video bandwidth


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video bandwidth

The signal capacity required to transmit video content. The following chart shows the maximum bandwidth required in MHz for common analog and digital standards, as well as the bandwidth range in Mbps for digital TV (DTV). The Mbps ranges from low-motion frames to high-motion frames.

BANDWIDTH (BW) REQUIREMENTS--Analog--   ------DTV-----ActiveNTSC  PAL    SD    HD    HDPixelsHoriz.    451   538    640  1280  1920
  Vert.    483   576    480   720  1080

 FPS       30i   25i    60p   60p   30i

 MaximumBW (MHz)  4.2   5.1    7.9  26.0  26.0

 BW Range (Mbps)        2-9  6-25  7-28
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The auto-tune function automatically sets center frequency to the maximum signal within the full measurement span and optimizes settings for RIM, video bandwidth (VBW), and sweep time.
This ripple, which is at twice the input frequency, appears because the input frequency and the video bandwidth are close to one another.
The units have a dynamic range of 65 dB to 70 dB, a TSS of -67 dBm and a nominal video bandwidth of 20 MHz.
Units feature an 8 MHz video bandwidth and 10 dB optical budget for applications where the distance is less than 2 miles.
Bill Ayer includes a chart that shows sensitivity for 0-dB signal-to-noise (SNR) ratio [approximately equal to] -54 + 5[Log.sub.10][B.sub.V] dBm for "good" 1956-vintage detector diodes (where [B.sub.V] is the video bandwidth in megahertz).
The 4540 family supports sensors up to 110 GHz with a range of-70 dBm to + 44 dBm (CW) and -55 dBm to + 20 dBm (peak), a 70-MHz video bandwidth, up to 7-ns input rise times, and time resolution of 200 ps.
These units have a dynamic range of 65 to 70 dB, a TSS of -67 dBm and a nominal video bandwidth of 20 MHz.
The GRM monitor was designed with full multisynch ability and a video bandwidth of 150 MHz at -3 dB so viewers see clean, clear images in all IBM and VESA standards and in any video mode from 640 X 480 pixels up to 1,600 X 1,200 pixels.
The link transmits color or black-and-white video signals at distances up to 1.5 miles over standard multimode fiber lines, with a video bandwidth of 8 MHz.
A further limitation in the utility of this estimator lies in the mathematical relationship between the autocorrelation time delay, the video bandwidth and the RF bandwidth.