Description Of Zoom Lens Parts (J15X9.5B4Krs) - Hitachi FP-Z31 Operation Manual

Hide thumbs

Table Of Contents

Table of Contents

�

•

• • •

Auto iris weighting detection

A weighting system is used to prevent iris control from being effected by the bright area of the upper part

of the screen. Inclined weighting is used for the top one-third of the screen and so the detection sensitivity

decreases as the top edge of the screen is approached. Therefore, the iris moves minimally even when the

sky or a bright object enters at the top edge of the screen which means that a natural picture quality is

produced as a result.

A uniform iris sensitivity applies to the area in \he lower two-thirds of the screen.

6.5.2

Masking

The . masking is used for the fine color adjustment if required.

(1) Set SW-1 !MASK! to the ON position.

(2) Adjust RV-10, 11, 12 and 13 while monitoring a vectorscope or a picture. Because of the masking

system, there js no change independently for each color.

6.5.3

Adjustments with genlock

Proceed with the following adjustment for alignment with the system when the camera is used in the

genlock mode.

(1) Horizontal sync signal phase (RV-1 !H.P!)

Monitor the sync signal on a waveform monitor operating on external sync and adjust so that the phase

coincides with the phase of the genlock source signal.

(2) Subcarrier phase (SW-1 SC COARSE 1 ) (SW-2 SC COARSE 2 ) (RV-3 SC.F )

Connect the camera's color bar signal to a vectorscope operating on external sync and adjust so that

the burst phase of the camera output signal and burst phase of the external genlock signal coincide.

Set to about 90 deg. with SW-1 and SW-2 in each case for a coarse adjustment and then use RV-3 for

the fine adjustment.

RV-1 horizontal sync phase and RV-3 subcarrier phase controls are both 10-t'!flil variable resistors,

providing easy fine adjustment.

6.6