1. OVERVIEW
1 - 1
BS-79 0212 VOL1 (U) (E)
BS-79
1.
OVERVIEW
1.1
Overview
The BS-79 is a half-rack-sized HDTV base station that fits
into the space of half a 19-inch rack.
The BS-79 uses an 8-core optical fiber camera cable (two
single-mode fibers, four power lines, and two control lines).
It can transmit video and audio signals with optical serial
digital transmission conforming to SMPTE 292M
(international standard) over distances of up to 1000 m with
no degradation in high-quality image provided from the
camera head.
Basic configuration of this unit includes down converter (D/
C) and up converter (U/C) modules and a power supply.
1.2
Characteristics
Being half-rack size, yet supporting simulcast
As a result of reviewing the circuit configuration and parts to
reduce the size, the BS-79 contains up and down converters
within its half-rack size, which implements HD and SD
simulcast output.
<1>
Allows simultaneous output of HD SDI, SD D1, and
SD ENC.
<2>
Can select HD SDI, SD D1, or SD composite as the
RET input (when the RET module is selected)
<3>
Also allows monitoring with WFM and PM for SD
when the main line is for HD (when the SD module
is selected)
Capable of DC operation
Sup12 VDC to the BS-79 can also drive the camera
head.
This function allows operation using +12 V supplied from
ordinary vehicles to provide mobility.
Aspect ratio conversion by the down converter (D/C)
The internal down converter (D/C) has an aspect ratio
conversion function. There are three types of modes: side
panel mode, squeeze mode, and letter box.
Choice of external synchronization signal
You can select 525/59.94 BBS or 1080/59.94 PS/S as the
external synchronization input.
1.3
Specification
■
Rating
1.
Scanning format
1080 effective scanning lines, 59.94 Hz, interlaced
480 effective scanning lines, 59.94 Hz, interlaced
2.
Operating temperature range
0
°
C to +45
°
C (Humidity: 30% to 90%)
3.
Working voltage
100/117 VAC or +12 VDC
4.
Weight
About 10 kg (22 lb)
■
Performance
1.
Video frequency characteristics (HDTV output signals)
Y output signal
Lower than 60 Hz:
Dropping characteristic
60 Hz to 30 MHz:
Within
±
1.0 dB
30 MHz or higher:
Dropping characteristic
Pb and Pr output signals
Lower than 60 Hz:
Dropping characteristic
60 Hz to 15 MHz:
Within
±
1.0 dB
15 MHz or higher:
Dropping characteristic
2.
Video frequency characteristics (NTSC output signals)
Ych, 100 kHz standard (when the down converter is installed)
Lower than 60 Hz:
Dropping characteristic
60 Hz to 4.5 MHz:
Within
±
0.5 dB
4.5 MHz to 5 MHz: Within
±
1.0 dB
5 MHz or higher:
Dropping characteristic
3.
Voice frequency characteristics
Lower than 100 Hz: Dropping characteristic
100 Hz to 10 kHz:
Within
±
1.0 dB
10 kHz or higher:
Dropping characteristic
4.
S/N (when an HDK-79D is connected)
HDTV
-54 dB r.m.s.
NTSC
-62 dB r.m.s.
5.
S/N (when an HDK-79E is connected)
HDTV
-56 dB r.m.s.
NTSC
-64 dB r.m.s.
6.
Modulation degree (when an HDK-79D is connected)
HDTV
About 40% or more
(800 TV lines, 27.5 MHz)
NTSC
About 90% or more
(400 TV lines, 5 MHz)
7.
Modulation degree (when an HDK-79E is connected)
HDTV
About 45% or more
(800 TV lines, 27.5 MHz)
NTSC
About 90% or more
(400 TV lines, 5 MHz)
