Sony DXC-637 Service Manual page 26

Color video camera
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This section covers the settings for electronic shutter
speed and the clear scan function.
Shutter speeds
There are five shutter speeds, from '/100 s (NTSC) or
"feo s (PAL) to '/2000 5. Increasing the shutter speed
teduces blurring when shooting a fast-moving subject.
It is also possible to reduce flicker when shooting
under fluorescent lighting by changing the shutter
speed.
Clear scan function
When shooting a computer screen or projected image,
horizontal bands may appear in the camera image.
This is because the vertical scan frequency of the
computer-generated image is different from the
vertical scan frequency of the video system. The clear
scan function allows you to select a vertical scan
frequency to reduce this interference.
Setting the shutter speed and clear scan
function
Notes on setting the shutter speed
If the EVS function setting in the advanced menu is
ON, it is not possible to change the shutter speed.
© The faster you make the shutter speed, the darker the
image becomes. Check the brightness in the
viewfinder, and if necessary increase the lighting
level or adjust the iris.
© When the shutter speed is very fast, shooting a high
intensity subject may cause long vertical tails to
appear on the highlights (smear).
Note on setting the clear scan function
The vertical scan frequencies of computer screens
vary, and it may not be possible to eliminate the
interference patterns entirely. Note also that the
vertical scan frequency may change depending on the
software being run.
1 Set the SHUTTER switch to the ON position.
The SHUTTER indicator in the viewfinder comes
on, and it is now possible to make the shutter speed
or clear scan function setting.
2 Operate the DISP CHG switch to align the cursor
with the item "SHUTTER" in basic menu 1.
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3 Press the UP/ON button or DOWN/OFF button to
select the required shutter speed or scan frequency.
Each time you press the UP/ON button or DOWN/
OFF botton, the shutter speed or clear scan
frequency setting changes in the following order:
4/100 (NTSC)
(Value when shipped)
1/250 <—* 1/500 «—-» 1/1000 «—
1/2000:
1/60 (PAL) mena |
200.3Hz - . . 60.4Hz (NTSC)
201.4Hz- - - 60.3Hz (PAL)
When using the clear scan function
Watching the monitor screen, adjust the frequency
to give minimum interference.
If there is a black band in the monitor image,
reduce the frequency, and if there is a white band,
increase the frequency.
The new value for the shutter speed or clear scan
frequency remains set until changed, even when
the camera is powered off.
47
48
Adjustments and Settings
To return from the basic menu to the normal
indications
Press the DISP CHG switch as many times as
necessary until the normal indications appear. The
new setting of the shutter speed or clear scan
frequency appears in the normal screen display.
When shooting is finished
Set the SHUTTER switch to the OFF position.
The SHUTTER indicator in the viewfinder goes off.
By setting the internal real time clock, you can
timestamp recordings by superimposing the date and
time.
If after setting the clock with the following procedure
the date and time do not appear in the viewfinder when
you set the CLOCK switch to the ON position, the
internal lithium battery is exhausted. In this event,
consult your Sony service representative.
Setting the clock
1 Set the CLOCK switch to the ON position.
The date and time appear in the viewfinder.
2 Press the CLOCK SET button.
The year indication flashes.
3. Use the DISP CHG switch and UP/ON and
DOWN/OFF buttons to adjust the date and time
indications.
@ Press the DISP CHG switch up or down to
make the item to be changed flash.
@® Press the UP/ON button to change the setting.
if you advance a numericaf value too far
Press the UP/ON button and DOWN/OFF
button simultaneously to reset the value to zero,
then press the UP/ON button again to set the
correct value.
@® Repeat steps @ and @ to set the year, month,
day, hour, and minute.
4 Select 12-hour or 24-hour indication.
@ Press the DISP CHG switch up or down.
The AM/PM or iff indication flashes.
@ Press the UP/ON button to switch between 12-
hour times (with the AM/PM indication) and
24-hour times (with the Mf indication).
5 Select the date indication order.
Pressing the UP/ON button cycles through the
three orders as follows. (Pressing the DOWN/OFF
button cycles through in the reverse order.).
YY-MM-DD (e.g. 95-01-25)
MM-DD-YY (e.g. 01-25-95)
DD-MM-YY (e.g. 25-01-95)
6 Press the CLOCK SET button.
This starts the clock, with a seconds value of zero,
so for accurate timing synchronize this press to a
time signal.
To clear the date and time display
Move the CLOCK switch to the OFF position.
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