TLV-400S H.264/MPEG-2 Professional Digital TV Receiver User’s Manual
ASPECT RATIO: The ASPECT RATIO sub-menu allows you to change the aspect ratio of MAIN video.
Types are 16 x 9 and 4 x 3. There are some limitations of the aspect ratio depending on the video resolution
(DISPLAY MODE). Refer to the next table:
Resolution (DISPLAY MODE)
Supported Aspect Ratio
1080i
16:9
4:3
720p
16:9
4:3
576p/480p
16:9
4:3
576i/480i
16:9
4:3
SCREEN MODE: The SCREEN MODE sub-menu allows you to change the screen zoom option. Types are
LETTER BOX, IGNORE, and PAN-MODE. This is particularly important when the incoming image comes
with a special ratio and sometimes you have to adapt it to fit your display in order to avoid an image
distortion. Usually it is used when a 16x9 signal is being displayed on 4x3 monitor. The LETTER BOX mode
displays the whole picture with black bars on top and bottom. The PAN-MDOE zoom in the picture on the
top and bottom.
SYNCHRONISATION THRESHOLD: The SYNCHRONISATION THRESHOLD sub-menu allows you to
change the synchronisation threshold value. The default value is 1 frame and the maximum value is 5 frames.
3.2.2.3 CONFIG/MAIN/AUDIO sub-menu
AUDIO: The AUDIO sub-menu allows you to change the type of audio. There are DOWNMIX,
LANGUAGE, VOLUME, MUTE, VOLUME METER, SDI AUDIO, SAMPLING FREQ, and
SYNCHRONISATION THRESHOLD sub-menus.
DOWNMIX – Lt/Rt (Dolby Prologic): For setting a configuration of the analog audio output. Types are Lt/Rt
(Dolby Prologic) ON and OFF. In the PCM mode, the user can select either Lt/Rt (Dolby Prologic) ON or
OFF. In the Lt/Rt (Dolby Prologic) ON, the analog audio output provides a Dolby Pro-Logic encoded signal
(L/R/Ls/Rs/W) if the incoming compressed audio is AC-3 format and it contains a Pro-Logic encoded signal.
If the system doesn’t have a surround sound decoder, it would be treated as normal stereo (L/R) tracks. The
decoding chip in Dolby Pro-Logic emphasize directional sounds by increasing the output of the directional
sounds in their respective channels, this adds more accuracy to the sound. In the Lt/Rt (Dolby Prologic) OFF,
it will create a pure stereo signal. Analog audio is through XLR connector labeled L1,R1 and D-Sub 9P
labeled L2,R2.
DOWNMIX – Lo/Ro : In the Lo/Ro ON, multichannel surround audio (L/R/C/Rs/Ls/W) is encoded by
Lo/Ro. In DOWNMIX OFF, it will create a pure source signal.
LANGUAGE: For configuring of the audio language output. The user can choose the language to be used
within the options sent with the broadcasted incoming signal. This sub-menu supports four languages. If
there is no language available for selected channel setting, then it will be serviced automatically to first
AUDIO.
VOLUME: For setting the volume of the audio. The volume can be adjusted within the range from –1dB to –
20dB and maximum.
MUTE: For setting a mute option for audio output. Types are mute ON or OFF. If the mute option is ON,
there will be no sound output.
VOLUME METER: Display on screen volume meter display.
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