JVC KA-R25U User Manual

Return Video Unit

KA-R25U

Product Information Manual

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The return video unit provides the GY-HD250U user with the ability to display the return
video signal from a camera control unit (CCU) through the GY-HD250U electronic
viewfinder (EVF) in studio configurations that do not use the KA-HD250U. This unit
requires that a third party CCU from Camplex or Telecast Fiber with appropriate
camera adapter cabling* be used to control this unit.

*NOTE: Camera adapter connection cables are sold separately by their respective companies:

Camplex Cable Part No. CAIC-23-D112

Telecast Fiber Cable part No. CHCS-B03-JVC-3B-X1-10D-REV#2

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The absence of the KA-HD250U enables the studio configured GY-HD250U to be
mounted on the shoulder, providing the videographer with mobility and positioning
flexibility.

Connection and Installation Instructions

1

2

4

3

1. GY-HD250U EVF Input (20-Pin Male)

This connection is used to provide the EVF output signal from the GY-HD250 to the
return video unit. Connect this plug to the GY-HD250U’s 20-Pin RGB viewfinder output.

2. Return Control Input (Wire)

This input is used to switch the unit’s output between the GY-HD250U’s VF video and
the return video. Connect his input to GY-HD250U’s 10-pin studio connector with the
wire supplied by either Camplex or Telecast Fiber camera adapter cabling (See
previous page for the respective third-party CCU cabling part numbers).

3. Return Video Input (BNC Male)

Connect the third-party camera adapter VBS return video signal to this BNC input.

4. EVF Output Connection (20-Pin Female)

Insert the GY-HD250U’s 20-pin EVF connector to this output.

Required Camera Settings

! Set the GY-HD250 menu selection “VF SIGNAL” to “RGB”.
! Set the GY-HD250 menu selection “Tally System” to “Studio”.

The EVF signal switching is controlled by the KA-R25U return video unit. The normal EVF
output is the GY-HD250U RGB signal. When the RET (return) button located on the lens
control handle is depressed and held down, a converted Black & White image of the return
video signal is shown in the EVF. Once the RET button is released, the KA-R25U switches
the EVF image back to the RGB signal from the camcorder.

Mounted View

The KA-R25U return video
unit mounts conveniently on
the GY-HD250U’s handle as
shown (right). The original
EVF and microphone can be
used after the return video
unit is mounted.