Norsat International Inc. NSLK3200 ユーザーズマニュアル
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Page 19
Audio & Video Encoding
The MPEG-2 Encoder accepts a single video and four mono audio inputs,
which are processed and compressed to produce an MPEG-2 transport
stream.
which are processed and compressed to produce an MPEG-2 transport
stream.
The video inputs accepted are either:
•
Composite video
•
SDI (optional)
A latency of either
N
ORMAL
(H
IGH
Q
UALITY
)
or
L
OW
(R
EDUCED
Q
UALITY
)
may be
selected.
N
OTE
There is a trade-off between the encoder latency and the quality.
The audio inputs, both the left (L) and right (R) channels, accepted are either:
•
Analog balanced audio (L and R)
•
Analog unbalanced audio (L and R)
in one of the following modes:
•
Stereo
•
Dual mono
The video processing is compliant with ISO/IEC 13818-2 and the audio pro-
cessing is compliant with ISO/IEC 13818-3.
cessing is compliant with ISO/IEC 13818-3.
Channel Coding and Modulation
The DVB Modulator accepts the MPEG-2 transport stream containing the
audio, video and data packets, and processes it as defined in ETS 300-421.
audio, video and data packets, and processes it as defined in ETS 300-421.
Upconversion, Frequency Level Control
The modulated signal is upcoverted to L-band; the center frequency of the
modulated signal is configurable with a resolution of 100 Hz. The Baseband/
IF unit provides greater than 30 dB of level control.
modulated signal is configurable with a resolution of 100 Hz. The Baseband/
IF unit provides greater than 30 dB of level control.
Reception of DVB-S/MPEG-2 TS
The Baseband/IF unit receives and demodulates, decodes and recreates IP
data from an MPEG-2/DVB-S transport stream received via satellite.
data from an MPEG-2/DVB-S transport stream received via satellite.
Encoded Video Display
The Baseband/IF unit can display the encoded video being transmitted in
real-time.
real-time.
The audio is provided to the user via a 1/8 inch mini jack.
N
OTE
The receiver must be set to Tx Local Loopback in order to monitor your own
audio and video.
audio and video.
Antenna Pointing Calculations
The Baseband/IF unit calculates the antenna azimuth, elevation pointing
angles and polarization using either a manually entered location or GPS loca-
angles and polarization using either a manually entered location or GPS loca-