Chapter 2 About Arbitrary Waveforms
More on Waveform Cycle
More on Waveform Cycle
TEGAM’s 2411B arbitrary waveform generator may sample the data points up to a maximum of 2
MS/s. The maximum frequency of the output is determined by the sample rate divided by the number of
points. For a 2 MHz arbitrary waveform generator with a waveform length of 1000 points, the upper fre-
quency limit appears to be 2 kHz, since 2 MS/s / 1000 = 2 kHz. However, if you repeat the segment,
such as a sinewave, up to the minimum required number of samples (4 samples/segment), you can repli-
cate up to 250 segments within the waveform length of 1000 points. Then, the output frequency of the
sinewave will be 500 kHz, since 2 kHz x 250 = 500 kHz.
Digital and Analog Scaling
Whenever possible range the Y-values of a waveform between -32768 to +32767 in the memory to
obtain maximum resolution and to maintain the desired dc integrity of the signal. WaveWorks Pro allows
you to normalize any waveform in its Y values by a simple command. For instance, if you have a
sinewave in the waveform window that ranges from -32768 to +32767 you can specify the output at 5
volts peak-to-peak. Automatically the -32768 relative amplitude will be scaled to -2.5 volts and the
+32767 relative amplitude will be scaled to +2.5 volts. The sinewave will be centered around zero volts.
The desired output voltage may be set on the front panel of the generator or on the Download Setup
form before the waveform is sent to the 2411B. If you set the output amplitude to 10 volts peak-to-peak
and then you download a waveform with Y-values b16384 and -16384, you have the same
+/-2.5 volt sinewave output. It is very important to understand the differences between digital scaling
and analog scaling. See the following page for the illustration.
Other Considerations
The Y values of the starting and ending points in your waveform can cause unexpected discontinuities if
they are not the same value. The waveform generator output will jump from the ending value to the
starting value of each cycle. If you are using the sequence generator in an arbitrary waveform generator,
the ending value of a waveform will jump to the starting value of the next waveform in the sequence.
For a smooth, transient-free waveform output, be sure the starting and ending values are the same for a
single waveform and the starting and ending values of adjacent waveforms are the same for a
sequenced waveform.
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Summary of Contents for 2411B
Page 10: ...1 Quick Start...
Page 22: ......
Page 23: ...2 About Arbitrary Waveforms...
Page 30: ......
Page 31: ...Chapter 2 About Arbitrary Waveforms 2411B Block Diagram 2 8 Block Diagram...
Page 32: ...3 Front Panel Menu Operation...
Page 41: ...4 Waveform Creation System...
Page 43: ...Chapter 4 Waveform Creation System User Interface for the Waveform Creation System 4 3...
Page 61: ...5 Multi Instrument Operation...
Page 68: ...6 Performance Verification...
Page 71: ...Chapter 6 Performance Verification Verification Test Sheet 6 4...
Page 72: ...7 Remote Interface Operation...
Page 78: ...Chapter 7 Remote Interface Operation Command Set Command Set 7 7...
Page 79: ...Chapter 7 Remote Interface Operation Command Set continued Command Set continued 7 8...
Page 80: ...Chapter 7 Remote Interface Operation Command Set continued Command Set continued 7 9...
Page 81: ...Chapter 7 Remote Interface Operation Command Set continued Command Set continued 7 10...
Page 82: ...Chapter 7 Remote Interface Operation Command Set continued Command Set continued 7 11...
Page 83: ...Chapter 7 Remote Interface Operation Command Set continued Command Set continued 7 12...
Page 84: ...Chapter 7 Remote Interface Operation Command Set continued Command Set continued 7 13...
Page 91: ...8 Advanced Remote Operation...
Page 125: ...Appendix...
Page 133: ...AMPLITUDE OFFSET RANGES...
Page 134: ...INDEX...
Page 140: ......