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ManualsBrandsDTC Communications ManualsElectronicsMOBILE VIDEO TRANSMITTER OPERATING IN S-BAND
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PROGRAMMING
Video Input
Video input selects the video format going into the MPEG video compressor. Options are: OFF
(no video input typically used when link is used for data only), PAL, NTSC, NTSC no pedestal,
S-Video PAL, S-Video NTSC, S-Video NTSC no pedestal.
MPEG Mode
MPEG mode selects the MPEG compression being used, options are: MPEG2 or MPEG4. MPEG4
mode has to be used when in the 1.25 MHz bandwidth mode since this mode uses a nonstandard
frame rate that is not supported by MPEG2.
MPEG4 Encoding Mode
MPEG4 encoding mode selects the characteristics of the MPEG4 compression. Options are: low
delay interlaced, standard delay interlaced, low delay progressive, standard delay progressive, and SIF.
Interlaced scanning is what is used in conventional over-the-air video. Progressive scan is available on some
cameras and involves scanning an entire frame in one pass rather than two in interlaced scanning. SIF is a
bandwidth-conserving camera scan mode that cuts resolution in half in both the horizontal and vertical.
MPEG4 Frame Rate
MPEG4 frame rate selects the frame rate used in the MPEG4 mode, full frame rate is 30 fps for NTSC and
25 fps for PAL a frame rate of 1/2 or less has to be used in 1.25 MHz bandwidth mode. Options are: Full,
1/2, 1/4, 1/8. or 1/24.
Video Bitrate (status only)
Video bitrate is a status window that will display the video transport data rate, this varies with bandwidth,
modulation, FEC rate and guard interval. The rate will increase with bandwidth and higher levels of
modulation, it will go down as the FEC rate and guard interval are increased. The video bit rate will also
decrease as other service options are activated such as audio and data channels. As a rule video quality and
latency improve as the bit rate is increased.
Horizontal Resolution
Horizontal resolution determines the maximum number of horizontal Pixels that can be sampled by the
video encoder. For optimal performance this setting should be set to the first value that exceeds the
horizontal resolution of the camera in use. Options are: 352, 480, 528, 704 pixels.