Intercom configuration

The sidetone volume level (feedback signal from the microphone to the earmuffs) can be adjusted withthe INSTALL/INTERCOM/SIDETONE function n the camera (available only when a 4-wire connection is used).

Depending on the type of microphone the following items can be set in the INSTALL/ INTERCOM menu in the camera:

•Microphone gain level (0 or +40 dB) with the CAM.MIC_GAIN function;

•Microphone power can be switched on or off with the CAM.MIC_POWER function.

Both 2-wire and 4-wire intercom connections can be used. On the base unit, set the setup switch S1 in the Off-position when a 4-wire connection is used and set it in the On-position when a 2-wire connection is used. Refer to chapter 3.5.2 for the description of the setup switch.

The following figure shows an overview of the routing of the intercom system. For the connector and detailed pin descriptions refer to chapter 3.4.

Figure 1-8. Schematic overview of the intercom routing

DigiLink adapter DigiLink base unit

0 / 40 dB

Mic in

-24/-64 dBu

Cam Video

EXT/TP video

Out

0 dBu

front volume

Cam SDI OUT

Cam SDI IN

	PROD out (4-wire)
	PROD in/out (2-wire)
	0 dBu
	pin 1,9 return
	SDI
	EXT
2 w.	TP
	PROD in (4-wire)
4 w.
	0 dBu
S1 Off = 4-wire	pin 5, 13 return
S1 On = 2-wire

v4.0