- المجال:
- Number of terms: 20560
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- Company Profile:
Tektronix provides test and measurement instruments, solutions and services for the computer, semiconductor, military/aerospace, consumer electronics and education industries worldwide.
A measure of the similarity of the impedance of a transmission line and impedance at its termination. It is a ratio, expressed in dB, of the power of the outgoing signal to the power of the signal reflected back from an impedance discontinuity.
Industry:Software
SRI International owns DSRC, developer of the ACTV schemes.
Industry:Software
a) To add or subtract from and EDK time or switcher sequence duration. b) To perform some minor adjustment or X, Y, or Z axis on ADO or switcher effects.
Industry:Software
A 13-bit code in the transport packet header.
PID 0 indicates that the packet contains a PAT PID. PID 1 indicates a packet that contains CAT. The PID 8191 (all 1s) indicates null (stuffing) packets.
All packets belonging to the same elementary stream have the same PID.
Industry:Software
a) A process that allows two signals to modulate a single carrier frequency. the two signals of interest Amplitude Modulate carrier signals which are the same frequency but differ in phase by 90 degrees (hence the Quadrature notation). The two resultant signals can be added together, and both signals recovered at the other end, if they are also demodulated 90 degrees apart. b) Type of modulation for digital signals (DVB-C). Two signal components I and Q are quantized and modulated onto two orthogonal carriers as appropriate for the QAM level (4, 16, 32, 64, 128, 256). The constellation diagram is obtained by plotting the signal components with I and Q as the coordinate axes.
Therefore, 2, 3, 4, 5, 6, or 8 bits of a data stream are transmitted with one symbol, depending on the QAM level (4, 16, 32, 64, 128, 256). This type of modulation is used in cable systems and for coding the COFDM single carriers.
Industry:Software
A picture monitor displaying ADO video output can be thought of as a window which reveals a finite area of target space.
Industry:Software
In display terms, the pixel color information is stored in four bits across four memory planes. This allows a maximum of 16 colors (24). See Packed Pixel.
Industry:Software
The persistence of a sound after the source stops emitting it, caused by many discrete echoes arriving at the ear so closely spaced in time that the ear cannot separate them.
Industry:Software
