Specifications
TDS 520A, 524A, 540A, & 544A Service Manual
1Ć7
Both H Bar and V Bar cursors can also be used to make absolute measureĆ
ments; that is measurements relative to a defined level or event. For the
H Bars, either cursor can be selected to read out its voltage with respect to
any channels ground reference level. For the V Bars, it's time with respect to
the trigger point (event) of the acquisition, and the cursors can control the
portion of the waveform on which automatic measurements are made.
For time measurements, units can be either seconds or Hertz (for 1/time).
When the video trigger option installed (Option 05), the video line number
can be selected using the vertical cursors. IRE amplitude (NTSC) can be
measured using the horizontal cursors with or without the video trigger option
installed.
Measure
Measure can automatically extract parameters from the signal input to the
Digitizing Oscilloscopes. Any four out of the more than 20 parameters availĆ
able can be displayed to the screen. The waveform parameters are measured
continuously with the results updated onĆscreen as the Digitizing
Oscilloscopes continues to acquire waveforms.
Digital Signal Processing (DSP)
An important component of the multiprocessor architecture of this Digitizing
Oscilloscopes is Tektronix's proprietary digital signal processor, the DSP. This
dedicated processor supports advanced analysis of your waveforms when
doing such computeĆintensive tasks as interpolation, waveform math, and
signal averaging. It also teams with a custom display system to deliver speĆ
cialized display modes (See , later in this description.)
Acquired waveforms may be saved in any of four nonvolatile REF (reference)
memories or, if available, on a 3.5 inch, DOS 3.3ĆorĆlater compatible disk. The
disk is standard on the TDS 524A and 544A. It is available as option 1F on the
520A and 540A. Any or all of the saved waveforms may be displayed for
comparison with the waveforms being currently acquired.
The source and destination of waveforms to be saved may be chosen. AsĆ
signment can be made to save any of the four channels to any REF memory
or to move a stored reference from one REF memory to another. Reference
waveforms may also be written into a REF memory location via the GPIB
interface.
The Digitizing Oscilloscopes is fully controllable and capable of sending and
receiving waveforms over the GPIB interface (IEEE Std 488.1-1987/IEEE Std
488.2-1987 standard). This feature makes the instrument ideal for making
automated measurements in a production or research and development
environment that calls for repetitive data taking. SelfĆcompensation and
Storage and I/O
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