- Industrie:
- 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.
To activate a restart sequence to a CPU, ILC, or other device which has locked up or is for some other reason not responding correctly.
Industry:Software
Designation of certain bandwidths at certain frequencies for certain purposes. For example, channel 2 has been allocated 6 MHz of bandwidth from 54 MHz to 60 MHz for television broadcasting. All ATV transmission schemes require some form or another of spectrum allocation.
See also Frequency Allocation Table.
Industry:Software
Transient gain distortion, also referred to as transient nonlinearity, is present when abrupt changes in APL temporarily affect signal amplitudes. The error is defined as the maximum transient departure in amplitude of a sync pulse from the amplitude it had before the change to the amplitude after the change. Measurement of transient gain distortions is done as an out-of-service test and should be checked for transitions of low-to-high APL and high-to-low APL. If the transient gain distortion only affects the sync pulse and then not so severely as to cause the sync to be unusable, then the viewable picture would not be affected.
However if the sync pulse is affected, the rest of the picture is also normally affected; when transient gain distortions affect the picture, it appears as abnormal transient brightness effects. A test signal generator capable of producing a “bouncing” flat-field signal is used to test for transient gain distortions. A typical signal is shown below. The time between bounces (APL level changes) must be longer than the transient effects so that all the transient effects can be viewed before the next APL change occurs.
Industry:Software
A camera tube in which a low-velocity electron beam scans a photoemissive mosaic on which the image is focused optically and which has electrical storage capability.
Industry:Software
Integrated circuit memory that is manufactured with a pattern of all logical 0s and 1s and has a specified pattern written into it by a special hardware programmer.
Industry:Software
Pulses that occur during the vertical sync interval, at twice the normal horizontal scan rate. These pulses ensure correct 2:1 interlacing and eliminate the buildup of DC offset.
Industry:Software
A device that allows transitions between different video pictures. May contain special effects generators. Also called production switcher or switcher.
Industry:Software
Emitting or capable of emitting electrons upon exposure to radiation in and near the visible region of the spectrum.
Industry:Software
A physical button on the workstation that you press to reinitialize the processor and some other hardware without removing power to the workstation. You should never press this button while IRIX is running, unless all attempts to shut down the system using software fail. See also Shut Down.
Industry:Software
