Tabor Electronics 5064, Руководство пользователя

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2074
User Manual
3-34
output connector.
Reset Parameters
– Resets the exponential pulse wave
parameters to their original factory defaults.
DC Wave
The DC waveform is useful for applications requiring simply and
accurate DC level. There are certain menus that provide access to
the DC waveform parameters; These are:
DC Level
– programs the level of the DC output function. The
amplitude is programmed in units of volts and generated
continuously at the output connector in a similar way as a power
supply generates its output. Note however, that the amplitude is
calibrated when the output is terminated into 50
Ω load impedance.
Reset Parameters
– Resets the DC amplitude parameter to its
original factory default.
Noise Wave
The noise waveform is useful in applications requiring generation of
simple noise. The spectral spread of the noise is pseudo-random
and is limited in its bandwidth by the bandwidth parameter. The
noise parameters are re-computed every time a parameter is
changed. 1000 points are allocated for the noise shape up to about
frequency setting of 200 kHz (output frequency = sample clock
frequency / number of points). As frequency is increased above 200
kHz the number of points is being reduced automatically. The noise
waveform is reasonable up to about 2 MHz where 100 points are
available to generate its shape. As the number of points decrease
further, the shape of the noise is deteriorated to a point where it is
not usable anymore.
There are certain menus that provide access to noise waveform
parameters; These are:
Amplitude
– programs the amplitude of the output waveform. Note
that amplitude and offsets can be programmed freely within the
specified amplitude window, as explained in the Programming
Amplitude and Offset section in this chapter. Note that setting the
amplitude parameter in this menu overrides amplitude setting in all
other menus.
Offset
– programs the offset of the output waveform. Note that
offset and amplitude can be programmed freely within the specified
amplitude window, as explained in the Programming Amplitude and
Offset section in this chapter. Note that setting the offset parameter
in this menu overrides offset setting in all other menus.
Bandwidth
– sets the sample clock rate which generates the noise.
It also serves as a simple tool to limit the bandwidth of the noise to