Sony DSR-300 Service Manual page 73

S/N S video connectors
Signal-to-Noise ratio. The relation Input/output connectors for
of the strength of the desired signal separate Y (luminance) and C
to the accompanying electronic (chroma) signals. This method
interference, the noise. If S/N is eliminates interference between Y
high, sounds are reproduced with and C signals that can occur in
less noise and pictures are conventional composite video
reproduced clearly without snow. signals to obtain a higher-
resolution picture.
Search
The search function enables Sync
recorded images or time codes to This refers to the sync
be viewed while the tape is played (synchronization) signal. The sync
back at various forward or reverse signal is used as a reference signal
speeds, as a means of locating a for duplicating the scanning
particular scene in the taped patterns recorded via a camera
program. when playing back the recording
on a monitor. The sync signal
Standby-off mode
actually includes two signals: a
One of the stop modes. In this horizontal sync signal and a
mode, head drum rotation is vertical sync signal.
stopped and the tape tension is
slackened. It is not possible to Time code
switch instantaneously from this The time code is a tape position
mode to recording or playback information signal that includes
mode. This mode is not harmful to time and frame data that are
the tape or heads. recorded onto the tape when
shooting so as to facilitate
Standby-on mode
searching of editing points and
One of the stop modes. In this recorded scenes when viewing or
mode, the head drum continues editing.
rotating and the tape remains
wound onto the drum. This mode User bits
enables instantaneous switching to These are also referred to as
recording or playback mode. To "users' bits". The user bits are a
prevent damage to the tape or 32-bit segment of the time code
heads, the device automatically recording area. The user can select
switches from standby-on mode to what to record in this segment and
standby-off mode after a certain how to use the recorded data. For
example, it can be used to record
period of time.
date information in addition to the
time code data or ID numbers for
tape reels or programs.
Sony Corporation
Printed in Japan
124
Appendix
Video gain
Amount of amplification for video
signals, expressed in decibels (dB).
White balance adjustment
In the light of a particular color
temperature, to adjust the white
levels of the R, G, and B channels
of a color video camera so that any
white object shot in that light is
reproduced as a truly white image.
Zebra pattern
Striped patterns which appear in
the viewfinder to indicate areas of
the image where the video level is
about 70 IRE (NTSC) or 70%
(PAL). The DSR-300/300P can
show areas where the video level is
100 IRE (NTSC) or 100% (PAL).