Installing the ferrite core, Genlock connection

CONNECTION/INSTALLATION
Installing the ferrite core
To retain electromagnetic compatibility, use the ferrite cores provided when connecting to
the lens.
Video-iris lens
(or galvanometnc-iris lens)
ALC	Av Pk
LEVEL	L H
VIDEO
DC

MEMO

•If thin cables are used (i.e. with a high resistance), a significant voltage drop will occur when the unit is at its maximum power consumption. Either use a thick cable to restrict the voltage drop at the camera side to below 10%, or place the power supply near to the camera. If voltage drop occurs during operation, the performance will be unstable.

•Attach the cable conductors so that they do not come into contact with the drop prevention wires.

•Do not allow input from both a DC 12 V and AC 24 V power supply at the same time.

•When using a DC 12 V power supply, ensure that the polarities of the cable are correct.

•The AC 24 V power supply should conform to the following: Isolated power supply only

Ferrite core

Wire clamp

Notes:

Install the ferrite cores within 50 mm of the camera-side connectors. (Fasten the ferrite

core with the wire clamp provided.)

Control signal cables

These cables should be connected only when it is required to control the camera using the RS-442A or RS-485 signals. The use of 0.65 4-conductor twisted pair cables is recom- mended. With these cables, the maximum ex- tension distance is 1,200 m.

Genlock connection

With some systems, when the external sync signal is a composite video or black burst sig- nal genlocking by applying an external sync input requires the horizontal phase (H PHASE) and colour phase (SC COARSE) to be adjusted.

Connections on the back Power supply (DC 12 V or AC 24 V)

	+	-
	1	2
DC12V	AC24V	CLASS2 ONLY(U TYPE) ISOLATEDPOWER ONLY (E TYPE)
		TX+ TX- RX+ RX- AUX GND
		A B C D
		Y/C OUT
	SYNC IN	VIDEO OUT
		SEE INST-
	POWER	RUCTION
	POWER	MANUAL

Connect the DC 12 V or the AC 24 V power
supply to the DC 12V/AC 24V terminals. To
prevent connection errors or a				cable
disconnection, we recommend the use of lug
plates for the connections.
The following table shows the connection
distances and connection cables provided
that 2-conductor VVF cables (vinyl-insulated
vinyl sheath cables) are used.
Maximum extension	100 m	260 m	410 m	500 m
(reference)	100 m	260 m	410 m	500 m
(reference)
Conductor	1.0∅mm	1.6∅mm	2.0∅mm	2.6∅mm
diameter	and more	and more	and more	and more

		Connect to the other	MEMO
A	TX+	Connect to the other	• Genlocking is not possible with a signal con-
B	TX-	side in pairs like this.	taining too much jitter, such as a VCR or
			taining too much jitter, such as a VCR or
			videodisc playback signal.
C	RX+	Connect to the other	videodisc playback signal.
D	RX-	side in pairs like this.	• For details, consult a JVC authorized dealer.

E-16

E-17

CONNECTION/INSTALLATION